| 1 | subroutine ttbb(track,ktrack,parvec) |
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| 2 | |
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| 3 | implicit none |
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| 4 | |
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| 5 | !----------------------------------------------------------------------* |
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| 6 | ! purpose: * |
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| 7 | ! track a set of particle through a beam-beam interaction region. * |
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| 8 | ! see mad physicist's manual for the formulas used. * |
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| 9 | !input: * |
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| 10 | ! input/output: * |
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| 11 | ! track(6,*)(double) track coordinates: (x, px, y, py, t, pt). * |
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| 12 | ! ktrack (integer) number of tracks. * |
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| 13 | !----------------------------------------------------------------------* |
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| 14 | integer ktrack,beamshape,b_dir_int |
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| 15 | double precision track(6,*),parvec(*),fk,dp |
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| 16 | double precision gamma0,beta0,beta_dp,ptot,b_dir |
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| 17 | double precision q,q_prime,get_value,node_value,get_variable |
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| 18 | double precision zero,one,two |
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| 19 | logical first |
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| 20 | save first |
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| 21 | data first / .true. / |
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| 22 | parameter(zero=0.0d0,one=1.0d0,two=2.0d0) |
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| 23 | ! if x > explim, exp(-x) is outside machine limits. |
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| 24 | |
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| 25 | !---- Calculate momentum deviation and according changes |
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| 26 | ! of the relativistic factor beta0 |
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| 27 | dp = get_variable('track_deltap ') |
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| 28 | q = get_value('probe ','charge ') |
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| 29 | q_prime = node_value('charge ') |
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| 30 | gamma0 = parvec(7) |
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| 31 | beta0 = sqrt(one-one/gamma0**2) |
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| 32 | ptot = beta0*gamma0*(one+dp) |
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| 33 | beta_dp = ptot / sqrt(one + ptot**2) |
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| 34 | b_dir_int = node_value('bbdir ') |
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| 35 | b_dir=dble(b_dir_int) |
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| 36 | b_dir = b_dir/sqrt(b_dir*b_dir + 1.0d-32) |
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| 37 | !---- pre-factor, if zero, anything else does not need to be calculated |
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| 38 | fk = two*parvec(5)*parvec(6)/parvec(7)/beta0/(one+dp)/q* & |
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| 39 | (one-beta0*beta_dp*b_dir)/(beta_dp+0.5*(b_dir-one)*b_dir*beta0) |
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| 40 | ! |
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| 41 | if (fk .eq. zero) return |
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| 42 | !---- choose beamshape: 1-Gaussian, 2-flattop=trapezoidal, 3-hollow-parabolic |
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| 43 | beamshape = node_value('bbshape ') |
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| 44 | if(beamshape.lt.1.or.beamshape.gt.3) then |
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| 45 | beamshape=1 |
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| 46 | if(first) then |
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| 47 | first = .false. |
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| 48 | call aawarn('TTBB: ', & |
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| 49 | 'beamshape out of range, set to default=1') |
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| 50 | endif |
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| 51 | endif |
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| 52 | if(beamshape.eq.1) call ttbb_gauss(track,ktrack,fk) |
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| 53 | if(beamshape.eq.2) call ttbb_flattop(track,ktrack,fk) |
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| 54 | if(beamshape.eq.3) call ttbb_hollowparabolic(track,ktrack,fk) |
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| 55 | |
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| 56 | end subroutine ttbb |
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| 57 | subroutine ttbb_gauss(track,ktrack,fk) |
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| 58 | |
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| 59 | use bbfi |
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| 60 | implicit none |
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| 61 | |
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| 62 | ! ---------------------------------------------------------------------* |
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| 63 | ! purpose: kicks the particles of the beam considered with a beam * |
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| 64 | ! having a Gaussian perpendicular shape * |
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| 65 | ! input and output as those of subroutine ttbb * |
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| 66 | ! ---------------------------------------------------------------------* |
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| 67 | logical bborbit |
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| 68 | integer ktrack,itrack,ipos,get_option |
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| 69 | double precision track(6,*),pi,sx,sy,xm,ym,sx2,sy2,xs, & |
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| 70 | ys,rho2,fk,tk,phix,phiy,rk,xb,yb,crx,cry,xr,yr,r,r2,cbx,cby, & |
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| 71 | get_variable,node_value,zero,one,two,three,ten3m,explim |
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| 72 | parameter(zero=0d0,one=1d0,two=2d0,three=3d0,ten3m=1d-3, & |
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| 73 | explim=150d0) |
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| 74 | ! if x > explim, exp(-x) is outside machine limits. |
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| 75 | |
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| 76 | !---- initialize. |
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| 77 | bborbit = get_option('bborbit ') .ne. 0 |
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| 78 | pi=get_variable('pi ') |
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| 79 | sx = node_value('sigx ') |
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| 80 | sy = node_value('sigy ') |
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| 81 | xm = node_value('xma ') |
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| 82 | ym = node_value('yma ') |
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| 83 | ipos = 0 |
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| 84 | if (.not. bborbit) then |
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| 85 | !--- find position of closed orbit bb_kick |
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| 86 | do ipos = 1, bbd_cnt |
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| 87 | if (bbd_loc(ipos) .eq. bbd_pos) goto 1 |
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| 88 | enddo |
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| 89 | ipos = 0 |
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| 90 | 1 continue |
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| 91 | endif |
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| 92 | sx2 = sx*sx |
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| 93 | sy2 = sy*sy |
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| 94 | !---- limit formulae for sigma(x) = sigma(y). |
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| 95 | if (abs(sx2 - sy2) .le. ten3m * (sx2 + sy2)) then |
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| 96 | do itrack = 1, ktrack |
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| 97 | xs = track(1,itrack) - xm |
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| 98 | ys = track(3,itrack) - ym |
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| 99 | rho2 = xs * xs + ys * ys |
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| 100 | tk = rho2 / (two * sx2) |
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| 101 | if (tk .gt. explim) then |
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| 102 | phix = xs * fk / rho2 |
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| 103 | phiy = ys * fk / rho2 |
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| 104 | else if (rho2 .ne. zero) then |
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| 105 | phix = xs * fk / rho2 * (one - exp(-tk) ) |
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| 106 | phiy = ys * fk / rho2 * (one - exp(-tk) ) |
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| 107 | else |
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| 108 | phix = zero |
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| 109 | phiy = zero |
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| 110 | endif |
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| 111 | if (ipos .ne. 0) then |
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| 112 | !--- subtract closed orbit kick |
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| 113 | phix = phix - bb_kick(1,ipos) |
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| 114 | phiy = phiy - bb_kick(2,ipos) |
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| 115 | endif |
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| 116 | track(2,itrack) = track(2,itrack) + phix |
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| 117 | track(4,itrack) = track(4,itrack) + phiy |
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| 118 | enddo |
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| 119 | |
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| 120 | !---- case sigma(x) > sigma(y). |
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| 121 | else if (sx2 .gt. sy2) then |
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| 122 | r2 = two * (sx2 - sy2) |
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| 123 | r = sqrt(r2) |
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| 124 | rk = fk * sqrt(pi) / r |
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| 125 | do itrack = 1, ktrack |
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| 126 | xs = track(1,itrack) - xm |
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| 127 | ys = track(3,itrack) - ym |
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| 128 | xr = abs(xs) / r |
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| 129 | yr = abs(ys) / r |
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| 130 | call ccperrf(xr, yr, crx, cry) |
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| 131 | tk = (xs * xs / sx2 + ys * ys / sy2) / two |
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| 132 | if (tk .gt. explim) then |
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| 133 | phix = rk * cry |
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| 134 | phiy = rk * crx |
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| 135 | else |
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| 136 | xb = (sy / sx) * xr |
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| 137 | yb = (sx / sy) * yr |
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| 138 | call ccperrf(xb, yb, cbx, cby) |
