Difference between revisions of "The HPS Run Wiki"

Revision as of 10:18, 4 March 2016

Procedures

Commissioning Plans:
- Beamline
- Trigger
- ECal
- SVT
SVT TOSP (1,2,3)
Tunnel/Hall Access
Power Failure

Manuals

JLab Logbooks

HPS 2016 run, February 4 to March 14, Weekends Only
Shifts are manned from Friday 2pm to Monday 7am
Beam energy 2.3 GeV (1 pass)
Important: Document all your work in the logbook!

Bluejeans for Run Meetings on Thursdays and Fridays at 2pm

RC: Nathan Baltzell

(757) 575-7540
9 575 7540 from Counting Room

PDL: Harut Avakian

Run Plan for February 26 - 29, 2016:

Start close-up of the Hall at 3pm on Friday, March 4

See General Instructions on the right for details

When hall reaches "Beam Permit", turn on the chicane

Establish beam to the tagger dump

See "General Instructions" on the right for details
Log screenshots of the ECal and main HPS scaler screens for reference when beam is established at the tagger

Bring beam to FC:

Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be 50 nA. Before moving forward with 2H02A harp scans and beam profile tune, make sure orbit lock is engaged at positions on 2H00(X=0.00,Y=0.00) and on 2H02(X=-1.00,Y=-0.85).
Important Note: Before bringing beams to the FC, be sure that the SVT and ECal are off, the SVT fully retracted, the target out, and the 2.82 mm SVT collimator is in. All beam studies should be done in these conditions with beam currents of 50 nA.
The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.10 mm, and the tilt angle <15 degrees. The spot on the Chromax viewer should be close to x=-2mm, y=-5mm.
Set beam position
- Have MCC move beam to standard values (see "General instructions" on the right)
  - Achieve desired beam shape with 2H02 harp, and stability with BPMs and beam scaler counters
- Move the beam 250 um beam-right (positive-x direction) by decreasing the Frascati current by 5 A.
  - Perform one SVT wire scan to confirm

- ~~Scan of the 3.94 mm collimator and center. Record the new position and have it entered into the epics database.~~
Restore ECal and Trigger
- Turn on ECal
- Record FADC rates with and without the 4 um target at 200 nA. Agree with last weekend? See https://logbooks.jlab.org/entry/3379417
- Trigger/DAQ expert checks trigger rates, DAQ, and deadtime with 200 nA beam on 4 um target. Record:
  1. main scaler screen
  2. ecal scaler gui
  3. trigger rate gui (requires DAQ Prestarted with HPS/Run2016/v7_200nA.trg)
SVT Setting (call SVT expert in)
- If beams are stable, SVT expert moves SVT to 1.0 and then 0.5 mm
- record occupancy, latency, data size, and deadtimes
Record Data with 4um target
- Use v7_200nA.trg.
- Be sure to follow General Guidelines, especially instructions for Every Shift and Every Run below.
- Monitor and record BPM 2H02 history carefully to insure stable beams.
  - If beams are not stable, get MCC to fix it!
- Document any beam condition change and send scaler GUIs to HBLOG
- Fill out BTA hourly. Reading from EPICS should now be correct.
High/Low Beam current Runs (to be scheduled by RC)
- Take one run at 50 nA and one at 300 nA. Ten minutes each.
- For the 50 nA run use v7_0nA.trg
- For the 300 nA run use v7_200nA.trg

Miscellaneous Notes:

Do not run more than 60 minutes above 30 nA without the beam blocker in front of Faraday cup. Put beam blocker in for long running at high currents.

