The HPS Run Wiki

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Shift Documentation
Short Term Schedule
Long Term Schedule
Monitoring

Checklists

Procedures

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

Manuals

JLab Logbooks

RC: John Jaros

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

PDL: Harut Avagyan

Every Shift:

Follow run plan as outlined by RC

Ask MCC if orbit locks are on, they should be.

Keep shift summery up-to-date in HBLOG

Document any beam condition change and send scaler GUIs to HBLOG

Send "scaler_hps" GUI to logbook at least twice per shift or any time run conditions change

Peform 2H02A harp scan ones per shift or when beam conditions changed based on beam monitors (BPMs, halo rates, beam-viewer)

Fill out shift checklist in the logbook, HBLOG, using template at least ones per shift or when run conditions change

Continuously check quality of data

With any issue contact On-Call Experts or RC.

SVT Instructions

Before sending beam to Faraday cup, verify (and page expert if otherwise):

SVT should be open: "Position" at 0.000 mm in scaler 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.

Every Run:

a
b
c
d

MCC Daily Meetings

Run Plan:March 18-19 (swing/owl/day)

Overview: Close up Hall B during swing, sweep, and go to beam permit. Beams are expected during owl. Program then will be to (1) restore beams to tagger; (2)starting Mar 19 day, make upstream beams available to machine for BPM calibration;(3)take beams to Hall B dump; (4)make downstream beams available to machine for BPM calibration.

Always Setup Beam to the Hall-B Tagger Dump after long down

After MCC finishes beam tune
- make sure beam conditions did not changed, beam position and halo counter rates are as before (see logbook from previous days)
- work with MCC to move bean position and direction to see if lower counts on upstream halo counters can be achieved (UPS-L and UPS-R)

Upstream halo counters must count <10Hz, downstream counters ~Hz

Perform harp scans to verify that beam profile did not changed, check with previous scan results: 2C21 x/y widths <50 micron, on the tagger/2C24 harp x/y widths ~300 micron. Use UPS-L for analysis, send harp scan results to the logbook
After beam tune is done send HPS scaler GUI to the logbook with proper comment

Give Beams to Machine in day shift for BPM calibration of upstream beamline.

Setup Beam to the Hall-B Faraday cup Dump and Setup HPS.

Ask MCC to turn OFF the beam, turn OFF and degauss tagger magnet
After tagger magnet is degaussed, change beam configuration on "bta" GUI to "Electron"
Insert Chromax screen on the downstream viewer on the beam
With <10 nA beam, make sure beam is centered on the downstream viewer

Beam should be centered using correctors on 2C21, 2C23, and 2C24 girder. Correctors at 2H02 have been disabled.

Ask for ~10 nA CW beam, watch cctv6 to make sure spot on the downstream viewer is clear and approximately at the center of the screen
If everything looks normal, rates on downstream counters are <10Hz, and on HPS-L and HPS-R are <30Hz at 10nA, send main HPS scaler GUI to the logbook and proceed
Use 2H02A harp to measure beam profile (beam current should not exceed 20 nA), beam size should be X-width ~250 um Y-width < 50 um. Beam should be within ~1mm of December harp scan values.
Turn beam off. Insert SVT Protection Collimator 4mm slit to its nominal position. Vertically scan the collimator, measuring the halo counter rates vs vertical position. Beam should be within ~1mm of center.

Give beams to machine for BPM calibration of downstream beamline.

<font size=3. Energize chicane.,

Energize HPS chicane - ask MCC to turn beam OFF, ramp up magnets to desired currents according to procedures (use the table).
After magnets are at required settings (will take ~40 min) ask MCC for 10 nA beam
Observe beam spot on chromox viewer, beam spot should be at the same place as before magnets were turned ON. If spot is shifted, change Frascati magnets curent to correct the position - if beam is left of the original point current must be lowered, if it is shifted right current must be increased. Do current change with small steps, ~1 Amp
After chicane is set, record halo counter rates, turn beam off and insert HPS target, 4um W
Using table provided change chicane settings to move beam left and right on the target with ~1mm step. First move right, stop when rates on halo counters will increase by several times, then move left until rates will start to go up. Turn beam off every time currents are changed.

Beam
Energy	~2.0 GeV
Current	< 200.0 nA CW
Position
X	Y
~0 mm	~0 mm
Profile
X	Y
< 0.1 mm	< 0.1 mm

Target
#1	0 mm

Magnets
PS Current	0 A
Chicane Dipole #1	0 A
Chicane Dipole #2	0 A

DAQ
Configuration	___________________
Configuration file
Prescales
Thresholds
Events Per Run
Dead Time

Run Coordinator
March 1 - March 11	Stepan Stepanyan
March 12 - March 18	Francios-Xavier Girod
March 19 - April 1	John Jaros
April 2 - April 8	Nathan Baltzell
April 9 - April 15	Takashi Maruyama
April 16 - April 22	Maurik Holtrop
April 23 - April 29	Raphael Dupre
April 30 - May 6	Takashi Maruyama

Physics Division Liaison
Harut Avakian

DAQ On-Call
March 1 - May 4	Sergey Boyarinov

ECAL On-Call
March 1 - March 9	Andrea Celentano
March 9 - March 23	Nathan Baltzell
March 23 - March 30	Holly Vance
March 30 - April 13	Gabriel Charles
April 13 - April 20	Raphael Dupre
April 20 - April 27	Michel Garcon
April 27 - May 4	Holly Vance

SVT On-Call
March 8 - March 14	Sho Uemura
March 15 - March 28	Omar Moreno
March 29 - April 4	Pelle Hansson
April 5 - April 8	Omar Moreno
April 9 - April 19	Matt Graham
April 20 - April 26	Tim Nelson
April 27 - May 4	Sho Uemura

SlowControls On-Call
March 1 - March 18	Hovane Egiyan
March 19 - April 1	Stepan Stepanyan

Webcams:

Slow Controls:

Accelerator:

Offline: