1 | // %%%%%%%%%%%%% |
---|
2 | // gemc headers |
---|
3 | // %%%%%%%%%%%%% |
---|
4 | #include "bst_strip.h" |
---|
5 | |
---|
6 | #include <iostream> |
---|
7 | #include <cmath> |
---|
8 | #include <cstdlib> |
---|
9 | |
---|
10 | void bst_strip::fill_infos() |
---|
11 | { |
---|
12 | // all dimensions are in mm |
---|
13 | |
---|
14 | Pi = 3.14159265358; |
---|
15 | interlayer = 2.75; // distance between 2 layers of a superlayer |
---|
16 | |
---|
17 | alpha = 1.5*Pi/180; // angle of the strips |
---|
18 | pitch = 0.150; // pitch of the strips |
---|
19 | |
---|
20 | // number of sectors for each layer |
---|
21 | Nsector.push_back(8); Nsector.push_back(8); |
---|
22 | Nsector.push_back(12); Nsector.push_back(12); |
---|
23 | Nsector.push_back(18); Nsector.push_back(18); |
---|
24 | Nsector.push_back(24); Nsector.push_back(24); |
---|
25 | |
---|
26 | // number of cards by sector for each layer |
---|
27 | Ncards.push_back(1); Ncards.push_back(1); |
---|
28 | Ncards.push_back(2); Ncards.push_back(2); |
---|
29 | Ncards.push_back(3); Ncards.push_back(3); |
---|
30 | Ncards.push_back(3); Ncards.push_back(3); |
---|
31 | |
---|
32 | // z of the upstream part of the layer |
---|
33 | Z0.push_back(-39.219); Z0.push_back(-39.219); |
---|
34 | Z0.push_back(-111.319); Z0.push_back(-111.319); |
---|
35 | Z0.push_back(-164.787); Z0.push_back(-164.787); |
---|
36 | Z0.push_back(-107.070); Z0.push_back(-107.070); |
---|
37 | |
---|
38 | // radii of layers |
---|
39 | R.push_back(101.129/2); R.push_back(R[0]+interlayer); |
---|
40 | R.push_back(156.853/2); R.push_back(R[2]+interlayer); |
---|
41 | R.push_back(238.869/2); R.push_back(R[4]+interlayer); |
---|
42 | R.push_back(320.268/2); R.push_back(R[6]+interlayer); |
---|
43 | |
---|
44 | // mid angle of the sector |
---|
45 | MidTile.push_back(0); MidTile.push_back(0); |
---|
46 | MidTile.push_back(0); MidTile.push_back(0); |
---|
47 | MidTile.push_back(Pi/18); MidTile.push_back(Pi/18); |
---|
48 | MidTile.push_back(0); MidTile.push_back(0); |
---|
49 | |
---|
50 | |
---|
51 | DZ_inLength = 0.934; // size of the band of dead zones all around in the length of the card |
---|
52 | DZ_inWidth = 0.934; // size of the band of dead zones all around in the width of the card |
---|
53 | CardLength = 111.625; // length of 1 card |
---|
54 | CardWidth = 41.7; // width 1 card |
---|
55 | |
---|
56 | // Number of strips |
---|
57 | NstripsZ = (int) floor((CardWidth-2.0*DZ_inLength-(CardLength-2*DZ_inWidth)*tan(alpha))*cos(alpha)/pitch); |
---|
58 | Nstrips = (int) floor((CardWidth-2.0*DZ_inLength)/pitch); |
---|
59 | |
---|
60 | } |
---|
61 | |
---|
62 | |
---|
63 | void bst_strip::FindCard(int layer, double Z) |
---|
64 | { |
---|
65 | if(Z>Z0[layer] && Z<Z0[layer]+Ncards[layer]*CardLength) |
---|
66 | { |
---|
67 | // get the card index |
---|
68 | nCard = (int) floor((Z-Z0[layer])/CardLength); |
---|
69 | |
---|
70 | // redefine z to the global coordinate on the first card. |
