Friedhelm Ames wrote:

mass spectrum saved as plotdump-local-clean.txt_Jun29_12_14-55-43.txt

 new parameters for mass scan program after fit of mass scan

CONST11 = -4.13

CONST22 = 0.09595

A big vacuum excursion tripped the source off at about 1am. The vacuum did not fully recover afterwards only down to about 1.3e-6T. Ne leak has been closed and vacuum went down to 6e-7T within a few minutes. After the trip the current of the magnet stayed constant. Fluctuations may have been caused by high voltage sparks.

heater ramping up again with Ne leak closed.

turbo pump TSG:TP1B has tripped off. Cannot be restarted. Fault report to vacuum. Everything switched off again

Restarted the PC at the Test Stand.

Restarted the Archivers; currently pumping down the separator area.

see e-fault 6142

Waiting Rick for the fitting on the vacuum pump.

Gas line vacuum pump reinstalled after fitting was modified to receive a standard swagelok connector. The vacuum line was plumbed using 1/4" copper tube (not Stainless) for the the ability to flex and manipulate the line for pump removal and and insertion.

1524H Start small pump.

1529H stop the pump.

Test high voltage to 30 kV ok

Test gas valve open at 6.1 V

Test Ne leak ok

Will run test from home.

The ramp up finished.

I have 3.35E-6 Amp out of the source on FC0.

Vacuum  4.3 E-7 T increase Coil current to 40 A. No effect on vac.

Increase coil to 50 A. Vacuum still good.

I will continue from home..

start high voltage and heaters

Did the HV conditioning up to 30kV.

Started the heaters conditioning:

for TSH:TGHT up to 580A

for TSH:TBHT up to 230A

Did the HV conditioning for the TiC#3 up to 30kV.

Heaters ramp up in progress.

The TSH:TGHT stopped at 263.7A, but the setpoint is still ramping (now at 421A). The voltage is set correctly: have 6.238V setpoint and 4.386V readback. The reading on the Power Supply shows 418A. Through the window the target assembly looks at high temperature. The readback on Epics seems stuck. E-Fault for Controls 6389

Mass scan file: plotdump-local-clean.txt Nov2 12 13-15-59.txt

The scan was taken at TGHT=573A (read from the PS panel) .

The TBHT = 230A

Prepared the Test Stand for Controls to investigate E-Fault#6389.

Evgeniy increased the current limit on the power supply TSH:TGHT from 2 rotations to 7 rotations, after talking to Ray Dube.

I turned on the HV at 30kV and started the Auto-ramping.

Evgeniy and Kazuya investigated the problem with TSH:TGHT readbacks and they came to the conclusion that the PS is faulty, and the PLC reads correctly the signal sent by the PS.  Kazuya is redirecting the E-Fault from Controls to PS.

Ray Dube estimated few weeks (4-6) to send the PS offsite for repairs. This needs to be scheduled. For the time being, one can use the Test Stand with the PS setpoints, displayed on its front panel, as a reference.