Pol He3 Target Meeting November 23, 2020
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Revision as of 15:40, 23 November 2020 by Mrehfuss (Talk | contribs) (Created page with "<b> Members present: Jian-ping, Arun, Bill, Murchhana, Mingyu, Melanie, Junhao, and Dave </b> Junhao *Working on deriving the target polarization per run. Need the following...")
Members present: Jian-ping, Arun, Bill, Murchhana, Mingyu, Melanie, Junhao, and Dave
Junhao
- Working on deriving the target polarization per run. Need the following quantities:
- NMR amplitude of last NMR measurement before the run
- EPR correction based on the current field direction and magnets condition
- Convection correction: target chamber polarization correction based on equilibrium condition
- AFP loss on target chamber
- pNMR loss on target chamber
- polarization-evolution-based correction:
- time: spin up time constant and observed polarization deterioration
- charge: accumulated charge on target since the last NMR measurement
- beam current
- special conditions: laser status, QWP status, etc
- AFP loss study done on longitudinal configuration with 6V convection heater; to get the true AFP loss, we need to also correct for the convection itself
