1 | //Parent class for the collimators |
---|
2 | |
---|
3 | #include <iostream> |
---|
4 | #include <fstream> |
---|
5 | #include <sstream> |
---|
6 | #include <vector> |
---|
7 | #include <string> |
---|
8 | #include <cmath> |
---|
9 | #include "Collimator.h" |
---|
10 | using namespace std; |
---|
11 | |
---|
12 | Collimator::Collimator(const double& ALFX, const double& ALFY, const double& APER_1, const double& APER_2, const double& APER_3, const double& APER_4, const string& APERTYPE, const double& BETX, const double& BETY, const double& DPX, const double& DPY, const double& DX, const double& DY, const string& KEYWORD, const double& L, const double& MUX, const double& MUY, const string& NAME, const double& PTC, const double& PXC, const double& PYC, const double& S, const double& TC, const double& XC, const double& YC, const double& K0L, const double& K0SL, const double& K1L, const double& K1SL, const double& K2L, const double& K2SL, const string& PARENT, const string& meth, const long double& hgap, const long double& hgap2, const double& collang, const long double& pdepth, const long double& pdepth2, const double& tcang, const double& nsig) |
---|
13 | : Element(ALFX, ALFY, APER_1, APER_2, APER_3, APER_4, APERTYPE, BETX, BETY, DPX, DPY, DX, DY, KEYWORD, L, MUX, MUY, NAME, PTC, PXC, PYC, S, TC, XC, YC, K0L, K0SL, K1L, K1SL, K2L, K2SL, PARENT), |
---|
14 | method(meth), |
---|
15 | hgap(hgap), |
---|
16 | hgap2(hgap2), |
---|
17 | phi(collang), |
---|
18 | pdepth(pdepth), |
---|
19 | pdepth2(pdepth2), |
---|
20 | tcang(tcang), |
---|
21 | nsig(nsig) |
---|
22 | {}; |
---|
23 | |
---|
24 | Collimator::Collimator(const double& ALFX, const double& ALFY, const double& APER_1, const double& APER_2, const double& APER_3, const double& APER_4, const string& APERTYPE, const double& BETX, const double& BETY, const double& DPX, const double& DPY, const double& DX, const double& DY, const string& KEYWORD, const double& L, const double& MUX, const double& MUY, const string& NAME, const double& PTC, const double& PXC, const double& PYC, const double& S, const double& TC, const double& XC, const double& YC, const double& K0L, const double& K0SL, const double& K1L, const double& K1SL, const double& K2L, const double& K2SL, const string& PARENT, const string& meth, const long double& hgap, const long double& hgap2, const double& collang, const long double& pdepth, const long double& pdepth2, const double& tcang, const double& nsig, const long double& Bmax, const long double& thicknessMagneticField, const double& energyPerIon, const double& mass) |
---|
25 | : Element(ALFX, ALFY, APER_1, APER_2, APER_3, APER_4, APERTYPE, BETX, BETY, DPX, DPY, DX, DY, KEYWORD, L, MUX, MUY, NAME, PTC, PXC, PYC, S, TC, XC, YC, K0L, K0SL, K1L, K1SL, K2L, K2SL, PARENT), |
---|
26 | method(meth), |
---|
27 | hgap(hgap), |
---|
28 | hgap2(hgap2), |
---|
29 | phi(collang), |
---|
30 | pdepth(pdepth), |
---|
31 | pdepth2(pdepth2), |
---|
32 | tcang(tcang), |
---|
33 | nsig(nsig), |
---|
34 | Bmax(Bmax), |
---|
35 | thicknessMagneticField(thicknessMagneticField), |
---|
36 | energyPerIon(energyPerIon), |
---|
37 | mass(mass) |
---|
38 | {}; |
---|
39 | |
---|
40 | Collimator::Collimator(Element elt, const double& tcang, const double& nsig, const string& meth) |
---|
41 | : Element(elt), |
---|
