 Sun Feb 27 00:07:15 2022, David, Pierre-Michell, No beam, valve closed
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At 00:37 we lost the beam due to a high pressure burst in the tarjet which resulted in a valve closed at YR09VV...
On-call service technicians are coming to solve the problem.
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Mon Feb 28 14:38:15 2022, TD, NewMerger statistics 37x
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Screenshots of all NewMerger statistics |
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Thu Feb 1 14:45:09 2024, JM, CB, NewMerger setup
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To include alll 16 FEE modules in the NewMerger we edited the file /MIDAS/DB/EXPERIMENTS/MERGE/Options/carme-gsi from MERGE.LinksAvailable string 5 to
MERGE.LinksAvailable string 15
We also edited the file /MIDAS/Linux/startup/NewMerger from ./master64 -i 8 -l 16 -p 11001 & to ./master64 -i 16 -l 16 -p 11001 |
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Fri Jun 14 19:59:14 2024, US, LC, CB, New run with name of 72 is started due to target issue
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21:00
Target is lost. Background run is being collected.
New run 72 - beam on target with definite target overlap [coasting] |
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Tue Mar 1 16:57:34 2022, CB, LV, PMH, New run
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Beam issues due to too long storage time in the last hours. Motors moved out and not moving.
Decreased storage time to 70 s. Seems OK now. Restarted motor movement as before
Started new run R86 |
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Mon Nov 8 17:19:02 2021, RSS + OG, Neg and ion cables connected
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Neg and ion pump cables were labeled and connected.
Kapton tape wrapped around the neg cable connectors for the strain support.
Lower frame mounted. |
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Wed Oct 6 15:36:14 2021, CB RSS, Neg activation tests -3
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Attempted to activate 2xUHV1400 connected to bottom C4, channel #2 using P 200 W, t rise 30 min, t hold 90 min.
Temperature of Kapton bundle increased drastically to 160+ C. Had to stop. Conclusion is that these are likely
the two UHV1400 on the bottom of CARME, immediately in front of the Kapton bundle.
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Wed Oct 6 09:47:30 2021, CB RSS, Neg activation tests -2
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Attempted activating 2xUHV1400 connected to top C4, channel #3 with P 300 W (450 C?), t rise 30 min, t hold 90
min as yesterday
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Wed Aug 19 16:44:39 2020, JM, Neg Installs
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| Internal neg installs completed and electrically checked. |
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Wed Sep 9 21:01:48 2020, JM, Neg Feedthroughs
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4/6 of the neg feedthroughs installed. Continuity between the power pins, ground pin and the chamber has been checked, we observe 5-10 ohms between
the power pins similar to previous checks on the heaters. Also attached are the crimps for the ground tag and feedthrough connector pins. |
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Mon Oct 19 13:57:52 2020, JM, Neg Activation
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Neg and Neg-Ion pumps have been connected up to the control modules. Controller on the right is connected to the D-2000s. Middle controller is connected
to the wall section negs (1x2negs in series and 1x3negs in series) and the moving detector negs (2x2 negs in series). Left controller is connected
to the intermediate section negs (2x2 negs in series). Must connect IN/OUT interface on the back of the controller or the alarm for an open circuit is |
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Wed Mar 22 16:33:32 2023, TD, NIM WR source 8x
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Test of NIM WR source at Edinburgh
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Mon Oct 18 16:25:11 2021, JM RSS TD, NEG rotation + cable removals
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Kapton cabling and the broken ceramic detector holder have been separated. Required holding jacking plate in a vice and using lots of propanol to wet
the jacking screw. A long set of kapton cabling has been removed from the other side of the chamber which can be used when mounting the detectors. The
feedthrough flange was re-mounted on that side with no kapton cabling. |
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Wed Aug 30 09:33:13 2023, CB, OG, NEG cables repaired
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Repaired Neg wires for D2000 with Oemer's help.
Cable #2 is fine.
In Cable #4, wires 1 and 2 are swapped but it's impossible this happened when the connector came apart. The pins are crimped and secured |
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Tue Oct 5 17:30:01 2021, CB RSS, NEG activation tests
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Found D2000 #1 activated and at 250C (25W)
to prevent getting dirty when other NEGs
are activated. See previous entries.
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Mon Nov 22 08:06:01 2021, RSS CB + ML, NEG activation starts
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08:20 Temperature of channels 1-3 and 5-6 were reduced to 120 degrees. Immediately after, the conditioning of the NEGs was stopped and D2000s ion pumps
were flashed 5 times. The temperature of the gas jet target and the electron target channels was reduced to 120 degrees.
11:00 Started activation of D2000 following procedure in ... at T=400 C for trise 30 min + thold 90 minute. After activation, NEG elements are |
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Tue Nov 23 08:49:33 2021, CB + ML, NEG activation completed
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Found temperatures and pressure stabilised overnight. See attached.
12:00 Began activation of 3x UHV1400 in channel 2, top module. Started using 90 W as per procedure. No effect on temperature. Increased to 120
W. OK |
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Tue Oct 17 08:43:47 2023, CB, NEG activation -2
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09:40 - Found temperature and pressure stablised, but too high to comfortably activate NEGs closest to detectors. Detector temperature around 90C. This
was expected. Ramped down UHV1400 #1,2,3,4 to P=50W (200C?). Ramped down heaters to 100, 80, 100C. Ramped down heating jacket to 60C.
10:00 - Activated set #5 (x2) at 80W tramp=30, thold=infinity; set#6 (x3) at 120W rest as #5. This is different from previous procedure because |
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Mon Oct 16 08:28:02 2023, CB, NEG activation -1
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9:00 - Michael's online vacuum pressure plot is no longer working - an old image is being displayed. CARME temperatures around 80-85C. Lowered heater
temperatures to 150, 100, 150 C for safety. Lowered jacket temperature to 80C
9:15 - Flashed ion pumps several times. Small pressure increase, up to ~7E-9 but not macroscopic |
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Fri Sep 1 08:11:40 2023, CB, NEG activation - 2
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9:10 Set heaters temperature 300 -> 250 C in preparation for cooling down and to help keep DSSD temperature down. Started activating set 6 (3 X DSSD)
at 120 W as per previous procedure.
9:15 Realised previous choice is a mistake in the current configuration as the DSSD TC is closer to set 5. Set 6 off. Set 5 to 60W. No effects |