Difference between revisions of "Quad Tuning 1pass 48d"
From Hall A Wiki
(→Procedure without Sieve-slit) |
(→Procedure without Sieve-slit) |
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We want to take runs with the following Q1 currents: | We want to take runs with the following Q1 currents: | ||
<ol> | <ol> | ||
| − | <li> 0%: | + | <li> 0%: 204.5 A</li> |
| − | <li> - | + | <li> -10%: 184.05 A</li? |
| − | <li> -5%: | + | <li> -5%: 194.275 A</li> |
| − | <li> - | + | <li> -2%: 200.41 A</li> |
| − | <li> | + | <li> +2%: 208.59 A</li> |
| − | <li> +5%: | + | <li> +5%: 214.725 A</li> |
| + | <li> +10%: 224.95 A</li> | ||
</ol> | </ol> | ||
| Line 67: | Line 68: | ||
We want to take runs with the following Q1 currents: | We want to take runs with the following Q1 currents: | ||
<ol> | <ol> | ||
| − | <li> 0%: | + | <li> 0%: 173.825 A</li> |
| − | <li> - | + | <li> -10%: 156.443 A</li> |
| − | <li> -5%: | + | <li> -5%: 165.134 A</li> |
| − | <li> - | + | <li> -2%: 170.349 A</li> |
| − | <li> | + | <li> +2%: 177.302 A</li> |
| − | <li> +5%: | + | <li> +5%: 182.516 A</li> |
| + | <li> +10%: 191.208 A</li> | ||
</ol> | </ol> | ||
Revision as of 12:08, 10 October 2016
Procedure without Sieve-slit
- Kinematics need to be updated!
- Time estimate: 1-2 hours
* Take a run at the following kinematics without the sieve-slit collimator. * Start with initial HRS spectrometer tunes for the left and right arms with the new quads in place of Q1s. * If you need to increase the spectrometer momentum setting, make sure you cycle Q2 and Q3 as per the cycling procedure. * Electron rates assume 9 out of 11 carbon foils, 5 mSr acceptance, and 8% delta acceptance. * A GMp expert will check the data quality and decide, if the HRS tunes need to be adjusted to change the size of the acceptance. * This process will be repeated until the spectrometer tune is satisfactory.
- Left-HRS Kinematics: 1st Pass (Ebeam = 2.2 GeV)
| Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Q2 [GeV2] | W [GeV] | Rate [Hz] at 20 μA | minutes for 2M events at 20 μA |
| 2.217 | 1.0 | 17.5 | 0.20 | 1.72 | 9800 (3260 Hz with ps = 3) | 10 |
We want to take runs with the following Q1 currents:
- 0%: 204.5 A
- -10%: 184.05 A</li?
- -5%: 194.275 A
- -2%: 200.41 A
- +2%: 208.59 A
- +5%: 214.725 A
- +10%: 224.95 A
- Right-HRS Kinematics: 1st Pass (Ebeam = 2.2 GeV)
| Ebeam [GeV] | P0 [GeV/c] | θe [deg] | Q2 [GeV2] | W [GeV] | Rate [Hz] at 20 μA | minutes for 71k events at 20 μA |
| 2.217 | 0.85 | 48.75 | 1.28 | 1.47 | 119 | 10 |
We want to take runs with the following Q1 currents:
- 0%: 173.825 A
- -10%: 156.443 A
- -5%: 165.134 A
- -2%: 170.349 A
- +2%: 177.302 A
- +5%: 182.516 A
- +10%: 191.208 A
