ELOG DESPEC

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

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Entry time:	Sun Sep 7 13:27:24 2025
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<p><strong><em>This elog is the first reliable. Before, the histograms have not been zero'd</em></strong></p> <p>Each test are done and compared for AIDA05.1.8L, compared with the pulser (caracteristics, see attachment1)</p> <p><strong>Test 1: with HT cables shielded</strong></p> <p>Attachment 2: HT = 100V; cable AIDA05 connected --> FWHM = 77 channels (= 51.3 keV) with a top of the curve at 100 cts (AIDA9.1.8L has also been checked and was at 89 channels)</p> <p>Attachment 3: HT = 0V; cable AIDA05 connected --> FWHM = 1757 channels with a top of the curve at 15 cts after almost 40 min because the noise had a baseline of 6500 channels</p> <p>Attachment 4: HT = 0V; cable AIDA05 disconnected --> FWHM = 16 channels with a top of the curve at 110 cts</p> <p>Attachment 5: HT = 100V; cable AIDA05 disconnected --> FWHM = 17 channels with a top of the curve at 110 cts</p> <p><strong>Test 2: with HT cables not shielded</strong></p> <p>Attachment 6: HT = 0V; cable AIDA05 connected --> FWHM = 1452 channels (968 keV) with a top of the curve at 23 cts after 1:15 hours because the noise had a baseline of 7000 channels</p> <p>Attachment 7: HT = 100V; cable AIDA05 connected --> FWHM = 73 channels with a top of the curve at 100 cts</p> <p>Attachment 8: HT = 0V; cable AIDA05 disconnected --> FWHM = 15 channels with a top of the curve at 120 cts</p> <p>Attachment 9: HT = 100V; cable AIDA05 disconnected --> FWHM = 16 channels with a top of the curve at 125 cts</p> <p><strong>Conclusion</strong>: with shielded or unshielded cables, the noise situation seems to be the same, proving that mot of the noise don't come from the cables</p> <p>Other thing that have been noticed is that the peak of the pulser is shifted when the cables are connected compared to when they are not connected: connected: peak at around channel 21675; disconnected: peak at around channel 21925</p> Encoding: HTML ELCode plain Suppress Email notification

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