Difference between revisions of "Run summary for commissioning in spring 2016"

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*  <b>Still 4 pass here, but spectrometer moved for DVCS calibration and then moved back before the following runs</b>
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*  <b>Still 4 pass here, but spectrometer moved for DVCS calibration and then moved back before the following runs. Raster size in MCC unit also changed (check image of carbon hole target and raster current in start- and end-of-run for details)</b>
 
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Revision as of 16:05, 9 April 2016

BPM calibration runs (Bull's eye scan)

Relative position LHRS CODA run RHRS CODA run Harp scan entry no.
(0,0) 12454 21781 3379157
(2,2) 12455 21782 3379165
(2,-2) 12456 21783 3379172
(-2,-2) 12457 21784 3379184
(-2,2) 12458 21785 3379191
(0,0) 12459 21786 3379201

BCM calibration runs

LHRS CODA run RHRS CODA run BCM logger Comments
12382 21731 /a/opsuser/hacuser/BCMLOG/bcm_log_02-07-2016-23-24-07.log
12514 21807 /a/opsuser/hacuser/BCMLOG/bcm_log_02-16-2016-20-07-42.log The details can be found in halog entry 3380376 and comment therein
12916 22097 /a/opsuser/hacuser/BCMLOG/bcm_log_03-04-2016-09-40-14.log Max 30uA (see strip chart); comments and halog entry about beam loss

Elastic production runs

  • 2nd Pass (Ebeam = 4.5 GeV)
Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Q2 [GeV2] Comment
21799 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Only one set of raster coils is in use; ps1,2,3=1, ps8=100
21809 - 21820 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Only one set of raster coils is in use; ps1,2,3=1, ps8=100; Signals for 16 straws missing in all three V planes
21824 - 21831 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Same as above
21832 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Beam tripped in the middle of this run, production only lasted for an hour (run time is about 3 hours); same as above
21844 - 21857 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21869 - 21871 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Same as above
21872 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Beam turned off 30 mins after run started; same as above
21875 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Asked MCC to restore beam position 25 mins after run started; Straw chamber issues in V2 plane still exist
21876 - 21887 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21889 - 21893 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21894 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Beam position moving second half of run; straw chamber issues in V2 plane still exist
21895 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Last 16 minutes no beam; straw chamber issues in V2 plane still exist
21896 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21897 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Last 25 minutes no beam; straw chamber issues in V2 plane still exist
21898 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21900 - 21901 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21903 - 21915 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
21918 - 21925 15cm LH2 2 x 2 mm2 4.481 1.547 52.91 5.5 Straw chamber issues in V2 plane still exist
  • 4th Pass (Ebeam = 8.8 GeV)
Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Q2 [GeV2] Comment
22027 - 22034, 22036 - 22044, 22047 - 22055, 22058 - 22062 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22067 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 Very short run; ps1,2,3=1, ps8=200
22076 - 22077 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22079 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 Very short run; ps1,2,3=1, ps8=200
22080 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 Very short run; 10uA; ps1,2,3=1, ps8=200
22081 - 22083 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 Beam very trippy; 10uA; ps1,2,3=1, ps8=200
22085 - 22087 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 10uA; ps1,2,3=1, ps8=200
22088 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 Very short run; 10uA; ps1,2,3=1, ps8=200
22093 - 22095 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22098 - 22102 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22103 - 22108 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22114 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 No beam during last 25 mins; ps1,2,3=1, ps8=200
22115 - 22128 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22130 - 22154 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200; beam off for much of run 22146
22155 - 22157 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200; 5 uA
22158 - 22160 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22161 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200; very short run
22162-22167 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200; these are all short runs (about 30-40 mins)
22168-22172 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
22174-22181 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
  • Still 4 pass here, but spectrometer moved for DVCS calibration and then moved back before the following runs. Raster size in MCC unit also changed (check image of carbon hole target and raster current in start- and end-of-run for details)
Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Q2 [GeV2] Comment
22263 - 22264 15cm LH2 2 x 2 mm2 8.841 2.101 48.75 12.65 ps1,2,3=1, ps8=200
  • 5th Pass (Ebeam = 11.0 GeV)
Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Q2 [GeV2] Comment
22196-22197,22202-22207, 22209-22212 15cm LH2 2 x 2 mm2 11.021 2.204 48.75 16.54 ps1,2,3=1, ps8=200
22225-22229, 22235-22236, 22238, 22240-22241 15cm LH2 2 x 2 mm2 11.021 2.204 48.75 16.54 ps1,2,3=1, ps8=200

Runs on dummy target

Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Comment
21916 15cm dummy 2 x 2 mm2 4.481 1.547 52.91 Only one set of raster coils is in use; ps1,2,3=1, ps8=100;short dummy run at 10 uA; hydrogen elastic
21917 15cm dummy 2 x 2 mm2 4.481 1.547 52.91 Only one set of raster coils is in use; ps1,2,3=1, ps8=100;dummy run at 15 uA, 20 minutes no beam middle of run; hydrogen elastic
21936 15cm dummy 2 x 2 mm2 4.481 0.85 52.91 Only one set of raster coils is in use; ps1,2,3=1, ps8=100; inelastic kinematics
21937 15cm dummy 2 x 2 mm2 4.481 0.85 52.91 Only one set of raster coils is in use; ps1,2,3=1, ps8=100; inelastic kinematics

