Difference between revisions of "Winter 2016 calorimeter calibration (elastic)"
From Hall A Wiki
| Line 9: | Line 9: | ||
angle<SUB>LHRS</SUB>= 38.04 [deg]<br> | angle<SUB>LHRS</SUB>= 38.04 [deg]<br> | ||
momentum<SUB> LHRS</SUB>= 2.127 GeV<br> | momentum<SUB> LHRS</SUB>= 2.127 GeV<br> | ||
| + | |||
| + | |||
| + | |||
| + | [[Image:Elastic_kinematic_4.5.jpg| 1000px]] | ||
| + | |||
| + | |||
| + | [[Image:Kine_elast_versus_e_angle.jpg| 1000 px]] | ||
| + | |||
| + | |||
| + | We are going to move the calorimeter and leave the HRS fixed but we could have done the contrary (see table below). | ||
| + | |||
<table border="1" style="width:90%"> | <table border="1" style="width:90%"> | ||
| Line 33: | Line 44: | ||
</tr> | </tr> | ||
</table> | </table> | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
Revision as of 11:01, 13 February 2016
Back to [Winter2016 DVCS run plan]
θcalo [deg]= 25., θSTAND [deg]= ??.
Need to remove the plastic shield.
Calorimeter-Target distance =6.2m
Unrastered beam (which means beam current at less than 5 uA).
LHRS in positive polarity.
DAQ: DVCS config, trigger is S0+S2, autovalidation.
angleLHRS= 38.04 [deg]
momentum LHRS= 2.127 GeV
We are going to move the calorimeter and leave the HRS fixed but we could have done the contrary (see table below).
| pHRS [GeV]=2.217 | angleLHRS [deg]=36.80 | minutes to 500 evts per blocs at 10uA=12 | kp [GeV]=3.0 | Q2=2.7585 |
| pHRS [GeV]=2.127 | angleLHRS [deg]=38.04 | minutes to 500 evts per blocs at 10uA=9 | kp [GeV]=3.1 | Q2=2.603 |
| pHRS [GeV]=2.046 | angleLHRS [deg]=39.18 | minutes to 500 evts per blocs at 10uA=6. | kp [GeV]=3.2 | Q2=2.464 |
