SRC/CT Run Plan

From GlueXWiki
Revision as of 12:06, 1 November 2021 by Somov (Talk | contribs)

Jump to: navigation, search

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 nA same
Collect data in row mode 0.1 10 - 150
Total 2.5 days
Production with 4He target
48 ( 12 days )
1
140 nA
50 nA

Insert CCAL
Empty (He) target run 2
Target change to D 2.0
Production with D target 8 (2 days)
1
140 nA
50 nA

Insert CCAL
TAC run (use CCAL as TAC) 2 shifts < 5 nA 2x10-5 Empty liquid target
Target change to C
Ramp the solenoid magnet down
Install and align target
Compton run no field
Ramp the magnet up

1.25
1.5
0.5
1.25

-
-
0.5
-

-
-
10-4 Amo
-
Production with C target 36 ( 9 days ) 140 nA 4x10-4
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 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. Previous trigger configuration here

  • Physics trigger
Trigger Type Trigger Bit (starting from 1)
Main Production trigger 0.7 FCAL + BCAL > 180 MeV & SC 1
BCAL > 1.1 GeV 3
Luminosity PS 4