ELOG ISOLDE

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

ISOLDE

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Entry time:	Thu Apr 3 19:29:14 2025
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Transcription of paper logbook for runs. Please check as I cannot read all the writing. Wednesday 13/9/2017 Detectors installed: 2083-9, 74 um, dE layer 3080-23, 1012 um, E layer 2410-23, 65 um, HI layer Det. Bias Leak dE -24 0.46 E -350 2.61 HI -14 1.05 Runs 0 - 5 : junk Run 10 Header: Alpha calibration Date: 13/9/2017 Start: 18:03 (CERN) Stop: 18:12 Note: Some cables disconnected to test CANNOT READ Run 11 Header: Alpha calibration Date: 13/9/2017 Start: 18:16 Stop: Notes: ADC Ch Notes 1 0-15 ok 1 16-31 2 0-15 7+8 only pulser 2 16-31 ok 3 0-15 only pulser 3 16-31 19 low gain (other notes but crossed out) 4 0-15 6 low (noise?), rest fine 4 16-31 only pulser 5 0-15 "probably okay" 5 16-31 "probably okay" 6 0-31 "probably okay" ------- Thursday 14/9/2017 Det. Bias Leak dE -24 0.44 E -351 2.4 HI -14 0.95 Run 12 Header: Date: 14/9/2017 Start: 11:50 Stop: 12:08 Note: Bad. Pulser switched on through run Run 13 Header: Pulser ON Date: 14/9/2017 Start: 12:07 Stop: Notes: good ADC Notes 1 ch 0 ... bad resolution in pulser 2 ch 7,8 no alphas 3 ch 0 low gain, ch 0-15 almost only pulser but maybe shieled from alpha source & low noise 3 ch 24 low resolution 4 ch 6 no alphas, ch 7 low gain for alphas but not for pulser 4 ch 16-31 no alpha (maybe shielded & low noise) 5 okay 6 okay TDC missing #1-32, #1-80,120,123 14:00 before turning off biases: Det. Bias Leak dE -24 0.4 E -351 2.15 HI -14.5 0.89 15:15 - Vent to remove dE layer Extra SSD cable arrives TDC mapping Det. Side TDC ch dE p+n 16-63 E n+n 64-79 HI p+n 80-127 Bias detectors Det. Bias Leak E -350 1.83 HI -14 0.8 Run 15 Header: Date: 14/9/2017 Start: 18:22 Stop: 18:25 Notes: Bad. Pulser to 2 Hz Run 16 Header: Alpha source in front of E detector Date: 14/9/2017 Start: 18:31 Stop: Notes: Bad. CANNOT READ Run 17 Header: Date: 14/9/2017 Start: 18:32 Stop: Notes: Bad. ADC #4 ch 6, 7 bad. Switch U7e8 (??) (n+n side p+n) from E detector Problem moved -> CANNOT READ ------- Friday 15/9/2017 10:00 bias detectors Det. Bias Leak E -351 2.13 HI -14.5 0.88 T: -4.9 C P: 4.9 x 10^-6 mbar Run 19 Header: alpha-calib of E layer 3080-23 Date: 15/9/2017 Start: Stop: Notes: No TDC data ...? ADC Ch Comments 1 0-31 Pulser (only) in all channels except ch2 which has a few counts across whole spectrum (hair) Resolutions range from 2.0 -> 7.0 Pulser centroid ~ channel 2800 in all spectra (except ch 2 of course) 2 0-15 Pulser in all channels, ~channel 2000 (i.e. similar gains) Resolution ~ 2.0 ch, except ch 8 sigma = 4.5 ch 2 16-31 Pulser in all channels at ~channel 3000 Resolution ~ 2.0 ch, excehpt ch 24 which is 6.7 ch & ch 16: 4.35 ch. 3 0-31 Pulser & alphas in all channels (Not 19...see below) Resolution is poor in ch0 All gains look similar Alpha spectra in similar channel numbers as for other ADCs, but pulser at only 1/2 the channel number (A drawing is given to compare ch0 to ch1-15.) 3 19 Gain seems very low Pulser @ channel 430, alphas @ channel 200 So about 1/5 of gain of others in ADC 3 channels 4 0-15 All but ch 6 very similar (good) ch 6: Pulser in similar channel to other spectra, but narrower (~4 ch, c.f. ~8-10 channels for other spectra.) And alphas are much lower gain, appearing ~ ch 70, c.f. 1100 for others 4 16-31 All okay. Triple alpha @ ~ channel 1150, pulser @ 2800 5 0-31 All okay (though low gain - deliberately) 6 0-31 Ok, see above for ADC 5 notes. Det. Bias Leak E -351 2.08 HI -14.5 0.88 Restart MIDAS; VME crate => TDC signals return 12:02 Removed E layer #3080-23 (HI layer #2410-23 remains unchanged) New 1035 um Si installed #2951-22. It uses a different bias voltage than the previous E layer (-160 vs. -351 V) 12:50 Stop DAQ (run 22 larger than necessary) Run 23 (?? no note) Header: Date: Start: Stop: Notes: ADC ch Comments 1 0-15 Pulser only, similar gains ch 2 no pulser (hair) No alphas (unsurprising!) 1 16-31 Pulser only, similar gains All okay. (No alphas, unsurprising!) 2 0-31 Pulser only, no alphas, similar gains All okay 3 0-15 Pulser + alphas alphas in all strips alpha similar gains and resolutions pulser in ch 0 at ~1/2 amplitude 3 16-31 Pulser + alphas. ch 19 pulser and alphas at much reduced channel number ~1/5 gain 4 0-15 Pulser + alphas ch 6 no alphas - Pulser narrow (no detector capacitence?) ch 7 alphas at reduced gain (~1/5), pulser narrow 4 16-31 All good 5 0-31 All good (low gains - by design) 6 0-31 All good (low gains - by design) v767 #1 TDC ch Comments 0 1 peak 1-15 No data 16-31 1 peak 32 No peaoks 33 1 peak + 1 small peak 34-44 2 peaks 45-47 1 peak 48 1 peak + hair 49-52 1 peak 53 1 peak + hair 54-56 2 peaks 57-63 1 peak 64-79 broad region of data (alphas?) 80-86 1 peak 87 1 peak + 1 smaller peak 88 Mainly 1 or 2 peaks + lots of hair 89 1 peak 90,91 2 peaks 92-95 1 peak 96 1 peak 97-127 Mainly 1 peak Cable for 1 mm E detector must be faulty Before opening the chamber: Det. Bias Leak E -160 1.12 HI -14.5 0.92 (When trying to switch the cable to the SSD, apparently it was not fully connected. Some time is lost to pump, vent, check, etc) After new cabling is confirmed and evacuation is complete: Det. Bias Leak E -160 1.17 HI 14.5 0.96 Run 24 Header: Check new cable Date: 15/9/2017 Start: 16:18 (UK) Stop: 16:35 (UK) Notes: ADC ch Comments 3 0-15 okay 3 16-31 ch 19 low gain 4 0-15 ch 5, ch 7 low gain 4 16-31 okay Encoding: HTML ELCode plain Suppress Email notification

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