ELOG CARME

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

CARME

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Entry time:	Fri Apr 4 02:45:27 2025
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Attempted activating 2xUHV1400 connected to top C4, channel #3 with P 300 W (450 C?), t rise 30 min, t hold 90 min as yesterday Power reach 300 W, hold. Temperature increased by 5C. OK. Activated top C4, channel #4 using same set of parameters. Internal temperature increases significantly, up to 140C and still increasing. Decreased power on channel #2 to 100 W (down from 200 W yesterday). Should correspond to 350 C or so. Temperature still increasing. Decreased power on channels #3 and #4 to 250 W (425 C?). Temperature stops increasing. Around 155C on kapton bundle. OK for kapton, detectors would have broken. Baking code detected temperature on internals >150 C and stopped baking for safety. Temperatures do not change - heating provided by NEGs more than enough to maintain current status. Decreased power on channel #2 to 50W (250 C?). Temperature on internals decreases slightly. No major effect. This is likely because the UHV1400 corresponding to #2 are far from the detectors, while #3 and #4 are closer. Decided to complete activation of #3 and #4 using 250 W. Set both to 50C after completion. Temperature of internals decreases quickly. Re-activated baking code when temperature on all internals <150 C. Setpoint 85C on RE72-1 and 95 on -2. Now waiting for internals to cool down. Will activate remaining 3 sets (2+2+3 UHV1400) later today with P 200 W (400 C?) t rise 30 min, t hold 90 min. We know the set of 3 UHV1400 is definitely close to the kapton bundle. P 300 W (100x3) for that set. Encoding: HTML ELCode plain Suppress Email notification

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