---|
71 | // If it's the middle card z becomes the distance to the right edge. |
---|
72 | if((nCard%2)==0) z = Z - nCard*CardLength; |
---|
73 | if((nCard%2)==1) z = Z0[layer] + (nCard+1)*CardLength - Z + Z0[layer]; |
---|
74 | |
---|
75 | // now hit is in the 1st card of the tile! let's check it |
---|
76 | if(z<Z0[layer] || z>Z0[layer]+CardLength) |
---|
77 | { |
---|
78 | cout << " Warning: z not within first card. This should never happen! z = " << z << ", card = " << nCard << endl; |
---|
79 | exit(0); |
---|
80 | } |
---|
81 | } |
---|
82 | } |
---|
83 | |
---|
84 | |
---|
85 | int bst_strip::FindStripZ(int layer, int sector, double X, double Y) |
---|
86 | { |
---|
87 | x = X; |
---|
88 | y = Y; |
---|
89 | |
---|
90 | double mindist = 999.; // min distance between the points and strips |
---|
91 | double dist = 999.; // distance to current strip |
---|
92 | int ClosestStrip = -1; // number of the closest strip |
---|
93 | |
---|
94 | int IsOK = 0; |
---|
95 | const int MAXNSTRIP = 1024; |
---|
96 | if(NstripsZ > MAXNSTRIP) |
---|
97 | { |
---|
98 | cout << " Warning: number of strips > 1024. Exiting. " << endl; |
---|
99 | exit(0); |
---|
100 | } |
---|
101 | |
---|
102 | double Px[MAXNSTRIP], Py[MAXNSTRIP], Pz[MAXNSTRIP]; |
---|
103 | double Pxp[MAXNSTRIP], Pyp[MAXNSTRIP], Pzp[MAXNSTRIP]; |
---|
104 | |
---|
105 | |
---|
106 | for(int k=0; k<NstripsZ; k++) |
---|
107 | { |
---|
108 | Px[k] = (R[layer]/cos(0.5*(CardWidth/R[layer])))*cos(MidTile[layer] + |
---|
109 | 2.0*sector*Pi/Nsector[layer] + 0.5*CardWidth/R[layer]) + DZ_inLength*sin(MidTile[layer] + |
---|
110 | 2.0*sector*Pi/Nsector[layer]) + (pitch*k/cos(alpha))*sin(MidTile[layer] + |
---|
111 | 2.0*sector*Pi/Nsector[layer]); |
---|
112 | Py[k] = (R[layer]/cos(0.5*(CardWidth/R[layer])))*sin(MidTile[layer] + |
---|
113 | 2.0*sector*Pi/Nsector[layer] + 0.5*CardWidth/R[layer]) - DZ_inLength*cos(MidTile[layer] + |
---|
114 | 2.0*sector*Pi/Nsector[layer]) - (pitch*k/cos(alpha))*cos(MidTile[layer] + |
---|
115 | 2.0*sector*Pi/Nsector[layer]); |
---|
116 | Pz[k] = Z0[layer]+DZ_inWidth; |
---|
117 | |
---|
118 | |
---|
119 | Pxp[k] = (R[layer]/cos(0.5*(CardWidth/R[layer])))*cos(MidTile[layer] |
---|
120 | + 2.0*sector*Pi/Nsector[layer] - 0.5*CardWidth/R[layer])-DZ_inLength*sin(MidTile[layer] |
---|
121 | + 2.0*sector*Pi/Nsector[layer]) - (pitch*k/cos(alpha))*sin(MidTile[layer] |
---|
122 | + 2.0*sector*Pi/Nsector[layer]); |
---|
123 | Pyp[k] = (R[layer]/cos(0.5*(CardWidth/R[layer])))*sin(MidTile[layer] |
---|
124 | + 2.0*sector*Pi/Nsector[layer] - 0.5*CardWidth/R[layer])+DZ_inLength*cos(MidTile[layer] |
---|
125 | + 2.0*sector*Pi/Nsector[layer]) + (pitch*k/cos(alpha))*cos(MidTile[layer] |
---|
126 | + 2.0*sector*Pi/Nsector[layer]); |
---|
127 | Pzp[k] = Z0[layer]+DZ_inWidth; |
---|
128 | |
---|
129 | // W layer |
---|
130 | if((layer%2)==0) |
---|
131 | { |
---|
132 | dist = fabs( - sin(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(alpha)*x |
---|
133 | + cos(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(alpha)*y |
---|
134 | + sin(alpha)*z |
---|
135 | + sin(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(alpha)*Px[k] |
---|
136 | - cos(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(alpha)*Py[k] |
---|
137 | - sin(alpha)*Pz[k]); |
---|
138 | |
---|
139 | if(dist<mindist) |
---|
140 | { |
---|
141 | mindist = dist; |
---|
142 | ClosestStrip = k; |
---|
143 | } |
---|
144 | } |
---|
145 | |
---|
146 | // V layer |
---|
147 | if((layer%2)==1) |
---|
148 | { |
---|
149 | dist = fabs( - sin(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(-alpha)*x |
---|
150 | + cos(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(-alpha)*y |
---|
151 | + sin(-alpha)*z |
---|
152 | + sin(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(-alpha)*Pxp[k] |
---|
153 | - cos(MidTile[layer] + sector*2.0*Pi/Nsector[layer])*cos(-alpha)*Pyp[k] |
---|
154 | - sin(-alpha)*Pzp[k]); |
---|
155 | |
---|
156 | if(dist<mindist) |
---|
157 | { |
---|
158 | mindist = dist; |
---|
159 | ClosestStrip = k; |
---|
160 | } |
---|
161 | } |
---|
162 | } |
---|
163 | if(mindist<pitch/2. && z>Z0[layer]+DZ_inWidth && z<Z0[layer]+CardLength-DZ_inWidth) IsOK = 1; |
---|
164 | else IsOK = 0; |
---|
165 | |
---|
166 | if(IsOK) return ClosestStrip; |
---|
167 | else return -1; |
---|
168 | |
---|
169 | } |
---|
170 | |
---|
171 | |
---|
172 | |
---|
173 | int bst_strip::FindStrip(int layer, int sector, double X, double Y, double Z) |
---|
174 | { |
---|
175 | x = X; |
---|
176 | y = Y; |
---|
177 | z = Z; |
---|
178 | |
---|
179 | double mindist = 999.; // min distance between the points and strips |
---|
180 | double dist = 999.; // distance to current strip |
---|
181 | int ClosestStrip = -1; // number of the closest strip |
---|
182 | int IsOK = 0; |
---|
183 | const int MAXNSTRIP = 1024; |
---|
184 | |
---|
185 | if(Nstrips > MAXNSTRIP) |
---|
186 | { |
---|
187 | cout << " Warning: number of strips > 1024. Exiting. " << endl; |
---|
188 | exit(0); |
---|
189 | } |
---|
190 | |
---|
191 | double Px[MAXNSTRIP], Py[MAXNSTRIP], Pz[MAXNSTRIP]; |
---|
192 | double Pxp[MAXNSTRIP], Pyp[MAXNSTRIP], Pzp[MAXNSTRIP]; |
---|
193 | double alpha_k; |
---|
194 | |
---|
195 | // particle is in the z-acceptance |
---|
196 | if(z>Z0[layer]+DZ_inWidth && z<Z0[layer]+Ncards[layer]*CardLength-DZ_inWidth) |
---|
197 | { |
---|
198 | |
---|
199 | for(int k=0; k<Nstrips; k++) |
---|
200 | { |
---|
201 | alpha_k = k/((float)(Nstrips-1))*alpha; |
---|
202 | Px[k] = (R[layer]/cos(atan(0.5*(CardWidth/R[layer]))))*cos(MidTile[layer] + |
---|
203 | 2.0*sector*Pi/Nsector[layer]+atan(0.5*CardWidth/R[layer]))+DZ_inLength*sin(MidTile[layer] + |
---|
204 | 2.0*sector*Pi/Nsector[layer])+(pitch*k)*sin(MidTile[layer]+sector*2.0*Pi/Nsector[layer]); |
---|
205 | Py[k] = (R[layer]/cos(atan(0.5*(CardWidth/R[layer]))))*sin(MidTile[layer] + |
---|
206 | 2.0*sector*Pi/Nsector[layer]+atan(0.5*CardWidth/R[layer]))-DZ_inLength*cos(MidTile[layer] + |
---|
207 | 2.0*sector*Pi/Nsector[layer])-(pitch*k)*cos(MidTile[layer]+sector*2.*Pi/Nsector[layer]); |
---|
208 | Pz[k] = Z0[layer]+DZ_inWidth; |
---|
209 | |
---|
210 | Pxp[k] = (R[layer]/cos(atan(0.5*(CardWidth/R[layer]))))*cos(MidTile[layer] + |
---|
211 | 2.0*sector*Pi/Nsector[layer]-atan(0.5*CardWidth/R[layer]))-DZ_inLength*sin(MidTile[layer] + |
---|
212 | 2.0*sector*Pi/Nsector[layer])-(pitch*k)*sin(MidTile[layer]+sector*2.*Pi/Nsector[layer]); |
---|
213 | Pyp[k] = (R[layer]/cos(atan(0.5*(CardWidth/R[layer]))))*sin(MidTile[layer] + |
---|
214 | 2.0*sector*Pi/Nsector[layer]-atan(0.5*CardWidth/R[layer]))+DZ_inLength*cos(MidTile[layer] + |
---|
215 | 2.0*sector*Pi/Nsector[layer])+(pitch*k)*cos(MidTile[layer]+sector*2.*Pi/Nsector[layer]); |
---|
216 | Pzp[k] = Z0[layer]+DZ_inWidth; |
---|
217 | |
---|
218 | if((layer%2)==0) |
---|
219 | { |
---|
220 | dist = fabs(-sin(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(alpha_k)*x + |
---|
221 | cos(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(alpha_k)*y + |
---|
222 | sin(alpha_k)*z + |
---|
223 | sin(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(alpha_k)*Px[k] - |
---|
224 | cos(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(alpha_k)*Py[k] - |
---|
225 | sin(alpha_k)*Pz[k]); |
---|
226 | if(dist<mindist) |
---|
227 | { |
---|
228 | mindist = dist; |
---|
229 | ClosestStrip = k; // record strip number |
---|
230 | } |
---|
231 | } |
---|
232 | |
---|
233 | if((layer%2)==1) |
---|
234 | { |
---|
235 | dist = fabs(-sin(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(-alpha_k)*x + |
---|
236 | cos(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(-alpha_k)*y + |
---|
237 | sin(-alpha_k)*z + |
---|
238 | sin(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(-alpha_k)*Pxp[k] - |
---|
239 | cos(MidTile[layer]+sector*2.0*Pi/Nsector[layer])*cos(-alpha_k)*Pyp[k] - |
---|
240 | sin(-alpha_k)*Pzp[k]); |
---|
241 | if(dist<mindist) |
---|
242 | { |
---|
243 | mindist = dist; |
---|
244 | ClosestStrip = k; // record strip number |
---|
245 | } |
---|
246 | } |
---|
247 | } |
---|
248 | if(mindist < (pitch+(Ncards[layer]*CardLength-2.*DZ_inWidth)*alpha/(Nstrips-1)*(1.+tan(alpha)*tan(alpha)))/2. && |
---|
249 | z>Z0[layer]+DZ_inWidth && |
---|
250 | z<Z0[layer]+Ncards[layer]*CardLength-DZ_inWidth && |
---|
251 | sqrt(x*x+y*y)<R[layer]/cos(atan((0.5*CardWidth-DZ_inLength)/R[layer]))) IsOK = 1; |
---|
252 | else IsOK = 0; |
---|
253 | } |
---|
254 | else |
---|
255 | { |
---|
256 | // particle not in the z-acceptance |
---|
257 | IsOK = 0; |
---|
258 | ClosestStrip = -1; |
---|
259 | } |
---|
260 | |
---|
261 | if(IsOK) return ClosestStrip; |
---|
262 | else return -1; |
---|
263 | |
---|
264 | } |
---|
265 | |
---|
266 | |
---|
267 | |
---|
268 | |
---|
269 | |
---|
270 | |
---|
271 | |
---|
272 | |
---|
273 | |
---|
274 | |
---|
275 | |
---|