Difference between revisions of "Quad Tuning 1pass 48d"
From Hall A Wiki
(New page: ==== Procedure without Sieve-slit ==== * <b>Kinematics need to be updated!</b> * Time estimate: 1-2 hours * Take a run at the following kinematics without the sieve-slit collimator. * S...) |
(→Procedure without Sieve-slit) |
||
| (19 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
==== Procedure without Sieve-slit ==== | ==== Procedure without Sieve-slit ==== | ||
| − | |||
* Time estimate: 1-2 hours | * Time estimate: 1-2 hours | ||
* Take a run at the following kinematics without the sieve-slit collimator. | * Take a run at the following kinematics without the sieve-slit collimator. | ||
| − | * Start with initial | + | * 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. | * 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 | + | * Electron rates assume 9 carbon foils, 5 mSr acceptance, and 8% delta acceptance. |
| − | * <b>A GMp expert will check the data quality and decide, if the | + | * <b>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.</b> |
* This process will be repeated until the spectrometer tune is satisfactory.<br> | * This process will be repeated until the spectrometer tune is satisfactory.<br> | ||
| + | * <b>Right-HRS Kinematics: 1st Pass (E<SUB>beam</SUB> = 2.2 GeV)</b> <br> | ||
<table border="1" style="width:80%"> | <table border="1" style="width:80%"> | ||
<tr> | <tr> | ||
| Line 29: | Line 29: | ||
<td>10</td> | <td>10</td> | ||
</tr> | </tr> | ||
| − | </table> | + | </table><br> |
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> | ||
| + | |||
| + | <br> | ||
| + | [[Left HRS Quad Tuning Plan]] <b>(Already completed)</b> | ||
| + | |||
| + | [[Right HRS Quad Tuning Plan]] <b>(Only if right HRS magnets are working)</b> | ||
Latest revision as of 11:52, 14 October 2016
Procedure without Sieve-slit
- 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 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.
- 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
Left HRS Quad Tuning Plan (Already completed)
Right HRS Quad Tuning Plan (Only if right HRS magnets are working)