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| 139 | phix = rk * (cry - exp(-tk) * cby) |
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| 140 | phiy = rk * (crx - exp(-tk) * cbx) |
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| 141 | endif |
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| 142 | track(2,itrack) = track(2,itrack) + phix * sign(one,xs) |
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| 143 | track(4,itrack) = track(4,itrack) + phiy * sign(one,ys) |
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| 144 | if (ipos .ne. 0) then |
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| 145 | !--- subtract closed orbit kick |
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| 146 | track(2,itrack) = track(2,itrack) - bb_kick(1,ipos) |
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| 147 | track(4,itrack) = track(4,itrack) - bb_kick(2,ipos) |
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| 148 | endif |
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| 149 | enddo |
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| 150 | |
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| 151 | !---- case sigma(x) < sigma(y). |
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| 152 | else |
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| 153 | r2 = two * (sy2 - sx2) |
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| 154 | r = sqrt(r2) |
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| 155 | rk = fk * sqrt(pi) / r |
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| 156 | do itrack = 1, ktrack |
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| 157 | xs = track(1,itrack) - xm |
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| 158 | ys = track(3,itrack) - ym |
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| 159 | xr = abs(xs) / r |
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| 160 | yr = abs(ys) / r |
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| 161 | call ccperrf(yr, xr, cry, crx) |
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| 162 | tk = (xs * xs / sx2 + ys * ys / sy2) / two |
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| 163 | if (tk .gt. explim) then |
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| 164 | phix = rk * cry |
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| 165 | phiy = rk * crx |
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| 166 | else |
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| 167 | xb = (sy / sx) * xr |
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| 168 | yb = (sx / sy) * yr |
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| 169 | call ccperrf(yb, xb, cby, cbx) |
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| 170 | phix = rk * (cry - exp(-tk) * cby) |
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| 171 | phiy = rk * (crx - exp(-tk) * cbx) |
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| 172 | endif |
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| 173 | track(2,itrack) = track(2,itrack) + phix * sign(one,xs) |
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| 174 | track(4,itrack) = track(4,itrack) + phiy * sign(one,ys) |
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| 175 | if (ipos .ne. 0) then |
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| 176 | !--- subtract closed orbit kick |
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| 177 | track(2,itrack) = track(2,itrack) - bb_kick(1,ipos) |
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| 178 | track(4,itrack) = track(4,itrack) - bb_kick(2,ipos) |
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| 179 | endif |
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| 180 | enddo |
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| 181 | endif |
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| 182 | end subroutine ttbb_gauss |
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| 183 | subroutine ttbb_flattop(track,ktrack,fk) |
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| 184 | |
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| 185 | use bbfi |
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| 186 | implicit none |
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| 187 | |
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| 188 | ! ---------------------------------------------------------------------* |
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| 189 | ! purpose: kicks the particles of the beam considered with a beam * |
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| 190 | ! having an trapezoidal and, so flat top radial profile * |
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| 191 | ! input and output as those of subroutine ttbb * |
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| 192 | ! ---------------------------------------------------------------------* |
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| 193 | logical bborbit,first |
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| 194 | integer ktrack,itrack,ipos,get_option |
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| 195 | double precision track(6,*),pi,r0x,r0y,wi,wx,wy,xm,ym, & |
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| 196 | r0x2,r0y2,xs,ys,rho,rho2,fk,phir,phix,phiy,get_variable, & |
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| 197 | node_value,zero,one,two,three,ten3m,explim,norm,r1,zz |
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| 198 | parameter(zero=0d0,one=1d0,two=2d0,three=3d0,ten3m=1d-3, & |
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| 199 | explim=150d0) |
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| 200 | save first |
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| 201 | data first / .true. / |
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| 202 | ! if x > explim, exp(-x) is outside machine limits. |
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| 203 | |
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| 204 | !---- initialize. |
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| 205 | bborbit = get_option('bborbit ') .ne. 0 |
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| 206 | pi=get_variable('pi ') |
