Difference between revisions of "E12-09-017 Run Plan"

Revision as of 16:53, 9 April 2018

E12-09-017 Run Plan

Goal of the experiment is to measure the pt-dependence of SIDIS from proton, deuteron, and aluminum targets, for final state pi+, pi-, K+, and K-. The goal is to measure absolute cross sections with particular attention to achieving small errors on the ratios of cross sections for different final states and targets. The beam single-spin asymmetry will also be measured at the settings with sufficient phi coverage.

Beam energy: 10.6 GeV

HMS spectrometer will be detecting electrons.

SHMS Spectrometer will run both positive and negative pi/K

Trigger: main trigger is 3/4 Hodo in HMS in coincidence with 3/4 Hodo in SHMS (same as for CT experiment). We will also trigger on HMS singles with a pre-scle factor. We will also have some EDT triggers.

Beam current: For most settings we can hopefully take 55 to 60 muA beam current. At SHMS forward angles, we will have to run at lower currents in order to keep the DC rates below 500 KHz and the real/accidentals ratio less than 1 to 1.

Targets: LH2, LD2, dummy

Run time: Except for the low current runs, the goal is to collect about 150 mC of charge for each of LH2 and LD2, using three runs lasting about 20 minutes each. It is acceptable to be within 20% of the goal (so anywhere from 120 to 180 mC is ok for the nominal 150 mC runs). For the lower current runs, the goal is 150 mC times square root of the cuurent used divided by 40 muA. So for 10 muA, the goal is 300 mC.

The dummy runs should be for half the length of each of the liquid target runs (so about 75 mC in except for the low current runs).

Kinematic points (in order, except as end of run approaches, try to make sure each point has both positive and negative SHMS polarity).

set SHMS to positive polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current   Run    Charge
 5.3  13.5  0.31  3.10  12.0  5.05  0.90 -0.06  1.16  40.0  
 5.3  13.5  0.31  3.10  12.0  3.37  0.60 -0.04  3.35  40.0
 5.3  13.5  0.31  3.10   8.0  2.53  0.45 -0.21  4.35  13.5
 5.3  13.5  0.31  3.10  10.0  2.53  0.45 -0.12  4.41  22.8
 5.3  13.5  0.31  3.10  12.0  2.53  0.45 -0.03  4.44  39.6
 5.3  13.5  0.31  3.10  14.0  2.53  0.45  0.06  4.44  40.0
 5.3  13.5  0.31  3.10  16.0  2.53  0.45  0.15  4.40  40.0
 5.3  13.5  0.31  3.10  18.0  2.53  0.45  0.23  4.32  40.0
 5.3  13.5  0.31  3.10  20.0  2.53  0.45  0.32  4.21  40.0
 5.3  13.5  0.31  3.10  22.0  2.53  0.45  0.41  4.07  40.0
 5.3  13.5  0.31  3.10  24.0  2.53  0.45  0.50  3.89  40.0
 5.3  13.5  0.31  3.10  26.0  2.53  0.45  0.58  3.68  40.0

Switch SHMS to negative polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.3  13.5  0.31  3.10  12.0  5.05  0.90 -0.06  1.16  40.0
 5.3  13.5  0.31  3.10  12.0  3.37  0.60 -0.04  3.35  40.0
 5.3  13.5  0.31  3.10   8.0  2.53  0.45 -0.21  4.35  13.5
 5.3  13.5  0.31  3.10  10.0  2.53  0.45 -0.12  4.41  22.8
 5.3  13.5  0.31  3.10  12.0  2.53  0.45 -0.03  4.44  39.6
 5.3  13.5  0.31  3.10  14.0  2.53  0.45  0.06  4.44  40.0
 5.3  13.5  0.31  3.10  16.0  2.53  0.45  0.15  4.40  40.0
 5.3  13.5  0.31  3.10  18.0  2.53  0.45  0.23  4.32  40.0
 5.3  13.5  0.31  3.10  20.0  2.53  0.45  0.32  4.21  40.0
 5.3  13.5  0.31  3.10  22.0  2.53  0.45  0.41  4.07  40.0
 5.3  13.5  0.31  3.10  24.0  2.53  0.45  0.50  3.89  40.0
 5.3  13.5  0.31  3.10  26.0  2.53  0.45  0.58  3.68  40.0

