AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Sat Mar 29 12:26:48 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>08/02/16</p> <p>Spoke to PJC-S -> Ethernet cables from FEEs to switch are all 4m Cat6.</p> <p>System powered on with bias to detector of +200V and leakage current of 6.4uA at room temp 19.0oC.</p> <p>Double peaking present again in nnaida11/12 -> individual peaks @ ~100ch FWHM with separation ~150ch @ 2us shaping time.</p> <p>Double peaking also present in nnaida13/14 -> indiv peaks ~100ch FWHM and separation ~90ch.</p> <p>Changing grounding had no effect.</p> <p>Made ribbon cable with 2 separately shielded halves plus connecting Cu tape strip at FEE and + drain wire in contact with both halves - single peaks - widths of ~110-160ch.</p> <p> </p> <p>09/02/16</p> <p>Added conductive gasket to Cu mount blocks</p> <p> - resistance between Cu and gasket ~0.2 Ohms (probe-to-probe = 0.16 Ohms)</p> <p> - LEMO connector to Cu mount block ~0.35 Ohms</p> <p> - LEMO to LEMO (between adapter PCBs) ~0.55 Ohms (connected by heavy duty Cu braid)</p> <p>Powered system on. Bias of +200V and leakage current = 5.5uA @ room temp 19.5oC.</p> <p>With gasket added and heavy duty Cu braid between mount blocks, pulser FWHM in nnaida11 ~ 62ch and in nnaida13 ~72ch at shaping time of 8us.</p> <p>Investigated effect of shaping time on peak FWHM (avg width found from average of 1.(6,8,10,12).L for each FEE. (see attachments)</p> <p> Shaping time (us) | nnaida11 | nnaida12 | nnaida13 | nnaida14 </p> <p> 0.5 | 95* | 108* | 126* | 99*</p> <p> 1.0 | 82 | 116** | 130^ | 110** </p> <p> 2.0 | 68 | 83^ | 110^ | 92^</p> <p> 4.0 | 60 | 77 | 85' | 90</p> <p> 8.0 | 56 | 63 | 77 | 64</p> <p> * = all peaks single and Gaussian looking</p> <p> ** = not all peaks Gaussian, some flat or sloped top </p> <p> ^ = double peaks, widths estimated from tallest peak</p> <p> ' = flat topped</p></td> </tr> </tbody> </table> </p><p> </p>
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