01:10

Gas target turned off via the shutter valve.

Run 49 started beam only background run.

Slow comparator threshold lowered to 0x14 (200 keV) in preparation for the energy change tomorrow morning.

Other than that no changes to the DAQ or to the experimental setup.

D+ beam remains at 0.5 MeV nominally. All four detectors positioned fully out and stationary,

I tried to re-bias detector #4 however was not able to bias past 70V. DSSD4 remains off and set to the MEC (0x1). (see attchement 1)

Ring cycle is every 10 seconds. Beam position unchanged, Beam position. Vertical =0.0mm , Horizontal=0.0 mm

Ring vacuum is now 3.16e-11 mbar. Before switching off the gas target density was 2e12 at/cm2

Data rate is 89 kB/sec

ADC data items stats remain largely unchanged at new threshold. (see attachment 2)

Aida01 has increased to several thousand. Tried check ASIC control on asic #4 of aida01->no effect on higher rates.

01:20

All checks OK.

After 20 minutes of running see energy histogram and xy histogram (attachments 3,4)

Interesting xy pattern (hydrogen? Injection noise?)

Note put aida13-aida16 slow comparator threshold back to 0x24 as we had some rates coming through (~1kHz) which is now back to zero. If we revive the detector in the morning, the thresholds should be lowered in line with other detectors.

03:00

All checks OK

04:30

All checks ok

7:20

All checks ok

Run stopped, final energy histogram and xy histogram attached.