Lower SHMS momentum: keep negative polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.3  13.5  0.31  3.10   8.0  1.96  0.35 -0.16  5.09  10.1
 5.3  13.5  0.31  3.10  10.0  1.96  0.35 -0.09  5.14  15.0
 5.3  13.5  0.31  3.10  12.0  1.96  0.35 -0.02  5.16  22.8
 5.3  13.5  0.31  3.10  14.0  1.96  0.35  0.04  5.16  35.2
 5.3  13.5  0.31  3.10  16.0  1.96  0.35  0.11  5.13  40.0
 5.3  13.5  0.31  3.10  18.0  1.96  0.35  0.18  5.07  40.0
 5.3  13.5  0.31  3.10  20.0  1.96  0.35  0.25  4.98  40.0
 5.3  13.5  0.31  3.10  22.0  1.96  0.35  0.32  4.87  40.0
 5.3  13.5  0.31  3.10  24.0  1.96  0.35  0.39  4.74  40.0
 5.3  13.5  0.31  3.10  26.0  1.96  0.35  0.45  4.57  40.0
 5.3  13.5  0.31  3.10  28.0  1.96  0.35  0.52  4.38  40.0
 5.3  13.5  0.31  3.10  30.0  1.96  0.35  0.58  4.17  40.0

Switch SHMS to positive polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.3  13.5  0.31  3.10   8.0  1.96  0.35 -0.16  5.09  10.1
 5.3  13.5  0.31  3.10  10.0  1.96  0.35 -0.09  5.14  15.0
 5.3  13.5  0.31  3.10  12.0  1.96  0.35 -0.02  5.16  22.8
 5.3  13.5  0.31  3.10  14.0  1.96  0.35  0.04  5.16  35.2
 5.3  13.5  0.31  3.10  16.0  1.96  0.35  0.11  5.13  40.0
 5.3  13.5  0.31  3.10  18.0  1.96  0.35  0.18  5.07  40.0
 5.3  13.5  0.31  3.10  20.0  1.96  0.35  0.25  4.98  40.0
 5.3  13.5  0.31  3.10  22.0  1.96  0.35  0.32  4.87  40.0
 5.3  13.5  0.31  3.10  24.0  1.96  0.35  0.39  4.74  40.0
 5.3  13.5  0.31  3.10  26.0  1.96  0.35  0.45  4.57  40.0
 5.3  13.5  0.31  3.10  28.0  1.96  0.35  0.52  4.38  40.0
 5.3  13.5  0.31  3.10  30.0  1.96  0.35  0.58  4.17  40.0

ange HMS momentum to 5.9 GeV, keep SHMS positive polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.9  13.5  0.40  3.50  16.0  4.52  0.90 -0.01  0.91  40.0
 5.9  13.5  0.40  3.50  16.0  3.01  0.60 -0.00  2.63  40.0
 5.9  13.5  0.40  3.50   8.0  2.41  0.48 -0.34  3.08  12.6
 5.9  13.5  0.40  3.50  10.0  2.41  0.48 -0.25  3.19  20.8
 5.9  13.5  0.40  3.50  12.0  2.41  0.48 -0.17  3.26  35.1
 5.9  13.5  0.40  3.50  14.0  2.41  0.48 -0.09  3.31  40.0
 5.9  13.5  0.40  3.50  16.0  2.41  0.48 -0.00  3.32  40.0
 5.9  13.5  0.40  3.50  18.0  2.41  0.48  0.08  3.31  40.0
 5.9  13.5  0.40  3.50  20.0  2.41  0.48  0.17  3.26  40.0
 5.9  13.5  0.40  3.50  22.0  2.41  0.48  0.25  3.19  40.0
 5.9  13.5  0.40  3.50  24.0  2.41  0.48  0.33  3.09  40.0
 5.9  13.5  0.40  3.50  26.0  2.41  0.48  0.42  2.96  40.0
 5.9  13.5  0.40  3.50  28.0  2.41  0.48  0.50  2.80  40.0
 5.9  13.5  0.40  3.50  30.0  2.41  0.48  0.58  2.61  40.0

Switch SHMS to negative polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.9  13.5  0.40  3.50  16.0  4.52  0.90 -0.01  0.91  40.0
 5.9  13.5  0.40  3.50  16.0  3.01  0.60 -0.00  2.63  40.0
 5.9  13.5  0.40  3.50   8.0  2.41  0.48 -0.34  3.08  12.6
 5.9  13.5  0.40  3.50  10.0  2.41  0.48 -0.25  3.19  20.8
 5.9  13.5  0.40  3.50  12.0  2.41  0.48 -0.17  3.26  35.1
 5.9  13.5  0.40  3.50  14.0  2.41  0.48 -0.09  3.31  40.0
 5.9  13.5  0.40  3.50  16.0  2.41  0.48 -0.00  3.32  40.0
 5.9  13.5  0.40  3.50  18.0  2.41  0.48  0.08  3.31  40.0
 5.9  13.5  0.40  3.50  20.0  2.41  0.48  0.17  3.26  40.0
 5.9  13.5  0.40  3.50  22.0  2.41  0.48  0.25  3.19  40.0
 5.9  13.5  0.40  3.50  24.0  2.41  0.48  0.33  3.09  40.0
 5.9  13.5  0.40  3.50  26.0  2.41  0.48  0.42  2.96  40.0
 5.9  13.5  0.40  3.50  28.0  2.41  0.48  0.50  2.80  40.0
 5.9  13.5  0.40  3.50  30.0  2.41  0.48  0.58  2.61  40.0

