Wiring which was changed to run the mass marker tests has been reverted:

• anode bias cable connected to "B"
• tube negative attached to HV common through "B" to "F" connection

Ready for cathode biased FEBIAD operation.

Overview over the connections of the new 9Pin connector inside the vacuum and in the HV cage

1&2 : RFQ rods in the vacuum, RFQ Driver in HV cage

4: Repeller electrode, grounded in HV cage

5: Exit electrode , grounded in HV cage

6&7: thermocouple at the center block, w/o HV to OMEGA thermocouple display, with HV should be connected to GND with 1k-10kOhm (to allow a shift of the target)

8&9: not connected, grounded in HV cage

View on top of the feedthrough and the connector on the source tray (male connectors)

     __________________

    \    1     2      3      4      5   /

      \     6      7     8      9    /

          ----------------------  

1to1 connection for pins 1,2,4-9

Pin 3 is NOT CONNECTED

The pin pairs 1&2, 4&5, 6&7, 8&9 each use a line of twisted pairs

Found some water tripping in front of the high voltage power supplies rack from the water lines at the ceiling. Plastic sheets have been put on top of the racks and MCR has been informed.

Friedhelm Ames wrote:

turbo pumps stopped to prepare for venting for anode short investigation.

 Wednesday, July 04, 2012, 13:07: Water lines purged

water cooling line valves opened. No response on vacuum TSG:IG1 3.5e-7 T

venting and inspect the target

Wednesday, December 19, 2012, 09:43: vqacuum at 1.9E-7T, stop turbos

turbo pumps shut off due to work on cooling water system

vacuum and optics at teststand switched off to allow work on the water cooling system.

turbopumps in mass separator section started after power outages

turbo pumps stopped to prepare for venting for anode short investigation.

All turbo pumps have been restarted after cooling water is back and running.

Both turbo pumps at the source box cannot be started. A fault report has been issued.

Wednesday, September 14, 2011, 15:33

blah blah blah...

see e-fault 6142

Test stand vented

 Tuesday, May 15, 2012, 10:13: Turbo pumps at speed. Vacuum at 1.4E-5.

Tuesday, May 15, 2012, 12:03: Cooling lines opened. Vacuum stable at 1.6E-6

Tuesday, May 15, 2012, 12:17: Target ready to be heated and biased.

Tuesday, December 18, 2012, ~ 13:00 start ramping the TGHT current, vacuum at 1.7E-7T

Tuesday, December 18, 2012, 15:56: @ 250A, target is glowing, center block is cooler (can be inspected with a new hole in the heatshield lid), thermocouple is reading 224C, which is definitely colder than the temp from visual insepection, reading may be corrupted from contact to Heatschield

Tuesday, December 18, 2012, 23:11: target at 600A(593A/7.35V Panel reading), vacuum was up to 1.7E-6T, now 1.34E-6T. temperature reading was 405C which is quite away from glowing. Nevertheless, the center block of the target is visibly colder than the legs, while the center support is still way colder then the block. Thermocouple readback removed from HV cage. since the is a short cut the target (thermocouple?) the RFQ can be biased to 18V for suppression. everything locked up and stat HV test.

Wednesday, December 19, 2012, 00:14: target at 600A(593A/7.35V Panel reading), vacuum at 8.5E-7T, first HV test done, up to 30kV some occasional sparks. RFQ (1MHz , 40Vpp) without bias--> no signal, RFQ -9V biased --> 1.5E-11 on TMS:FC0

Wednesday, December 19, 2012, 01:17 : vacuum at7.7E-7T, start cooling down, was ~ 2.5h at max current.