Spectrometer pointing runs

Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Comment
21928 - 21929 Multi-foil carbon Off 4.48 0.85 52.91 ps1,2,3=1, ps8=100
12650 - 12651 Multi-foil carbon Off 4.48 1.485 37.14 DVCS config, ps9=1
22110 Multi-foil carbon Off 8.841 0.85 48.75 ps1,2,3=1, ps8=100
22173 Multi-foil carbon Off 8.841 2.101 48.75 ps1,2,3=1, ps8=200

Inelastic runs on LH2

Run number Target Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Comment
21938 - 21939 15cm LH2 2 x 2 mm2 4.48 0.85 52.91 ps1,2,3=1, ps8=100

Optics commissioning runs

  • A full description of the run plan can be found here.
  • Survey results of spectrometer positions can be found here.
  • Step R1: Procedure with Sieve-slit
Run number Target Sieve Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Comment
21950 - 21967, 21969 - 21972 Multi-foil carbon Yes Off 2.30 0.75 48.75 ps1,2,3=1; Beam position not stable for runs 21950,21951; Straw chamber missing signals restored before run 21950
21973 - 21974 Single-foil carbon Yes Off 2.30 0.75 48.75 ps1,2,3=1
21988, 21990 - 21991 Single-foil carbon Yes Off 2.30 0.75 48.75 ps1,2=1,ps3=0; Noise in Cherenkov spectrum and VDC, straw chamber hit patterns is seen when triggering on s2m&&GC
21992-21995 15cm LH2 Yes 2x2 mm2 2.30 0.75 48.75 ps1,2=1, ps3=0; Noise in Cherenkov spectrum and VDC, straw chamber hit patterns is seen when triggering on s2m&&GC
  • Step R2: Delta Scan with Proton Elastic (without sieve slit)
Run number Target Sieve Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Comment
22006 15cm LH2 No 2 x 2 mm2 2.30 1.304 48.75 Delta scan ΔP=-4%; ps1,2=1
22007 15cm LH2 No 2 x 2 mm2 2.30 1.279 48.75 Delta scan ΔP=-2%; ps1,2=1
22008 15cm LH2 No 2 x 2 mm2 2.30 1.254 48.75 Delta scan ΔP=0%; ps1,2=1
22011 15cm LH2 No 2 x 2 mm2 2.30 1.229 48.75 Delta scan ΔP=+2%; statistics a bit low; ps1,2=1
22013 15cm LH2 No 2 x 2 mm2 2.30 1.203 48.75 Delta scan ΔP=+4%; ps1,2=1; dipole not stable in run 22012
  • Step R3: Dummy Target Runs
Run number Target Sieve Raster Ebeam [GeV] P0 [GeV/c] θe [deg] Comment
22009 - 22010 15cm dummy No 2 x 2 mm2 2.30 1.254 48.75 ps1,2=1

Beam energy measurement

  • This is a collection of halog entries on the beam energy measurement. It might not be complete, and some of them might not be useful. I just keep them here for future reference.
*1st Pass Bdl Measurement (beam not yet to the hall)
*Bdl for flat orbit through ARC
*QuickPic - harps C18A/C18B for energy measurement
*NMR after restoration
*Wien Angle For Hall A @ 8.8 GeV
*Hall A 8.843 GeV ARC Central Ray (Bdl & NMR)
*9th Dipole Bdl / NMR / Current (central ray energy 8841 MeV)
*Current Beam Energy In Hall A ~ 8845 MeV (by different techniques)
*Dispersive Orbit (8842 MeV)
*Minor Bdl Change
*Larger Wien Angle Consistent with ARC Energy Measurement Results
*4th Pass Bdl & Current Check Before I vs. Bdl Scan
*Hall A 9th Dipole Map (downward)
*9th Dipole Mapping Issues | NMR & Position Working
*9th Dipole Mapping Issues | Follow-up
*Follow-up Re: Hall A 9th Dipole Map (downward)
*9th Diple Bdl Scan (upward)
*~11 GeV Bdl Measurement
*9th Dipole Scan (upward, 100 A steps)
*9th Dipole 532.7A Bdl
*Finished 9th Dipole Scans
*Spin precession for Hall A @ 5-pass
*ARC1 & 2 Measured Beam Energy After Long Down
*11GeV 5th Pass Hall A ARC Energy (Bdl only)
*Monitoring ARC NMR from "cold start" of the magnet
*11 GeV Dispersive Orbit !!
*Shift in Bdl

Some cosmic runs

Run number Comment
22024 - 22025, 22065 ps1,2,3=1, ps8=200
22066 Beam back to the hall in the last four hours of the run; ps1,2,3=1, ps8=200
22073 ps1,2,3=1, ps8=200
22074 Beam back to the hall in the last one and a half hours of the run; ps1,2,3=1, ps8=200
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