Lower SHMS momentum: keep negative polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.9  13.5  0.40  3.50   8.0  2.01  0.40 -0.28  3.58  10.3
 5.9  13.5  0.40  3.50  10.0  2.01  0.40 -0.21  3.66  15.5
 5.9  13.5  0.40  3.50  12.0  2.01  0.40 -0.14  3.72  23.7
 5.9  13.5  0.40  3.50  14.0  2.01  0.40 -0.07  3.76  37.1
 5.9  13.5  0.40  3.50  16.0  2.01  0.40 -0.00  3.78  40.0
 5.9  13.5  0.40  3.50  18.0  2.01  0.40  0.07  3.76  40.0
 5.9  13.5  0.40  3.50  20.0  2.01  0.40  0.14  3.73  40.0
 5.9  13.5  0.40  3.50  22.0  2.01  0.40  0.21  3.67  40.0
 5.9  13.5  0.40  3.50  24.0  2.01  0.40  0.28  3.58  40.0
 5.9  13.5  0.40  3.50  26.0  2.01  0.40  0.35  3.47  40.0
 5.9  13.5  0.40  3.50  28.0  2.01  0.40  0.42  3.34  40.0
 5.9  13.5  0.40  3.50  30.0  2.01  0.40  0.48  3.18  40.0
 5.9  13.5  0.40  3.50  32.0  2.01  0.40  0.55  3.00  40.0

Switch SHMS to positive polarity

P_HMS TH_HMS   x    Q2 TH_SHMS P_SHMS  z   p_t  W'2  current
 5.9  13.5  0.40  3.50   8.0  2.01  0.40 -0.28  3.58  10.3
 5.9  13.5  0.40  3.50  10.0  2.01  0.40 -0.21  3.66  15.5
 5.9  13.5  0.40  3.50  12.0  2.01  0.40 -0.14  3.72  23.7
 5.9  13.5  0.40  3.50  14.0  2.01  0.40 -0.07  3.76  37.1
 5.9  13.5  0.40  3.50  16.0  2.01  0.40 -0.00  3.78  40.0
 5.9  13.5  0.40  3.50  18.0  2.01  0.40  0.07  3.76  40.0
 5.9  13.5  0.40  3.50  20.0  2.01  0.40  0.14  3.73  40.0
 5.9  13.5  0.40  3.50  22.0  2.01  0.40  0.21  3.67  40.0
 5.9  13.5  0.40  3.50  24.0  2.01  0.40  0.28  3.58  40.0
 5.9  13.5  0.40  3.50  26.0  2.01  0.40  0.35  3.47  40.0
 5.9  13.5  0.40  3.50  28.0  2.01  0.40  0.42  3.34  40.0
 5.9  13.5  0.40  3.50  30.0  2.01  0.40  0.48  3.18  40.0
 5.9  13.5  0.40  3.50  32.0  2.01  0.40  0.55  3.00  40.0

@@ Line 10: / Line 10: @@
 SHMS Spectrometer will run both positive and negative pi/K
-Trigger: main trigger is Electron_lo in HMS in coincidence
-   with 3/4 scintillator in SHMS, with a time window adjusted
+Trigger: main trigger is 3/4 Hodo in HMS in coincidence
-   as short as possible without loosing efficiency.
+with 3/4 Hodo in SHMS (same as for CT experiment). We will also trigger on HMS singles with a pre-scle factor. We will also have some EDT triggers.
-   Should also have HMS Electron_lo single arm trigger,
-   SHMS Electron_lo and 3/4 scin. single arm triggers with
+Beam current: For most settings we can hopefully take 55 to 60 muA beam current. At SHMS forward angles, we will have to run at lower currents in order to keep the DC rates below 500 KHz and the real/accidentals ratio less than 1 to 1.
-   prescale factors that give small (<100 Hz) rates
-Beam current: between 10 and 40 microamps. keep real/accidentals 1:1
-   or better on the LD2 target if possible, and singles rates in SHMS
-   below 500 KHz. Best guess starting values are in the table
-   below.
 Targets: LH2, LD2, dummy
-Run time: Collect 140 mC of charge for each of LH2 and LD2,
-to first order, ~1 hour good quality beam for each cryo target,
+Run time: Except for the low current runs, the goal is to collect about 150 mC of charge for each of LH2 and LD2,
-and 30 minutes for dummy for each kinematic point
+using three runs lasting about 20 minutes each. It is acceptable to be within 20% of the goal (so anywhere from 120 to 180 mC is ok for the nominal 150 mC runs). For the lower current runs, the goal is 150 mC times square root of the cuurent used divided by 40 muA. So for 10 muA, the goal is 300 mC.
+The dummy runs should be for half the length of each of the liquid target runs (so about 75 mC in except for the low current runs).
 Kinematic points (in order, except as end of run approaches,

Difference between revisions of "E12-09-017 Run Plan"

Revision as of 16:53, 9 April 2018

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