Difference between revisions of "The HPS Run Wiki"

Revision as of 21:49, 8 December 2014

[edit]

HPS Phone/Pager Numbers

Checklists

Procedures

Commissioning Plans:
- Beamline
- Trigger
- ECal
- SVT
SVT TOSP (1,2,3)

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
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
Continuously check quality of data

Every Run:

a
b
c
d

MCC Daily Meetings

Run Plan: Dec. 8 - Dec. 10

Beamline commissioning studies using the Hall B dump, followed by studies of the ECal and Trigger. The goal is to get usable CW beam to the Hall-B dump, set up the chicane, and begin to study beam backgrounds and trigger rates.

Re-establish CW 1 pass beam to the Hall-B dump, setting beam to specified settings at the dump screen and the 2H02 harp. Chicane off. 5 nA.
Study the dependence of halo counter rates on beam position. Vary x and y of beam by +/- 7.5 mm, with beams parallel to specified settings above.

Record scaler rates, BPMs, 2H02 harp, and beam location on dump screen. Choose nominal position close to rate minimum, at old nominal, if possible.

With beam at nominal, set up chicane to specified currents for the -7% field point. Instructions provided in Counting House. Verify harp scan and record

location on dump screen. Tweak Frascati current if necessary, and record. Record scaler rates.

Ditto for -9% beam position.
If little change in scaler rates, use -7% setting as chicane standard. If large improvement in scaler rates in going to -9%, try -11%.
Select standard chicane settings.
Commission the HPS target, including measuring noise rates in the Ecal and halo counters vs beam current. Call Stepan before first use of target.
With 1.5 um Pt target, measure scalers and Ecal occ vs beam current.Record Ecal Scalers and scalaer display for each beam current.
If time allows, begin commissioning the Ecal and trigger with beam on target and data taking.
- See Full PDF, Click Here
- With any issue, contact Beamline Expert, Ecal Expert, DAQ Expert or RC.

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

@@ Line 97: / Line 97: @@
 | valign=top |
-== Run Plan: Dec. 7 - Dec. 9 ==
+== Run Plan: Dec. 8 - Dec. 10 ==
 '''<font size=3> Beamline commissioning studies using the Hall B dump, followed by studies of the ECal and Trigger. The goal is to get usable CW beam to the Hall-B dump, set up the chicane, and begin to study beam backgrounds and trigger rates.  </font>'''
-* Establish CW 1 pass beam to the Hall-B  dump, including checkout of all new beamline components, BPMs, quads, correctors, and harps.
+* Re-establish CW 1 pass beam to the Hall-B  dump, setting beam to specified settings at the dump screen  and the 2H02 harp. Chicane off. 5 nA.
-* Work with MCC crew to establish small size stable beam at the alcove harp - beam parameters sig X ~ 150 micron, sig Y ~50 micron, with low noise in the downstream halo counters and ecal.
+* Study the dependence of halo counter rates on beam position. Vary x and y of beam by +/- 7.5 mm, with beams parallel to specified settings above.
-* Perform harp scans using 2H02 harp. Optimize halo counter voltages as needed.
+Record scaler rates, BPMs, 2H02 harp, and beam location on dump screen. Choose nominal position close to rate minimum, at old nominal, if possible.
-* Once good beam is established, commission the chicane magnet, including a study of noise rates (halo counters + ecal) vs B field. (We may need to run slightly lower than nominal B for our given beam energy to afford adequate clearance to the 3 inch beam pipe connected to the new target assembly.The beam pipe must accommodate both straight through and Frascati bent beams.)
+* With beam at nominal, set up chicane to specified currents for the -7% field point. Instructions provided in Counting House. Verify harp scan and record
-* Commission the HPS target, including measuring noise rates in the Ecal and halo counters vs beam current.
+location on dump screen. Tweak Frascati current if necessary, and record. Record scaler rates.
+* Ditto for -9% beam position.
+* If little change in scaler rates, use -7% setting as chicane standard. If large improvement in scaler rates in going to -9%, try -11%.
+* Select standard chicane settings.
+* Commission the HPS target, including measuring noise rates in the Ecal and halo counters vs beam current. Call Stepan before first use of target.
+* With 1.5 um Pt target, measure scalers and Ecal occ vs beam current.Record Ecal Scalers and scalaer display for each beam current.
 * If time allows, begin commissioning the Ecal and trigger with beam on target and data taking.
 ** See <b>[[Media:dec4_beamline_commissioning.pdf|Full PDF, Click Here]]</b>
-** With any issue, contact Beamline Expert or RC.</font>
+** With any issue, contact Beamline Expert, Ecal Expert, DAQ Expert or RC.</font>
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