Difference between revisions of "The HPS Run Wiki"

Revision as of 09:25, 19 August 2019

COO, ESAD, RSAD Things to read before shift.

Procedures

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

Manuals

JLab Logbooks

HPS (E12-11-006) 2019 run, June X to August Y'
Beam energy 4.5 GeV
Important: Document all your work in the logbook!
Bluejeans for Run Meetings on DAY and DAY at 2pm

RC: Stepan Stepanyan

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

PDL: Valery Kubarovsky

(757) 876-1789
9 876-1789 from Counting Room

Important SAFETY instructions

No access to the alcove if the chicane magnet beacon is ON.

Chicane magnets must be OFF if the hall is in Controlled access and access to the alcove is needed or when the hall is in Restricted access. If Chicane magnets are OFF, they can be energized only when the hall is in Power or Beam Permit, [1].

TURN OFF the chicane magnet if beam is not available due to a thunderstorm. Loss off power would seriously damage detectors.

Important general instructions

Fill out BTA hourly. Click "Load from EPICS" to fill the left side, then make sure numbers are correct. If needed edit the entry.

NO ABUs or BANU if beam tune is in progress, make it all BNA with ER 100%. At the end of the shift save BTA to the logbook!

Please close any GUI that is not being used, e.g. close harp scanner after harp scan is done, close chicane, after chicane is ON, etc.

Run Plan August 19-20, 2019

Schedule and plans:
1. Take production data with PROD66 (PROD67) / hps_v10.trg 20um target at 100 nA
2. Study new trigger setups to get acceptable LT (>90%) at 120 nA
3. Do beam profile check ones a day, at 3 pm, using 2H02 and SVT wire harps
Hot items:
1. Monitor carefully the SVT bias current (see below for details)
2. When re-establishing beam to Hall B after a >1h long downtime follow "General Guidelines" on the right and the Beamline Procedures and Manual on the shift documentation page. Do not hesitate to call the beamline expert.
3. Remember to do HARP scans of 2H02 every shift!

Every Shift:

Follow run plan as outlined by RC
With any issue contact On-Call Experts or RC
Perform 2H02A harp scan once per day or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer). See below for detailed procedure.
If any concern about beam stability, ask MCC if orbit locks are on (they should be ON).
Keep shift summary up to date in HBLOG. Record all that happens.
- Document any beam condition change and send scaler GUIs to HBLOG
- Fill out BTA hourly. Click "Load from EPICS" to automatically fill the left side then make sure numbers are correct. If needed edit the entry. Note: in the "Sift information" tab choose experiment E12-11-006. . At the end of the shift send BTA to teh logbook.
- Fill and submit the shift checklist in the logbook

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 HODOSCOPE and ECAL Monitoring pdfs
Please watch Hybrid sync gui for correct status (currently three red lights) and the L0-3 and L4-6 occupancy plots for any empty plots beyond the expected three.

SVT Bias Currents:

Shifters must pay attention to the L0 bias currents. This is on both the SVT motor GUI and the main bias GUI. The bias currents will slowly creep up over the course of a run. When the bias current is between 15-20 uA for either L0 sensor, do the following:

Stop the run.
Take the beam away, turn off SVT bias voltages, and wait 10 min.
Turn the bias voltages back on.
Check that the L0 bias currents have gone back down to ~4 uA
Bring back the beam and start a new run.

Do not let the bias current exceed 20 uA. It takes about 4-5 hours for the bias currents to creep up to those values. Call SVT expert if unsure.

Harp Scan Procedure:

During harp scans, SVT must be retracted (motors/SVT Positioners). HVs on SVT, ECal and Hodoscope should be OFF.
Halo counter FSDs (Downstream, HPS Up and HPS Down) are masked, Beam current 100 nA, Orbit locks running.
Perform the HARP scan, log the results.
If the beam looks different, you should call beam-line on-call that will advise on the next steps.
If the beam looks different, perform SVT wire scan, the target needs to be retracted as well for this one.
- IMPORTANT, use the bottom SVT wire scan only. Top SVT wire is broken.

Important 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.
For SVT Operations:
- From the time beam first comes into the hall until it is being delivered to the Faraday cup with orbit locks on for a known good trajectory, the SVT should be completely off. This is especially important during tuning to the tagger dump, when mis-steering of the beam can result in very high hard neutron backgrounds.
- Once stable beam is being delivered to the Faraday cup with orbit locks on for a known good trajectory, and the SVT collimator is in position, the FEBs and hybrids can be powered and operated, but the HV bias for the sensors must remain off.
- In order to turn on the HV, the FSD system must be functioning so a beam excursion that hits the collimator will quickly trip off the beam.

