Polarization Measurements With BSO
We performed a scan as function of the thickness of the material (lead) positioned upstream the crystal. DAQ informations:
- Crystal data acquired with the scope (scale for each run reported on the logbook)
- channel 1 = X1 = left side = downstream; HV = 770 V
- channel 2 = X2 = right side = upstream; HV = 720 V
- No veto, no preshower detector included in the daq
- 80 GeV electron (beam file H8C.001)
- table position: x = 53.6; y = 73.65; angle = ~30 degrees (angle of the xtal box wrt the plane perpendicular to the beam )
Favorable orientation of the polarizer filter (horizontal)
- Data taken on 18.7 shift 0-8
- logbook pages 36-38
Unfavorable orientation of the polarizer filter (vertical)
- Data taken on 18.7 shift 0-8
- logbook pages 39
Measurements redone from the 19th evening because the beamfile was changed (now
H8C.729 )
--
AlanSill - 21-Jul-2012