GMp Production Run Plan, Dedicated Time L-HRS and R-HRS

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Proton Elastic Kinematics

During each pass change, we require a spectrometer pointing survey for the Left HRS and sometimes for the Right HRS. 

* 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 60 μA on 15 cm LH2 target, 5 mSr acceptance. 

* Use the following prescale factors:
  ps1=1, ps2=1, ps3=1, ps8=100 for the Right HRS. 
  ps1=1, ps2=1, ps3=1, ps7=1, ps8=10000 for the Left HRS.
  All other triggers should have zero prescale factor. 

* For the carbon pointing run, decrease the spectrometer momentum for the left and right spectrometers to 1.0 GeV/c.
  The right dipole will need about 2-3 hours to settle. 

* Take a one hour run on the optics target. 

* After the carbon run is completed, then increase the spectrometer momentum back to the elastic setting.
  Again, the right dipole will need about 2-3 hours to settle 
  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. 
 
* We should take dummy target data to accumulate at least 10% of the LH2 statistics. 

* A GMp expert will check the data quality.


  • Left-HRS Kinematics: 4th Pass (Ebeam = 8.5 GeV)
    Time estimate: 8 days @ 60 μA
Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC days at 60 μA Real Time at 60 μA
K4-11 15 cm LH2 2 x 2 mm2 8.517 2.531 527.94 42.0 11.18 0.18 2.6 (for 40k events) N/A
K4-11 15 cm Dummy 2 x 2 mm2 8.517 2.531 527.94 42.0 11.18 ---- (@ 40 μA) N/A at least 1 hour
K4-11 Single Carbon Off 8.517 1.0 208.59 42.0 4.38 12.4 N/A 1 hour (for 44k events)


Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC days at 60 μA Real Time at 60 μA
K4-10 15 cm LH2 2 x 2 mm2 8.517 3.259 679.79 34.4 9.81 0.71 0.7 (for 40k events) N/A
K4-10 15 cm Dummy 2 x 2 mm2 8.517 3.259 679.79 34.4 9.81 0.26 (@ 40 μA) N/A at least 1 hour
K4-10 Single Carbon Off 8.517 1.0 208.59 34.4 2.98 34 N/A 0.5 hour (for 61k events)


Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC days at 60 μA Real Time at 60 μA
K4-9 15 cm LH2 2 x 2 mm2 8.517 3.685 768.65 30.9 9.0 1.6 0.3 (for 40k events) N/A
K4-9 15 cm Dummy 2 x 2 mm2 8.517 3.685 768.65 30.9 9.0 0.54 (@ 40 μA) N/A at least 1 hour
K4-9 Single Carbon Off 8.517 1.0 208.59 30.9 2.42 53 N/A 0.5 hour (for 95k events)


  • Right-HRS Kinematics: 4th Pass (Ebeam = 8.5 GeV)
    Time estimate: 8 days @ 60 μA
Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC days at 60 μA Real Time at 60 μA
K4-12 15 cm LH2 2 x 2 mm2 8.517 2.060 412.84 48.75 12.1 0.071 3.5 (for 21k events) N/A
K4-12 15 cm Dummy 2 x 2 mm2 8.517 2.060 412.84 48.75 12.1 ---- (@ 40 μA) N/A at least 1 hour
K4-12 Single Carbon Off 8.517 1.0 200.41 48.75 5.80 4.5 N/A 1 hour (for 16k events)


  • Left-HRS Kinematics: 3rd Pass (Ebeam = 6.4 GeV)
    Time estimate: 3 days @ 60 μA
Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC hours at 60 μA Real Time at 60 μA
K3-6 15 cm LH2 2 x 2 mm2 6.417 3.224 672.49 30.9 5.93 14 1 (for 50k events) N/A
K3-6 15 cm Dummy 2 x 2 mm2 6.417 3.224 672.49 30.9 5.93 2.5 (@ 40 μA) N/A at least 1 hour
K3-6 Single Carbon Off 6.417 1.0 208.59 30.9 1.82 79 N/A 0.33 hour (for 90k events)



Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC hours at 60 μA Real Time at 60 μA
K3-8 15 cm LH2 2 x 2 mm2 6.417 2.145 447.42 44.5 8.0 1.0 11 (for 40k events) N/A
K3-8 15 cm Dummy 2 x 2 mm2 6.417 2.145 447.42 44.5 8.0 0.17 (@ 40 μA) N/A at least 1 hour
K3-8 Single Carbon Off 6.417 1.0 208.59 44.5 3.30 12 N/A 0.5 hour (for 32k events)


Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC hours at 60 μA Real Time at 60 μA
K3-7 15 cm LH2 2 x 2 mm2 6.417 2.672 557.35 37.0 7.0 3.7 3.0 (for 40k events) N/A
K3-7 15 cm Dummy 2 x 2 mm2 6.417 2.672 557.35 37.0 7.0 0.6 (@ 40 μA) N/A at least 1 hour
K3-7 Single Carbon Off 6.417 1.0 208.59 37.0 2.58 35 N/A 0.5 hour (for 60k events)


Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC hours at 60 μA Real Time at 60 μA
K3-4 15 cm LH2 2 x 2 mm2 6.417 3.962 826.43 24.25 4.5 101 0.17 (for 60k events) N/A
K3-4 15 cm Dummy 2 x 2 mm2 6.417 3.962 826.43 24.25 4.5 16.3 (@ 40 μA) N/A at least 1 hour
K3-4 Single Carbon Off 6.417 1.0 208.59 24.25 1.13 190 N/A 0.25 hour (for 170k events)



  • Right-HRS Kinematics: 3rd Pass (Ebeam = 6.4 GeV)
    Time estimate: 3 days @ 60 μA
Kinematic Target Raster Ebeam [GeV] P0 [GeV/c] Q1 current [A] θe [deg] Q2 [GeV2] Electron Rate [Hz] at 60 μA PAC hours at 60 μA Real Time at 60 μA
K3-9 15 cm LH2 2 x 2 mm2 6.417 1.587 318.05 55.89 9.0 0.27 31 (for 30k events) N/A
K3-9 15 cm Dummy 2 x 2 mm2 6.417 1.587 318.05 55.89 9.0 0.05 (@ 40 μA) N/A at least 1 hour
K3-9 Single Carbon Off 6.417 1.0 200.41 55.89 5.56 2.3 N/A 1 hour (for 8k events)


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