ELOG AIDA

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

AIDA

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Entry time:	Sat Mar 29 11:15:12 2025
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> > 1130: Rotated forward water inlet connection to point towards rear of AIDA stand to remedy mechanical > conflict with EURICA support frame - see attachments. During drain and re-fill of Julabo FL1106 > recirculating chiller no evidence of sediment in, or discoloration of, the water. Coolant loop closed > and tested OK. > > CG installing (new, production batch) second and third MSL type BB18(DS)-1000 detectors to stack using > the new FCT reduced capacitance 0.9m, 68-way to 68-way, flexible Kapton PCBs - see attachments. > > 1200: Installed two new BB18 detectors (3131-11 and 3058-09) to nose mount. > Modified isolated kaptons labelled and number 1 and 5. > Source (207Bi) mounted upstream of first detector approx 5-10mm away. > > Configuration - 3131-11 (#1) furthest upstream, 3058-09 (#2) in middle, 2977-20 (#3) at rear, followed by > 10mm of Al. > > 1800: Cabled everything up. > 3131-11 connected to nnaida10+6 (p-side) and nnaida11+16 (n-side). HV from single supply. > 3058-09 connected to nnaida2+5 (p-side) and nnaida4+7 (n-side). HV from ch0 of quad supply. > 2977-20 connected to nnaida1+14 (p-side) and nnaida3+8 (n-side). HV from ch1 of quad supply. > > Typical resistance of new kaptons ~6.5 ohm. > Typical resistance of old kaptons ~3.2 ohm. > Makes sense if track width has been roughly halved, doubling resistivity. > > At +100V bias: > - 3131-11 has leakage current 5.88 uA. > - 3058-09 has leakage current 3.82 uA. > - 2977-20 has leakage current 10.99 uA. > > 2000: Carried out brief pulser test of all connected modules. > Many spectra exhibit double-peaking of the pulser peak or otherwise non-Gaussian peaks. > Of the ones the have single Gaussian shaped peaks, many now have much larger FWHM than previously observed. Encoding: HTML ELCode plain Suppress Email notification

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