42 | method(meth), |
---|
43 | tcang(tcang), |
---|
44 | nsig(nsig) |
---|
45 | {}; |
---|
46 | |
---|
47 | Collimator::Collimator(Element elt, const double& tcang, const double& nsig, const string& meth, const string& material) |
---|
48 | : Element(elt), |
---|
49 | method(meth), |
---|
50 | tcang(tcang), |
---|
51 | nsig(nsig), |
---|
52 | material(material) |
---|
53 | {}; |
---|
54 | |
---|
55 | Collimator::Collimator(const Collimator& obj) |
---|
56 | : Element(obj), |
---|
57 | method(obj.method), |
---|
58 | hgap(obj.hgap), |
---|
59 | hgap2(obj.hgap2), |
---|
60 | phi(obj.phi), |
---|
61 | pdepth(obj.pdepth), |
---|
62 | pdepth2(obj.pdepth2), |
---|
63 | tcang(obj.tcang), |
---|
64 | nsig(obj.nsig), |
---|
65 | material(obj.material), |
---|
66 | crossSectionPath(obj.crossSectionPath), |
---|
67 | Bmax(obj.Bmax), |
---|
68 | thicknessMagneticField(obj.thicknessMagneticField), |
---|
69 | energyPerIon(obj.energyPerIon), |
---|
70 | mass(obj.mass) |
---|
71 | {} |
---|
72 | |
---|
73 | |
---|
74 | void Collimator::affiche() |
---|
75 | { |
---|
76 | |
---|
77 | this->Element::affiche(); |
---|
78 | cout << "Method: " << method << endl; |
---|
79 | |
---|
80 | }; |
---|
81 | |
---|
82 | void Collimator::collipassInteraction(Particle& p1, double Apr, double Zpr, double betgam, double lcoll) |
---|
83 | { |
---|
84 | |
---|
85 | double Navo(6.022137e23); |
---|
86 | double s(0); |
---|
87 | double atarget, rho, stre; |
---|
88 | string abbreviation; |
---|
89 | |
---|
90 | ifstream entree; |
---|
91 | string filename; |
---|
92 | filename = this->crossSectionPath + "materialinfo.csv";; |
---|
93 | entree.open(filename.c_str()); |
---|
94 | |
---|
95 | if (entree.fail()) { |
---|
96 | cerr << "Error: impossible to read the file " << filename << endl; |
---|
97 | } else { |
---|
98 | |
---|
99 | string word; |
---|
100 | double nbre; |
---|
101 | |
---|
102 | getline(entree, word); |
---|
103 | |
---|
104 | while (!entree.eof()) { |
---|
105 | |
---|
106 | entree >> ws; |
---|
107 | |
---|
108 | getline(entree, word, ','); |
---|
109 | |
---|
110 | if (word == "atarget") { |
---|
111 | entree >> atarget;//mass number of collimator |
---|
112 | } else if (word == "rho") { |
---|
113 | entree >> rho;//density of collimator material |
---|
114 | } else if (word == "stre") { |
---|
115 | entree >> stre;//total EM cross-section |
---|
116 | } else if (word == "abbreviation") { |
---|
117 | entree >> abbreviation;//chemical symbol for collimator material |
---|
118 | } else { |
---|
119 | entree >> word; |
---|
120 | } |
---|
121 | |
---|
122 | }//end while(!entree.eof()) |
---|
123 | |
---|
124 | } |
---|
125 | entree.close(); |
---|
126 | |
---|
127 | double Atarget; |
---|
128 | |
---|
129 | Atarget = atarget * 0.001; |
---|
130 | |
---|
131 | |
---|
132 | while (s < lcoll) { //loop until particle is lost or exits the collimator |
---|
133 | |
---|
134 | string file; |
---|
135 | ifstream entree1; |
---|
136 | double sn, wx, wy, dpopdx; |
---|
137 | |
---|
138 | std::stringstream apzp; |
---|
139 | apzp << p1.Ap0 << p1.Zp0; |
---|
140 | file = this->crossSectionPath + abbreviation + apzp.str() + "nuclEM.dat"; |
---|
141 | entree1.open(file.c_str()); |
---|
142 | |
---|
143 | if (entree1.fail()) { |
---|
