- //Begin_Html
- /*
- <img src="picts/AliABSOTree.gif">
- */
- //End_Html
- //Begin_Html
- /*
- <img src="picts/AliABSO.gif">
- */
- //End_Html
-
- Int_t *idtmed = fIdtmed->GetArray()-1599;
-
- Float_t d_pb, cpar[5], dpar[12], tpar[3], zpos,
- cpar1[5], cpar2[5], cpar3[5], cpar4[5], cpar5[12],
- cpar7[5], cpar8[5], cpar9[5], abs_c, abs_d,
- abs_l, cpar10[5], r_abs;
- Float_t theta1, theta2, abs_cc, d_rear, dz, zr,
- z_cone, d_poly, z_nose, theta_open;
- Float_t acc_min, acc_max, par[50], d_steel, z_w,
- theta_r, epsilon;
- //
- abs_d = 90.; // DEFINES DRIFT LENGTH
- z_nose = 102.;
- z_cone = 285.;
- theta1 = 24.; // 1. angle defining the front absorber
- theta2 = 5.; // 2. angle defining the front absorbe
- acc_max = 9.; // ANGLE POLAIRE MAXIMUM
- acc_min = 2.; // ANGLE POLAIRE MINIMUM DE DETECTION
- abs_l = 503.;
- d_steel = 1.; // THICKNESS OF STEEL SUPPORT
- d_poly = 7.5;
- d_pb = 2.5;
- abs_cc = 315.; // DEFINES LENGTH OF CARBON
- abs_c = 358.;
- //abs_s = 150.; // DEFINES W-SHIELD LENGTH
- //abs_n = 80.; // START OF NOSE
- r_abs = 4.;
- //r_pb = .1;
- epsilon = .01;
- theta_r = 3.;
- d_rear = 35.;
- theta_open = .75;
- //
- //z_l3 = 700.;
- //zmag_in = 725.;
- //zmag_out = 1225.;
- //zfil_in = 1471.;
- //zfil_out = 1591.;
- //zcon_in = 1900.;
- //zcon_out = 2e3;
- //zcone_e = 859.0875;
- //spec_l = 1800.;
- //zplug_in = 1780.;
- //zplug_out= 1900.;
- //
- // Chamber position
- // CZ1=515.5
- //cz1 = 511.;
- //cz2 = 686.;
- //cz3 = 971.;
- //cz4 = 1245.;
- //cz5 = 1445.;
- //cz6 = 1610.;
- //cz7 = 1710.;
- //
- // --- Outer shape of front absorber
- par[0] = 0.;
- par[1] = 360.;
- par[2] = 4.;
- par[3] = abs_d;
- par[4] = 0.;
- par[5] = abs_d * TMath::Tan(theta1 * kDegrad);
- par[6] = z_nose;
- par[7] = 0.;
- par[8] = par[6] * TMath::Tan(theta1 * kDegrad);
- par[9] = z_cone;
- par[10] = 0.;
- par[11] = par[8] + (par[9] - par[6]) * TMath::Tan(theta2 * kDegrad);
- par[12] = abs_l;
- par[13] = 0.;
- par[14] = par[11] + (par[12] - par[9]) * TMath::Tan(acc_max * kDegrad);
- gMC->Gsvolu("ABSM", "PCON", idtmed[1605], par, 15);
- //
- // --- Now define all elements of the absorber
- //
- // TUNGSTEN NOSE SEGMENT BETWEEN Z=90 AND 112 CM
- // SHAPED ALONG A 24 DEG LINE
- //
- cpar1[0] = (z_nose - abs_d) / 2.;
- cpar1[1] = abs_d * TMath::Tan(acc_max * kDegrad) + d_steel;
- cpar1[2] = abs_d * TMath::Tan(theta1 * kDegrad);
- cpar1[3] = z_nose * TMath::Tan(acc_max * kDegrad) + d_steel;
- cpar1[4] = z_nose * TMath::Tan(theta1 * kDegrad);
- gMC->Gsvolu("ANOS", "CONE", idtmed[1611], cpar1, 5);
- //
- dz = cpar1[0] + abs_d;
- gMC->Gspos("ANOS", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // IRON SUPPORT STRUCTURE
- //
- cpar2[0] = (abs_l - abs_d) / 2.;
- cpar2[1] = abs_d * TMath::Tan(acc_max * kDegrad);
- cpar2[2] = cpar2[1] + d_steel;
- cpar2[3] = abs_l * TMath::Tan(acc_max * kDegrad);
- cpar2[4] = cpar2[3] + d_steel;
- gMC->Gsvolu("ASST", "CONE", idtmed[1658], cpar2, 5);
- dz = cpar2[0] + abs_d;
- gMC->Gspos("ASST", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // PB FRONT SHIELD INNER SEGMENT, ALSO POLYETHYLENE WAS
- // CONSIDERED FOR THIS REGION
- //
- cpar3[0] = (z_cone - z_nose) / 2.;
- cpar3[1] = cpar1[3];
- cpar3[2] = cpar1[3] + d_poly;
