ELOG CARME

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

CARME

Fields marked with * are required

Entry time:

Tue Jun 3 14:54:29 2025

Author*:

Subject*:

Run 48 started. Everything is running again. We started at 3E13 at/cm2

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.

All four detectors positioned fully out and stationary, however we switched off detector #4.

Left potentiometer = -3.03mm (corresponds to x = 0, which is the more trustworthy value)

Right potentiometer = 1.74 mm (corresponds to y = -500, which is the more trustworthy value)

Ring cycle time is 10 seconds.

Cooler set value = 297.2 V, 8 mA. Read value = 296.7 V, 7 mA

All leakage currents look good (except dssd4, currently turned off)

Beam position. Vertical =0.0mm , Horizontal=0.0 mm

Data rate ~ 108kB/s

&nbsp;

16:40&nbsp; Change Gasjet target Y=-500 to Y=0 
17:37&nbsp; Change Gasjet target Y= 0 to Y= 500 
 
20:30 We now take some time to optimize the areal density 
20:30&nbsp; Change Gasjet target Y= 500 to Y= 1000 (resulting in 2E12) 
20:32&nbsp; Change Gasjet target Y= 1000 to Y= 500 (resulting in 4E12) 
20:33&nbsp; Change Gasjet target Y= 500 to Y= 0 (resulting in 7E12) 
20:35&nbsp; Change Gasjet target Y= 0 to Y= -500 (resulting in 1.1E13) 
20:37&nbsp; Change Gasjet target Y= -500 to Y= -1000 (resulting in 1.8E13, still increasing and amazing for almost 1h) 
 
21:48: Since approximately 20min its just going down systematically from a stable 2E13 to 6E12...) Lets try another round of optimization... 
21:48&nbsp; Change Gasjet target Y= -1000 to Y= -1500 (starting at 7E12 and resulting in 2E12) 
21:49&nbsp; Change Gasjet target Y= -1500 to Y= -1000 (starting at 2E12 and resulting in 6E12) 
21:50&nbsp; Change Gasjet target Y= -1000 to Y= -500 (starting at 6E12 and resulting in 9E12) 
21:51&nbsp; Change Gasjet target Y= -500 to Y= 0 (starting at 9E12 and resulting in 1.3E13 but dropping back to 7E12 within 3min)

21:54&nbsp; Change Gasjet target. Leaving Y at 0, but moving X from 0 to -500 (starting at 6E12 and resulting in 3E12) 
21:55&nbsp; Change Gasjet target. Leaving Y at 0, but moving X from -500 to 0 (starting at 3E12 and resulting in 4E12) 
21:56&nbsp; Change Gasjet target. Leaving Y at 0, but moving X from 0 to +500 (starting at 4E12 and resulting in 6E12)

21:59&nbsp; Change Gasjet target. Leaving X at 500, but moving Y from 0 to +500 (starting at 5E12 and resulting in 7E11...) 
22:00&nbsp; Change Gasjet target. Leaving X at 500, but moving Y from +500 to 0 (starting at 7E11 and resulting in 2E12) 
 
Side comment: It seems no matter what we do, that there is a general decrease within the last 30min...

22:00&nbsp; Change Gasjet target. Leaving X at 500, but moving Y from +500 to 0 (starting at 7E11 and resulting in 2E12) 
 
Okay... No matter what we do... Its still decreasing... 
 
22:03&nbsp; Change Gasjet target. Leaving Y at 0, but moving X from 500&nbsp; to 0 (starting at 1E12 and resulting in 2E12) 
22:06&nbsp; Change Gasjet target. Leaving X at 0, but moving Y = 0 from&nbsp; to -500 (starting at 2E12 and resulting in 5E12 
22:09&nbsp; Change Gasjet target. Leaving X at 0, but moving Y = -500 from&nbsp; to -1000 (starting at 5E12 and just randomly fluctuating within the next 15min... and more decreasing than increasing...) 
 
22:25&nbsp; Change Gasjet target. Leaving X at 0, but moving Y = -1000 from&nbsp; to -1500 (starting at 1E12 and resulting in 2E12... ) 
22:31&nbsp; Change Gasjet target. Leaving X at 0, but moving Y = -1500 from&nbsp; to -2000 (starting at 1E12 and resulting in 8E11... ) Whaaaat???? 
22:32&nbsp; Change Gasjet target. Leaving X at 0, but moving Y = -2000 from&nbsp; to -1000 (starting at 9E11 and resulting in 4E12... ) Okaaaay lets wait and see...

01:00

Run stopped.

Final statistics very high. Over 10,000 counts for 3He and 3H, Over 5000 counts for proton.

Final energy histogram and xy plot on final attachments

Encoding: HTML ELCode plain
Suppress Email notification Resubmit as new entry

Attachment 1: