ELOG CARME

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

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Entry time:	Sat Nov 8 21:56:45 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>Run 48 started. Everything is running again. We started at 3E13 at/cm2</p> <p>D+ beam deuterium target. D+ beam energy is still 0.5 MeV/u. (beam calc calculation is 0.5143 MeV/u). See previous entry for beamcalc.</p> <p>All four detectors positioned fully out and stationary, however we switched off detector #4.</p> <p>Left potentiometer = -3.03mm (corresponds to x = 0, which is the more trustworthy value)</p> <p>Right potentiometer = 1.74 mm (corresponds to y = -500, which is the more trustworthy value)</p> <p>Ring cycle time is 10 seconds.</p> <p>Cooler set value = 297.2 V, 8 mA. Read value = 296.7 V, 7 mA</p> <p>All leakage currents look good (except dssd4, currently turned off)</p> <p>Beam position. Vertical =0.0mm , Horizontal=0.0 mm</p> <p>Data rate ~ 108kB/s</p> <p> </p> <p>16:40  Change Gasjet target Y=-500 to Y=0<br /> 17:37  Change Gasjet target Y= 0 to Y= 500<br /> <br /> <strong>20:30 We now take some time to optimize the areal density</strong><br /> 20:30  Change Gasjet target Y= 500 to Y= 1000 (resulting in 2E12)<br /> 20:32  Change Gasjet target Y= 1000 to Y= 500 (resulting in 4E12)<br /> 20:33  Change Gasjet target Y= 500 to Y= 0 (resulting in 7E12)<br /> 20:35  Change Gasjet target Y= 0 to Y= -500 (resulting in 1.1E13)<br /> 20:37  Change Gasjet target Y= -500 to Y= -1000 (resulting in 1.8E13, still increasing and amazing for almost 1h)<br /> <br /> <strong>21:48: Since approximately 20min its just going down systematically from a stable 2E13 to 6E12...) Lets try another round of optimization...</strong><br /> 21:48  Change Gasjet target Y= -1000 to Y= -1500 (starting at 7E12 and resulting in 2E12)<br /> 21:49  Change Gasjet target Y= -1500 to Y= -1000 (starting at 2E12 and resulting in 6E12)<br /> 21:50  Change Gasjet target Y= -1000 to Y= -500 (starting at 6E12 and resulting in 9E12)<br /> 21:51  Change Gasjet target Y= -500 to Y= 0 (starting at 9E12 and resulting in 1.3E13 but dropping back to 7E12 within 3min)</p> <p>21:54  Change Gasjet target. Leaving Y at 0, but moving X from 0 to -500 (starting at 6E12 and resulting in 3E12)<br /> 21:55  Change Gasjet target. Leaving Y at 0, but moving X from -500 to 0 (starting at 3E12 and resulting in 4E12)<br /> 21:56  Change Gasjet target. Leaving Y at 0, but moving X from 0 to +500 (starting at 4E12 and resulting in 6E12)</p> <p>21:59  Change Gasjet target. Leaving X at 500, but moving Y from 0 to +500 (starting at 5E12 and resulting in 7E11...)<br /> 22:00  Change Gasjet target. Leaving X at 500, but moving Y from +500 to 0 (starting at 7E11 and resulting in 2E12)<br /> <br /> <strong>Side comment:</strong> It seems no matter what we do, that there is a general decrease within the last 30min...</p> <p>22:00  Change Gasjet target. Leaving X at 500, but moving Y from +500 to 0 (starting at 7E11 and resulting in 2E12)<br /> <br /> <strong>Okay... No matter what we do... Its still decreasing...</strong><br /> <br /> 22:03  Change Gasjet target. Leaving Y at 0, but moving X from 500  to 0 (starting at 1E12 and resulting in 2E12)<br /> 22:06  Change Gasjet target. Leaving X at 0, but moving Y = 0 from  to -500 (starting at 2E12 and resulting in 5E12<br /> 22:09  Change Gasjet target. Leaving X at 0, but moving Y = -500 from  to -1000 (starting at 5E12 and just randomly fluctuating within the next 15min... and more decreasing than increasing...)<br /> <br /> 22:25  Change Gasjet target. Leaving X at 0, but moving Y = -1000 from  to -1500 (starting at 1E12 and resulting in 2E12... )<br /> 22:31  Change Gasjet target. Leaving X at 0, but moving Y = -1500 from  to -2000 (starting at 1E12 and resulting in 8E11... ) Whaaaat????<br /> 22:32  Change Gasjet target. Leaving X at 0, but moving Y = -2000 from  to -1000 (starting at 9E11 and resulting in 4E12... ) Okaaaay lets wait and see...</p> <p>01:00</p> <p>Run stopped.</p> <p>Final statistics very high. Over 10,000 counts for 3He and 3H, Over 5000 counts for proton.</p> <p>Final energy histogram and xy plot on final attachments</p></td> </tr> </tbody> </table> </p><p> </p> Encoding: HTML ELCode plain Suppress Email notification

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