Difference between revisions of "F2 Large x runplan: February 2019"
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! targets || 10 cm LH2, 10 cm LD2 10 cm Dummy, C, 10B4C, 11B4C | ! targets || 10 cm LH2, 10 cm LD2 10 cm Dummy, C, 10B4C, 11B4C | ||
|- | |- | ||
| − | + | ! trigger || ELREAL | |
|- | |- | ||
! SHMS collimator: || COLLIMATOR | ! SHMS collimator: || COLLIMATOR | ||
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! SHMS trigger: || ELREAL for physics data taking | ! SHMS trigger: || ELREAL for physics data taking | ||
|- | |- | ||
| − | ! SHMS angle/momentum: || 13. | + | ! SHMS angle/momentum: || 13.1 deg / -8.5 GeV/c |
|- | |- | ||
|} | |} | ||
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* Take ~1-2 hours of LH2 data to verify the position of the elastic peak at x=1. If not at x=1, correct count estimates to account for this. | * Take ~1-2 hours of LH2 data to verify the position of the elastic peak at x=1. If not at x=1, correct count estimates to account for this. | ||
| − | * Take data on C | + | * Take 1 hour of dummy data at 40 uA - determine yield (electrons/mC) for 1.5<x<1.9 |
| − | * | + | * Take LD2 data at 50 uA. After ~ 1 hour, estimate relative contribution of cell walls (~1/4 dummy thickness). Use this to estimate number of LD2 electrons needed. Should need about 4-5 hours. |
| − | + | * Take data on C at 50 uA. Target should take about 2.2 hours at 50 uA. | |
| + | * If time, take data on 10B4C, 11BC at 50 uA. Each target should take about 2.2 hours at 50 uA | ||
Latest revision as of 17:33, 14 February 2019
- Conditions: SHMS only.
| beam current (uA): | 50 uA |
|---|---|
| fast raster: | 2x2mm |
| targets | 10 cm LH2, 10 cm LD2 10 cm Dummy, C, 10B4C, 11B4C |
| trigger | ELREAL |
| SHMS collimator: | COLLIMATOR |
| SHMS trigger: | ELREAL for physics data taking |
| SHMS angle/momentum: | 13.1 deg / -8.5 GeV/c |
Goal is to obtain ~5000 electrons in the range 1.5<x<1.9 for each production target.
- Take ~1-2 hours of LH2 data to verify the position of the elastic peak at x=1. If not at x=1, correct count estimates to account for this.
- Take 1 hour of dummy data at 40 uA - determine yield (electrons/mC) for 1.5<x<1.9
- Take LD2 data at 50 uA. After ~ 1 hour, estimate relative contribution of cell walls (~1/4 dummy thickness). Use this to estimate number of LD2 electrons needed. Should need about 4-5 hours.
- Take data on C at 50 uA. Target should take about 2.2 hours at 50 uA.
- If time, take data on 10B4C, 11BC at 50 uA. Each target should take about 2.2 hours at 50 uA