General Instructions:

Locking up the hall on Fridays

At 2pm check the status of the activities in the hall and notify RC if there are potential delays for the lockup at 3pm.
Work with the hall work coordinator (Doug Tilles or his designee) to make sure hall is ready for sweep at around 3pm:
- Vacuum is good, magnet power supplies are turned ON and in remote mode, LCW is on.
Make sure experts, beamline, ECal, SVT, and slow controls, checked their systems before the lockup.
When ready notify MCC to start sweep and lockup of the hall.
Make sure all necessary monitoring GUIs are up and running.
Make sure beam viewer screens are up.
When hall reaches "Beam Permit":
- turn on the chicane
- Turn SVT completely OFF (Bias, FEB, Flange)

Establishing Acceptable Beam Conditions:

Make sure SVT is retracted and both SVT and ECAL are OFF.
First send beam to the tagger dump:
- Check that beam type is set to "Photon" (HPS_EPICS->Beam->BTA).
- Ask MCC to turn ON the tagger magnet and then deliver <10 nA beam.
- Check the beam position on the tagger viewer, it should be approximately in the centre of the screen
- Follow instructions under "Procedures" on the documentation tab for "Beamline"[1]. To tune the beam on tagger dump and perform harp scans beam current should be <10 nA.
- Check profile using 2C21 and tagger harp scans, and compare the positions and widths with previous scans ([2],[3])
  - Positions on both harps should be within +/- 1mm,
  - Width on 2C21 should be <~0.1+/-0.05 mm
  - Width on tagger harp (2C24) <~0.35 +/- 0.1mm.
- If beam is stable enough to perform harp scans, turn ECAL HV ON to monitor and log ECal rates
- Halo counters UPS-L/R and TAG-L/T/T2 should be ~few Hz/nA [4]
Before sending beam to the Faraday cup
- Check that chicane GUI says "Chicane Ready"
- Check that SVT protection collimator is ON
- HPS target is OUT and ECAL HV is OFF
- SVT is OUT (position=0.000 mm in main hps scaler screen) and HV is off (all red/green indicators RED in SVT bias GUI)
- If any uncertainty, page the experts
- The first time sending beam to the Faraday cup after the hall is closed, page the SVT expert.
Send beam to the Faraday cup
- Follow the instructions under "Procedures" on the documentation tab for "Beamline"[5] to establish beam to the electron dump. Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be 50 nA.
- Ask MCC to establish 50 nA beam with HPS orbit locks on (We need HallBHPSOrb not HallBOrb configuration). For orbit lock positions on 2H00(X=0.00,Y=0.00) and on 2H02(X=-1.00,Y=-0.85). Use the 2.82 mm SVT collimator. .
- Tune beam profile at HPS using measured widths on 2H02A harp. The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.10 mm for commissioning, and Y-width ~0.05 for physics running, and the tilt angle <15 degrees.
- Check and log the beam spot on chromax viewer
- The halo counter rates before HPS must be low:
  1. UPS-L and UPS-R few Hz/nA,
  2. The tagger counters should count less than Hz/nA and downstream counters should count ~Hz/nA
  3. The halo counter rates on HPS, HPS-L/R/T/SC, depends on the collimator and HPS chicane settings, but should not be more than 100 Hz/nA [6]
- Positions on BPMs must be close to what they were before [7]
- Once all the above is achieved, turn ECAL HV ON to monitor and log ECal rates
- Insert the 4um W target without turning off the beam.
Before accepting beam, make sure all the previous conditions are met. Always read previous log entries, compare settings of BPMs and correctors with previous settings using scaler_hps GUI.

Recovering from beam trips when running SVT at 0.5 mm:

SVT HV will trip off automatically
Check the FSD GUI to see if high rates in the HPS halo counters generated the trip
- If it was NOT an HPS halo counter trip, MCC should restore the beam on their own. As soon beam is back and stable, restore SVT HV.
- If it was an HPS halo counter trip, MCC will not restore the beam until we request it. Inform MCC that we will get back to them when we are ready for beam.
  1. Retract the SVT to its 1.5 mm stations, both top and bottom.
  2. Tell MCC we are ready for beam.
  3. Once beam is restored, confirm that both 2H02 beam positions x and y are as desired and halo counter rates are as expected.
  4. Once beam is stable for ~1 minute, restore SVT HV and the SVT to its nominal position.
  5. Resume data taking.

