source: PSPA/madxPSPA/tests/test-dynap/test-dynap.madx @ 430

Option, -echo,-info,-warn;

!call, file = "../share/LHC/LHCRing/V6.503/V6.5.thin.seq";
call, file = "../share/LHC/LHCRing/V6.503/V6.5.seq";
call, file = "../share/LHC/LHCRing/V6.503/toolkit/slice.madx";

Option, info,warn;

!+++++++++++++++++++++++++ Step 1 +++++++++++++++++++++++
!       define beam constants
!++++++++++++++++++++++++++++++++++++++++++++++++++++++++

b_t_dist = 25.e-9;                  !--- bunch distance in [sec]
b_h_dist = clight * b_t_dist / 2 ;  !--- bunch half-distance in [m]
ip1_range = 58.;                     ! range for parasitic collisions
ip5_range = ip1_range;
ip2_range = 60.;
ip8_range = ip2_range;

npara_1 = ip1_range / b_h_dist;     ! # parasitic either side
npara_2 = ip2_range / b_h_dist;
npara_5 = ip5_range / b_h_dist;
npara_8 = ip8_range / b_h_dist;

value,npara_1,npara_2,npara_5,npara_8;

eg   = 7000;
bg   = eg/pmass;
en   = 3.75e-06;
epsx = en/bg;
epsy = en/bg;

Beam, particle = proton, sequence=lhcb1, energy = eg,
          sigt=      0.077     , 
          bv = +1, NPART=1.1E11, sige=      1.1e-4, 
          ex=epsx,   ey=epsy;

Beam, particle = proton, sequence=lhcb2, energy = eg,
          sigt=      0.077     , 
          bv = -1, NPART=1.1E11, sige=      1.1e-4, 
          ex=epsx,   ey=epsy;

beamx = beam%lhcb1->ex;   beamy%lhcb1 = beam->ey;
sigz  = beam%lhcb1->sigt; sige = beam%lhcb1->sige;

!--- split5, 4d
long_a = 0.53 * sigz/2;
long_b = 1.40 * sigz/2;
value,long_a,long_b;

ho_charge = 0.2;

!+++++++++++++++++++++++++ Step 2 +++++++++++++++++++++++
!       slice, flatten sequence, and cycle start to ip3
!++++++++++++++++++++++++++++++++++++++++++++++++++++++++

use,sequence=lhcb1;
makethin,sequence=lhcb1;
use,sequence=lhcb2;
makethin,sequence=lhcb2;

option,-warn,-echo,-info;
call, file = "../share/LHC/LHCRing/V6.503/V6.5.thin.coll.str";
option,warn;

abas := 2.0*clight/(7e12)*on_atlas ;
abcs := 4.0*clight/(7e12)*on_cms ;

!on_x1:=1; on_sep1:=0; on_atlas  :=  1 ;
!on_x2:=1; on_sep2:=0; on_alice  :=  1 ;
!on_x5:=1; on_sep5:=0; on_cms    :=  1 ;
!on_x8:=1; on_sep8:=0; on_lhcb   :=  1 ;

! keep sextupoles
ksf0=ksf; ksd0=ksd;
use,period=lhcb1;
select,flag=twiss,column=name,x,y,betx,bety;
twiss,file="twiss-table-1";
!plot,haxis=s,vaxis=x,y,colour=100,noline;

use,period=lhcb2;
select,flag=twiss,column=name,x,y,betx,bety;
twiss,file="twiss-table-2";
!plot,haxis=s,vaxis=x,y,colour=100,noline;

seqedit,sequence=lhcb1;
flatten;
endedit;

seqedit,sequence=lhcb1;
cycle,start=ip3;
endedit;

seqedit,sequence=lhcb2;
flatten;
endedit;

seqedit,sequence=lhcb2;
cycle,start=ip3;
endedit;

bbmarker: marker;  /* for subsequent remove */


!+++++++++++++++++++++++++ Step 3 +++++++++++++++++++++++
!       define the beam-beam elements
!++++++++++++++++++++++++++++++++++++++++++++++++++++++++
!
!===========================================================
! read macro definitions
call,file="bb.macros";

