 Thu Feb 15 21:07:00 2024, JM, AB, AR, OF, Run33 - cooled beam on target 22x
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22:27
Run 33 started cooled beam on target.
Detectors IN (left arm pot =36.5 mm, right arm pot = 70.49 mm) |
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Thu Oct 21 20:26:44 2021, JM TD, Thermocouple and Connector cables 10x
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NEG pump electrical connections tested - all connections sound.
Detector carriers have been redrilled and are currently being cleaned. Carriers were checked within the chamber, mounting much easier with new
hole. Distances to NEG feedthroughs and thermocouple feedthrough from the carrier also checked. NEG feedthroughs have sufficient separation now moved, |
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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 Sep 29 13:13:51 2021, JM RSS PB(remotely), Detector frame assembley
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29/9/21
We have opened the cleaned parts for assembley of the moving detector frames. We appear to have everything we require.
Standoffs - 12 M3x35 bolts, Many M3 washers, Many M3 nuts, 16 standoff tubes. |
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Fri Sep 17 16:42:25 2021, JM RSS ML + OG, CARME Realignment + Thermocouple installation 8x
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Laser surveying team worked till 11. Chamber was too high by 3mm close to the jet target and 6mm by the turbo pump (towards the dipole).
CARME lowered appropriate amount using bolts under CARME feet. Height checked using a laser on the centre point line of the middle flange turbo
end and mid point on the front of the chamber (see images). During lowering front foot swapped and valve supports moved slightly to give more clearance |
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Mon Sep 20 11:45:45 2021, JM RSS ML, CARME installations 6x
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Ion pump, RGA and additional gauge installed on the chamber.
Our gauge is the one mounted above the NEG feedthrough, Michael's gauge is mounted below the feedthrough. Ion pump too large to install on
the top of the vessel, sufficient room on flange immediately next to this top flange. |
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Wed Sep 22 14:44:51 2021, JM RSS ML, CARME leak test + bakeout tent
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On 21/9/21 CARME was connected to the leak tester. Leak testing showed no apparent leaks, extra time required to reach <1e-4 mbar during initial turbo
pumpdown might be due to outgassing from additional installed components on the chamber. Turbo pump restarted
21/9/21 16:28 9.73e-7 mbar |
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Thu Sep 23 13:31:12 2021, JM RSS ML, IE514 Gauge and Bakeout
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CARME setup checked by vaccum group this morning.
Both IE514 gauges de-gassed. To de-gas on the CM52 controller select the channel and hold the right arrow for two seconds. The reading will flash
indicating the de-gassing procedure, this lasts for 2 minutes before completing. Flashing automatically stops once procedure finishes. Attached for convinience |
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Fri Sep 24 08:47:36 2021, JM RSS CB(Remotely), Baking
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Baking halted on 23/9/21 16:16 as connection to TC08 module was lost. USB cable connection to TC08 module appears to have been damaged in shipment. USB
hub and cable replaced, connection re-established and baking restarted 17:27.
Ramping of baking limited to 40C by the maximum difference between parts of the chamber being too high, this safety feature prevents high thermal |
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Mon Sep 27 17:53:35 2021, JM RSS , Baking Jacket upgrade + NEG controllers connected
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Additional baking jacket sections for the turbo section arrived today. Baking was halted at ~11:00 to allow for the chamber to cool to install new sections.
New sections installed and baking restarted at 15:25. Jacket fits much better with gaps near the turbos and the motors now covered much better. Attached
are some photos. |
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Thu Sep 16 15:24:29 2021, JM RSS, CARME vented + thermocouple feedthrough
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Chamber has been vented back to atmosphere.
Motor was able to be pulled back to insert bloacking pin once at atmosphere.
Thermocouple feedthrough constructed with 4 thermocuples attached. Internal thermocouples each ~200mm in length with external thermocouples each |
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Mon Oct 4 09:19:11 2021, JM RSS, Activation of NEG elements
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9:30
Ion pumps de-gassed by switching on and off multiple times. Large pressure increase the first time pumps were flashed, pressure recovers quickly
once pumps off. Subsequent flashing of ion pumps showed a significantly smaller pressure increase, unitl little increase was seen. |
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Fri Sep 24 09:44:58 2021, JM ML, Vacuum gauge readout
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The analog readout of the Combivac controller for the IE514 ion gauge has been set up, readings are plotted to http://web-docs.gsi.de/~lestinsk/vacplot.php.
Readings and plot should be updated every minute. |
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Sun Feb 18 00:16:55 2024, JM CB, Run 40 - night shift 15x
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01:17
Run 40 continues.
Beam intensity looks OK. Oscillates between just below 2.5e7 and just below 3e7. (attachment 1) |
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Tue Aug 18 11:26:26 2020, JM, Week ending Friday 14/08/20
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Week ending friday 14/08/20
CARME chamber securely mounted upon aluminium frame and support skis. Neg-ion pumps and right angled flanges installed. Neg pumps installed in
the wall detector section of the chamber. Neg pumps continuity checked and are electically isolated from the chamber. |
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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 2 17:01:49 2020, JM, Bakeout started and valve installation
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Initial bakeout started which will run until friday, temperature had reached 44 degrees when I left the lab.
The bottom valve has now been installed on the main chamber |
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Fri Sep 4 15:48:25 2020, JM, Bakeout test completed
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Bakeout test completed. Maximum temperature reached within baking volume was 120 degrees, with baking stopped by the program due to detection of
negative temperature gradients. Negative temperature gradients due to a couple of thermocouples becoming unsecured and moving to cooler part of baking
volume. Attached documents show temperatures of thermocouples. The colour of plots are linked (all of chamber temperatures are blue etc). Temperature |
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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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Wed Sep 16 17:46:36 2020, JM, Pumping of Chamber
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A pump cart and leak cart have been connected to the chamber via the top turbo at the back of the chamber. An air line has also been connected to the
valve to open/close it. The pirani gaige has also been replaced by a blank flange, a gauge on the pump cart can measure the pressure in its range. The
turbo fan and controller were set up and pumping was started after lunch. |