Every Shift:

Follow run plan as outlined by RC
If any concern about beam stability, ask MCC if orbit locks are on (they should be).
Keep shift summary up to date in HBLOG. Record all that happens.
- Check on white board all scalers, strip charts and monitoring plots that need to be logged regularly
- Document any beam condition change and send scaler GUIs to HBLOG
- Fill out BTA hourly
- Fill and submit the shift checklist in the logbook
Perform 2H02A harp scan once per shift or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer)
With any issue contact On-Call Experts or RC

Every Run:

After "Go": Check SVT Occupancy
Update the Run Spreadsheet
Log screenshots of:
- main scaler_hps display
- ECAL FADC rate gui
- Trigger rate gui
- SVT and ECAL Monitoring pdfs
After each run execute this script (replace RunNb by the actual run number):
- hps2tape.sh RunNb

Run Coordinator
Feb 3 - Feb 10	Stepan Stepanyan
Feb 10 - Feb 17	Takashi Maruyama
Feb 17 - Feb 24	John Jaros
Feb 24 - Mar 2	Raphaël Dupré
Mar 2 - Mar 9	Nathan Baltzell
Mar 9 - Mar 16	Maurik Holtrop

Physics Division Liaison
Feb 3 - Mar 16	Harut Avagyan

Beamline
Feb 4 - Feb 10	F.X. Girod
Feb 10 - Feb 17	Stepan Stepanyan
Feb 17 - Feb 24	Rafo Paremuzyan
Feb 24 - Mar 2	Clive Field
Mar 2 - Mar 9	Takashi Maruyama
Mar 9 - Mar 16	John Jaros

SlowControls
Feb 4 - Feb 11	Stepan Stepanyan
Feb 12 - Feb 18	Sho Uemura
Feb 19 - Feb 25	Bryan McKinnon
Feb 26 - Mar 10	Hovanes Egiyan
Mar 11 - Mar 14	Nathan Baltzell

ECAL
Feb 2 - Feb 9	Holly Vance
Feb 9 - Feb 16	Nathan Baltzell
Feb 16 - Feb 23	Raphaël Dupré
Feb 23 - Mar 1	Andrea Celentano
Mar 1 - Mar 8	Gabriel Charles
Mar 8 - Mar 15	Gabriel Charles

SVT
Feb 4 - Feb 12	Matt Graham
Feb 12 - Feb 19	Sho Uemura
Feb 19 - Feb 26	Matt Solt
Feb 26 - Mar 4	Vitaliy Fadeyev
Mar 4 - Mar 14	Tim Nelson

DAQ
Feb 3 - Mar 16	Sergey Boyarinov

Spring 2015 Final @ 1 GeV:

.

Webcams:

Accelerator:

Slow Controls:

Online & Offline:

System/Person	Pager/Phone Number
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

@@ Line 113: / Line 113: @@
 # '''Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be 50 nA. Before moving forward with 2H02A harp scans and beam profile tune, make sure orbit lock is engaged at positions on 2H00(X=0.00,Y=0.00) and on 2H02(X=-1.00,Y=-0.85). '''
 # '''<font color=red> Important Note: Before bringing beams to the FC, be sure that the SVT and ECal are off, the SVT fully retracted, the target out,  and the 2.82 mm SVT collimator is in. All beam studies should be done in these conditions with beam currents of 50 nA.</font>'''
-# The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.10 mm, and the tilt angle <15 degrees. The spot on the Chromax viewer should be close to x=-2mm, y=-5mm. <b> Do not waste too much time on the initial beam tune, as long as rates on the halo counters are low - Downstream L/R/T/B and HPS-L/R <~few Hz/nA, and HP-SC < few x 10 Hz, the following program still can be done:</b>
+# The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.10 mm, and the tilt angle <15 degrees. The spot on the Chromax viewer should be close to x=-2mm, y=-5mm.
+<!--<b> Do not waste too much time on the initial beam tune, as long as rates on the halo counters are low - Downstream L/R/T/B and HPS-L/R <~few Hz/nA, and HP-SC < few x 10 Hz, the following program still can be done:</b> -->
 # Set beam position
 #* Have MCC move beam to standard values (see "General instructions" on the right)