!
!===========================================================
!   this sets CHARGE in the head-on beam-beam elements. 
!   set +1 * ho_charge   for parasitic on, 0 for off

 on_ho1  = +1 * ho_charge; ! ho_charge depends on split
 on_ho2  = +0 * ho_charge; ! because of the "by hand" splitting
 on_ho5  = +1 * ho_charge;
 on_ho8  = +0 * ho_charge;

!
!===========================================================
!   set CHARGE in the parasitic beam-beam elements. 
!   set +1 for parasitic on, 0 for off

 on_lr1l = +1;
 on_lr1r = +1;
 on_lr2l = +0;
 on_lr2r = +0;
 on_lr5l = +1;
 on_lr5r = +1;
 on_lr8l = +0;
 on_lr8r = +0;

!
!===========================================================
!   define markers and savebetas

option,echo;
assign,echo="temp.bb.install",truncate;

!--- ip1
if (on_ho1 <> 0)
{
  exec, mkho(1);
  exec, sbhomk(1);
}
if (on_lr1l <> 0 || on_lr1r <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, mkl(1,$n);
   exec, sbl(1,$n);
   n=n+1;
  };
}
if (on_lr1r <> 0 || on_lr1l <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, mkr(1,$n);
   exec, sbr(1,$n);
   n=n+1;
  };
}
!--- ip5
if (on_ho5 <> 0)
{
  exec, mkho(5);
  exec, sbhomk(5);
}
if (on_lr5l <> 0 || on_lr5r <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, mkl(5,$n);
   exec, sbl(5,$n);
   n=n+1;
  };
}
if (on_lr5r <> 0 || on_lr5l <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, mkr(5,$n);
   exec, sbr(5,$n);
   n=n+1;
  };
}
!--- ip2
if (on_ho2 <> 0)
{
  exec, mkho(2);
  exec, sbhomk(2);
}
if (on_lr2l <> 0 || on_lr2r <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, mkl(2,$n);
   exec, sbl(2,$n);
   n=n+1;
  };
}
if (on_lr2r <> 0 || on_lr2l <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, mkr(2,$n);
   exec, sbr(2,$n);
   n=n+1;
  };
}
!--- ip8
if (on_ho8 <> 0)
{
  exec, mkho(8);
  exec, sbhomk(8);
}
if (on_lr8l <> 0 || on_lr8r <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, mkl(8,$n);
   exec, sbl(8,$n);
   n=n+1;
  };
}
if (on_lr8r <> 0 || on_lr8l <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, mkr(8,$n);
   exec, sbr(8,$n);
   n=n+1;
  };
}

assign,echo=terminal;
call,file="temp.bb.install";

!
!===========================================================
!   install bb markers

assign,echo="temp.bb.install",truncate;

!--- ip1
if (on_ho1 <> 0)
{
exec, inho(mk,1);
}
if (on_lr1l <> 0 || on_lr1r <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, inl(mk,1,$n);
   n=n+1;
  };
}
if (on_lr1r <> 0 || on_lr1l <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, inr(mk,1,$n);
   n=n+1;
  };
}
!--- ip5
if (on_ho5 <> 0)
{
exec, inho(mk,5);
}
if (on_lr5l <> 0 || on_lr5r <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, inl(mk,5,$n);
   n=n+1;
  };
}
if (on_lr5r <> 0 || on_lr5l <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, inr(mk,5,$n);
   n=n+1;
  };
}
!--- ip2
if (on_ho2 <> 0)
{
exec, inho(mk,2);
}
if (on_lr2l <> 0 || on_lr2r <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, inl(mk,2,$n);
   n=n+1;
  };
}
if (on_lr2r <> 0 || on_lr2l <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, inr(mk,2,$n);
   n=n+1;
  };
}
!--- ip8
if (on_ho8 <> 0)
{
exec, inho(mk,8);
}
if (on_lr8l <> 0 || on_lr8r <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, inl(mk,8,$n);
   n=n+1;
  };
}
if (on_lr8r <> 0 || on_lr8l <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, inr(mk,8,$n);
   n=n+1;
  };
}

assign,echo=terminal;
seqedit,sequence=lhcb2;
call,file="temp.bb.install";
endedit;