144 | cerr << "Warning!! The file " << file << " does not have a valid fomat or does not exist." << endl; |
---|
145 | |
---|
146 | //we calculate analytical approximations to the EMD and hadronic cross section using a BCV parametrization of an impact-parameter cutoff model |
---|
147 | |
---|
148 | double stee, Bbcv, steh, ste, intlengthe; |
---|
149 | stee = stre * p1.Zp0 * (p1.Ap0 - p1.Zp0) / p1.Ap0 / (Zpr * (Apr - Zpr) / Apr); //approximation of electromagnetic dissociation cross section |
---|
150 | Bbcv = 1.34 * (pow(p1.Ap0, 1. / 3.) + pow(atarget, 1. / 3.) - 0.75 * (pow(p1.Ap0, -1. / 3.) + pow(atarget, -1. / 3.))); //radius of the overlap between two "balls" |
---|
151 | Bbcv = Bbcv / 1e15; |
---|
152 | steh = M_PI * Bbcv * Bbcv * 1e31; //area of overlap = hadronic cross section |
---|
153 | ste = steh + stee;//total cross section |
---|
154 | intlengthe = Atarget / (Navo * rho * ste * 1e-31); //approximation to the interaction length |
---|
155 | |
---|
156 | sn = s - intlengthe * log(-p1.random()); //distance between the beginning of the collimator and the next interaction |
---|
157 | |
---|
158 | if ((sn > lcoll) && (p1.Ap0 > 1) && (p1.Zp0 <= p1.Ap0)) { //particle is going out of the collimator |
---|
159 | BeBloMuSca(wx, wy, dpopdx, betgam, filename, rho, lcoll - s, atarget, p1); //calculating change in dx/ds, dy/ds and momentum |
---|
160 | p1.coordonnees[1][0] = p1.coordonnees[0][0];//x coordinate when particle hits |
---|
161 | p1.coordonnees[1][1] = p1.coordonnees[0][1] + wx;//xs=dx/ds when particle hits |
---|
162 | p1.coordonnees[1][2] = p1.coordonnees[0][2];//y coordinate when particle hits |
---|
163 | p1.coordonnees[1][3] = p1.coordonnees[0][3] + wy;//ys=dy/ds when particle hits |
---|
164 | p1.coordonnees[1][4] = p1.coordonnees[0][4] - dpopdx;//dpop = momentum when the particle hits |
---|
165 | return; |
---|
166 | } else {//particle is absorbed |
---|
167 | p1.Ap0 = 0; |
---|
168 | p1.Zp0 = -1; |
---|
169 | p1.coordonnees[1][0] = 0; |
---|
170 | p1.coordonnees[1][1] = 0; |
---|
171 | p1.coordonnees[1][2] = 0; |
---|
172 | p1.coordonnees[1][3] = 0; |
---|
173 | p1.coordonnees[1][4] = 0; |
---|
174 | return; |
---|
175 | } |
---|
176 | |
---|
177 | } else { |
---|
178 | |
---|
179 | double intlength, sigt; |
---|
180 | vector <double> da, dz, isig; |
---|
181 | |
---|
182 | genipsfastnewxc(sigt, isig, da, dz, file, p1.Ap0, p1.Zp0); |
---|
183 | |
---|
184 | if (da.size() == 0) { |
---|
185 | return; |
---|
186 | } |
---|
187 | |
---|
188 | intlength = Atarget / (Navo * rho * sigt * 1e-31); |
---|
189 | |
---|
190 | sn = s - intlength * log(-p1.random()); //Sample from exponential distribution. sn is the position for the next interaction |
---|
191 | |
---|
192 | if (sn > lcoll) { //particle exits collimator |
---|
193 | BeBloMuSca(wx, wy, dpopdx, betgam, filename, rho, lcoll - s, atarget, p1); |
---|
194 | p1.coordonnees[1][0] = p1.coordonnees[0][0]; |
---|
195 | p1.coordonnees[1][1] = p1.coordonnees[0][1] + wx; |
---|
196 | p1.coordonnees[1][2] = p1.coordonnees[0][2]; |
---|
197 | p1.coordonnees[1][3] = p1.coordonnees[0][3] + wy; |
---|
198 | p1.coordonnees[1][4] = p1.coordonnees[0][4] - dpopdx; |
---|
199 | return; |
---|
200 | } else if (lcoll - sn > 10 * intlength) { //particle is lost if it's moving more than 10 interaction lengths inside the collimator |
---|
201 | p1.Ap0 = 0; |
