Difference between revisions of "The HPS Run Wiki"
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<!-- == Beam is off and seep starts at 6:45 am on Monday, February 15. == --> | <!-- == Beam is off and seep starts at 6:45 am on Monday, February 15. == --> | ||
− | == Start close-up of the Hall at 3pm (see "General instruction" on the right) == | + | == Start close-up of the Hall at 3pm on Friday, February 12 (see "General instruction" on the right) == |
== Establish beam to the tagger dump (see "General instruction" on the right) == | == Establish beam to the tagger dump (see "General instruction" on the right) == | ||
== Bring beam to FC (consult with RC with any problem): == | == Bring beam to FC (consult with RC with any problem): == | ||
− | # | + | # <b> Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >25 nA. Before moving forward with 2H02A harp scans and beam profile tune, make sure orbit lock is engaged. For orbit lock positions on <font color=red> 2H00(X=~0.,Y=~0.). on 2H02(X=0.4,Y=-0.7). The new positions for collimator at this beam position are: 3.94 mm at 6.198, 2.82 mm at 5.03. Due to higher rates on halo counters we will run with 3.94 mm collimator. </font></b>. All studies should be done with beam currents between 25 nA and 30 nA. |
# The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.05 mm, and the tilt angle <15 degrees. <b> Do not west too much time on beam tune, as long as halo rates are low: Downstream L/R/T/B and HPS-L/R <~few Hz/nA, and HP-SC < few x 10 Hz, the following still can be done:</b> | # The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.05 mm, and the tilt angle <15 degrees. <b> Do not west too much time on beam tune, as long as halo rates are low: Downstream L/R/T/B and HPS-L/R <~few Hz/nA, and HP-SC < few x 10 Hz, the following still can be done:</b> | ||
#* Check rates on ECal - Turn ON Ecal and observe rates in modules close to the beam in Top and Bottom. If rates are too asymmetric (difference is larger than 30%) try to equalize or bring them close by moving the beam vertically from high rate module towards the low rate. Note, movement must be done according to 2H02 Y-position readings. SVT collimator must be positoned accordingly - remember BPM readings are in mm, collimator steps are in inches. | #* Check rates on ECal - Turn ON Ecal and observe rates in modules close to the beam in Top and Bottom. If rates are too asymmetric (difference is larger than 30%) try to equalize or bring them close by moving the beam vertically from high rate module towards the low rate. Note, movement must be done according to 2H02 Y-position readings. SVT collimator must be positoned accordingly - remember BPM readings are in mm, collimator steps are in inches. | ||
− | #* Mark the beam position on the chromox screen ( | + | #* Mark the beam position on the chromox screen (take a screen shot of the viewer, make a log entry) and turn on HPS chicane magnets. Due to stray fields vertical position may not come back at the same spot, <b> do not try to steer vertically</b>. If horizontal position is off, it indicates that relation between field (current) settings of Frascati and analyzing magnet are not correct. <b> At this point no need for an adjustment, just record the shift (take a screen shot of the viewer, amke a log entry) and settings, and move forward</b>. |
#* Study rates on ECal channels as a function of beam current without and with production target (4 um W). Do not exceed 1.3 MHz rate in an individual ECal channel. | #* Study rates on ECal channels as a function of beam current without and with production target (4 um W). Do not exceed 1.3 MHz rate in an individual ECal channel. | ||
− | #* Check the FSD system (see procedures on the Documentation page). Call Rafayel Paremuzian. | + | <!-- #* Check the FSD system (see procedures on the Documentation page). Call Rafayel Paremuzian. |
− | #* Check fast beam motion using struck scaler system. Call Rafayel Paremuzyan. | + | #* Check fast beam motion using struck scaler system. Call Rafayel Paremuzyan. --> |
#* Perform initial trigger rate studies | #* Perform initial trigger rate studies | ||
# If beam stability and profile are acceptable: | # If beam stability and profile are acceptable: |
Revision as of 14:01, 11 February 2016
[edit]
HPS 2016 run, February 4 to March 14, weekends only.
Shifts are manned from Friday 3pm to 7am on Monday.
Beam energy 2.3 GeV (1 pass).
Important: Document all your work in the logbook!
Spring 2015 Final @ 1 GeV:
Phone NumbersShift ScheduleShift-Taker's ChecklistHot CheckoutBeam Time AccountingRun Spreadsheet 2016, 2015 |
Procedures
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Manuals |
JLab Logbooks
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RC: Stepan Stepanyan (Bluejeans info for Run Meetings on Thursdays and Fridays at 3pm)
- (757) 575-7540
- 9 575 7540 from Counting Room
PDL: Harut Avagyan
Run Plan for February 12 - 15, 2016:Start close-up of the Hall at 3pm on Friday, February 12 (see "General instruction" on the right)Establish beam to the tagger dump (see "General instruction" on the right)Bring beam to FC (consult with RC with any problem):
Miscellaneous Notes:
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General Instructions:Locking up the hall on Fridays
Acceptable Beam Conditions:
Recovering from beam trips when running SVT at 0.5 mm:
Every Shift:
Every Run:
Setting up Chicane for E=2.3 GeV:Note: This requires Beam Permit and NO beam to HPS / Faraday Cup.
SVT Instructions:
ECAL Instructions:
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.
Webcams:
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Accelerator: |
Slow Controls:
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Online & Offline: |
System/Person | Pager/Phone Number |
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Run Coordinator | (757) 575-7540 (cell) |
Physics Div. Liaison | (757) 876-1789 (cell) |
MCC-OPS | 7048 |
Crew Chief | 7045 |
Crew Chief | 9-879-3367 (cell) |
Program Deputy | 9-876-7997 (cell) |
Gate House Guard | 5822 |
DAQ/Online | (757) 869-2188 (cell) |
SVT | (757) 541-7539 (cell) |
ECAL | (757) 810-1489 (cell) |
Slow Controls | (757) 748-6922 (cell) |
Beamline | (757) 303-3996 (cell) |
Engineering | (757) 748-5048 |
Hall-B Floor | 5165 |
Hall-B Space Frame | 5170, 5171 |
Hall-B Forward Carriage | 5371 |
Hall-B Counting Room | 5126, 5244, 5246, 5247 |
Hall-B Gas Shed | 7115 |