AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Fri Mar 28 20:47:38 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>Assembled three more of the filter boards and installed them in the AIDA PSU with the first, wired to use the switchmode power supply.</p> <p>Powered up nnaida14 first and went fine. Just the boot sequence and measure the voltages for stability.</p> <p>Powered up the remainder and all was well.</p> <p>Setup and go..... the rates were way too high in all of them.</p> <p>nnaida12 was running at 200k/sec+ most of the time. </p> <p>The other three could be reduced in rate by changing the slow comp thresh as would be expected but 12 wasn't any good.</p> <p>Tried:</p> <p>Remove MACB HDMI.... no good</p> <p>isolate psu earth from NIM crate ( put psu on foam support ) ..... no good</p> <p>Checked the filter output and the sine wave reported yesterday ( nnaida2 ) was present on all voltage rails but no evidence of high frequency noise.</p> <p>Set all channels to 1GeV, with Slow comp thresh of 10, and 11,13 & 14 showed roughly the same rate of 10 to 15k/sec. Peaks in the spectra were FWHM 12 at a random sample. nnaida12 would not conform.</p> <p>Changed back to the bench power supply connections so Chris can continue.</p></td> </tr> </tbody> </table> </p><p> </p>
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