Updated drift gas. It's Ne-CO2 90/10 now.

[u/mrichter/AliRoot.git] / TPC / AliTPC.cxx

diff --git a/TPC/AliTPC.cxx b/TPC/AliTPC.cxx
index ed24ff8d0935567f977056cc66a619153a3e13c9..34487b649816cc1fc6e6442c8f08761c57f7dd4a 100644 (file)
--- a/TPC/AliTPC.cxx
+++ b/TPC/AliTPC.cxx
@@ -294,30 +294,33 @@ void AliTPC::CreateMaterials()
 
   //
   // Drift gases 1 - nonsensitive, 2 - sensitive
-  // Ne-CO2-N2 (90-10-5) (volume) values at 20deg and 1 atm.
-  // rho(Ne) = 0.839 g/cm^3, rho(CO2) = 1.842 g/cm^3, rho(N2) = 1.165 g/cm^3
-  // for the calculation - everything is normalized to 1
+  // Ne-CO2 (90-10) (volume) values at 20deg and 1 atm.
+  // rho(Ne) = 0.839 g/cm^3, rho(CO2) = 1.842 g/cm^3
+  
 
   amat[0]= 20.18;
   amat[1]=12.011;
   amat[2]=15.9994;
-  amat[3]=14.007;
+  // amat[3]=14.007;
 
   zmat[0]= 10.; 
   zmat[1]=6.;
   zmat[2]=8.;
-  zmat[3]=7.;
-
-  wmat[0]=0.756992632;
-  wmat[1]=0.056235789;
-  wmat[2]=0.128469474;
-  wmat[3]=0.058395789;
+  // zmat[3]=7.;
+
+  //wmat[0]=0.756992632;
+  wmat[0]=0.8038965;
+  //wmat[1]=0.056235789;
+  wmat[1]= 0.053519;
+  //wmat[2]=0.128469474;
+  wmat[2]= 0.1425743;
+  // wmat[3]=0.058395789;
  
-  density=0.000904929;
+  density=0.0009393;
 
-  AliMixture(12,"Ne-CO2-N-1",amat,zmat,density,4,wmat);
-  AliMixture(13,"Ne-CO2-N-2",amat,zmat,density,4,wmat);
-  AliMixture(35,"Ne-CO2-N-3",amat,zmat,density,4,wmat);
+  AliMixture(12,"Ne-CO2-1",amat,zmat,density,3,wmat);
+  AliMixture(13,"Ne-CO2-2",amat,zmat,density,3,wmat);
+  AliMixture(35,"Ne-CO2-3",amat,zmat,density,3,wmat);
   //----------------------------------------------------------------------
   //               solid materials
   //----------------------------------------------------------------------
@@ -680,10 +683,10 @@ void AliTPC::CreateMaterials()
   //----------------------------------------------------------
 
   AliMedium(0, "Air", 11, 0, iSXFLD, sXMGMX, 10., 999., .1, .01, .1);
-  AliMedium(1, "Ne-CO2-N-1", 12, 0, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
-  AliMedium(2, "Ne-CO2-N-2", 13, 1, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
+  AliMedium(1, "Ne-CO2-1", 12, 0, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
+  AliMedium(2, "Ne-CO2-2", 13, 1, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
   AliMedium(3,"CO2",10,0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001); 
-  AliMedium(20, "Ne-CO2-N-3", 35, 1, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
+  AliMedium(20, "Ne-CO2-3", 35, 1, iSXFLD, sXMGMX, 10., 999.,.1,.001, .001);
   //-----------------------------------------------------------  
   // tracking media for solids
   //-----------------------------------------------------------