# PbBi 60cmLong Solenoid Collection Efficiency 2015

Positron Collection rates with 60 cm long Solenoid

 When the solenoid is 1.5 Tesla, a 10 MeV electron produces a 6.5 MeV photon that pair produces a 4.4 MeV positron and a 1 MeV electron Same Event but this time the solenoid is 0.3 Tesla and the positron hits the beam pipe, annihilates and makes two 511 keV photons
 When the solenoid is set to 1.5 Tesla, a 10 MeV electron produces three photons less than 1 MeV in the target, two of them compton scatter in the beam pipe The same event but this time the electron produces only 1 photon than ionizes in the target

With SS windows

Positrons->Draw("sqrt(evt.BeamPosPosX*evt.BeamPosPosX+evt.BeamPosPosY*evt.BeamPosPosY)","evt.BeamPosMomZ>0 && evt.BeamPosPosZ>-500 && sqrt(evt.BeamPosPosX*evt.BeamPosPosX+evt.BeamPosPosY*evt.BeamPosPosY)<97.4/2");


 B-field (Tesla) 34.8 mm diameter pipe 47.5 60.2 72.9 97.4 0.0 0.35 1,2,4,4,5 2,3,4,4,6 4,4,6,7,9 6,8,9,10,11 16,14,15,16,17 0.1 225,236,250,246,249=241 10 282,282,293,294,306=291 10 373,366,370,364,373=369 4 451,437,440,438,451=443 7 602,584,563,558,570=575 18 0.3 0.35 626,619,596,619,611 =614 11 720,726,706,730,717=720 9 871,864,840,841,834 =850 16 987,968,939,943,952 =958 20 1118,1106,1069,1067,1080=1088 23 0.6 929,935,949,969,961=949 17 1022,1031,1046,1059,1052 =1042 15 1120,1130,1152,1154,1146 =1140 15 1168,1184,1210,1221,1206 =1198 21 1212, 1218,1240,1254,1242=1233 18 1.0 0.35 1117,1085,1083,1061,1085=1086 20 1188,1154,1140,1111,1134=1145 28 1225,1190,1178,1149,1172 =1183 28 1243.1208,1195,1164,1184=1199 30 1252,1219,1206,1178,1200=1211 27 1.5 0.22 2.0 0.10 1198,1210,1215,1223,1176=1204 18 1216,1227,1235,1241,1196 =1223 18 1237,1243,1252,1257,1214=1241 17 1249,1252,1262,1266,1225 =1251 16 1257,1262,1270,1276,1234=1260 16 4.0 0.002