ELOG CARME

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

CARME

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Mon Nov 22 08:06:01 2021

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08:20 Temperature of channels 1-3 and 5-6 were reduced to 120 degrees. Immediately after, the conditioning of the NEGs was stopped and D2000s ion pumps were flashed 5 times. The temperature of the gas jet target and the electron target channels was reduced to 120 degrees.

11:00 Started activation of D2000 following procedure in ... at T=400 C for trise 30 min + thold 90 minute. After activation, NEG elements are left at 200 C to maintain cleanliness. Temperatures increasing, but still well below safety margins.

16:00 Started activation of NEGs from channel 1 at 200 W. No effects on temperatures. Activated channel 2 as well. No significant effects. Increased activation power to 250 W. No issues

16:30 Given temperatures are still low decided to activate 3 and 4 with 230 W (Vs. 150 W last time). Ok for 30 minutes then temperature starts increasing a bit too quickly. Decreased to 200 W. Ok.

18:45 Activation all NEGs on middle module complete. Left overnight to stabilise / cool.

21:00 Channel 6 of the heater stops responding properly. ML asked HKR to disable. No effects on temperatures.

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