Right Quad Tuning 2pass 48d

From Hall A Wiki
Revision as of 11:45, 26 September 2016 by Vasulk (Talk | contribs) (New page: ==== Procedure without Sieve-slit ==== * Time estimate: 2 hours * Take a run at the following kinematics without the sieve-slit collimator. * Start with initial right HRS spectrometer t...)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Procedure without Sieve-slit

  • Time estimate: 2 hours
* Take a run at the following kinematics without the sieve-slit collimator.
* Start with initial right HRS spectrometer tune with the SOS quad in place of right Q1.
* If you need to increase the spectrometer momentum setting, make sure you cycle Q2 and Q3 as per the cycling procedure.
* Electron rates assume 5 carbon foils, 5 mSr acceptance, and 8% delta acceptance.
* A GMp expert will check the data quality and decide, if the right HRS tune needs to be adjusted to change the size of the acceptance.
* This process will be repeated until the spectrometer tune is satisfactory.
Ebeam [GeV] P0 [GeV/c] θe [deg] Q2 [GeV2] W [GeV] Rate [Hz] at 5 μA minutes for 29k events at 5 μA
2.057 0.75 48.0 1.02 1.521 24.7 20

We want to take runs with the following Q1 currents:

  1. 0%: 159.75 A
  2. -6%: 150.165 A
  3. -5%: 151.7625 A
  4. -4%: 153.36 A
  5. -3%: 154.9575 A
  6. +5%: 167.7375 A