Difference between revisions of "Quad Tuning 1pass 48d"

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(Procedure without Sieve-slit)
(Procedure without Sieve-slit)
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[[Right HRS Quad Tuning Plan]]
 
[[Right HRS Quad Tuning Plan]]
 
* <b>Right-HRS Kinematics: 1st Pass (E<SUB>beam</SUB> = 2.2 GeV)</b> <br>
 
<table border="1"  style="width:80%">
 
  <tr>
 
    <td>E<SUB>beam</SUB> [GeV]</td>
 
    <td>P<sub>0</sub> [GeV/c]</td>
 
    <td>&theta;<SUB>e</SUB> [deg]</td>
 
    <td>Q<SUP>2</SUP> [GeV<SUP>2</SUP>]</td>
 
    <td>W [GeV]</td>
 
    <td> Rate [Hz] at 20 &mu;A</td>
 
    <td> minutes for 71k events at 20 &mu;A</td>
 
  </tr>
 
  <tr>
 
    <td>2.217</td>
 
    <td>0.85</td>
 
    <td>48.75</td>
 
    <td>1.28</td>
 
    <td>1.47</td>
 
    <td>119</td>
 
    <td>10</td>
 
  </tr>
 
</table>
 
 
We want to take runs with the following Q1 currents:
 
<ol>
 
<li>  0%:  173.825 A</li>
 
<li> -10%: 156.443 A</li>
 
<li> -5%:  165.134 A</li>
 
<li> -2%:  170.349 A</li>
 
<li> +2%:  177.302 A</li>
 
<li> +5%:  182.516 A</li>
 
<li> +10%: 191.208 A</li> 
 
</ol>
 

Revision as of 19:52, 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:

  1. 0%: 204.5 A
  2. -10%: 184.05 A
  3. -5%: 194.275 A
  4. -2%: 200.41 A
  5. +2%: 208.59 A
  6. +5%: 214.725 A
  7. +10%: 224.95 A

Right HRS Quad Tuning Plan