Difference between revisions of "May 3, 2019 - PrimEx-Eta Meeting"

Latest revision as of 13:42, 24 May 2019

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CompCal Calibrations
- Sasha showed that the CompCal energies from reconstructed compton events are shifted by up to 200 MeV. We will need to develop a procedure for calibration.
- Potentially we can use compton events for energy calibrations in addition to the snake scans.
Eta distributions
- Drew's slides with eta yields and angular distribution: eta_yield_slides_05_03_19.pdf
- Next week, will provide more detailed plots with progression of individual cuts and their impacts on the distribution.
- The angular distributions still need to have accidental and empty target subtractions applied.
Sean is working on timing alignments, so we will need to coordinate with him
- Drew pointed out that the detector alignments with respect to the rf shifts a few times over the course of the run period. In particular these ranges need separate alignments (there could be other shifts outside of these run ranges):

        * 61426-61447
        * 61462-61568
        * 61621-61723
        * 61727-61743
        * 61744-61912

@@ Line 15: / Line 15: @@
 [https://halldweb.jlab.org/primexd/meetings/meeting_5_3_19/compton Accidentals in Compton reconstruction]
-[https://userweb.jlab.org/~andrsmit/plots_05_03/slides_05_03_19.pdf Primakoff Yields and Eta Angular Distribution]
+[https://userweb.jlab.org/~andrsmit/meetingPlots/plots_05_03/slides_05_03_19.pdf Primakoff Yields and Eta Angular Distribution]
 == Minutes ==