Difference between revisions of "SRC/CT Run Plan"
From GlueXWiki
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| TAC || retracted | | TAC || retracted | ||
|} | |} | ||
+ | |||
+ | ==Trigger Types== | ||
+ | |||
+ | The experiment will have physics and monitoring triggers in the data stream. | ||
+ | |||
+ | =* Physics trigger | ||
+ | |||
+ | |||
+ | {|border="1" cellpadding="5" cellspacing="0" align="center" | ||
+ | |- | ||
+ | ! | ||
+ | ! scope="column" | Trigger Type | ||
+ | ! scope="column" | Trigger Bit (starting from 1) | ||
+ | |- | ||
+ | ! Main Production trigger | ||
+ | ! FCAL + 0.5 BCAL > 0.5 GeV & ST | ||
+ | ! 1 | ||
+ | |- | ||
+ | ! | ||
+ | ! BCAL > 1.1 GeV | ||
+ | ! 3 | ||
+ | |- | ||
+ | ! Luminosity | ||
+ | ! PS | ||
+ | ! 4 | ||
+ | |} | ||
+ | |||
==Detailed Activities== | ==Detailed Activities== |
Revision as of 10:54, 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 |
Trigger Types
The experiment will have physics and monitoring triggers in the data stream.
=* Physics trigger
Trigger Type | Trigger Bit (starting from 1) | |
---|---|---|
Main Production trigger | FCAL + 0.5 BCAL > 0.5 GeV & ST | 1 |
BCAL > 1.1 GeV | 3 | |
Luminosity | PS | 4 |
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 |
||
Mount target cell Mount heat shield |
||
Survey | ||
Attach vacuum snout Attach ST Target in place Assemble beam pipe Pump vacuum in the target ladder |
||
Ramp Magnet up |
Loading Solid Targets
Contact | Details | |
---|---|---|
Disassemble beam pipe Retract target Remove ST Remove Gluex Cell |
||
Mount C foil ladder | ||
Survey | ||
Attach vacuum snout Attach ST Target in place Assemble beam pipe Pump vacuum in the target ladder |
||
Ramp Magnet up |