June 30 2011 Meeting Summary

Back to CSR Weekly Meeting on 2011

1. hyao: [cross section for Fe]
2. xinhu: [Cross section comparison between left and right arm for 60 deg]
3. xinhu: [Cross section comparison between left and right arm for 90 deg]
4. xinhu: [Acceptance Plot Corrected]

xinhu:

1. Acceptance region is so small that it may easily cause large error.

hyao:

1. 90,120 deg has one constant scale factor offset between left and right.
2. 60 deg, it seems wrong angle for left arm after first period or it may be caused by radiative correction because of different oriented target.

To do list:

xinhu:

1. correct efficiency for the bad block , THaShower.C
2. do the simulation of acceptance for the full region of NaI (box2 and box3) and check the efficiency correction for bad blocks of NaI
3. and then calculate the cross sections for the left arm

hyao:

1. Acceptance is independent of target. So recalculate the acceptance with turning off the radiative in SAMC. ---->Disable multi-scattering and energy loss in SAMC.--hyao 10:01, 1 July 2011 (UTC)
2. Compare the cross section of the right arm without/with pre-shower/shower cut.---->Done but still see difference.--hyao 10:01, 1 July 2011 (UTC)
3. Compare cross section between two arms with gc cut only.---->Done but still see difference.--hyao 10:01, 1 July 2011 (UTC)
4. Calculate the RC for previous cross sections to see the result.---->Done.--hyao 10:01, 1 July 2011 (UTC)
5. Find where constant factor is from for 90,120?---->Done. I think it's because of low energy optics of right arm.--hyao 10:01, 1 July 2011 (UTC)