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

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Entry time:	Sat Mar 29 11:41:54 2025
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<p>We are trying to bias each system on its own and in sequence biasing each other detector system to see the interdependence.<br />  </p> <p>HV OK. TEMP OK. Attachment 1 &2.</p> <p>9.43 bPlast unbiased, BB7 unbiased. Attachments 3-6 is the noise situation with only AIDA biased (bPlast was biased but turned off after AIDA was biased.)</p> <p>10/16 FEEs < 20k noise. Max noise is 250k. Downstream AIDA appears to be seeing additional noise since S100.</p> <p><br /> 11:21 Returning after an hour the noise has increased significantly in many channels. Scale changed to 10000 in histograms, it appears that the problem is from a couple hot channels.</p> <p>11:41 'Power' cycled AIDA turned off. bPlast turned on, on its own, then BB7. bPlast doesn't seem to notice anything.</p> <p>12:21 bPlast and BB7 on. AIDA ON. Rates and histograms given by attachment 7-8. More FEEs noisy, but same level as 11:21. There appears to be the same noisy channel in all of the FEEs (?) Some grounding not properly accounted for, or a wire touching somewhere (?)</p> <p>13:55h: AIDA & BB7 on. Rates and histograms given in attachments 9-10. Same level as bplast & AIDA on. Same noisy channels in FEEs. According to Nic, these correspond to the end of the ribbon cables & is normal.</p> <p>13:59 AIDA, bPlast & BB7 on before lunch. Same levels of noise as in previous combinations (attachments 11-12).</p> <p>So it seems we can run with the three sub-systems biased simultaneously.</p> <p> </p> <p> </p> Encoding: HTML ELCode plain Suppress Email notification

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