Difference between revisions of "The HPS Run Wiki"

Revision as of 17:58, 19 February 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 3pm to 7am on Monday. Beam energy 2.3 GeV (1 pass). Important: Document all your work in the logbook!

RC: John Jaros (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 19 - 22, 2016:

Start close-up of the Hall at 3pm on Friday, February 19 (see "General instruction" on the right)

After hall is in "Beam Permit" turn on the chicane (see "Setting up Chicane for E=2.3 GeV" under "General instructions" on the right)

Establish beam to the tagger dump (see "General instruction" on the right)

Bring beam to FC:

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 2H00(X=~0.,Y=~0.). on 2H02(X=-0.7,Y=-1.2). Before bringing beams to the FC, be sure that the SVT and ECal are off, the SVT fully retracted, the target out, and the 2.25 mm SVT collimator is in.. 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 <~ 0.10 mm, and the tilt angle <15 degrees. The spot on the Chromax viewer should be close to x=-2mm, y=-5mm. 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:
SVT Expert resets beam position with SVT wire scan.
- run svt wire scan. See https://logbooks.jlab.org/entry/3379399
- have MCC move beam to x=0.0, y=0.0 mm using upstream correctors and Frascati current.If need to move to beam's right,subtract 10A from Frascati (1 mm), rest with correctors. If need to move to beam's left, split the difference between Frascati (add 10A/mm) and corrector. See that Chromax spot hasn't moved too far and confirm with SVT wires.
- repeat and record 2H02 harp scan and BPM values. These are the new standards.
- repeat scan of the 2.25 mm collimator and re-center it. Record the new position have it entered into the epics data base.See https://logbooks.jlab.org/entry/3379405
Restore ECal and Trigger
- turn on ECal
- ECal Expert measures pedestals
- Record FADC rates with and without the 4 um target at 100 nA, then 200 nA. Agree with last weekend? See https://logbooks.jlab.org/entry/3379417
- Trigger rate studies (see instructions under "procedures" for trigger on wiki)
- 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/v1.trg)
SVT Expert program at 1.5 mm (shifters run beam stability checks in parallel--see below)
- Ensure that BPM 2H02 is stable and FSD system is set properly for 200 nA and on.
- Turn on SVT
- Move to 1.5 mm
- Time in SVT and record occupancy and latency
- Check tracking and track quality with online monitoring
Shifters evaluate beam stability (in parallel with SVT Expert program above)
- Plot and record halo rate histories and BPM 2H02 histories
- Does beam move at time of trips? How stable is beam in x and y?
- Which trips are initiated by FSD? See FSD GUI.
SVT Commissioning
- If beams are stable, SVT expert moves SVT to 1.0 and then 0.5 mm
- record occupancy, latency, data size, and deadtimes
- Once at 0.5 mm, record no target run,occupancy and tracking performance,and APV pulse shape timing study
Survey of Data Taking with Trigger/DAQ expert for run at 200 nA, 4 um, 0.5 mm.
- Review data rates, trigger rates, data volume, deadtime
- Select trigger for remaining run.
Record Data at 200 nA, 4um, 0.5 mm
- Include 1 hour of FEE trigger
- Bulk of data with Pairs1 trigger
- If get several hours worth of data, and it's not too late (> 8PM), call Mike Tiefenbach (if Sunday) or Arne Freyberger (if, miraculously, it's Saturday) to do improve vertical beam size.
- If it's too late, take data.

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 on remote, LCW is on.
Make sure experts, beamline, ECal, SVT, and slow controls, checked their systems befor the lockup.
When ready notify MCC to start seep and lockup of the hall.
Make sure all necessary monitoring GUIs are up and running.
Make sure beam viewer screens are up.

Acceptable Beam Conditions:

To establish good beam conditions:
- Make sure SVT is retracted and completely OFF
- First send beam to the tagger dump (ask MCC to turn ON the tagger magnet).
- Check that beam type is "Photon" on the BTA GUI (can be opened from "Beam" GUI).
- 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 with +/- 1mm, widths on 2C21 should be <~0.1+/-0.05 mm, and on the tagger harp (2C24) <~0.35 +/- 0.1mm.
- 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 SVT protection collimator is on beam
- HPS target is OUT
- SVT is OUT (position 0 mm) and voltages are OFF
- ECal HV is OFF
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 >25 nA. All studies should be done with beam currents between 25 nA and 30 nA.
- Ask MCC to establish 25 nA beam with HPS orbit locks on (We need HallBHPSOrb not HallBOrb configuration). For orbit lock positions on 2H00(X=~0.,Y=~0.). on 2H02(X=-0.7, Y=-1.2). Use the 2.25 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 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]
- 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 will restore the beam as usual (following their own instructions). As soon beam is back and stable, restore SVT HV.
- If it was an HPS halo counter trip, MCC will not restore the beam. 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 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 "Prestart" but before "Go", Check ECal Latency
After "Go": Check SVT Occupancy
Update the run spreadsheet on Google Docs.
See the whiteboard for everything else that should be done on a per-run basis.

Setting up Chicane for E=2.3 GeV:

Note: This requires Beam Permit and NO beam to HPS / Faraday Cup.

Turn on chicane power supplies following instructions on the documentation page on [8]

SVT Instructions:

Turn SVT completely OFF (Bias, FEB, Flange) when entering Beam Permit.
Before sending beam to Faraday cup, verify (and page SVT expert if otherwise):
- SVT should be open: "Position" at 0.000 mm in the main scaler_hps GUI
- SVT HV is off: all red/green indicators RED in SVT bias GUI
The first time sending beam to the Faraday cup after the hall is closed, page the SVT expert.

ECAL Instructions:

HV must be OFF during FIRST delivery of beam to the Faraday Cup after tuning to the Tagger Dump.
- Only after stable beam established to Faraday Cup can HV can be turned ON.
HV should be OFF when running beam studies with Struck scalers with 1 mm wire or tuning collimator position.

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 110: / Line 110: @@
 # 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>
 # SVT Expert resets beam position with SVT wire scan.
-#* run svt wire scan
+#* run svt wire scan. See https://logbooks.jlab.org/entry/3379399
-#* have MCC move beam to x=0.0, y=0.0 mm using upstream correctors and Frascati current. Decide on change needed, ask for appropriate change on BPM 2H02. Iterate if needed.
+#* have MCC move beam to x=0.0, y=0.0 mm using upstream correctors and Frascati current.If need to move to beam's right,subtract 10A from Frascati (1 mm), rest with correctors. If need to move to beam's left, split the difference between Frascati (add 10A/mm) and corrector. See that Chromax spot hasn't moved too far and confirm with SVT wires.
-#* confirm beam envelope tilt on OTR
 #* repeat and record 2H02 harp scan and BPM values. These are the new standards.
-#* repeat scan of the 2.25 mm collimator and re-center it. Record the new position have it entered into the epics data base.
+#* repeat scan of the 2.25 mm collimator and re-center it. Record the new position have it entered into the epics data base.See https://logbooks.jlab.org/entry/3379405
 # Restore ECal and Trigger
 #* turn on ECal
 #* ECal Expert measures pedestals
-#* Record FADC rates with and without the 4 um target at 100 nA, then 200 nA. Agree with last weekend?
+#* Record FADC rates with and without the 4 um target at 100 nA, then 200 nA. Agree with last weekend? See https://logbooks.jlab.org/entry/3379417
 #* Trigger rate studies (see instructions under "procedures" for trigger on wiki)
 #* Trigger/DAQ expert checks trigger rates, DAQ, and deadtime with 200 nA beam on 4 um target. Record:
@@ Line 127: / Line 126: @@
   -->
 # SVT Expert program at 1.5 mm (shifters run beam stability checks in parallel--see below)
-#* Ensure that BPM 2H02 is stable and FSD system is on
+#* Ensure that BPM 2H02 is stable and FSD system is set properly for 200 nA and on.
 #* Turn on SVT
 #* Move to 1.5 mm
@@ Line 135: / Line 134: @@
 #* Plot and record halo rate histories and BPM 2H02 histories
 #* Does beam move at time of trips?  How stable is beam in x and y?
-#* Which trips are initiated by FSD?
+#* Which trips are initiated by FSD? See FSD GUI.
 # SVT Commissioning
 #* If beams are stable, SVT expert moves SVT to 1.0 and then 0.5 mm
@@ Line 146: / Line 145: @@
 #* Include 1 hour of FEE trigger
 #* Bulk of data with Pairs1 trigger
-#* If get several hours worth of data, and it's not too late (= 8PM), call Mike Tiefenbach (if Sunday) or Arne Freyberger (if, miraculouly, it's Saturday) to do improve vertical beam size.
+#* If get several hours worth of data, and it's not too late (> 8PM), call Mike Tiefenbach (if Sunday) or Arne Freyberger (if, miraculously, it's Saturday) to do improve vertical beam size.
 #* If it's too late, take data.