---|
202 | p1.Zp0 = -3; |
---|
203 | p1.coordonnees[1][0] = 0; |
---|
204 | p1.coordonnees[1][1] = 0; |
---|
205 | p1.coordonnees[1][2] = 0; |
---|
206 | p1.coordonnees[1][3] = 0; |
---|
207 | p1.coordonnees[1][4] = 0; |
---|
208 | return; |
---|
209 | } |
---|
210 | |
---|
211 | double dao, dzo, r; |
---|
212 | int chan(0); |
---|
213 | |
---|
214 | r = -p1.random(); |
---|
215 | int temp(0); |
---|
216 | |
---|
217 | //deciding which new isotope is created |
---|
218 | for (int i(0); i < isig.size(); ++i) { |
---|
219 | if (r > isig[i]) { |
---|
220 | temp = temp + 1; |
---|
221 | } else { |
---|
222 | chan = temp; |
---|
223 | } |
---|
224 | } |
---|
225 | |
---|
226 | dao = da[chan - 1]; //decrease in mass number |
---|
227 | dzo = dz[chan - 1]; //decrease in charge |
---|
228 | |
---|
229 | if (dao == -999) { //corresponding to the omitted reactions, see genipsfastnewc. Particle assumed lost |
---|
230 | p1.Ap0 = 0; |
---|
231 | p1.Zp0 = -2; |
---|
232 | p1.coordonnees[1][0] = 0; |
---|
233 | p1.coordonnees[1][1] = 0; |
---|
234 | p1.coordonnees[1][2] = 0; |
---|
235 | p1.coordonnees[1][3] = 0; |
---|
236 | p1.coordonnees[1][4] = 0; |
---|
237 | return; |
---|
238 | } |
---|
239 | |
---|
240 | BeBloMuSca(wx, wy, dpopdx, betgam, filename, rho, sn - s, atarget, p1); //calculating change in dx/ds, dy/ds and momentum |
---|
241 | |
---|
242 | p1.coordonnees[0][1] = p1.coordonnees[0][1] + wx; |
---|
243 | p1.coordonnees[0][3] = p1.coordonnees[0][3] + wy; |
---|
244 | p1.coordonnees[0][4] = p1.coordonnees[0][4] - dpopdx; |
---|
245 | p1.Ap0 = p1.Ap0 - dao; |
---|
246 | p1.Zp0 = p1.Zp0 - dzo; |
---|
247 | |
---|
248 | s = sn;//'moving' particle to the place for the next interaction |
---|
249 | } |
---|
250 | entree1.close(); |
---|
251 | }//end while(s < this->lcoll) |
---|
252 | |
---|
253 | }; |
---|
254 | |
---|
255 | |
---|
256 | void Collimator::genipsfastnewxc(double& sigt, vector <double>& isig, vector <double>& da, vector <double>& dz, string path, double a, double z) |
---|
257 | { |
---|
258 | |
---|
259 | ifstream entree; |
---|
260 | vector <double> temp1, temp2, temp3, sig, temp11, temp22, temp33; |
---|
261 | double maximum(0); |
---|
262 | |
---|
263 | entree.open(path.c_str()); |
---|
264 | |
---|
265 | if (entree.fail()) { |
---|
266 | cerr << "We do not have cross-section information for the isotope with mass number " << a << " and charge " << z << " , i.e. the file " << path << "does not exist or has a wrong format." << endl; |
---|
267 | } else { |
---|
268 | |
---|
269 | double nber1, nber2, nber3; |
---|
270 | vector <double> sig; |
---|
271 | |
---|
272 | |
---|
273 | entree >> nber1 >> nber2 >> nber3; |
---|
274 | |
---|
275 | sigt = nber3; |
---|
276 | |
---|
277 | while (!entree.eof()) { |
---|
278 | |
---|
279 | entree >> nber1 >> nber2 >> nber3; |
---|
280 | |
---|
281 | temp1.push_back(nber1); |
---|
282 | temp2.push_back(nber2); |
---|
283 | temp3.push_back(nber3); |
---|
284 | } |
---|
285 | } |
---|
286 | entree.close(); |
---|
287 | |
---|
288 | double sum(0), msig; |
---|
289 | |
---|
290 | for (int j(0); j < temp1.size(); ++j) { |
---|
291 | if ((temp1[j] < a / 2) && (temp1[j] > 0)) { //only considering reactions where the mass decreases and the particle doesn't loose more than half its mass |
---|
292 | |
---|