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| 207 | ! mean radii of the is given via variables sigx and sigy |
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| 208 | r0x = node_value('sigx ') |
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| 209 | r0y = node_value('sigy ') |
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| 210 | wi = node_value('width ') |
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| 211 | xm = node_value('xma ') |
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| 212 | ym = node_value('yma ') |
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| 213 | ipos = 0 |
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| 214 | if (.not. bborbit) then |
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| 215 | !--- find position of closed orbit bb_kick |
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| 216 | do ipos = 1, bbd_cnt |
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| 217 | if (bbd_loc(ipos) .eq. bbd_pos) goto 1 |
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| 218 | enddo |
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| 219 | ipos = 0 |
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| 220 | 1 continue |
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| 221 | endif |
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| 222 | r0x2 = r0x*r0x |
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| 223 | r0y2 = r0y*r0y |
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| 224 | wx = r0x*wi |
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| 225 | wy = r0y*wi |
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| 226 | !---- limit formulae for mean radius(x) = mean radius(y), |
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| 227 | !----- preliminary the only case considered. |
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| 228 | ! |
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| 229 | if (abs(r0x2 - r0y2) .gt. ten3m * (r0x2 + r0y2)) then |
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| 230 | zz = 0.5*(r0x + r0y) |
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| 231 | r0x=zz |
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| 232 | r0y=zz |
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| 233 | r0x2=r0x*r0x |
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| 234 | r0y2=r0y*r0y |
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| 235 | if(first) then |
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| 236 | first=.false. |
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| 237 | call aawarn('TTBB_FLATTOP: ','beam is assumed to be circular') |
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| 238 | endif |
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| 239 | endif |
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| 240 | norm = (12.0*r0x**2 + wx**2)/24.0 |
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| 241 | r1=r0x-wx/2.0 |
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| 242 | do itrack = 1, ktrack |
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| 243 | xs = track(1,itrack) - xm |
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| 244 | ys = track(3,itrack) - ym |
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| 245 | rho2 = xs * xs + ys * ys |
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| 246 | rho = sqrt(rho2) |
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| 247 | if(rho.le.r1) then |
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| 248 | phir = 0.5/norm |
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| 249 | phix = phir*xs |
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| 250 | phiy = phir*ys |
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| 251 | else if(rho.gt.r1.and.rho.lt.r1+wx) then |
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| 252 | phir = ((r0x**2/4.0 - r0x**3/6.0/wx - r0x*wx/8.0 + & |
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| 253 | wx**2/48.0)/rho2 + 0.25 + 0.5*r0x/wx - & |
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| 254 | rho/3.0/wx)/norm |
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| 255 | phix = phir*xs |
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| 256 | phiy = phir*ys |
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| 257 | else if(rho.ge.r1+wx) then |
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| 258 | phir = 1.0/rho2 |
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| 259 | phix = xs*phir |
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| 260 | phiy = ys*phir |
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| 261 | endif |
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| 262 | track(2,itrack) = track(2,itrack)+phix*fk |
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| 263 | track(4,itrack) = track(4,itrack)+phiy*fk |
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| 264 | end do |
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| 265 | |
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| 266 | end subroutine ttbb_flattop |
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| 267 | subroutine ttbb_hollowparabolic(track,ktrack,fk) |
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| 268 | |
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| 269 | use bbfi |
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| 270 | implicit none |
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| 271 | |
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| 272 | ! ---------------------------------------------------------------------* |
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| 273 | ! purpose: kicks the particles of the beam considered with a beam * |
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| 274 | ! having a hollow-parabolic perpendicular shape * |
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| 275 | ! input and output as those of subroutine ttbb * |
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| 276 | ! ---------------------------------------------------------------------* |
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| 277 | logical bborbit,first |
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| 278 | integer ktrack,itrack,ipos,get_option |
