The HPS Run Wiki

[edit]

• Shift Documentation
• Short Term Schedule
• Long Term Schedule
• Monitoring

Important Phone Numbers Shift Schedule Shift-Taker's Checklist (old) Hot Checkout Beam Time Accounting HPS Run Spreadsheet

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

Manuals Harp Scans Beam Trip Runs SVT ECal (Annex) DAQ Beamline Turning Chicane ON/OFF Chicane Settings Slow Controls

JLab Logbooks MCC Hall-A Hall-B Hall-C Hall-D

RC: Takashi Maruyama (757) 575-7540 9 575 7540 from Counting Room PDL: Stepan Stepanyan Every Shift: Follow run plan as outlined by RC Once BPMs are calibrated, ask MCC if orbit locks are on, they should be. Keep shift summary up-to-date in HBLOG. Record all that happens. Update the run table on Google Docs. Document any beam condition change and send scaler GUIs to HBLOG Send "scaler_hps" GUI to logbook at least twice per shift or at any time run conditions change Peform 2H02A harp scan once per shift or when beam conditions have 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 SVT 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. Acceptable Beam Conditions: Before accepting beam, make sure all the conditions are met - beam profile and halo rates are what you expect (or very close to it). If unsure call to RC, PDL, or beamline expert! Beam optics setting is such that at 2H02A harp the beam profile will be as requested by HPS,wide in X-direction and narrow in Y. This optics setting will make the beam profile at 2C21 harp narrow in both directions, while profile on the "tagger" or 2C24 harp wide in both directions. The halo counter rates before HPS must be low: UPS-L and UPS-R few Hz/nA, if tagger magnet is energized TAG-L/T/T2 ~10Hz/nA [1], if beam is going to Faraday cup dump then tagger counters and downstream counters should count <<1 Hz/nA 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[2] As halo counters, positions on BPMs and the settings of correctors also must be close to what where before. Always read previous log entries, compare settings of BPMs and correctors with previous settings using scaler_hps GUI. Every Run: a b c d MCC Daily Meetings

Run Plan: March 30-April 5, 2015 (day/swing/owl) All shifts are cancelled. Machine is down for the week. CHL1, which supplies the South Linac, has serious mechanical difficulties with a compressor and won't be available for this run. CHL2 has contaminants in the heat exchanger, and should be recoverable. We'll know more later in the week, including how JLAB management will deal with the problems. All HPS shifts March 30-April 5 are cancelled While the prognosis is not good, it should be possible to run a low energy program that uses just one CHL. This could possibly provide HPS with beams of 1.1 and 2.2 GeV. High energy (10-11 GeV) running would not be possible in this scenario. When we're back, we'll resume our program: 1) MCC re-tunes upstream beam;(2) When beams are acceptable, MCC restores beams to alcove;(3) When decent beams have been reestablished, calibrate downstream bpms (4) post calibration, require good spot on Chromax, low counts on halo counters, and then set-up chicane. 5) scan target vertically and horizontally, measure halo rates vs target; (5) Take data. Subsystem commissioning studies: more trigger commissioning studies, beam trip studies once orbit locks are on. When we're back, proceed with program MCC works on beam optics and matching, and tunes beam to tagger After MCC finishes beam tune and upstream bpms are calibrated record harp scans at 2C21 and 2C24. These must be good scans, good S/N, no tails, and low halo count rates before proceeding. Standards are on this page: ACCEPTABLE BEAM CONDITIONS. make sure no bleedthrough-- counts when no beam? After beam tune is done send HPS scaler GUI to the logbook with comments Restore Beam to the Hall-B Dump Ask MCC to turn OFF the beam. Turn off tagger magnet and change beam configuration to "bta" GUI to "Electron" Have MCC degauss magnet Make sure target is out Insert Chromax screen on the downstream viewer 4mm SVT Protection collimator in place Restore 1 nA CW beam and have MCC bring beam to y~-5mm; x~5mm on the Chromax screen. (distance between dots=5mm). Record spot. Record scalers. Repeat and record 2C21 and 2C24 harp scans and corrector settings. We need these for next time! Record position at 2H02 harp. Repeat at 10 nA. Must have good spots, nominal sizes, no tail to proceed. Position ok? record scalers and beam location on screen. establish orbit locks Energize Chicane follow standard procedures in Beamline manuals for procedures and settings. beam spot on Chromax should be unmoved. If not, tune Frascati slightly. See caution below. Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps (few amps) only. Turn beam off and insert HPS target, 4um W. Restore beam. Check count rates. Do horizontal scan of beam on target. Using table provided, first change Frascati settings, then PS settings to move beam left and right on the target with ~1mm step. Small changes only. Return to nominal beam position. Do vertical scan of target at nominal beam position. Measure halo counter/ecal rates vs target position. Record data and graph. Are we centered? Beamline Expert should enter new target positions if not. Do scan of SVT collimator, measuring counter rates vs SVT collimator position with nominal beam position. If Omar and beamline expert are available during day or swing, do SVT Wire Scan. This still needs an expert. Orbit locks must be temporarily removed to move beam horizontally with upstream correctors, if needed. Restore orbit locks when done. Subsystem Commissioning Studies. Begin Data Taking. DO NOT RUN MORE THAN 30 MINUTES ABOVE 50 nA WITHOUT THE BEAM BLOCKER PUT BEAM BLOCKER IN FOR LONG RUNNING AT HIGH CURRENT Make sure DAQ is OK for data taking More Trigger commissioning data runs. See Valery's note on the run Wiki under commissioning trigger. If orbit locks are on, call Rafayel for beam trip study. Take 4 hours of beam trip data with wire up; take 4 hours of beam trip data with wire down. Absent other requests, take data at 50 nA. Be sure to block Faraday cup if higher current. 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

Trigger
FADC		GTP
NSB/NSA	20/100 ns	Samples Before/After	3/3
Readout Threshold	12 ADC	Seed Threshold	80 MeV
SSP
		Singles-0	Singles-1
# Hits		>2	>2
Cluster Energy		0.1 < E < 2.5 GeV	0.5 < E < 1.2 GeV
		Pairs-0	Pairs-1
Cluster Energy		0.9 < E < 1.3 GeV	0.1 < E < 0.6 GeV
Energy Sum		0.19 GeV < E < 2.2 GeV	0.21 < E < 1.0 GeV
Energy Difference		dE < 1.2 GeV	dE < 0.65 GeV
Coplanarity		N/A	Theta < 40 deg
Energy Slope		N/A	> 0.6 GeV
TI Prescales
Singles-0	Singles-1	Pairs-0	Pairs-1
0	0	0	0

Long Term Schedule Proposal PowerPoint

Accelerator White Board Schedule Weekly Run Coordinator Reports MCC Daily Meetings HPS Shift Schedule

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 Stepan Stepanyan

Beamline On-Call NOW Takashi Maruyama DAQ On-Call NOW 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 Hovanes Egiyan March 19 - April 1 Stepan Stepanyan

Trigger: Expected Trigger Distributions (#Hits: 0, 1, 2, 3)

Webcams: Tagger Beam Dump Viewer Faraday Cup Viewer ECal Chiller Viewer ECal LV Supply Viewer Alcove Viewer

Accelerator: End Station Status Accelerator Ops 1 Accelerator Ops 2 Accelerator White Board Schedule Slow Controls: HPS MYA Variables Hall B EPICS Database

Online & Offline: Monitoring Gui Run Spreadsheet HPS Data Catalog Jenkins / Nexus Shift Docs @ GitHub