General Instructions

Establishing Physics Quality Beam for HPS:

Make sure SVT is retracted and detectors, SVT, Hodoscope and ECAL are OFF.
If the beam was off for 4 hours or more or in case of troublesome beam tuning, send a beam to the tagger dump:
- Check that beam type is set to "Photon" (HPS_EPICS->Beam->BTA).
- Position "Blank" on the beam for the Hall-B collimator
- Ask MCC to turn ON the tagger magnet and then deliver <10 nA beam to the tagger dump.
- Check the beam position on the tagger viewer, it should be approximately in the center of the screen
- Follow instructions under "Procedures" on the documentation tab for "Beamline"[2]. To tune the beam on tagger dump and perform harp scans beam current should be <10 nA.
- Check profile using 2C21 and tagger (2C24) harp scans and compare the positions and widths with previous scans ([3],[4])
  - Positions on both harps should be within 1mm
  - Width on 2C21 should be <~0.2+/-0.05 mm
  - Width on tagger harp (2C24) <~0.5 +/- 0.1mm
- Background levels on harp scan are comparable to those of previous scans.
Before sending a beam to the Faraday cup
- If HPS chicane must be ON, make sure that chicane GUI says "Chicane Ready"
- Set Hall-B Collimator to 20 mm.
- Check that SVT protection collimator is ON THE BEAM (2.82 mm). If the beam was off for more than 4HPS hours or the configuration has changed, start with 3.94 mm
- HPS target is OUT and Hodoscope and ECAL HVs are OFF
- SVT is OUT (position=0.000 mm on the main HPS scaler GUI) and bias HV is off (all red/green indicators RED in SVT bias GUI)
- If any uncertainty, page the experts
- Pay attention into following corrector values: 2C22H, 2C23V, 2H00H, 2H00V, Compare them to ones that are in [5]. Make sure their values don't differ more than 100%. If there is such difference, tell MCC about this.
Send beam to the Faraday cup
- If the beam optics is correct, then you should immediately see the beam spot on the Downstream Viewer and on the 2H00 and 2H02 BPMS.
- If you don't see it immediately, and rates on halo counters are more than 100 Khz, then ask MCC, to change to pulsed (tune mode) beam, and ask to restore corrector values. At this point don't accept any CW beam, until beam spot is visible on Downstream Viewer.
- If MCC operator is not able to tune the beam more than 15 minutes, then notify RC!
- Follow the instructions under "Procedures" on the documentation tab for "Beamline"[6] 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 >30 nA.

- Ask MCC to establish 30 nA beam with HPS orbit locks on (We need HallBHPSOrb not HallBOrb configuration). For orbit lock positions on 2H00(X=1.0,Y=1.5) and on 2H02(X=-1.7,Y=0.3). Use the 2.82 mm SVT collimator. (positions changed 6/25/19 by mg).
- Tune beam profile at HPS using measured widths on 2H01A and 2H02A harps. The required beam profile at 2H02A harp is: X-width <~0.1 mm, Y-width <~ 0.05 mm. Beam profile using 2H01A and 2H02A harps with previous scans ([7],[8]) to compare.
- Check and log the beam spot on chromax viewer
- The halo counter rates before HPS must be very low:
  1. Upstream Left and Right, and the tagger counters few 10's of Hz,
  2. 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 50 Hz/nA [9]
- Positions on BPMs must be close to what they were before [10]
- When everything is stable, perform SVT wire scan and compare with the nominal [11]
- Once all the above is achieved, turn ECAL and Hodoscope HV ON to monitor and log ECal rates
- Insert the 8um 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.

RC daily meetings at 2 pm in the counting-house 2nd-floor conference room.

BlueJeans Info:

URL: https://bluejeans.com/794825703

Meeting ID: 794825703

Status of the run

Run Coordinator
June 12 - June 19	Stepan Stepanyan
June 19 - June 26	Matt Graham
June 26 - July 3	Tim Nelson
July 3 - July 10	Takashi Maruyama
July 10 - July 17	Stepan Stepanyan
July 17 - July 24	Rafayel Paremuzyan
July 24 - August 7	Maurik Holtrop
August 7 - August 19	Raphael Dupre
August 19 - August 21	Stepan Stepanyan

Physics Division Liaison
HPS-2019	Valery Kubarovsky

Beamline
June 12 - June 19	Rafo Paremuzyan
June 19 - July 29	Stepan Stepanyan
July 29 - August 18	Rafo Paremuzyan

SlowControls
June 12 - Augus 19	Nathan Baltzell

ECAL/HODOSCOPE
June 12 - July 1	Nathan Baltzell
July 1 - July 8	Raffaella DeVita
July 8 - July 15	Rafayel Paremuzyan
July 15 - July 22	Andrea Celentano
July 22 - July 29	Rafayel Paremuzyan
July 29 - August 5	Raphel Dupre
August 5 - August 19	Gabriel Charles

DAQ
24/7/365	Sergey Boyarinov

SVT
June 01-05	Tim Nelson
June 01-07	Cameron Bravo
June 07-11	Omar Moreno
June 12	Omar Moreno and Matt Solt
June 12-19	Vitaliy Fadeyev
June 13-18	Matt Solt
June 19-26	Omar Moreno
June 26-July 03	Cameron Bravo
July 03-10	Tim Nelson
July 10-17	Omar Moreno
July 17-24	Cameron Bravo
July 24-31	Tim Nelson
July 31-August 07	Matt Graham
August 07-14	Matt Solt
August 14-21	Matt Solt

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) 310-7198 (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	5244(Shift1), 5245(Shift2)
Hall-B Counting Room	5247(Expert), 5502(Target)
Hall-B Counting Room	5246(RC1), 5126(RC2)
Hall-B Gas Shed	7115

@@ Line 109: / Line 109: @@
 == Important general instructions ==
 === [https://bta.acc.jlab.org Fill out BTA] hourly. Click "Load from EPICS" to fill the left side, then make sure numbers are correct. If needed edit the entry. ===
-NO ABUs or BANU if beam tune is in progress, make it all BNA with ER 100%.
+NO ABUs or BANU if beam tune is in progress, make it all BNA with ER 100%. At the end of the shift save BTA to the logbook!
 === Please close any GUI that is not being used, e.g. close harp scanner after harp scan is done, close chicane, after chicane is ON, etc.  ===
@@ Line 117: / Line 117: @@
 | valign=top width=50% |
-== Run Plan August 18-19, 2019 ==
+== Run Plan August 19-20, 2019 ==
 * <b>Schedule and plans:</b>
-*# Take production data with PROD66 / hps_v10.trg 20um target at 100 nA
+*# Take production data with PROD66 (PROD67) / hps_v10.trg 20um target at 100 nA
+*# Study new trigger setups to get acceptable LT (>90%) at 120 nA
+*# Do beam profile check ones a day, at 3 pm, using 2H02 and SVT wire harps
 * <b>Hot items:</b>
 *# Monitor carefully the SVT bias current (see below for details)
@@ Line 129: / Line 131: @@
 # Follow run plan as outlined by RC
 # '''With any issue contact On-Call Experts or RC'''
-# Perform 2H02A harp scan once per shift or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer). See below for detailed procedure.
+# Perform 2H02A harp scan once per day or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer). See below for detailed procedure.
-# If any concern about beam stability, ask MCC if orbit locks are on (they should be).
+# If any concern about beam stability, ask MCC if orbit locks are on (they should be ON).
 # 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
-#* [https://bta.acc.jlab.org Fill out BTA] hourly.  Click "Load from EPICS" to automatically fill the left side then make sure numbers are correct. If needed edit the entry. Note: in the "Sift information" tab choose experiment <font color=blue> E12-11-006. </font>
+#* [https://bta.acc.jlab.org Fill out BTA] hourly.  Click "Load from EPICS" to automatically fill the left side then make sure numbers are correct. If needed edit the entry. Note: in the "Sift information" tab choose experiment <font color=blue> E12-11-006. </font>. At the end of the shift send BTA to teh logbook.
 #* Fill and submit the [https://logbooks.jlab.org/checklists/530 shift checklist in the logbook]
@@ Line 164: / Line 165: @@
 # Perform the HARP scan, log the results.
 # If the beam looks different, you should call beam-line on-call that will advise on the next steps.
-# If the beam looks different, perform a SVT wire scan, the target needs to be retracted as well for this one.
+# If the beam looks different, perform SVT wire scan, the target needs to be retracted as well for this one.
 #* '''IMPORTANT, use the bottom SVT wire scan only.''' Top SVT wire is broken.
@@ Line 215: / Line 216: @@
 #* Follow the instructions under "Procedures" on the documentation tab for "Beamline"[https://wiki.jlab.org/hps-run/images/e/e6/HPS_beamline_comm.pdf] to establish beam to the electron dump.
 <b> Note: in order to have reliable readings on two important for HPS BPMs, 2H00 and 2H02, beam current should be >30 nA.</b>
-#* Ask MCC to establish 30 nA beam with <font color=red>HPS</font> orbit locks on (We need '''HallBHPSOrb''' not '''HallBOrb''' configuration). <b>For orbit lock positions on <font color=red>2H00(X=1.0,Y=1.5) and on 2H02(X=-1.5,Y=0.35). Use the 2.25 mm SVT collimator. (positions changed 6/25/19 by mg)</font></b>.
+#* Ask MCC to establish 30 nA beam with <font color=red>HPS</font> orbit locks on (We need '''HallBHPSOrb''' not '''HallBOrb''' configuration). <b>For orbit lock positions on <font color=red>2H00(X=1.0,Y=1.5) and on 2H02(X=-1.7,Y=0.3). Use the 2.82 mm SVT collimator. (positions changed 6/25/19 by mg)</font></b>.
 #* Tune beam profile at HPS using measured widths on 2H01A and 2H02A harps. The required beam profile at 2H02A harp is: X-width <~0.1 mm, Y-width <~ 0.05 mm. Beam profile using 2H01A and 2H02A harps with previous scans ([https://logbooks.jlab.org/entry/3696650],[https://logbooks.jlab.org/entry/3696777]) to compare.
 #* Check and log the beam spot on chromax viewer