11:01

Run 35 started cooled beam on target

Detectors IN (left arm pot =36.5 mm, right arm pot = 70.49 mm)

Electron cooler voltage 751.4 this corresponds to 1.3436 MeV/u. This should be on the peak of the resonance.

Target density is 3.75e11 at/cm2, ring pressure looks OK YR09 1.43e-10 mbar.

Horizontal beam position is -7.5 mm, vertical beam position is 0.0 mm. Same as run 33.

Beam is in the ring for 8 seconds and total cycle time between injections is 12 seconds. Same as run 33

Beam injection looks stable. ~2e7 injected and no missed injections so far.

Merger OK, Tape server OK

Merger statistics zero'd

All histograms and statistics zero'd, monitoring code reset.

ADC data item statistics looks as before, very few counts until injection into the ring. OK

FEE temperatures look OK

System checks OK

Leakage current trending upwards, same as previous elog.

13:33

FEE temperatures OK - all FEEs at least 1.5C below vertex warning

ADC data items statistics OK

Merger and Tape server OK

Target density 3.8e11 at/cm2, ring pressure stable.

Ring injections look very stable

Leakage current now decreasing (attachment 1)

Monitoring code xy and energy histograms (attachment 2+3)

15:03

System wide checks ok. Merger ok. Temperatures ok.

Attatchment 4: Stats

Attatchment 5: Temperatures

Attatchments 6-9: Waveforms.

Attatchment 10: Leakage current

Attatchment 11: lowenergyEytotal plots

17:09

System wide check ok. Merger ok. Temperature ok.

Attachment 12: Stats

Attachment 13: Temperatures

Attachment 14-18: Waveforms (Layout 7: strange behaviour in aida01, went to ASIC Control and did "Check ASIC control" three times, which resolved the problem)

Attachment 19: Leakage current

Attachment 20: lowenergyEytotal plots

Gas pressure was going up a little bit: changed Y position of the nozzle from 1000 to 950.

17:55

The gas jet target pressure started to fall sharply at 17:34 and went down to zero within 2 minutes.

It came back while it we were changing the nozzle position but at 17:49 fell to zero again.

Currently waiting for Nikos to came and have look at it.

18:10

Target back in place and has a density of 4.04e11. Beam transformer looks similar to pre plummeting target density.

18.55 Check ASIC load FEE64 aida16 asic#3 HEC channels active

 Following check load merger rate decreased significantly.

19:14

Gas density remains stable around 4e11 after the incident at 17:34 and the beam transformer singal looks ok too. Gas pressure ok.

Merger: All aidas turn green but the merger has decreased significantly (too about 306 000 items/sec) as mentioned above.

System wide check ok. Temperature ok.

Attachment 21: Stats

Attachment 22: Temperatures

Attachment 23-26: Waveforms

Attachment 27: Leakage current