Difference between revisions of "Engineering Run"
Jump to navigation
Jump to search
Line 97: | Line 97: | ||
*# ask MCC to degauss and turn the tagger dipole off; | *# ask MCC to degauss and turn the tagger dipole off; | ||
*# position 20 mm collimator on the beam and move \Chromox" screen of the downstream viewer in beam position (if it is not already) | *# position 20 mm collimator on the beam and move \Chromox" screen of the downstream viewer in beam position (if it is not already) | ||
− | *# ask for <= 1 nA, positions, quads settings and rates should be as in https://logbooks.jlab.org/entry/3502404; pay particular attention to halo counter rates: if very different from what shown in the link, call MCC and ask them to verify their settings; | + | *# ask for <= 1 nA, positions, quads settings and rates should be as in https://logbooks.jlab.org/entry/3502404; pay particular attention to halo counter rates: if very different from what shown in the link, call MCC and ask them to verify their settings; note that BOM gains were lowered today and rates should be lower (see https://logbooks.jlab.org/entry/3502559). |
− | *# make sure beam is stable, beam spot is clearly visible on the chromax viewer nd current does not exceed 1 nA | + | *# make sure beam is stable, beam spot is clearly visible on the chromax viewer nd current does not exceed 1 nA; |
*# repeat harp scans at 2c21, 2c24 (tagger harp) and 2h01: profile should be as in https://logbooks.jlab.org/entry/3502250, https://logbooks.jlab.org/entry/3502252 and https://logbooks.jlab.org/entry/3502313. Make sure you select the proper PMT for the analysis. The profile at 2c21a and 2c24 should be as in the scans performed with beam to the tagger. If necessary ask MCC to adjust the beam profile at 2H01 to match the previous scan. | *# repeat harp scans at 2c21, 2c24 (tagger harp) and 2h01: profile should be as in https://logbooks.jlab.org/entry/3502250, https://logbooks.jlab.org/entry/3502252 and https://logbooks.jlab.org/entry/3502313. Make sure you select the proper PMT for the analysis. The profile at 2c21a and 2c24 should be as in the scans performed with beam to the tagger. If necessary ask MCC to adjust the beam profile at 2H01 to match the previous scan. | ||
* once beam tuning is complete ask for 1.5 nA and ask MCC to unmask the FSD. | * once beam tuning is complete ask for 1.5 nA and ask MCC to unmask the FSD. | ||
− | + | * turn on the forward carriage detectors: EC, PCAL, FTOF; check rates and record them in the logbook; | |
− | ** | + | * if rates are consistent with previous, proceed to turning on LTCC, DC, HTCC; |
+ | * turn on CTOF and CND; if rates are acceptable, contact M. Defurne and Y. Gotra to turn on MVT and SVT; while Yuri will monitor the SVT, increase the beam current to 5-10 nA; when the current is increased | ||
+ | * once all detectors are on, contact C. Smith (ECAL expert) to start the DAQ and online monitoring (CED and CLAS12MON): purpose of tonight running is to take data with empty target and different trigger configurations | ||
+ | * once all empty target runs are completed | ||
+ | |||
** prepare to fill the target (consult with Engineering on call). | ** prepare to fill the target (consult with Engineering on call). | ||
** whenever beam is off but Hall C has beam, checks rates and beam current monitor readings looking for possible bleedthrough. | ** whenever beam is off but Hall C has beam, checks rates and beam current monitor readings looking for possible bleedthrough. |
Revision as of 18:29, 11 December 2017
[edit]
Shift ScheduleShift ChecklistHot CheckoutBeam Time Accounting |
Manuals |
Procedures |
JLab Logbooks
|
|
|
- Note, all non-JLab numbers must be dialed with an area code. When calling from a counting-house landline, dial "9" first.
- To call JLab phones from outside the lab, all 4-digit numbers must be preceded by 757-269
- Click Here to edit Phone Numbers. Note, you then also have to edit the current page to force a refresh.
Click Here to edit Phone Numbers. Note, you then also have to edit this page to force a refresh.
CLAS12 Engineering Run, Fall 2017
Beam energy 10.6 GeV (5 pass)
Important: Document all your work in the logbook!
RC: Raffaella DeVita
- (757) 575-7540
- 9 575 7540 from Counting Room
- devita@jlab.org
PDL: Eugene Pasyuk
- (757) 876-1789
- 9 876-1789 from Counting Room
- pasyuk@jlab.org
Run Plan: beamline commissioning
Important Notes:
|
General Instructions:Locking up the hall
|
Every Shift:
|
Every Run:
|
---|
Webcams |
Manuals |
Epics on the web
|