Difference between revisions of "Parasitic Production Run Plan R-HRS 48.75 degrees"

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(Proton Elastic Kinematics)
Line 19: Line 19:
 
     <td>E<SUB>beam</SUB> [GeV]</td>
 
     <td>E<SUB>beam</SUB> [GeV]</td>
 
     <td>P<sub>0</sub> [GeV/c]</td>
 
     <td>P<sub>0</sub> [GeV/c]</td>
 +
    <td>Q1 Current [Amps]</td>
 
     <td>&theta;<SUB>e</SUB> [deg]</td>
 
     <td>&theta;<SUB>e</SUB> [deg]</td>
 
     <td>Q<SUP>2</SUP> [GeV<SUP>2</SUP>]</td>
 
     <td>Q<SUP>2</SUP> [GeV<SUP>2</SUP>]</td>
Line 29: Line 30:
 
     <td>8.517</td>
 
     <td>8.517</td>
 
     <td>1.804</td>
 
     <td>1.804</td>
 +
    <td>361.54</td>
 
     <td>53.47</td>
 
     <td>53.47</td>
 
     <td>12.56</td>
 
     <td>12.56</td>
Line 39: Line 41:
 
     <td>8.517</td>
 
     <td>8.517</td>
 
     <td>1.804</td>
 
     <td>1.804</td>
 +
    <td> 361.54 </td>
 
     <td>53.47</td>
 
     <td>53.47</td>
 
     <td>12.56</td>
 
     <td>12.56</td>
Line 49: Line 52:
 
     <td>8.517</td>
 
     <td>8.517</td>
 
     <td>0.85</td>
 
     <td>0.85</td>
 +
    <td>170.35</td>
 
     <td>53.47</td>
 
     <td>53.47</td>
 
     <td>5.86</td>
 
     <td>5.86</td>
Line 64: Line 68:
 
     <td>E<SUB>beam</SUB> [GeV]</td>
 
     <td>E<SUB>beam</SUB> [GeV]</td>
 
     <td>P<sub>0</sub> [GeV/c]</td>
 
     <td>P<sub>0</sub> [GeV/c]</td>
 +
    <td> Q1 current [Amps]</td>
 
     <td>&theta;<SUB>e</SUB> [deg]</td>
 
     <td>&theta;<SUB>e</SUB> [deg]</td>
 
     <td>Q<SUP>2</SUP> [GeV<SUP>2</SUP>]</td>
 
     <td>Q<SUP>2</SUP> [GeV<SUP>2</SUP>]</td>
Line 73: Line 78:
 
     <td>2 x 2  mm<sup>2</sup></td>
 
     <td>2 x 2  mm<sup>2</sup></td>
 
     <td>10.617</td>
 
     <td>10.617</td>
     <td>1.896</td>
+
     <td>1.896</td>
 +
    <td>379.98</td>
 
     <td>53.25</td>
 
     <td>53.25</td>
 
     <td>16.33</td>
 
     <td>16.33</td>
Line 84: Line 90:
 
     <td>10.617</td>
 
     <td>10.617</td>
 
     <td>1.896</td>
 
     <td>1.896</td>
 +
    <td>379.98</td>
 
     <td>53.25</td>
 
     <td>53.25</td>
 
     <td>16.33</td>
 
     <td>16.33</td>
Line 94: Line 101:
 
     <td>10.617</td>
 
     <td>10.617</td>
 
     <td>0.85</td>
 
     <td>0.85</td>
 +
    <td>170.35</td>
 
     <td>53.25</td>
 
     <td>53.25</td>
 
     <td>7.24</td>
 
     <td>7.24</td>

Revision as of 17:12, 31 October 2016

Proton Elastic Kinematics

* If you need to increase the spectrometer momentum setting, make sure you cycle Q2 and Q3 as per the cycling procedure.
* Elastic electron rates assume 15 μA on 15 cm LH2 target, 5 mSr acceptance.
* Use the following prescale factors: ps1=1, ps2=1, ps3=1, ps8=100. All other triggers should have zero prescale factor.
* For the optics pointing run, decrease the spectrometer momentum to 0.85 GeV/c.  The right dipole will need about 1.5 hours to settle.
* Take one hour on the optics target.
* After the optics run is completed, then increase the spectrometer momentum back to the elastic setting.  
Make sure to cycle the right Q2 and Q3 when increasing the momentum. * The 15 cm dummy runs need to be taken at the elastic setting. So keep the momentum as is for this run. * A GMp expert will check the data quality.


  • 4th Pass (Ebeam = 8.5 GeV) Time estimate: 19 days @ 15 μA
Target Raster Ebeam [GeV] P0 [GeV/c] Q1 Current [Amps] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 15 μA PAC days at 15 μA
15 cm LH2 2 x 2 mm2 8.517 1.804 361.54 53.47 12.56 0.011 19 (for 17k events)
15 cm Dummy 2 x 2 mm2 8.517 1.804 361.54 53.47 12.56 ---- 1 hour
Single Carbon Off 8.517 0.85 170.35 53.47 5.86 0.83 1 hour (for 3k events)


  • 5th Pass (Ebeam = 10.6 GeV) Time estimate: 22 days @ 15 μA
Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [Amps] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 15 μA PAC days at 15 μA
15 cm LH2 2 x 2 mm2 10.617 1.896 379.98 53.25 16.33 0.002 22 (for 3.6k events)
15 cm Dummy 2 x 2 mm2 10.617 1.896 379.98 53.25 16.33 ---- 1 hour
Single Carbon Off 10.617 0.85 170.35 53.25 7.24 0.69 1 hour (for 2.5k events)