!
!===========================================================
!--- get beta functions at bb in all four IPs
use,period=lhcb2;
select,flag=twiss,class=bbmarker,column=name,s,x,y;
twiss, sequence=lhcb2; !,file;
!--- separation for halo collisions at IP2
on_sep2 = 2.118 * sqrt(epsx * r2ip2->betx) / 0.0007999979093;
value,on_sep2;
!===========================================================
!   define bb elements

assign,echo="temp.bb.install",truncate;

!--- ip1
if (on_ho1 <> 0)
{
exec, bbho(1);
}
if (on_lr1l <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, bbl(1,$n);
   n=n+1;
  };
}
if (on_lr1r <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, bbr(1,$n);
   n=n+1;
  };
}
!--- ip5
if (on_ho5 <> 0)
{
exec, bbho(5);
}
if (on_lr5l <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, bbl(5,$n);
   n=n+1;
  };
}
if (on_lr5r <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, bbr(5,$n);
   n=n+1;
  };
}
!--- ip2
if (on_ho2 <> 0)
{
exec, bbho(2);
}
if (on_lr2l <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, bbl(2,$n);
   n=n+1;
  };
}
if (on_lr2r <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, bbr(2,$n);
   n=n+1;
  };
}
!--- ip8
if (on_ho8 <> 0)
{
exec, bbho(8);
}
if (on_lr8l <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, bbl(8,$n);
   n=n+1;
  };
}
if (on_lr8r <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, bbr(8,$n);
   n=n+1;
  };
}

assign,echo=terminal;
call,file="temp.bb.install";

!
!===========================================================
!   install bb elements

assign,echo="temp.bb.install",truncate;

!--- ip1
if (on_ho1 <> 0)
{
exec, inho(bb,1);
}
if (on_lr1l <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, inl(bb,1,$n);
   n=n+1;
  };
}
if (on_lr1r <> 0)
{
  n=1; ! counter
  while (n < npara_1)
  {
   exec, inr(bb,1,$n);
   n=n+1;
  };
}
!--- ip5
if (on_ho5 <> 0)
{
exec, inho(bb,5);
}
if (on_lr5l <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, inl(bb,5,$n);
   n=n+1;
  };
}
if (on_lr5r <> 0)
{
  n=1; ! counter
  while (n < npara_5)
  {
   exec, inr(bb,5,$n);
   n=n+1;
  };
}
!--- ip2
if (on_ho2 <> 0)
{
exec, inho(bb,2);
}
if (on_lr2l <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, inl(bb,2,$n);
   n=n+1;
  };
}
if (on_lr2r <> 0)
{
  n=1; ! counter
  while (n < npara_2)
  {
   exec, inr(bb,2,$n);
   n=n+1;
  };
}
!--- ip8
if (on_ho8 <> 0)
{
exec, inho(bb,8);
}
if (on_lr8l <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, inl(bb,8,$n);
   n=n+1;
  };
}
if (on_lr8r <> 0)
{
  n=1; ! counter
  while (n < npara_8)
  {
   exec, inr(bb,8,$n);
   n=n+1;
  };
}

assign,echo=terminal;
select,flag=seqedit,class=bbmarker;
seqedit,sequence=lhcb2;
remove,element=selected;
endedit;
select,flag=seqedit,clear;

seqedit,sequence=lhcb1;
call,file="temp.bb.install";
endedit;
removefile, file="temp.bb.install";

!--- Now the beam-beam element installation is complete

seqedit,sequence=lhcb1;
cycle,start=ip1;
endedit;

use,period=lhcb1;
!twiss, sequence=lhcb1;

!
!  make footprint
!

option,trace;
small=0.05;
big=sqrt(1.-small^2);
track;
xs=small; ys=small;
value,xs,ys;
start,fx=xs,fy=ys;  // zero amplitude
nsigmax=6;
n=1; // sigma multiplier
m=0; // angle multiplier
while (n <= nsigmax)
{
  angle = 15*m*pi/180;
  if (m == 0) {xs=n*big; ys=n*small;}
  elseif (m == 6) {xs=n*small; ys=n*big;}
  else
  {
    xs=n*cos(angle);
    ys=n*sin(angle);
  }
  value,xs,ys;
  start,fx=xs,fy=ys;
  m=m+1;
  if (m == 7) { m=0; n=n+1;}
};
dynap,fastune,turns=1024;
endtrack;
write,table=dynap,file;
write,table=dynaptune,file;
!system,"foot < dynaptune > footprint";
!stop;