Start cooling of Target RFQ empty

Sebastian Raeder wrote:

Start cooling of Target RFQ empty

 Tuesday, January 15, 2013, 16:09: Turbos off

Tuesday, January 15, 2013, 21:15: Start venting with nitrogen- SR

RFQ empty target installed

Wednesday, January 16, 2013, 01:05: roughing started

Wednesday, January 16, 2013, 01:34: turbos started

Wednesday, January 16, 2013, 01:43: turbos at speed

Wednesday, January 16, 2013, 01:44: vacuum at 1.7E-5T

Thursday, January 17, 2013, 08:16: started heating of the target, vacuum at 2.6E-7T

 Thursday, January 17, 2013, 14:55: current at 572A/6.95V (panel reading), vacuum at 6.7E-7T

Thursday, January 17, 2013, 18:40: measurements done, vacuum at 5.3E-7T, current 572V/6.94V, start cooling down

Friday, January 18, 2013, 11:28: turbos stopped

Started roughing

Friday, January 18, 2013, 15:25: Started turbos

Friday, January 18, 2013, 15:33: Turbos at speed

Friday, January 18, 2013, 15:35: Vacuum at 1.5E-5 T

After the last test at the test stand, one of the conductor bolts (ITD0058) is damaged. To prevent damage to the thread inserts, all conductor bolts will be replaced with new ones.

 The temperature of the cooling water was logged during this test. See attachments for details. Note that current and voltage read back is not available due to trouble with the power supply. One thermocouple (Heat Shield circuit) came loose before the end of the test (not shown in plot).

 For conductor bolt work

Monday, January 28, 2013, 12:56: Turbos off

Monday, January 28, 2013, 14:18: Venting

Monday, January 28, 2013, 14:41: Roughing

Monday, January 28, 2013, 15:35: Starting turbos

Monday, January 28, 2013, 15:43: Turbos at speed

Monday, January 28, 2013, 15:45: Vacuum at 3.9 E-6 T

Tuesday, February 26, 2013, 08:24: Started turbo

Tuesday, February 26, 2013, 08:24: Turbo timed out

e-fault 6585 submitted

Started archivers

Started turbos

Switched on ion gauges

TMSTP2 out as per precious e-log entry (and e-fault 6585)

Edi called to inform that he can replace the turbo today.

Tuesday, March 19, 2013, 09:03: Stopped TP6

Tuesday, March 19, 2013, 09:35: Venting

Tuesday, March 19, 2013, 09:48 : TMS section and backing line vented

The turbo pump has been replaced see

https://elog.triumf.ca/TIS/Test-Stand/284

Some heat marks were observed on the turbo pump that was replaced. Vacuum group took pictures.

Tuesday, March 19, 2013, 12:32 : Turbos off (vaccum at 2E-7 Torr)

Tuesday, March 19, 2013, 13:35: Venting

Target SiC#28 LP-RFQ inserted

New bolts used. Old bolts removed.

All bolts torqued to 120 in lbs

By Sebastian (SR) & Henning

modification of 9 Pin connector needed to match wiring in TM4 (see separate e-log entry)

Tuesday, March 19, 2013, 18:32 : started roughing - SR

Tuesday, March 19, 2013, 18:52: started turbos - SR

Tuesday, March 19, 2013, 18:57: TSGIP1 on - SR

Tuesday, March 19, 2013, 19:00: turbos at speed - SR

Tuesday, March 19, 2013, 19:02: vacuum at 1.68E-5T

By Anders

Wednesday, March 20, 2013, 08:18: Opened cooling water. Vacuum stable at 6.8E-7 Torr

By Sebastian (SR) & Henning

Wednesday, March 20, 2013, 11:39: 9PIN connector in HV cage connected

        4,5,6,9 on GND 1,2 to RF, 7,8,RFoffest,Source for now also on GND

        RF: 800kHz, 20Vampl, 0.128mA

        HV cage locked up for heating

Wednesday, March 20, 2013, 16:42: heating is taken care of by ISAC operations, now at 300A / 3V TGHT  and 250A / 1.47V TBHT reading on the panel is really close

        Friedhelm restarted some of the CANBUS ports, since not all optics were working properly

Thursday, March 21, 2013, 10:53 start cooling down

       Vacuum not perfect was around 2E-6T, over nigth not full current

       Suppression tested yesterday: full beam (SRC +3V, others GND) was 40nA, while no signal on FB0B with SRC +3V, IGOffset&Exit +25V

       !!!!! but short on #7 --> 2nd Repeller, was OK when tested, after some minutes on 25V short was there, reading now (Thursday, March 21, 2013, 10:58 ) <1OHM, will be checked while heating down

       Magnet had wrong polarity - so no mass scans yesterday evening, Friedhelm looked into this this morning

      Mass scan only for good transmission mode (SRC +3V) this morning - see attached scan (seen Na, Al, K, Ca, Cr, Rb, Sr, Cs and Ba)

Thursday, March 21, 2013, 12:26: stopped turbos

     #7 still short

By Anders

Thursday, March 21, 2013, 13:25: Venting

Edi replaced the faulty turbo pump in the mass separator section.