293 | temp11.push_back(temp1[j]); |
---|
294 | temp22.push_back(temp2[j]); |
---|
295 | temp33.push_back(temp3[j]); |
---|
296 | } |
---|
297 | } |
---|
298 | |
---|
299 | for (int k(0); k < temp33.size(); ++k) { |
---|
300 | if (temp33[k] > maximum) { |
---|
301 | maximum = temp33[k]; |
---|
302 | } |
---|
303 | } |
---|
304 | |
---|
305 | for (int j(0); j < temp33.size(); ++j) { |
---|
306 | if (temp33[j] > maximum / 100) { //excluding reactions with very small cross-section |
---|
307 | sig.push_back(temp33[j]);//cross sections |
---|
308 | da.push_back(temp11[j]);//change in mass number |
---|
309 | dz.push_back(temp22[j]);//change in charge |
---|
310 | sum = sum + temp33[j]; |
---|
311 | } |
---|
312 | } |
---|
313 | temp1.clear(); |
---|
314 | temp2.clear(); |
---|
315 | temp3.clear(); |
---|
316 | temp11.clear(); |
---|
317 | temp22.clear(); |
---|
318 | temp33.clear(); |
---|
319 | |
---|
320 | if (sig.size() == 0) { |
---|
321 | cout << "No valid change in the cross-section." << endl; |
---|
322 | return; |
---|
323 | } |
---|
324 | msig = sigt - sum; //sum of the excluded cross sections |
---|
325 | |
---|
326 | sig.push_back(sig[sig.size() - 1]); |
---|
327 | da.push_back(da[da.size() - 1]); |
---|
328 | dz.push_back(dz[dz.size() - 1]); |
---|
329 | |
---|
330 | for (int k(sig.size() - 2); k > 0; --k) { |
---|
331 | sig[k] = sig[k - 1]; |
---|
332 | da[k] = da[k - 1]; |
---|
333 | dz[k] = dz[k - 1]; |
---|
334 | } |
---|
335 | |
---|
336 | sig[0] = msig; |
---|
337 | da[0] = -999; |
---|
338 | da.push_back(-998); |
---|
339 | dz[0] = sigt; |
---|
340 | dz.push_back(-998); |
---|
341 | |
---|
342 | vector <double> hsign; |
---|
343 | |
---|
344 | for (int m(0); m < sig.size(); ++m) { |
---|
345 | hsign.push_back(sig[m] / sigt); //the fraction of the total cross section for each channel, with the missing cross sections as first element |
---|
346 | } |
---|
347 | |
---|
348 | //add up the fractional partial cross sections in a vector isig. First element is 0. |
---|
349 | //the different channels will then correspond to different intervals between 0 and 1 with lengths corresponding to their probability. |
---|
350 | |
---|
351 | isig.push_back(0); |
---|
352 | |
---|
353 | for (int p(1); p <= sig.size(); ++p) { |
---|
354 | isig.push_back(hsign[p - 1] + isig[p - 1]); |
---|
355 | } |
---|
356 | |
---|
357 | }; |
---|
358 | |
---|
359 | |
---|
360 | void Collimator::BeBloMuSca(double& wx, double& wy, double& dpopdx, double betgam, string path, double rho, double L, double At, Particle p1) |
---|
361 | { |
---|
362 | |
---|
363 | double me(510998.9);//electron mass [eV/c2] |
---|
364 | double K(0.307075e5);//K/A in table 23.1, PDG page 163 |
---|
365 | double beta(sqrt(betgam * betgam / (betgam * betgam + 1))); //relativistic beta |
---|
366 | double gamma(betgam / beta); //relativistic gamma |
---|
367 | double X = log10(betgam); |
---|
368 | double Zt, X0, X1, m, a, C, M0, X0MS, Tmax, delta, wrms, Ii, pr, w, dEdx; |
---|
369 | |
---|
370 | ifstream entree; |
---|
371 | |
---|
372 | entree.open(path.c_str()); |
---|
373 | |
---|
374 | if (entree.fail()) { |
---|
375 | cerr << "Warning: problem with the file '" << path << "'." << endl; |
---|
376 | } else { |
---|
377 | |
---|
378 | string word; |
---|
379 | double nbre; |
---|
380 | |
---|
