Difference between revisions of "Moller Polarimeter/A1n/d2n"
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<b>December 19, 2019</b>[https://logbooks.jlab.org/entry/3756521 summary] | <b>December 19, 2019</b>[https://logbooks.jlab.org/entry/3756521 summary] | ||
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| + | We were able to determine the optimum quad settings, set the detector HV and perform the collimator scan pretty quickly. | ||
<b>January 18, 2020</b> [https://logbooks.jlab.org/entry/3766402 summary] | <b>January 18, 2020</b> [https://logbooks.jlab.org/entry/3766402 summary] | ||
Revision as of 13:04, 16 August 2020
Moller measurement summaries for A1n/d2n
This is the "Cliff notes section on Moller polarimetry runs during the Polarized Helium-3 Running.
December 12, 2019summary
Five pass commissioning. Used preliminary <azz>. Randoms were higher than expected. Need more shielding?
December 19, 2019summary
We were able to determine the optimum quad settings, set the detector HV and perform the collimator scan pretty quickly.
January 18, 2020 summary
Before this measurement, timed in randoms so that right arm comes exactly 16 ns after left. [1]. During measurement, replaced 8 ns with 6 ns delay on left arm. Reduced left/right HV by 25 V (1245/1225). Ran with collimator 5 in - this reduced backgrounds a little. Q2/Q3 current changed to 1284.604 A. Bleedthrough check, ~ 10 nA. [2] Settings: [3]: [4] BPMs: [5]
January 27, 2020 summary,
Moller tune check and collimator settings[6].The beam current was 1 uA and IHWP IN. During the first three runs (1385-1387), Hall A was changing their slit and attenuator. During the last 3 runs(1388-1390),had the same slit settings. Moller measurement results[7] , BPMs:[8]
February 3, 2020summary Spin Dance
February 12, 2020 summary
February 19, 2020 summary
February 27, 2020 summary
March 6th, 2020 summary
March 12th, 2020 summary
August 3rd, 2020 summary
August 12th, 2020 summary
Table of good Moller runs
This will be a log of all "good" Moller runs; ie, our "production" runs. It will include some detailed notes when necessary.
Date Run Pol (%) Error (%) Hwien Flip Energy(MeV) Comment 01/18/20 1366 -29.64 right 10.3857 Detector Tune Check 1368 86.31 0.98 -29.64 right 10.3857 Production IHWP OUT 1369 85.23 0.98 -29.64 right 10.3857 Production IHWP OUT 1370 86.53 1.49 -29.64 right 10.3857 Production IHWP OUT 1371 -86.05 0.90 -29.64 right 10.3857 Production IHWP IN 1372 -85.69 0.99 -29.64 right 10.3857 Production IHWP IN 1374 -86.44 1.06 -29.64 right 10.3857 Production IHWP IN 1375 -84.96 1.79 -29.64 right 10.3857 Production IHWP IN 1376 -83.91 1.55 -29.64 right 10.3857 Production IHWP IN 1377 -85.18 1.60 -29.64 right 10.3857 Production IHWP IN 1378 -85.74 0.96 -29.64 right 10.3857 Production IHWP IN
