Log entry time 00:02:07 on February 16, 2011

Entry number 220558

Swing Shift Summary 02/15/2011
Shift Crew:
SL: Nuruzzaman
TO: Vladas Tvaskis
Others: Jeong Han Lee, Don, D.Gaskell, A.Narayan, Jean-Francois Rajotte

Typical operating parameters during the shift:

Incidents:

• 16.00: Starting swing shift with no beam.
• 16.14: Beam is OFF due to injector problem.
• 16.55: Escorted access. Andy et.al. for 3h09D valve problem.
• 17.20: Hall is back to beam permit.
• 19.44: Escorted access. Dave G et al. for Compton computer installation.
• 19.45: CODA crashed. Restarted CODA and rebooted all the ROCs. Worked fine.
• 20.30: Back to beam permit, started production run.

Issues may need to consider:

1. Hall-C gate valve 3h09D having problem due to leak here.
2. CODA crashed once.
3. CODA Run controller shows different run # with HCLOG. Talked to Expert, fixed it. See details.
4. COMPTON ROC 1 crashed CODA several times. Expert need to have a look at it.
5. May need to change Ethane gas bottle!! Manifold seems a little low 250/68. (Although it was 300/50 during OWL).

Runs taken: 10060 - 10071

Production Runs: 10060 - 10071

• 10060: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Not a proper production run. Beam was on at the beginning but went off within 1st couple of minutes.
• 10063: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Production Run, looks ok.
• 10064: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Production Run. Sensitivity does not showed anything. May be not a good run.
• 10068: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Production Run, looks ok.
• 10069: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Production Run, looks ok.
• 10070: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Production Run, looks ok.
• 10071: Target LH2; 150 uA; 3.5x3.5 mm; HWP=IN; FFB,FF,QTOR(8921A),MD,LUMI,HALO 3 & 4, BMOD=ON.
  Comments: Production Run, looks ok.

Pedestal Runs: 10066

• Comments: The analysis can be found here.

Injector Runs: 2172, 2173

• Comments: Also analyzed these runs.

Compton Runs: 20889 - 20901

• Comments: Photon det HV 1600 V.

DAQ Test Runs: 10061, 10062, 10067

• Comments: DAQ expert took these runs. Run 10067 was after fixing the run # discrepancy.

Analysis:

1. Analysis during the swing shift for the runs 10063, 10064, 10068, 10069, 10070, 10071.
2. Sensitivities using 100k events during the shift can be found here.

Comments:

1. Charge feedback worked fine during the shift.
2. OWL shift crew should change HW plate after few hours (If everything goes smoothly). I didn't change it as we missed couple of hours and had escorted acess twice. I already passed this information to next shift crew.
3. Halo rates, beam current, charge asymmetry and Compton scint. rate for swing shift can be found here.
4. Status of Hall-C gate valve 3h09D for swing shift can be found here.