4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. */
9 const Float_t thetaOpen2 = 0.78*kDegrad;
11 const Float_t thetaOpen3 = 0.78*kDegrad;
12 // angle of beam tube in second cone
13 const Float_t thetaOpenB = 0.83*kDegrad;
14 // const Float_t thetaOpenB = 0.84*kDegrad;
15 // inner lead Cone opening angle
16 const Float_t thetaOpenPb = 0.6*kDegrad;
17 // Outer Pb Cone opening angle
18 const Float_t thetaOpenPbO = 1.6*kDegrad;
20 const Float_t zPb = 810.;
21 // y-position of trigger wall
22 const Float_t zFilterIn = 1471.;
23 const Float_t zFilterOut = zFilterIn+120.;
24 // end of 2-degree outer cone
25 // const Float_t zConeE = 30./TMath::Tan(accMin);
26 const Float_t zConeE = 859.;
30 const Float_t dInsuS=0.6;
31 const Float_t dEnveS=0.1;
32 const Float_t dProtS=0.2;
33 const Float_t dFreeS=0.45;
35 Float_t dVacuS=dTubeS+dInsuS+dEnveS+dProtS+dFreeS;
38 // Radii and z-positions imposed by vacuum chamber layout
41 // delta_R for bellows
42 const Float_t dr11=1.8;
44 const Float_t dr12=0.875;
45 // delta_R to catch up with cone
46 const Float_t dr13=0.525;
49 const Float_t dF1=2.*3.9;
51 const Float_t dB1=18.482-dF1/2-dr11;
53 const Float_t zvac2=518.;
54 const Float_t zvac1=zvac2-dF1/2-dB1-dr11-dr12;
55 const Float_t zvac3=zvac2+dF1/2+dB1+dr12+dr13;
56 const Float_t zvac4=558.;
57 // Outer shield dimensions
58 const Float_t R11=15.45;
60 const Float_t dRSteel1=2.;
61 const Float_t dRSteel2=4.;
62 // According to design
63 // const Float_t R21=20.3;
64 // to avoid overlap with 2deg line
65 const Float_t R21=19.4;
69 const Float_t zvac5=zvac4+4.;
73 const Float_t zvac6=711.;
74 const Float_t zvac8=1274.;
75 //const Float_t dr21=2.263;
76 const Float_t dr21=.5;
77 const Float_t dr22=1.3;
78 const Float_t dr23=2.263;
79 const Float_t dB2=24.118;
80 const Float_t dF2=10.6;
81 const Float_t zvac7=zvac8-dF2/2-dB2-dr22-dr21;
82 const Float_t zvac9=zvac8+dF2/2+dB2+dr22+dr23;
86 const Float_t zvac10=1466.;
87 const Float_t zvac11=1800.;
88 const Float_t zvac12=1900.;
90 const Float_t R41=35.;
91 const Float_t R42=50.;
92 const Float_t R43=110.;
100 const Float_t rB1=5.5;
101 const Float_t hB1=2.25;
102 const Float_t lB1=0.77;
103 const Float_t eB1=0.04;
107 const Float_t rF1=8.4;
108 const Float_t dFlange=0.1;
113 const Float_t rB2=15.85;
114 const Float_t hB2=2.25;
115 const Float_t lB2=2.32;
116 const Float_t eB2=0.05;
120 const Float_t rF2=18.5;
125 const Float_t zch1 = 530.0 ;
126 const Float_t zch2 = 672.5 ;
128 const Float_t zch11 = 526.2 ;
129 const Float_t zch12 = 553.8 ;
130 const Float_t zch21 = 670.25;
131 const Float_t zch22 = 701.75;
132 const Float_t zch31 = 946. ;
133 const Float_t zch32 = 1046. ;
134 const Float_t zch41 = 1238.16;
135 const Float_t zch42 = 1296.16;
136 const Float_t zch51 = 1399.0 ;
137 const Float_t zch52 = 1457.0 ;