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 Aug 16 18:15:37 2025
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<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><p> A late entry for the work I carried out on Thursday.</p> <p>With the Emco box providing the HV, the pulser peak showed double (or triple) peaks. This was not seen with the SY1527 so I thought this would be better for looking at peak widths.</p> <p>Same ASIC settings my previous entry, and a HV of 200V with leakage current 3.8uA.</p> <p>I varied the shaping time in each module using the ASIC4 control page as this also changes the hold time automatically. Slow comparitor threshold of 64.</p> <p>Checked each module and took sample channels from a couple of ASICs in each but made qualitative comparisons with random channels in all ASICs to make sure the chosen ones were representative of the ASIC/module as a whole.</p> <p>Tables and graphs are included below for nnaida11 and 13. nnaida13 showed a high level of low E noise on some spectra, but the pulser peaks were always well defined single peaks.</p> <p>nnaida12 showed noises across the full range of many spectra in all ASICs apart from ASIC4. Patrick suggested this module may possibly be suffering and need replacing. A quick scan through some channels showed:</p> <ul> <li>average peak width @ shaoing time of 0.5us of ~150-180 ch</li> <li>same at shaping times of 2.5 and 4.5us. Noise present over full range throughout</li> </ul> <p>My taxi was arriving so I didn't have chance to go through nnaida14 in depth, but a quick scan showed peak widths within ~10-15ch of those seen in nnaida13.</p></td> </tr> </tbody> </table> </p><p> </p> Encoding: HTML ELCode plain Suppress Email notification

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