Today the module was biased to 40kV in the conditioning station. The current draw was 0uA. Sparking started at 27 kV. I have attached the recording from the strip tool of the vacuum while we were testing. After consulting Pierre if we should take the module to a higher voltage it was decided not to. The purpose of this test we to check the interaction between the module, cover, new cooling line, EE and EINZEL cables. This test was considered a success and although there are no anticipated problems care should be taken when taking the module past 40kV for the first time.

 Hello Ray and Yi

Completed a HV test with the water flowing today.

8.96 Mohm

56.4 PSI across the load

16.5 GPM through the loads

some sparking occurred see attached file.

module was biased with all items tied to common to 40kV. Leakage current was less than 100uA.

This was a very successful test.

 Today while putting the cover on the cord that goes to the controller was bumped. This bent the connector down and caused a vacuum leak. I tried to tighten the bolts in the hope the leak would go away but it did not and I sheared one of the bolts off. David is inquiring with Edi if the pump can be repaired or if it needs to be replaced. The good news is that the interlocks work exactly as planned. Upon detecting a leak they shut the turbos down and closed all of the valves they even beat the turbo controllers for overload.

David believes we can rotate the pump slightly to avoid this problem in the future. Hopefully repairs can start on Monday. 

The conditioning station will be shut down for the weekend.

TM#4 with CS Test Target #1 (dummy target) moved from the conditioning station to the east target station. Move went well.

Bevan and I replaced TM4 TP1 today at conditioning station .The pump will be started this week when I do ITE and TM4 leak check .

 Dave Morris and I investigated the Faraday Cup today. It was found to be plumed in the wrong direction (fails in). This is not an issue for the conditioning station as there is nothing down stream from the cup. Dave will change the controls to reflect this.

 TM4 with CS Test Target #1 was moved from the SHC to the Conditioning Station. All went well. The welding cables came a little close to the cage, David will bend them in more in the future.

 Roughing pumps were turned on at 15:23 13/03/2013.

 The cooling package was started at 10:00 today. See attached picture. There is another snap shot at 10:03.

 Turbos started at 11:14. TP1S achieved full speed in less than 2 minutes. TP1 and 2 tripped at 9 minutes. Restarted and reached at speed after another 1 minute 20 seconds.

Bevan Moss wrote:

The cooling package was started at 10:00 today. See attached picture. There is another snap shot at 10:03.

 The conductivity of the cooling package is above 5Mohm which is the minimum limit for the PS. This was achieved at 11:55. See attached picture.

 Over the weekend Turbo pump one failed. It was attempted to restart the turbo in soft start but that also failed. Although the Vacuum was good enough to operate both Turbos are required to pass commissioning. As such the pumps were turned off at ~10:00 today. Venting started at 12:00.

The Model of the Power Supply (PS) is TSQLG 480-20/1500 and serial number is 2755.02.01.01.09.

We went to test the PS and supplied the required 480V and turned the local switch to on. At this point nothing happened, the controls screen didn’t light up nothing. We tried to run the PS in remote mode as that is what it had previously been set at and again there was no response. At this point I called the electrician the check that we were in fact supplying 480V. He checked all the way to the contactor inside of the PS (see attached picture). He also checked the 3 larger fuses and 6 smaller ones, they have not failed.

I have inquired with Jens Lassen who is more familiar with these PS and he has not had this issue before. He is going to have another look at the PS with the electrician specifically checking the 24VDC for the control board. Any further information or checks you could provide would be very helpful.

 This PS is needed for commissioning of a system and unfortunately this failure has come at a very in opportune time.  Although the PS is show to be several years old we have not actually used it aside from some minor tests ie does it turn on (it has previously).  I have phoned the manufacture to determine what else can be check and what the next steps are. Werner requested that I send an email (completed) so he could give it to their engineers.

 The conditioning station has been vented with argon. Time taken is not known but it is less than 3 hours. See attached picture for convectron gauge readings. CG1A is in air.

 David replaced the broken turbo pump this morning and I have started roughing at 9:54.

 Turbo Pumps have been started and are in normal operation. TP1 which has recently been replaced was started in soft start and had no issues. TP2 was started normally and tripped prior to reaching speed. It was left for a while and restarted. When restarted it was still at 17KRPM, it reached normal operation.

I leak checked new installed TM4 TP1 at conditioning station. The CS vacuum gauges reading were at 1.0-1.5xE-6 torr . Leak detector base leak rate 0.0xe-9atm.cc/sec, base pressure 0.0xe-4torr. I sprayed helium around the pump  inlet flange and KF 25 pump outlet flange to pump joint. There is no response on leak detector. The new installed TP1 is leak tight.

Today, the commissioning of the TCS went well. The water/vacuum interlocks were checked OK. Then, the TCS was HV conditioned up to 33kV.

Tomorrow, the heaters will be ramped up.

After few hickups the TCS was successfuly commissioned.

In the morning, in the middle of the heaters conditioning: 360A/250A for the TGHT/TBHT, the target heater PS tripped and it didn't recover immediately.  I cannot tell if the card is still OK. Before this even, there were few bias current sparks created when the ionized tube was raised above 250A; this also tripped the Einzel lens. Re-started the Heaters, and did the conditioning with the rest (HV, Optics) Off. After the heaters were at nominal values, raised the rest: HV to 30kV and the Optics. And everything held fine. The current on the FC was 3micro-Amperes. The water temperature levels stayed below 25 deg Celsius.

The problems that need to be fixed:

1. The biggest problem was created by the target power supply: the new card is not calibrated, the voltage is not regulating, but the main problem is the grounding of the output of power supply. Friedhelm measured 0.2V across the return and the cage (200mili-ohms resistance) .  This was probably overlooked.

2. The Auto-ramping routine didn't work. Controls would need to fix this.

3. The RGA didn't want to connect from the account Don created for me. So, we have only a RGA scan taken on Friday by Don, when the target was cold.

 The cooling package and vacuum was stopped today at 9:26 so the module can be move.