16:34
Like Run 73, but particle detector in YR10 now active, and recorded in MBS.
Clear effect of target on beam lifetime. Target off -> nearly no counts.
Attachment 22 - IPM (no target)
Attachment 23 - IPM (target)
Attachment 24 - YR10 particle detector (gap in events corresponds to target off period)
16.42 DSSSD bias & leakage current - attachments 1-2
DSSSD #4 currently conditioning at -20V
FEE64 temperatures OK - attachment 3
ADC, DISC, PAUSE & RESUME data item stats - attachments 4-7
System wide checks OK *except* WR deocder status aida04 - attachment 8
WR timestamps OK - attachment 9
per FEE64 Rate spectra - attachments 10-12
per FEE64 1.8.L spectra - attachments 13-14
per FEE64 1.8.W spectra - 20us FSR - attachments 15-16
pulser peak width aida06 69 ch FWHM, aida08 67 ch FWHM
Merger, TapeServer OK - attachments 17-18
ASIC settings 2025Apr08-13.45.30
aida01-aida04 slow comparator 0xc
aida05-aida12 slow comparator 0x8
aida13-aida16 slow comparator 0x64, LEC/MEC 0x1
17.23 CRYRING vacuum and temperature - attachments 19-21
17.34 routine checks OK
target density c. 5e+12, beam 3e+6
18.40 changed target x,y position to check correlation between target density and detector counts. New position: x:-1500, y:2400.
checks OK.
target density c. 3.7e+12, beam 3.1e+6
20.00 online analysis - per DSSSD energy spectra - attachment 25
t, h and p energy peaks clearly observed DSSSD #1 and #2 - p energy peak less clear in DSSSD #3
20.30 checks ok
target density increased to c. 5e+12 for some minutes then back at c. 3.7e+12, beam 3.1e+6.
21.47 checks ok
target density increased to c. 5.7e+12 around 21.35, then back at c. 3.7e+12. beam 3.1e+6.
22.30 online analysis - per DSSSD energy spectra - attachment 26
22.35 Analysis of data file G22-205/R74_29 - attachment 27
no timewarps, all deadtimes << 1%
22.45 DSSSD#4 bias -20V -> -40V, leakage current -2.7uA -> -4.09uA
23.14 DSSS\D#4 leakage current c. -9uA, return to bias -20V
23.21 target density slightly unstable in the last hour, changed nozzle position to x=-2000, y=2500.
00:04
Temps OK
System wide checks OK
Rates OK
Merger OK (1400 kb/s)
Target oscillating, but looks usable. Need to have another look at temperatures tomorrow morning.
01:57
Temps OK
Rates OK
Merger OK
Target getting thicker.
05:00
Temps OK
Rates OK
Merger OK
Target fluctuating
7:20 All sysytem checks ok. Target lost density @ 6;55 from 4.6e12 to 2.6e12 - will try moving. Update 7:30 after moving density back up to 4.4e12.
8:45 All Checks ok but target is fluctuating - really wants to be around 2e12. Had it up to 5e12 about 25 mins ago. Naughty target tbh.
9:25 All checks ok, gone to no storage as now tuning next beam energy.
10:30 All system checks OK, still tuning.
11:38 All system checks ok, still tuning. Frank entered cave to adjust magnetic field as the beam was not cooling at 90 keV/A
12:36 All checks okay, cave still open
13:40 All checks okay, tuning beam currently
14:50 All Checks OK. Target beam overlap currently happening - scanning range not showing anything. Target back on but not hitting - thickness 1.2e12.
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