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| 279 | double precision track(6,*),pi,r0x,r0y,wi,wx,wy,xm,ym, & |
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| 280 | r0x2,r0y2,xs,ys,rho,rho2,fk,phir,phix,phiy,get_variable, & |
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| 281 | node_value,zero,one,two,three,ten3m,explim,zz |
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| 282 | parameter(zero=0d0,one=1d0,two=2d0,three=3d0,ten3m=1d-3, & |
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| 283 | explim=150d0) |
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| 284 | save first |
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| 285 | data first / .true. / |
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| 286 | ! if x > explim, exp(-x) is outside machine limits. |
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| 287 | |
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| 288 | !---- initialize. |
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| 289 | bborbit = get_option('bborbit ') .ne. 0 |
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| 290 | pi=get_variable('pi ') |
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| 291 | ! mean radii of the is given via variables sigx and sigy |
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| 292 | r0x = node_value('sigx ') |
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| 293 | r0y = node_value('sigy ') |
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| 294 | wi = node_value('width ') |
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| 295 | ! width is given as FWHM of parabolic density profile, but formulas were |
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| 296 | ! derived with half width at the bottom of the parabolic density profile |
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| 297 | wi = wi/sqrt(2.0) |
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| 298 | xm = node_value('xma ') |
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| 299 | ym = node_value('yma ') |
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| 300 | ipos = 0 |
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| 301 | if (.not. bborbit) then |
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| 302 | !--- find position of closed orbit bb_kick |
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| 303 | do ipos = 1, bbd_cnt |
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| 304 | if (bbd_loc(ipos) .eq. bbd_pos) goto 1 |
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| 305 | enddo |
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| 306 | ipos = 0 |
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| 307 | 1 continue |
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| 308 | endif |
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| 309 | r0x2 = r0x*r0x |
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| 310 | r0y2 = r0y*r0y |
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| 311 | wx = wi*r0x |
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| 312 | wy = wi*r0y |
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| 313 | !---- limit formulae for mean radius(x) = mean radius(y), |
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| 314 | !----- preliminary the only case considered. |
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| 315 | ! |
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| 316 | if (abs(r0x2 - r0y2) .gt. ten3m * (r0x2 + r0y2)) then |
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| 317 | zz = 0.5*(r0x + r0y) |
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| 318 | r0x=zz |
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| 319 | r0y=zz |
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| 320 | r0x2=r0x*r0x |
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| 321 | r0y2=r0y*r0y |
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| 322 | if(first) then |
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| 323 | first=.false. |
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| 324 | call aawarn('TTBB_HOLLOWPARABOLIC: ', & |
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| 325 | 'beam is assumed to be circular') |
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| 326 | endif |
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| 327 | endif |
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| 328 | do itrack = 1, ktrack |
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| 329 | xs = track(1,itrack) - xm |
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| 330 | ys = track(3,itrack) - ym |
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| 331 | rho2 = xs * xs + ys * ys |
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| 332 | rho = sqrt(rho2) |
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| 333 | if(rho.le.r0x-wx) then |
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| 334 | phix = zero |
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| 335 | phiy = zero |
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| 336 | else if(rho.gt.r0x-wx.and.rho.lt.r0x+wx) then |
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| 337 | phir=0.75/wx/r0x/rho2*(r0x**4/12.0/wx**2 - r0x**2/2.0 + & |
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| 338 | 2.0*r0x*wx/3.0 - wx**2/4.0 + rho2/2.0*(1.0 - & |
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| 339 | r0x**2/wx**2) + rho**3/3.0*2.0*r0x/wx**2 - & |
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| 340 | rho**4/4.0/wx**2) |
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| 341 | phix = phir*xs |
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| 342 | phiy = phir*ys |
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| 343 | else |
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| 344 | phir = 1.0/rho2 |
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| 345 | phix = xs*phir |
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| 346 | phiy = ys*phir |
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| 347 | endif |
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| 348 | track(2,itrack) = track(2,itrack)+phix*fk |
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| 349 | track(4,itrack) = track(4,itrack)+phiy*fk |
