The conditioning station was ramped down overnight and David ramped it back up this morning. Currently trying to get it to sit stable at something higher than 55kV.

Wednesday, June 12, 2019, 08:11 : Sitting at BIAS / EL = 53.9 / 28, 2 sparks to ground, one turned off TP2

Wednesday, June 12, 2019, 08:53 : Been at BIAS / EL = 56 / 28 for >10mins with no real sparks. Will continue up.

Wednesday, June 12, 2019, 08:54 : Spark to EL at 56.1

Wednesday, June 12, 2019, 09:34: Sitting at 55kV for 40 mins. 2 sparks to ground, 1 spark to the EL.

Wednesday, June 12, 2019, 09:49 : Leaving it at 56.6 for a while

Wednesday, June 12, 2019, 09:56 : Either there was a spark to IG1S or there is a vacuum limit that does not accept a 1.2e-6T spike. Everything turned off, but everything seems to still be working.

TM4 was removed from NHC to S_W silo yesterday.  The remove is smooth and successful.

 SMP:MP1 is started with SMP BV1 is opened. SMP is under vacuum for TM4 storage during shut down.

A complete TM3 electrical check at TCS under good vacuum has been done. Pin 14 to 60KV only has 8K ohm on ohmmeter check , and it's about 2Kohm @250V Megga. It's low in resistivity. The pin 14 is for thermocouples only so no big concern.  The rest things are good. See attachments.

Tm3 has been moved  from TCS to silo. The move is successful.

 After discussion with Friedhelm it was decided to continue trying to condition the module today before moving it tomorrow. The voltage was quickly raised until 40 kV where it was left for ~30 minutes. Sparking was minimal. It was then slowly raised to 44.3 kV it held this voltage for ~8 minutes when the current started to climb (remained below 200uA as set as a limit in previous tesing). There was also sparking at this point. This continued for ~2.5 minutes until once again the water resistivity sensor tripped again. It appears that there is a~ 44kV limit on TM3. Attached is the data. I will present all of the data to the group tomorrow showing the results of multiple testing.

TM3 has been moved from the south hot cell to the conditioning station. David and I completed the move. All went well.

 A high voltage test was completed on a target free TM1 in the conditioning station. Only the turbo pumps on the target module were operational due to phase 2 construction. Testing started at 2:51PM with the following vacuum gauge readings, 1.6 x 10^-6 Diagnostics Box, 7.4 x 10^-7 Service Cap, 2.0 x 10^-6 Containment Box. Voltage was increased ~3kV at a time every minute until 21 kV was reached with a current of 0 uA. Voltage was then increased in ~1.5kV steps every 2 minutes until 30 kV was reach at a current of 60uA. This was held for 7 minutes until a spark occurred and the current spiked to 300uA and the voltage dropped. The voltage was dropped back to zero. The vacuum gauges had increased and read the following  1.6 x 10^-6 Diagnostics Box, 7.9 x 10^-7 Service Cap, 2.1 x 10^-6 Containment Box. Testing was restarted 2 minutes later (the vacuum gauges were still recovering for ~ another 2 minutes) and the voltage was quickly increased to 24kV reaching a current of 100uA. at 3:22 The current then fluxuated but trended up for the next 12 minutes peaking at a total current of 240uA. After this point the current started deceasing, at 3:41 the testing was concluded and the average current was ~170uA. The vacuum gauge readings were 1.6 x 10^-6 Diagnostics Box, 7.4 x 10^-7 Service Cap, 2.0 x 10^-6 Containment Box. It was deemed that this is "not ideal but good enough" to put the target on.  The maximum known required voltage will be ~22kV for Berillium which TM1 should be capable of providing.

TM4 has been moved from the South West silo to the South Hot Cell. New source tray, no target.

TM4 has been moved from the Conditioning Station to the South Hot Cell. No target.

 Roughing on TM3 was started at 11:26am today

The turbo pumps are on. TP1 and TP2 once again timed out and had to be restarted before they would stay on.

 Testing on TM3 without a source tray was completed on 13/05.2013. All items were tied to common and the water blocks were left open at the bottom of the module. They were left with the quick connections at the top. The vacuum was in the low 10^-6T range so this was deemed acceptable. The cooling lines withing the cage in the target hall were shorted so flow could continue. As you will see from the results a maximum of 44kV was achieved before a major spark turned the power supply off. I will be compiling all the the data so it can be compared. Also attached is the archiver data, strip tool data, and RGA data.

 The HV test completed on Monday was repeated today over a much longer time period. By taking longer there was slightly less sparking but once again a maximum voltage of ~44kV was achieved. The  resistivity of the water was much higher during this run so the leakage current was less but still in the >100 uA range. The spark that occurred during the ramp up to the maximum voltage caused the "water resistivity" limit to trip. This was a feed back through the control not the actual water changing as it recovered instantaneously. 

