Difference between revisions of "SRC/CT Run Plan"
From GlueXWiki
(→2. Prior to beam activities) |
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| 10 days | | 10 days | ||
| 140 nA | | 140 nA | ||
+ | |} | ||
+ | |||
+ | ==General Conditions== | ||
+ | |||
+ | The following numbers were taken from the [https://halldweb.jlab.org/hdops/wiki/index.php/Standard_Production_Running_Conditionsstandard production running conditions]. | ||
+ | |||
+ | Numbers need to be updated for our run. | ||
+ | |||
+ | {| border | ||
+ | |- | ||
+ | ! Item !! Polarized Beam | ||
+ | |- | ||
+ | | Beam Current || 140 nA | ||
+ | |- | ||
+ | | Active Collimator (Inner) optimal coordinates || x = 1.0 mm, y = −0.2 mm | ||
+ | |- | ||
+ | | BPM (IPM5C11B) optimal coordinates || x = −0.5 mm, y = +1.0 mm | ||
+ | |- | ||
+ | | Tagger Quadrupole (MQPAD00) Current || −4.2 A | ||
+ | |- | ||
+ | | Tagger Magnet Current || 208.4 A | ||
+ | |- | ||
+ | | Radiator || JD70-105, 47 μm | ||
+ | |- | ||
+ | | Coherent Peak Position || 8600 ± 10 MeV | ||
+ | |- | ||
+ | | Beam Profiler || retracted | ||
+ | |- | ||
+ | | Collimator || 5.0 mm | ||
+ | |- | ||
+ | | TPol target || Be 75 μm | ||
+ | |- | ||
+ | | Pair Spect. Convertor || retracted | ||
+ | |- | ||
+ | | Pair Spect. Magnet Current (set point) || 910 A | ||
+ | |- | ||
+ | | GlueX Solenoid || 1350 A | ||
+ | |- | ||
+ | | TAC || retracted | ||
|} | |} | ||
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* Hall D techs Ramp up the magnet | * Hall D techs Ramp up the magnet | ||
− | === 2. | + | === 2. Calibration before production runs === |
* Establish typical tagged photon beam | * Establish typical tagged photon beam |
Revision as of 10:10, 27 August 2021
Tentative Schedule
Activity | Time | Beam Conditions |
---|---|---|
Target change C ladder |
3 shifts | no beam |
Detector and DAQ checkout | 2 shifts | 140 nA |
Luminosity Scan | 1 shift | Varies |
Run with C target |
20 days | 140 nA |
Compton running for density checks | 1 shift | |
Target change to 4He | 5 shifts | |
Compton running for density checks | 1-2 shift | |
Run with 4He | 10 days | 140 nA |
Empty Cell Run | 1 shift | 140 nA |
Target change to D | 3 shifts | |
Run D | 8 days | 140 nA |
Target change to Cu | 5 shifts | |
Run with Cu | 10 days | 140 nA |
General Conditions
The following numbers were taken from the production running conditions.
Numbers need to be updated for our run.
Item | Polarized Beam |
---|---|
Beam Current | 140 nA |
Active Collimator (Inner) optimal coordinates | x = 1.0 mm, y = −0.2 mm |
BPM (IPM5C11B) optimal coordinates | x = −0.5 mm, y = +1.0 mm |
Tagger Quadrupole (MQPAD00) Current | −4.2 A |
Tagger Magnet Current | 208.4 A |
Radiator | JD70-105, 47 μm |
Coherent Peak Position | 8600 ± 10 MeV |
Beam Profiler | retracted |
Collimator | 5.0 mm |
TPol target | Be 75 μm |
Pair Spect. Convertor | retracted |
Pair Spect. Magnet Current (set point) | 910 A |
GlueX Solenoid | 1350 A |
TAC | retracted |
Detailed Activities
1. Prior to beam activities
Estimated time (3 -4 Shifts: 1 Day)
- With Radcon support, Hall D techs uncable and remove start counter from cryostat
- With Radcon support, Target Group secures target gas, inerts the target piping, and bleeds vacuum chamber to atmospheric pressure
- With Radcon support, Target Group removes foam portion of cryostat
- With Radcon support, Target Group removes foam portion of cryostat
- With Radcon support, Target Group removes superinsulation around target cell
- With Radcon support, Target Group removes target cell
- With Radcon support, Target Group mounts Carbon ladder in place of the gas cell
- With Radcon support, Target Group, Foam portion of cryostat is put back in place, vacuum pumps on
- With Radcon support, Hall D techs Start counter put back in place, cables attached
- With Radcon support, Hall D techs Target inserted into solenoid
- Survey adjusts position in solenoid
- Hall D techs Beamline assembled and pump
- Hall D techs Ramp up the magnet
2. Calibration before production runs
- Establish typical tagged photon beam
- Harp scans for the electron Beam (and PS)
- Initial detector check out
- Equalize CCAL gains (calibrate CCAL)
- TAC run
Loading Liquid Targets
Contact | Details | |
---|---|---|
Disassemble beam pipe Retract target Remove ST Remove Gluex Cell |
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Mount target cell Mount heat shield |
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Survey | ||
Attach vacuum snout Attach ST Target in place Assemble beam pipe Pump vacuum in the target ladder |
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Ramp Magnet up |
Loading Solid Targets
Contact | Details | |
---|---|---|
Disassemble beam pipe Retract target Remove ST Remove Gluex Cell |
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Mount C foil ladder | ||
Survey | ||
Attach vacuum snout Attach ST Target in place Assemble beam pipe Pump vacuum in the target ladder |
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Ramp Magnet up |