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| 350 | end do |
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| 351 | |
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| 352 | end subroutine ttbb_hollowparabolic |
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| 353 | !!$subroutine ttbb_old(track,ktrack,parvec) |
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| 354 | !!$ |
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| 355 | !!$ use bbfi |
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| 356 | !!$ implicit none |
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| 357 | !!$ |
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| 358 | !!$ !----------------------------------------------------------------------* |
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| 359 | !!$ ! purpose: * |
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| 360 | !!$ ! track a set of particle through a beam-beam interaction region. * |
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| 361 | !!$ ! see mad physicist's manual for the formulas used. * |
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| 362 | !!$ !input: * |
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| 363 | !!$ ! input/output: * |
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| 364 | !!$ ! track(6,*)(double) track coordinates: (x, px, y, py, t, pt). * |
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| 365 | !!$ ! ktrack (integer) number of tracks. * |
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| 366 | !!$ !----------------------------------------------------------------------* |
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| 367 | !!$ logical bborbit |
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| 368 | !!$ integer ktrack,itrack,ipos,get_option |
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| 369 | !!$ double precision track(6,*),parvec(*),pi,sx,sy,xm,ym,sx2,sy2,xs, & |
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| 370 | !!$ ys,rho2,fk,tk,phix,phiy,rk,xb,yb,crx,cry,xr,yr,r,r2,cbx,cby, & |
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| 371 | !!$ get_variable,node_value,zero,one,two,three,ten3m,explim |
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| 372 | !!$ parameter(zero=0d0,one=1d0,two=2d0,three=3d0,ten3m=1d-3, & |
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| 373 | !!$ explim=150d0) |
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| 374 | !!$ ! if x > explim, exp(-x) is outside machine limits. |
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| 375 | !!$ |
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| 376 | !!$ !---- initialize. |
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| 377 | !!$ bborbit = get_option('bborbit ') .ne. 0 |
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| 378 | !!$ pi=get_variable('pi ') |
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| 379 | !!$ sx = node_value('sigx ') |
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| 380 | !!$ sy = node_value('sigy ') |
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| 381 | !!$ xm = node_value('xma ') |
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| 382 | !!$ ym = node_value('yma ') |
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| 383 | !!$ fk = two * parvec(5) * parvec(6) / parvec(7) |
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| 384 | !!$ if (fk .eq. zero) return |
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| 385 | !!$ ipos = 0 |
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| 386 | !!$ if (.not. bborbit) then |
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| 387 | !!$ !--- find position of closed orbit bb_kick |
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| 388 | !!$ do ipos = 1, bbd_cnt |
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| 389 | !!$ if (bbd_loc(ipos) .eq. bbd_pos) goto 1 |
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| 390 | !!$ enddo |
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| 391 | !!$ ipos = 0 |
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| 392 | !!$1 continue |
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| 393 | !!$ endif |
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| 394 | !!$ sx2 = sx*sx |
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| 395 | !!$ sy2 = sy*sy |
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| 396 | !!$ !---- limit formulae for sigma(x) = sigma(y). |
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| 397 | !!$ if (abs(sx2 - sy2) .le. ten3m * (sx2 + sy2)) then |
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| 398 | !!$ do itrack = 1, ktrack |
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| 399 | !!$ xs = track(1,itrack) - xm |
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| 400 | !!$ ys = track(3,itrack) - ym |
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| 401 | !!$ rho2 = xs * xs + ys * ys |
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| 402 | !!$ tk = rho2 / (two * sx2) |
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| 403 | !!$ if (tk .gt. explim) then |
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| 404 | !!$ phix = xs * fk / rho2 |
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| 405 | !!$ phiy = ys * fk / rho2 |
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| 406 | !!$ else if (rho2 .ne. zero) then |
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| 407 | !!$ phix = xs * fk / rho2 * (one - exp(-tk) ) |
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| 408 | !!$ phiy = ys * fk / rho2 * (one - exp(-tk) ) |
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| 409 | !!$ else |
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| 410 | !!$ phix = zero |
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| 411 | !!$ phiy = zero |
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| 412 | !!$ endif |
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| 413 | !!$ if (ipos .ne. 0) then |
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| 414 | !!$ !--- subtract closed orbit kick |
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| 415 | !!$ phix = phix - bb_kick(1,ipos) |
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| 416 | !!$ phiy = phiy - bb_kick(2,ipos) |