Roughing and turbo started

vacuum @ 9E-7T after 2.5h

The 9 Pin connector was rewired in the ISAC teststand to match the wiring in TM4

The wiring from the connection board in the HV cage to the connector (view from the target unit onto module) is now the following

      ---------------------------

  \     4     8     9     7     6    /

    \      5      1     2      x   /

            -----------------

with the pairs of wires

1,2   (kapton wire twisted pair all way)

4,5  (kapton wire twisted pair all way)

6,7  (kapton wire twisted pair inside the vacuum chamber,  other twisted pair from top of vacuum chamber to HV cage)

8,9  (kapton wire twisted pair inside the vacuum chamber,  other twisted pair from top of vacuum chamber to HV cage)

___ for completeness the wiring on top of the vacuum chamber (view from top onto the feedthrough)

      ---------------------------

  \     1     2     x     4     5    /

    \      6      7     8      9   /

            -----------------

NOTE: with this rewiring the metal screws on the PEEK 9Pin connector have been grounded using Ta foil

Thursday, March 21, 2013: there was a short in one of the lines  - most probably due to a shielding strand into the connector, has been resolved by fixation of the shielding in a position further away with Cu wire

   Thursday, March 21, 2013, 14:46: started roughing

                Target was out, visibly inspected, nothing to be seen, no short on the target - wiring of the 9Pin connector shows short circuit inside vacuum chamber

                Wires removed - short could be reproduced with the strandings of the shielding  from the kapton twisted pairs going into the peek connector

               wire shieldings now fixed to position further away with Cu wire

               all wires against ground and each other tested for holding 250V - all fine

               everything reconnected and target put in, torcked w 120 inch pounds

Thursday, March 21, 2013, 15:05 : turbos started

Thursday, March 21, 2013, 15:14: turbos at speed

Thursday, March 21, 2013, 15:17: vacuum at 1.4E-5T

Thursday, March 21, 2013, 18:01: vacuum at 1.45E-6T opening water lines - vacuum is stable

Thursday, March 21, 2013, 19:19 : vacuum at 8.6E-7T - start ramping heater to 580A / 250 A

Friday, March 22, 2013, 00:08: target is heated full way up

           setpoint 570A and 7.250V voltage limit

           readback 564.1A and 7.201V  --> needs more voltage than the normal target !

           vacuum at 1.2E-6T

Friday, March 22, 2013, 15:15: vacuum at 5.4E-7T

         preparing for HV test and mass scan

        transmission mode: Source +3V, everything else on GND: 12nA - mass scan see attachment

       suppression mode 1: Source -15V, everything else on GND: 20pA - mass scan see attachment

       suppression mode 2: Source +3V, everything else on +25V: <1pA - FC0 current while biasing see attachment

       NOTE:  the legs of the target are glowing differently, the left leg (view from the lid side onto the target unit) glows brighter, this side was open during the sintering process of the SiC and needed more alignment at the jig --> see attached picture

       NOTE2: there is a slight increase in TGHT voltage over time: in ~ 22h from 7.201V to 7.216V

Friday, March 22, 2013, 21:33 : vacuum at 4.8E-7, start ramping down

Friday, March 22, 2013, 22:47: heaters down and turned off, vacuum at 2.7E-7T

Monday, March 25, 2013, 00:15: vacuum at 1.4E-7T, IG off, turbos off

By Anders

Monday, March 25, 2013, 08:18: Venting

Monday, March 25, 2013, 08:33: Purging water lines

Monday, March 25, 2013, 08:42: Target removed

Target installed with 130 in lbs torque on all bolts.

Monday, March 25, 2013, 11:36: Roughing

Monday, March 25, 2013, 11:54: Starting turbos

Monday, March 25, 2013, 12:02: Both turbos at speed

Monday, March 25, 2013, 12:04: Vacuum at 2E-5  Torr

Tuesday, March 26, 2013, 08:03: Opened water supply. Vacuum stable at 3E-7 Torr

Tuesday, March 26, 2013, 09:11

All P/S switched on.

ISAC Ops will condition this target as a training exercise.

ISAC ops e-log
ISAC ops e-log 2

Wednesday, March 27, 2013, 13:41: ISAC ops called to inform that the target has been cooled down and bias is off.

Thursday, March 28, 2013, 08:22: Closed TPS:IV4 and switched off turbos.

Thursday, March 28, 2013, 13:27: Venting

Thursday, March 28, 2013, 13:33: Water purged

The powersupplies added to the teststand for operation of the IGLIS source have been removed from the HV cage as well as the RFQ driver.. The connections of the 9PIN connector in the HV cage have been grounded and the wire used for an voltage offset of the source has been removed.

NOTE: The Anode PS cable (used for biasing the target with a FEBIAD) is left grounded --> has to be rewired when running a FEBIAD source - Anode PS is turned off