Difference between revisions of "Pol He3 Target Meeting May 11, 2020"
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(Created page with "<b> Members present: Jian-ping, Arun, Bill, Murchhana, Mingyu, Todd, Melanie, Junhao, Brad, Christopher </b> Jian-ping *We need to think of things that to be done to prepare...") |
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| − | *We need to think of things that to be done to prepare for d2n running once the lab reopens, and add it to the “punch list”: https://hallcweb.jlab.org/wiki/index.php/PolHe3_Punch_List_For_Restart. We'll discuss it in detail next week as a group | + | *We need to think of things that to be done to prepare for d2n running once the lab reopens, and add it to the “punch list”: https://hallcweb.jlab.org/wiki/index.php/PolHe3_Punch_List_For_Restart. |
| + | *We'll discuss it in detail next week as a group | ||
Junhao | Junhao | ||
Latest revision as of 14:59, 11 May 2020
Members present: Jian-ping, Arun, Bill, Murchhana, Mingyu, Todd, Melanie, Junhao, Brad, Christopher
Jian-ping
- We need to think of things that to be done to prepare for d2n running once the lab reopens, and add it to the “punch list”: https://hallcweb.jlab.org/wiki/index.php/PolHe3_Punch_List_For_Restart.
- We'll discuss it in detail next week as a group
Junhao
- Working on the temperature test data and remaining AFP loss studies (it varies so much with changing conditions, there's still a lot of work to do)
- Will present an update next week
- We need to be able to remotely monitor the spectro-analyzer in the transverse direction, since it’s especially important for d2n. We already have a fiber for it and in the process of getting a quote for another spectro-analyzer
Murchhana
- Emailed Chris regarding the uncertainties in the survey coordinates. He said the uncertainties for the points on the beamline (where the compass is located) is +/- 0.28 mm and +/- 0.5 mm for the mapper points
Christopher
- Currently holding onto new cells Butterball and Tommy for wall thickness measurements and some spectroscopy. Can do all of that before JLab is ready for the cells
Melanie
- Presented two methods used to determine statistical uncertainties on the frequency shifts in the EPR analyses
- Method used in Xiaochao's thesis is the correct one, since the error shouldn't grow with the number of measurements performed
- Will write a short simulation to replicate the data points as a brute-force method to extract the uncertainties as a cross-check, as per Brad's suggestion
- The systematic uncertainties need to be studied carefully for cases where the field was unstable, the cell was pumping up, etc. like the case for Big Brother on 2/13 right after the cell-swap
