SRC/CT Run Plan
From GlueXWiki
Plan for 8 Nov-6 Dec
Note that shifts here correspond to accelerator shifts.
See visually here
The standard configuration of the GlueX detector will be used during the SRC run
Activity | Time (shifts) | Beam current (nA) | Radiator (R.L.) | Comment |
---|---|---|---|---|
Liquid He target | ||||
Tune beam to tagger hall | 3 | |||
Ion chamber calibration Radiation monitor check |
0.6 | |||
Harp scan for electron beam | 0.2 | Establish photon beam | ||
Calib active collimator | 0.5 | |||
Align JD70 - 105 radiator | 1.5 | 4x10-4 | ||
Detector checkout, Trigger / DAQ tuning | 3 | 10 - 150 | same | |
Collect data in row mode | 0.1 | 10 - 150 | ||
Total | 2.5 days | |||
Production with 4He target |
48 ( 12 days ) 1 |
140 50 |
Insert CCAL, HV on for low-energy TAGH | |
Empty (He) target run | 2 | |||
Target change to D | 2.0 | |||
Production with D target | 8 (2 days) 1 |
140 50 |
Insert CCAL, HV on for low-energy TAGH | |
TAC run (use CCAL as TAC) | 2 shifts | < 5 | 2x10-5 | Empty liquid target |
Target change to C Ramp the solenoid magnet down Install and align target Compton run no field (optional) Ramp the magnet up |
1.25 1.5 0.5 1.25 |
- - 0.5 - |
- - 10-4 Amo - |
|
Production with C target | 36 ( 9 days ) 1 |
140 50 |
4x10-4 | Insert CCAL, HV on for low-energy TAGH |
Total | 28 days |
General Conditions
The following numbers were taken from the production running conditions.
Numbers need to be updated for our run.
Item | Polarized Beam |
---|---|
Beam Energy | 10.9 GeV |
Beam Current | 140 nA |
Active Collimator (Inner) optimal coordinates | x = 0 mm, y = −0.2 mm (Will be updated) |
BPM (IPM5C11B) optimal coordinates | x = −0.5 mm, y = +1.0 mm |
Tagger Quadrupole (MQPAD00) Current | −4.2 A |
Radiator | JD70-105, 47 μm |
Coherent Peak Position | 8.6 GeV |
Beam Profiler | retracted |
Collimator | 5.0 mm |
Pair Converter | Be 75 μm |
Pair Spect. Magnet Current (set point) | 850 A |
GlueX Solenoid | 1350 A |
TAC | retracted |
Setting up photon beam
Verify electron beam quality and establish photon beam
Trigger Types
The experiment will have physics and monitoring triggers in the data stream. Previous trigger configuration here
- Physics trigger
Trigger Type | Trigger Bit (starting from 1) | |
---|---|---|
Main Production trigger | FCAL + BCAL & SC | 1 |
BCAL | 3 | |
Luminosity | PS | 4 |