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| 417 | !!$ endif |
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| 418 | !!$ track(2,itrack) = track(2,itrack) + phix |
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| 419 | !!$ track(4,itrack) = track(4,itrack) + phiy |
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| 420 | !!$ enddo |
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| 421 | !!$ |
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| 422 | !!$ !---- case sigma(x) > sigma(y). |
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| 423 | !!$ else if (sx2 .gt. sy2) then |
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| 424 | !!$ r2 = two * (sx2 - sy2) |
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| 425 | !!$ r = sqrt(r2) |
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| 426 | !!$ rk = fk * sqrt(pi) / r |
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| 427 | !!$ do itrack = 1, ktrack |
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| 428 | !!$ xs = track(1,itrack) - xm |
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| 429 | !!$ ys = track(3,itrack) - ym |
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| 430 | !!$ xr = abs(xs) / r |
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| 431 | !!$ yr = abs(ys) / r |
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| 432 | !!$ call ccperrf(xr, yr, crx, cry) |
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| 433 | !!$ tk = (xs * xs / sx2 + ys * ys / sy2) / two |
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| 434 | !!$ if (tk .gt. explim) then |
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| 435 | !!$ phix = rk * cry |
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| 436 | !!$ phiy = rk * crx |
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| 437 | !!$ else |
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| 438 | !!$ xb = (sy / sx) * xr |
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| 439 | !!$ yb = (sx / sy) * yr |
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| 440 | !!$ call ccperrf(xb, yb, cbx, cby) |
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| 441 | !!$ phix = rk * (cry - exp(-tk) * cby) |
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| 442 | !!$ phiy = rk * (crx - exp(-tk) * cbx) |
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| 443 | !!$ endif |
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| 444 | !!$ track(2,itrack) = track(2,itrack) + phix * sign(one,xs) |
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| 445 | !!$ track(4,itrack) = track(4,itrack) + phiy * sign(one,ys) |
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| 446 | !!$ if (ipos .ne. 0) then |
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| 447 | !!$ !--- subtract closed orbit kick |
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| 448 | !!$ track(2,itrack) = track(2,itrack) - bb_kick(1,ipos) |
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| 449 | !!$ track(4,itrack) = track(4,itrack) - bb_kick(2,ipos) |
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| 450 | !!$ endif |
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| 451 | !!$ enddo |
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| 452 | !!$ |
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| 453 | !!$ !---- case sigma(x) < sigma(y). |
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| 454 | !!$ else |
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| 455 | !!$ r2 = two * (sy2 - sx2) |
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| 456 | !!$ r = sqrt(r2) |
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| 457 | !!$ rk = fk * sqrt(pi) / r |
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| 458 | !!$ do itrack = 1, ktrack |
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| 459 | !!$ xs = track(1,itrack) - xm |
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| 460 | !!$ ys = track(3,itrack) - ym |
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| 461 | !!$ xr = abs(xs) / r |
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| 462 | !!$ yr = abs(ys) / r |
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| 463 | !!$ call ccperrf(yr, xr, cry, crx) |
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| 464 | !!$ tk = (xs * xs / sx2 + ys * ys / sy2) / two |
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| 465 | !!$ if (tk .gt. explim) then |
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| 466 | !!$ phix = rk * cry |
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| 467 | !!$ phiy = rk * crx |
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| 468 | !!$ else |
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| 469 | !!$ xb = (sy / sx) * xr |
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| 470 | !!$ yb = (sx / sy) * yr |
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| 471 | !!$ call ccperrf(yb, xb, cby, cbx) |
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| 472 | !!$ phix = rk * (cry - exp(-tk) * cby) |
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| 473 | !!$ phiy = rk * (crx - exp(-tk) * cbx) |
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| 474 | !!$ endif |
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| 475 | !!$ track(2,itrack) = track(2,itrack) + phix * sign(one,xs) |
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| 476 | !!$ track(4,itrack) = track(4,itrack) + phiy * sign(one,ys) |
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| 477 | !!$ if (ipos .ne. 0) then |
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| 478 | !!$ !--- subtract closed orbit kick |
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| 479 | !!$ track(2,itrack) = track(2,itrack) - bb_kick(1,ipos) |
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| 480 | !!$ track(4,itrack) = track(4,itrack) - bb_kick(2,ipos) |
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| 481 | !!$ endif |
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| 482 | !!$ enddo |
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| 483 | !!$ endif |
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| 484 | !!$end subroutine ttbb_old |
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