AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
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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>Noise seemed less strong today, unsure of cause. I had re-taped snout as tape was not sticking well.</p> <p>Figures 1-4: Waves for all 4 FEEs connected to the DSSD<br /> Figures 5-8: Zoomed in on region 400-600<br /> Figures 9-10: Rates in DSSD</p> <p>Note in particular fee09 has a clear noise pickup somewhere. Also appears when no DSSD voltage.<br /> Peak distance = 6 channels = 16.6 MHz.</p> <p>Fee09 is connected to HV bias core (-160 V)<br /> However unplugging the HV cable from it shows no difference.</p> <p>Must be related to something else.</p> <p>Update 16:29 CEST:<br /> Distance is more like 5 channels (20 MHz)<br /> Fee09 picks it by far most strongly but all fees you can make it out<br /> Additionally can see a slower waveform especially on other fees... approximately 40 channels = 2.5 MHz</p> <p>Checked with multimeter that low resistance path between FEE cooling plate and ground LEMO connector<br /> also low resistance between ribbon cable copper shield and ground LEMO connector.</p> <p>Noise seems to appear even if pulser cable unplugged at pulser end or when attentuation is increased weaking pulse.</p> <p> </p></td> </tr> </tbody> </table> </p><p> </p>
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