Difference between revisions of "Right Quad Tuning 2pass 48d"
From Hall A Wiki
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==== Procedure without Sieve-slit ==== | ==== Procedure without Sieve-slit ==== | ||
| + | * <b>Kinematics need to be updated!</b> | ||
* Time estimate: 2 hours | * Time estimate: 2 hours | ||
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</tr> | </tr> | ||
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| − | <td>2. | + | <td>2.217</td> |
<td>0.75</td> | <td>0.75</td> | ||
<td>48.0</td> | <td>48.0</td> | ||
Revision as of 11:47, 26 September 2016
Procedure without Sieve-slit
- Kinematics need to be updated!
- 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 new 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 7 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 |
| 2.217 | 0.75 | 48.0 | 1.02 | 1.521 | 24.7 | 20 |
We want to take runs with the following Q1 currents:
- 0%: 159.75 A
- -6%: 150.165 A
- -5%: 151.7625 A
- -4%: 153.36 A
- -3%: 154.9575 A
- +5%: 167.7375 A