381 | while (!entree.eof()) { |
---|
382 | |
---|
383 | getline(entree, word, ','); |
---|
384 | |
---|
385 | if (word == "ztarget") { |
---|
386 | getline(entree, word); |
---|
387 | Zt = atof(word.c_str());//atom number of collimator |
---|
388 | } else if (word == "X0") { |
---|
389 | getline(entree, word); |
---|
390 | X0 = atof(word.c_str());//Sternheimer parameter needed for density correction (not checked) |
---|
391 | } else if (word == "X1") { |
---|
392 | getline(entree, word); |
---|
393 | X1 = atof(word.c_str());//Sternheimer parameter needed for density correction (not checked) |
---|
394 | } else if (word == "m") { |
---|
395 | getline(entree, word); |
---|
396 | m = atof(word.c_str());//Sternheimer parameter needed for density correction (not checked) |
---|
397 | } else if (word == "a") { |
---|
398 | getline(entree, word); |
---|
399 | a = atof(word.c_str());//Sternheimer parameter needed for density correction (not checked) |
---|
400 | } else if (word == "C") { |
---|
401 | getline(entree, word); |
---|
402 | C = atof(word.c_str());//Sternheimer parameter needed for density correction (not checked) |
---|
403 | } else { |
---|
404 | getline(entree, word); |
---|
405 | } |
---|
406 | }//end while(!entree.eof()) |
---|
407 | entree.close(); |
---|
408 | } |
---|
409 | |
---|
410 | M0 = 931.494e6 * p1.Ap0; //mass of ion [MeV/c2] |
---|
411 | X0MS = 716.4 * At / (Zt * (Zt + 1) * log(287 / sqrt(Zt))) / (rho / 1000); |
---|
412 | if (Zt < 13) { //mean excitation potential [eV] |
---|
413 | Ii = Zt * (12 + 7 / Zt); |
---|
414 | } else { |
---|
415 | Ii = Zt * (9.76 + 58.8 * pow(Zt, -1.19)); |
---|
416 | } |
---|
417 | |
---|
418 | Tmax = 2 * me * betgam * betgam / (1 + 2 * gamma * me / M0 + (me / M0) * (me / M0)); //Tmax (in eV) in Bethe-Bloch, PDG page 164 |
---|
419 | |
---|
420 | //DENSITY CORRECTION |
---|
421 | |
---|
422 | if (X < X0) { |
---|
423 | delta = 0;//valid for non-conductors |
---|
424 | } else if ((X0 < X) && (X < X1)) { |
---|
425 | delta = 4.6052 * X + C + a * pow(X1 - X, m); |
---|
426 | } else { |
---|
427 | delta = 4.6052 * X + C; |
---|
428 | } |
---|
429 | |
---|
430 | L = L * 100; |
---|
431 | wrms = 19.2333e6 / (beta * betgam * M0) * p1.Zp0 * sqrt(L / X0MS) * (1 + 0.038 * log(L / X0MS)); //rms angular deviation from mult.scatt. Compare PDG page 166 - where does the prefactor come from? --from the fact that it's 3D not plane. |
---|
432 | |
---|
433 | L = L / 100; |
---|
434 | |
---|
435 | |
---|
436 | pr = -p1.random() * 2 * M_PI; //This line and the next samples from a 2D gaussian distribution the angular deviation in x and y. |
---|
437 | w = wrms * sqrt(-log(1 + p1.random())); |
---|
438 | |
---|
439 | //In order to make it analytically possible to sample, it is converted to polar coordinates, and the radius w and angle phi are sampled |
---|
440 | |
---|
441 | wx = w * cos(pr); //change in dx/ds |
---|
442 | wy = w * sin(pr); //change in dy/ds |
---|
443 | |
---|
444 | dEdx = rho * K * p1.Zp0 * p1.Zp0 * Zt / At / (beta * beta) * (0.5 * log(2 * me * betgam * betgam * Tmax / (Ii * Ii)) - beta * beta - delta / 2); //energy loss acc. to Bete-Bloch on page 163 in PDG [eV/Meter] |
---|
445 | |
---|
446 | dpopdx = L * dEdx / (M0 * gamma) / (beta * beta); //delta p/p caused by energy change due to Bethe-Bloch |
---|
447 | }; |
---|