Difference between revisions of "SRC/CT Run Plan"

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Line 20: Line 20:
 
|-
 
|-
 
| Run with C target<br />
 
| Run with C target<br />
| 20 days
+
| 20 days (12 days proposal)
 
| 140 nA
 
| 140 nA
 
|-
 
|-
Line 36: Line 36:
 
|-
 
|-
 
| Run with 4He
 
| Run with 4He
| 10 days
+
| 10 days (10 days proposal)
 
| 140 nA
 
| 140 nA
 
|-
 
|-
Line 48: Line 48:
 
|-
 
|-
 
| Run D
 
| Run D
| 8 days
+
| 8 days (5 days proposal)
 
| 140 nA
 
| 140 nA
 
|-
 
|-
Line 58: Line 58:
 
| 10 days
 
| 10 days
 
| 140 nA
 
| 140 nA
 +
|-
 +
| Total
 +
| 54 days
 +
|
 
|}
 
|}
  
Line 148: Line 152:
 
==Detailed Activities==
 
==Detailed Activities==
  
=== 1. Prior to beam activities ===
+
=== Prior to beam activities ===
  
Estimated time (3 -4  Shifts: 1 Day)  
+
Estimated time (3-4  Shifts: 1 Day)  
  
 
*  With Radcon support, Hall D techs uncable and remove start counter from cryostat
 
*  With Radcon support, Hall D techs uncable and remove start counter from cryostat
Line 166: Line 170:
 
*  Hall D techs Ramp up the magnet
 
*  Hall D techs Ramp up the magnet
  
=== 2. Calibration before production runs ===
+
=== Calibration before production runs ===
  
 
Estimated time (1 Shift)  
 
Estimated time (1 Shift)  
Line 175: Line 179:
 
* Equalize CCAL gains (calibrate CCAL)
 
* Equalize CCAL gains (calibrate CCAL)
 
* TAC run ??
 
* TAC run ??
 +
 +
=== DAQ checkout===
  
 
=== Luminosity Scan ===
 
=== Luminosity Scan ===
Line 181: Line 187:
 
* Ideal Rate 80 kHz (91% livetime)  
 
* Ideal Rate 80 kHz (91% livetime)  
  
 +
=== Production runs with Carbon ===
  
===Loading Liquid Targets===
+
Run at nominal conditions for 20 days.
  
{| border
+
=== Production runs with 4He ===
|-
+
!
+
! Contact
+
! Details
+
|-
+
| Disassemble beam pipe<br />Retract target<br />Remove ST<br />Remove Gluex Cell
+
|
+
|
+
|-
+
| Mount target cell <br /> Mount heat shield
+
|
+
|
+
|-
+
| Survey
+
|
+
|
+
|-
+
| Attach vacuum snout<br />Attach ST<br />Target in place<br />Assemble beam pipe<br />Pump vacuum in the target ladder<br />
+
|
+
|
+
|-
+
| Ramp Magnet up <br />
+
|
+
|
+
|}
+
  
===Loading Solid Targets===
+
# Loading the target
 +
#*  With Radcon support, Hall D techs uncable and remove start counter from cryostat
 +
#*  With Radcon support, Target Group secures target 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 LHe4 ladder in place of the carbon ladder
 +
#*  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
 +
# Detector and DAQ checkout
 +
# Production run with 4He for 10 days
  
{| class="wikitable"
+
=== Empty Cell Runs ===
|- style="font-weight:bold;"
+
!
+
! Contact
+
! Details
+
|-
+
| Disassemble beam pipe<br />Retract target<br />Remove ST<br />Remove Gluex Cell
+
|
+
|
+
|-
+
| Mount C foil ladder
+
|
+
|
+
|-
+
| Survey
+
|
+
|
+
|-
+
| Attach vacuum snout<br />Attach ST<br />Target in place<br />Assemble beam pipe<br />Pump vacuum in the target ladder<br />
+
|
+
|
+
|-
+
| Ramp Magnet up <br />
+
|
+
|
+
|}
+
  
=== DAQ checkout===
+
Estimated time (2 Shifts)
  
 +
#*  Target group pumps out the LHe from the target cell.
 +
#*  Target group bring up to room temperature.
 +
#*  Target group pump out of the cell.
 +
#  Runs with Empty Cell target (1 shift).
  
 +
=== Production runs with D ===
  
 +
#*  Target group cool down the cell filled with liquid D (Estimated time 1-2 shifts)
 +
#  Detector and DAQ checkout
 +
# Production run with D for 8 days
  
 +
=== Target swap to Cu ladder ===
 +
 +
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
  
 +
=== Production runs with Cu ===
  
=== Empty Cell Runs===
+
Run at nominal conditions for 10 days.

Revision as of 15:52, 29 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 (12 days proposal) 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 (10 days proposal) 140 nA
Empty Cell Run 1 shift 140 nA
Target change to D 3 shifts
Run D 8 days (5 days proposal) 140 nA
Target change to Cu 5 shifts
Run with Cu 10 days 140 nA
Total 54 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
  • Monitoring triggers
Trigger Type Trigger Bit
FCAL LED
BCAL LED
DIRC LED
Random

Detailed Activities

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

Calibration before production runs

Estimated time (1 Shift)

  • Establish typical tagged photon beam
  • Harp scans for the electron Beam (and PS)
  • Initial detector check out
  • Equalize CCAL gains (calibrate CCAL)
  • TAC run ??

DAQ checkout

Luminosity Scan

  • 1M(?) events runs with the following currents 30, 60, 90, 120, 150 nA
  • Ideal Rate 80 kHz (91% livetime)

Production runs with Carbon

Run at nominal conditions for 20 days.

Production runs with 4He

  1. Loading the target
    • With Radcon support, Hall D techs uncable and remove start counter from cryostat
    • With Radcon support, Target Group secures target 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 LHe4 ladder in place of the carbon ladder
    • 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. Detector and DAQ checkout
  3. Production run with 4He for 10 days

Empty Cell Runs

Estimated time (2 Shifts)

    • Target group pumps out the LHe from the target cell.
    • Target group bring up to room temperature.
    • Target group pump out of the cell.
  1. Runs with Empty Cell target (1 shift).

Production runs with D

    • Target group cool down the cell filled with liquid D (Estimated time 1-2 shifts)
  1. Detector and DAQ checkout
  2. Production run with D for 8 days

Target swap to Cu ladder

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

Production runs with Cu

Run at nominal conditions for 10 days.