a summary on polarisation in run-12 for 255 gev
DESCRIPTION
A summary on Polarisation in Run-12 for 255 geV. E.C. Aschenauer presenting the work done by Alan, anders , Bill and Dima. 2 55 GeV Results. Flat top for 255 GeV. injections for 255 GeV. polarisation at injection Blue and Yellow Caveat: Online pC numbers not normalized - PowerPoint PPT PresentationTRANSCRIPT
A SUMMARY ON POLARISATION IN RUN-12FOR 255 GEV
E.C. ASCHENAUERPRESENTING THE WORK DONE BY ALAN,
ANDERS, BILL AND DIMA
2012/04/03 2
255 GEV RESULTS
polarisation at injectionBlue and Yellow
Caveat:Online pC numbers not normalized to jet
E.C. Aschenauer
injections for 255 GeV
Flat top for 255 GeV
2012/04/03 3
255 GEV RESULTS
E.C. Aschenauer
polarisation at flat topBlue and Yellow
H-Jet
longitudinal
Blue-1
Yellow-1
2012/04/03 4
NORMALIZATION TO H-JET
E.C. Aschenauer
Blue-1: already in good agreement with jet
Blue-2: experimental polarimeter need a to normalize by 1.2
2012/04/03 5
NORMALIZATION TO H-JET
E.C. Aschenauer
Yellow-2: already in good agreement with jet
Yellow-1: need a to normalize by 1.07
2012/04/03 6
255 GEV RESULTS TRANSVERSE FILLS
E.C. Aschenauer
1.4%±0.21/hour0.10%±0.23/hour Polarisation lifetime inyellow very similar to longitudinal 255 GeV fills
2012/04/03 7
255 GEV RESULTS
E.C. Aschenauer
1.288%±0.18/hour0.71%±0.28/hour
H-Jet:Fills: 16586-16592longitudinal
2012/04/03 8
255 GEV RESULTS
E.C. Aschenauer
0.9%±0.11/hour0.62%±0.13/hour
Run-110.39%±0.07/hour
Run-110.78%±0.07/hour
Polarisation lifetime very similar run-11 and run-12 so 255 GeV did notdo the trick
2012/04/03 9
255 GEV RESULTS
E.C. Aschenauer
0.8%±0.096/hour1.2%±0.16/hour
Polarisation Lifetime for lowEmittance fills
2012/04/03 10
255 GEV RESULTS
E.C. Aschenauer
0.39%±0.10/hour0.75%±0.13/hour
Polarisation Lifetime sincelast week
Jet same fill range
2012/04/03 11
POLARISATION LOSS THROUGH ROTATOR RAMP
E.C. Aschenauer
Shown are the polarisationmeasurements before and after the rotator ramp at 255 GeV
Blue Beam
Yellow Beam
2012/04/03 12
RADIAL SPIN ANGLE MEASURED BY PC
E.C. Aschenauer
24 GeV
100 GeV
255 GeV
2012/04/03 13
BIG PROBLEM
Basically no targets left in blue and yellow If you want these info as presented we need to install
new targets in both beams Impact on APEX program
E.C. Aschenauer