SMP  vacuum pumping down is stopped. SMP and TM4 venting to atmosphere will be started soon.

 TM4 with target TiC#5 installed has been leak checked and electric checked on NHC.

 TM4 was connected in ITE.  pics attached FYI.

Yesterday and today module conditioning was done on Tm4 in ITE. This is the first ramp up after the shutdown and ITE is planned to run at high voltages for the first weeks. The module is behaving well - went up to 40kV yesterday, stayed there for an hour, and up to 46kV today. Current draw is 113uA at 46kV. No serious sparking.

Tuesday, May 23, 2023, 09:32 :  Ramping up again, easy to 45kV. Drawing 132uA at 49kV. Still behaving quite well.

When I tried to raise the anode voltage in cathode bias mode on May 23 evening, I found the target or tube shorted to HV common. Investigations in the faraday cage today showed the same. I removed all the new electronics (resistors, gemovs, etc) from the power supply to no effect, so I disconnected the TGHT supply and pushed it away from the busbars. There was still a short. David Frank and I then went down to the pit and disconnected everything to measure the module. The module itself showed no short, and the bus bars in the chase for TGHT showed no short, though the ones for TBHT still showed the short.

David and Frank reconnected the module and I disconnected the TBHT supply in the faraday cage, then I found no shorts to TGHT/TBHT. When I reconnected everything there were still no shorts. There must have been a short in the TBHT line in the faraday cage, and another short in the TGHT line in either the faraday cage or on the module top. Both these shorts got resolved by taking everything apart. Still not sure how it happened.

Next I found I could not raise the anode voltage above 230V, it looked like it was current limiting but since the current limit was high, I figured it had something to do with the new electronics installed. I disconnected them all the in cage and that solved the problem, and then reconnecting the gemovs that go from the PSU terminals to HV common caused the problem again, so I left those disconnected.

argon is being supplied at 6 psi to TM4. 

 TM4 with TiC#5 was disconnected in ITE and moved to NHC.

 TM4 with spent target TiC#5 electric check after moving from ITE to NHC.

 TM4 with new target SiC#45 installed has been leak checked and electrical checked on top of NHC.

 TM4 with new target SiC#45 was connected in ITE, all TPs are running at their full speed.

ITE water signal interlock check including HS,EE, TA, TU, MSP. Coil1 , C-window ,2a-window, 2A tank, 2A shielding plug , 2A dump, 2A collimator  are done. All things work.

 TM4 with spent target SiC#45 was disconnected ITE  and an electrical check made right after moved on NHC. 

 TM4 with new target UCx#42 was connected in ITE. 

 An electrical check was made after new target installed on TM4.

 TM4 with spent target UCx#42 was disconnected in ITE and has been remote moved to NHC this morning.

  TM4 with spent target UCx#42 has been electric checked at NHCpost right after transferred from ITE.

 TM4 with new target Ta#65 has been E/L checked at NHCPost.

 TM4 with new target Ta#65 has been E/L checked at NHCPost.

 TM4 was connected in ITE with new target Ta#65 installed. see attachment in detail.

TM4 with spent target Ta#65 was electrical checked right after being moved to SHC.