On May 16th 2013 the module was HV conditioned all day. As a result the maximum stable voltage has been increased to about 47kV (~4kV more than last test). A maximum voltage of 49kV was achieved but the module was very unstable. Attached is the data from the testing. Note that occasionally the sparking caused the PS to reset, it was turned back on and the voltage increased back to what it was (or lower) quickly.

   I have fallen behind on the HV testing that has been completed on TM3. Data can be found on docushare in the TM3 Rev 3 folder files are too large to attach. From the last elog entry the following tests have been completed

July 8 2013 - Long HV conditioning 50kV achieved before sparking caused PS to trip. Was unable to recover to the same voltage

July 9 2013 - Attempted to repeat previous test lost PS at 45kV. Voltage continued to degrade during the day.

July 10 2013 - Max voltage achieve 42.5kV discussed with Friedhelm and decided to run the EINZEL lens at 50% of the BIAS in case this is the source of the sparking

July 10 2013 - Max voltage 40.5kV with EINZEL lens. Communicated with Friedhelm and Lia. It was decided 40kV was good enough. Started developing standard test (see below for testing procedure) for Module so a with and without source tray 

July 12 2013 - Only one spark on route to 40kV. PS tripped after ~10 minutes at 40kV. Near the end of the day there wasn't enough time to repeat test.

July 15 2013 - Test repeated, could not hold 40kV. 39kV held for 1 hour with EINZEL lens off. Sparking was making it difficult to keep on.

July 15 2013 - TM3 was electrically disconnected from the conditioning station. The station ran at 60kV for 1 hour with zero sparks.

July 16 2013 - Test repeated with goal of 39kV intense sparking after 20 minutes caused the PS to trip. Once again the EINZEL lens PS was tripping and eliminated from use to make the test easier. With the failure of this test once again Friedhelm was once again consulted. He advised to stop testing as it appears to be causing damage. There is concern that the module is degrading. Lia has stated this does not affect the source tray and that a source tray will be inserted into TM3 and she accepts responsibility if the module does not hold voltage. 

Standard testing procedure for the bias was as follows. Please note that the EINZEL lens was supposed to follow the BIAS steps at 50%. This procedure was approved by Friedhelm prior to operating. This test was never successfully completed and we will not be able to complete a "apples to apples" test once the source tray is installed.

> Step to 5000 kV If no sparking after 1 minute

> Step to 10000 kV If no sparking after 1 minute

> Step to 15000 kV If no sparking after 1 minute

> Step to 17500 kV If no sparking after 1 minute

> Step to 20000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 22500 kV If no sparking for at least 1 minute after 5 minutes

> Step to 25000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 27500 kV If no sparking for at least 1 minute after 5 minutes

> Step to 30000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 31000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 32000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 33000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 34000 kV If no sparking for at least 1 minute after 5 minutes

> Step to 35000 kV If no sparking for at least 2 minute after 10 minutes

> Step to 35500 kV If no sparking for at least 2 minute after 10 minutes

> Step to 36000 kV If no sparking for at least 2 minute after 10 minutes

> Step to 36500 kV If no sparking for at least 2 minute after 10 minutes

> Step to 37000 kV If no sparking for at least 2 minute after 10 minutes

> Step to 37500 kV If no sparking for at least 5 minute after 10 minutes

> Step to 38000 kV If no sparking for at least 5 minute after 10 minutes

> Step to 38500 kV If no sparking for at least 5 minute after 10 minutes

> Step to 39000 kV If no sparking for at least 5 minute after 10 minutes

> Step to 39500 kV If no sparking for at least 5 minute after 10 minutes

> Step to 40000 kV Maximum 3 sparks per hour maximum test time 3 hours.

TM#3 with NiO#2 has been moved from the south hot cell to the conditioning station.

The module was checked electrically this morning before the module move. See the attached PDF for details.

Electrical check of TM#3 in the conditioning station under vacuum see attached PDF for details.

September 24

 After the manipulator repair Maico installed the NiO#2 onto the target module. Once connected I completed a leak test on the HS line with Isaac. The leak testing cart would not pump down originally (something wrong with the cart) but eventually it did start to work. The cart pumped to its lower limits and did not respond even with the module was flooded with helium. A electrical test was then conducted by myself and and Don Jackson (see attached). During the standard test the Target to Anode and to 60kV common read lower than expected at ~47Momh @ 1kV. Also of note during the conductance check the measurement from c-d was low at 1.82 mohm.

3  additional tests were completed 2 of which were coil to common (both sides). The resisance was measure at 47 ohm with the megger and 1.32 Kohm with the uohmmeter. The coil lines lines were also measured to get and indication of the resistance of a copper line. These lines were measured while they were not jumpered both the coil + and coil - measured 5.73 mohm.

A meeting with Lia and Friedhelm was held and and the decision was to move the module and test it in the conditioning station. Fingers crossed that the module will still work.

Sept 25th

Maico finished installing the cover today for the module to be moved. Other elogs cover the other activities for today.