- cpar3[3] = z_cone * TMath::Tan(acc_max * kDegrad) + d_steel;
- cpar3[4] = cpar3[3] + d_poly;
- gMC->Gsvolu("AWFS", "CONE", idtmed[1652], cpar3, 5);
- dz = cpar3[0] + z_nose;
- gMC->Gspos("AWFS", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // PB OUTER SURFACE
- //
- cpar5[0] = 0.;
- cpar5[1] = 360.;
- cpar5[2] = 3.;
- cpar5[3] = z_nose;
- cpar5[4] = z_nose * TMath::Tan(acc_max * kDegrad) + d_steel + d_poly;
- cpar5[5] = z_nose * TMath::Tan(theta1 * kDegrad);
- cpar5[6] = z_cone;
- cpar5[7] = z_cone * TMath::Tan(acc_max * kDegrad) + d_steel + d_poly;
- cpar5[8] = cpar5[7] + d_pb;
- cpar5[9] = abs_l;
- cpar5[10] = abs_l * TMath::Tan(acc_max * kDegrad) + d_steel + d_poly;
- cpar5[11] = cpar5[10] + d_pb;
- gMC->Gsvolu("APBS", "PCON", idtmed[1612], cpar5, 12);
- dz = 0.;
- gMC->Gspos("APBS", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // POLYETHYLEN LAYER
- //
- cpar4[0] = (abs_l - z_cone) / 2.;
- cpar4[1] = z_cone * TMath::Tan(acc_max * kDegrad) + d_steel;
- cpar4[2] = cpar4[1] + d_poly;
- cpar4[3] = abs_l * TMath::Tan(acc_max * kDegrad) + d_steel;
- cpar4[4] = cpar4[3] + d_poly;
- gMC->Gsvolu("APOL", "CONE", idtmed[1657], cpar4, 5);
- dz = cpar4[0] + z_cone;
- gMC->Gspos("APOL", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // LEAD INNER SHIELD (inner radius const up to z=abs_c)
- //
- z_w = r_abs / TMath::Tan(acc_min * kDegrad);
- cpar8[0] = (abs_c - z_w) / 2.;
- cpar8[1] = r_abs;
- cpar8[2] = r_abs + epsilon;
- cpar8[3] = r_abs;
- cpar8[4] = abs_c * TMath::Tan(acc_min * kDegrad);
- gMC->Gsvolu("AWI1", "CONE", idtmed[1652], cpar8, 5);
- dz = cpar8[0] + z_w;
- gMC->Gspos("AWI1", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // TUNGSTEN OPENING CONE UP TO THE END
- //
- cpar8[0] = (abs_l - abs_c) / 2.;
- cpar8[1] = r_abs;
- cpar8[2] = abs_c * TMath::Tan(acc_min * kDegrad);
- cpar8[3] = cpar8[1] + cpar8[0] * 2. * TMath::Tan(theta_open * kDegrad);
- cpar8[4] = abs_l * TMath::Tan(acc_min * kDegrad);
- gMC->Gsvolu("AWI2", "CONE", idtmed[1651], cpar8, 5);
- dz = cpar8[0] + abs_c;
- gMC->Gspos("AWI2", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // CONCRETE CONE
- //
- cpar7[0] = (abs_l - d_rear - abs_cc) / 2.;
- cpar7[1] = abs_cc * TMath::Tan(acc_min * kDegrad);
- cpar7[2] = abs_cc * TMath::Tan(acc_max * kDegrad);
- cpar7[3] = (abs_l - d_rear) * TMath::Tan(acc_min * kDegrad);
- cpar7[4] = (abs_l - d_rear) * TMath::Tan(acc_max * kDegrad);
- gMC->Gsvolu("ACON", "CONE", idtmed[1656], cpar7, 5);
- dz = cpar7[0] + abs_cc;
- gMC->Gspos("ACON", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // REAR SHIELD
- //
- zr = abs_l - d_rear;
- cpar9[0] = 2.5;
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE1", "CONE", idtmed[1652], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE1", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE2", "CONE", idtmed[1657], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE2", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE3", "CONE", idtmed[1652], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE3", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE4", "CONE", idtmed[1657], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE4", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE5", "CONE", idtmed[1652], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE5", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE6", "CONE", idtmed[1657], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE6", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- cpar9[1] = zr * TMath::Tan(theta_r * kDegrad);
- cpar9[2] = zr * TMath::Tan(acc_max * kDegrad);
- cpar9[3] = cpar9[1] + TMath::Tan(theta_r * kDegrad) * 5.;
- cpar9[4] = cpar9[2] + TMath::Tan(acc_max * kDegrad) * 5.;
- gMC->Gsvolu("ARE7", "CONE", idtmed[1612], cpar9, 5);
- dz = cpar9[0] + zr;
- zr += 5.;
- gMC->Gspos("ARE7", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // TUNGSTEN REAR SHIELD INNER PART
- //
- zr = abs_l - d_rear;
- cpar10[0] = d_rear / 2.;
- cpar10[1] = zr * TMath::Tan(acc_min * kDegrad);
- cpar10[2] = zr * TMath::Tan(theta_r * kDegrad);
- cpar10[3] = cpar10[1] + d_rear * TMath::Tan(acc_min * kDegrad);
- cpar10[4] = cpar10[2] + d_rear * TMath::Tan(theta_r * kDegrad);
- gMC->Gsvolu("ARIN", "CONE", idtmed[1611], cpar10, 5);
- dz = cpar10[0] + zr;
- gMC->Gspos("ARIN", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // ELEMENTS OF THE BEAM PIPE TO BE POSITIONED INTO THE ABSORBER
- //
- // MOTHER VOLUME 1. SEGMENT
- //
- tpar[0] = 0.;
- tpar[1] = r_abs;
- tpar[2] = (abs_c - abs_d) / 2.;
- gMC->Gsvolu("AATU", "TUBE", idtmed[1655], tpar, 3);
- //
- tpar[1] = r_abs - .8;
- tpar[0] = tpar[1] - .2;
- tpar[2] = (abs_c - abs_d) / 2.;
- gMC->Gsvolu("ATUB", "TUBE", idtmed[1649], tpar, 3);
- dz = 0.;
- gMC->Gspos("ATUB", 1, "AATU", 0., 0., dz, 0, "ONLY");
- //
- dz = (abs_c - abs_d) / 2. + abs_d;
- gMC->Gspos("AATU", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- // MOTHER VOLUME 2. SEGMENT
- //
- cpar[0] = (abs_l - abs_c) / 2.;
- cpar[1] = 0.;
- cpar[2] = r_abs;
- cpar[3] = 0.;
- cpar[4] = cpar[2] + cpar[0] * 2. * TMath::Tan(theta_open * kDegrad);
- gMC->Gsvolu("AAT1", "CONE", idtmed[1655], cpar, 5);
- //
- cpar[0] = (abs_l - abs_c) / 2.;
- cpar[2] += -.8;
- cpar[1] = cpar[2] - .2;
- cpar[4] += -.8;
- cpar[3] = cpar[4] - .2;
- gMC->Gsvolu("ATU1", "CONE", idtmed[1649], cpar, 5);
- dz = 0.;
- gMC->Gspos("ATU1", 1, "AAT1", 0., 0., dz, 0, "ONLY");
- //
- dz = (abs_l - abs_c) / 2. + abs_c;
- gMC->Gspos("AAT1", 1, "ABSM", 0., 0., dz, 0, "ONLY");
- //
- gMC->Gspos("ABSM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
- //
- // absorber support structure
- //
- // attention this element is positioned into ALIC
- //
- dpar[0] = 0.;
- dpar[1] = 360.;
- dpar[2] = 3.;
- dpar[3] = abs_l;
- dpar[4] = abs_l * TMath::Tan(acc_max * kDegrad);
- dpar[5] = dpar[4] + 4. / TMath::Cos(acc_max * kDegrad);
- dpar[6] = 600.;
- dpar[7] = TMath::Tan(acc_max * kDegrad) * 600;
- dpar[8] = dpar[7] + 4. / TMath::Cos(acc_max * kDegrad);
- dpar[9] = 670.;
- dpar[10] = 159.;
- dpar[11] = 163.5;
- gMC->Gsvolu("ASUP", "PCON", idtmed[1618], dpar, 12);
- dz = 0.;
- gMC->Gspos("ASUP", 1, "ALIC", 0., 0., dz, 0, "ONLY");
- //
- // Flange at the entrance of the absorber
- //
- tpar[0] = 3.;
- tpar[1] = 5.7;
- tpar[2] = 2.;
- gMC->Gsvolu("AF63", "TUBE", idtmed[1618], tpar, 3);
- zpos = abs_d + tpar[2];
- gMC->Gspos("AF63", 1, "ABSM", 0., 0., zpos, 0, "ONLY");