 Thursday, March 29, 2018, 10:58, Carla Babcock, , , , , , , , 6x
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Started with Anode at 25V and coil at 0A, bias at 30kV. (attachment 1)
Ramped coil to 60A (0.4V) (attachment 2)
Ramped bias to 51kV, but then TP6 turned off and there was a momentary 0.2A decrease in the TGHT current. No spike in BIAS current seen, maybe |
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Friday, April 20, 2018, 13:20, Carla Babcock, , , , , , , Done, BIAS* fan sounds like it is dying
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The fan in the EZL power supply is making a terrible noise - keep an eye on it, it sounds like it might give up soon.
Monday, April 23, 2018, 10:47: The back panel was opened. Original entry stated EZL power supply issue. Corrected to BIAS PS. High voltage
group notified. Fan replacement required. |
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Friday, June 07, 2019, 16:56, Carla Babcock, , , , , , , , TM4 source tray state
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TM4 source tray left in test stand over weekend, just the rouging pumps on. Ready to be removed Monday morning.
Monday, June 10, 2019, 06:35: Venting - Aaron S. |
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Wednesday, June 26, 2019, 14:41, Carla Babcock, none, , , , , , Problems/Solutions, Issues with test stand wiring in service cap area
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The wiring on the top of the test stand was burned, see entry 737.
Probable cause of this is as follows:
Coil lines are connected by a wire to HV common, the 9-pin feedthrough etc to maintain same voltage on all the insulator tops. This is also directly |
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Tuesday, December 01, 2020, 11:56, Carla Babcock, , , , , , , In progress, Modifications to test stand for TM3 tests
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Tuesday, December 01, 2020, 11:56 :
TSG:BIAS unplugged and controls pigtail (made by Ray) added in order to connect controls cable to TCS:BIAS, which is now installed in the same
rack. |
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Tuesday, December 01, 2020, 17:04, Carla Babcock, , , , , , , Problems/Solutions, Found another burned jumper cable
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Between feedthroughs F (magnet coil) and B (tube heater negative), I found a jumper with two resistors that has been burned up. I am not sure when this
happened, but it would be good to review the overall setup of the service cap wiring in the new year.
The cable connected to feedthrough Q where the multipin sits also looks burned. |
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Wednesday, December 02, 2020, 08:32, Carla Babcock, , , , , , , , Modifications to test stand for TM3 tests
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Wednesday, December 02, 2020, 08:31 :
Added copper wire connection to multipin screw terminals in HV cage to make sure they are grounded.
Attached grounding rod to back of HV cage. Not ideal, but couldn't find a better place without making a extension to the cable. Will see what John |
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Friday, December 04, 2020, 08:53, Carla Babcock, , , , , , , , Modifications to test stand for TM3 tests
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Friday, December 04, 2020, 08:52 :
Test stand roughed down to 29mT overnight. Started turbos for testing later. |
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Tuesday, December 08, 2020, 11:54, Carla Babcock, , , , , , , , Modifications to test stand for TM3 tests
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The copper tubes to be used in the TM3 test piece may have flux inside them from soldering the end caps on. There are holes along the length for outgassing,
and we will try to bake them out in the test stand before installing them. There is still a dummy bake out target installed there, see the photo for how
the tubes are loaded in. TGHT ramping started around 3pm. |
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Monday, January 11, 2021, 14:20, Carla Babcock, , , , , , , , Test stand wiring reverted to anode bias mode
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I have rewired the test stand (service cap wiring only, not power supply wiring) to anode bias mode as shown in the diagram. This was not how it was
wired before, there are several things I have removed that appear to be newer additions. I also removed the burned cable between TBHT(-) and COIL(-), and
between the multipin feedthrough and ground (probably related to the other burned cable). |
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Wednesday, March 10, 2021, 11:10, Carla Babcock, , , , , , , , Venting for installation of emittance meters
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| Wednesday, March 10, 2021, 10:48 : Venting beamline section only for installation of emittance meters. |
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Monday, March 15, 2021, 16:10, Carla Babcock, , , , , , , , TISA emittance meter testing with new FEBIAD source
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Monday, March 15, 2021, 16:09 Target and ion source ramped to 400A/330A this afternoon
Monday, March 15, 2021, 18:53 : Tune through to final RPMs but not optimized. 5e-8 on FC0. Will turn down target and ion source values to TGHT/TBHT
350/250 until tomorrow. BIAS/EZL/COIL/ANODE all off. |
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Friday, March 26, 2021, 17:04, Carla Babcock, , , , , , , , Beam line vented for emittance meter exchange
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| Vented beamline and removed ARIEL emittance meter. In the process of swapping components, beamline left vented until Monday when we will finish the job. |
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Tuesday, March 30, 2021, 13:19, Carla Babcock, , , , , , , , Second emittance meter testing
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Emittance meter number 2 ready for beam shortly - installed and pumping down.
No beam found by Thursday evening, but beam seems to be coming out much differently than last time. Will check on emittance meter functionality
and try to re-tune later. |
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Sunday, April 04, 2021, 14:16, Carla Babcock, , , , , , , , Water leak problem persists
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IG1 has been spiking randomly, causing everything to turn off. Looks like the water leak is still there.
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Friday, July 30, 2021, 15:34, Carla Babcock, , , , , , , Failed, TSG:RP1 failure
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TP1A tripped off on Fernando, seems the backing pressure got too high. Even with PV1 closed the RP1 pump could not get below 200mTorr. Derek from vacuum
group came and had a look, and is swapping RP1 out for one of the vacuum group pumps, then will see if they can repair ours. |
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Wednesday, January 05, 2022, 15:12, Carla Babcock, , , , , , , , Modifications to test stand for mass marker tests
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Connection of TBHT negative to HV common removed (R4 in circuit diagram). Labelled and put in MRO bucket.
Anode connection moved to feedthrough J.
Rewired multipin patch panel. Left some grounded (HVC) wires hanging, should probably make this nice later. |
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Wednesday, January 12, 2022, 16:12, Carla Babcock, , , , , , , , Ramp up of the mass marker target
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Wednesday, January 12, 2022, 16:08 : HV ramped to 30kV, EZL=15kV, EE=-1.5kV
Ramping up to 250A on TGHT, 200A on TBHT. See MassMarkerTest#1
for ramp up values of the thermocouples. |
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Monday, March 21, 2022, 13:59, Carla Babcock, , , , , , , , 3rd mass marker test
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3rd version of the mass marker target has been installed. This one is further back on the heat shield, and has a longer ceramic piece attached. There
are three thermocouples as follows:
Thermocouple
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Monday, April 04, 2022, 20:44, Carla Babcock, , , , , , , , Change from 9-pin connectors to 5-pin connectors
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Swapped the old 9pin connectors out and replaced with 2 5-pin connectors, same as on the modules.
See attached for current pin out diagram. Many of the wires are too short to reach the bottom sockets, so wires 2, 8, 9 are not connected in the
connector. 4 spots are empty on connector 2 (right). (6, 7) and (4, 5) are twisted pairs. Unused wires are tapped up out of the way, but we should |
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