Screenshots of all NewMerger statistics

Test of NIM WR source at Edinburgh

Attachment 1 - NIM WR source

NIM module upper SMA - DSO ch 1
NIM module lower SMA - DSO ch 2

Attachment 2

NO SYNC or CLK signals observed.

Noise observed with NIM bin power ON *and* OFF

Attachment 3

NIM WR source in EG&G Ortec NIM bin



... and with the Digilent Zybo board switched ON!


Attacments 4-7
Trigger ch 2
4, 40, 400 & 4000ns/div

Attachment 8
Trigger ch 1
4ns/div

12.44 DSSSD#3 bias -149.95V leakage current -6.448uA temperature +19.7 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

CRYRING cave lights ON - leakage current measurements @ 60s intervals

6.448
6.449
6.448
6.448
6.449
6.448
6.448
6.448
6.449
6.448

18.24 DSSSD#3 bias -149.95V leakage current -6.442uA temperature + 21.0 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

CRYRING cave lights ON - leakage current measurements @ 60s intervals

6.441
6.441
6.441
6.441
6.441
6.442
6.442
6.442
6.440
6.441

08.35 DSSSD#3 bias -149.95V leakage current -6.418uA temperature +19.6 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

DSSSD#3 bias OFF

09.30 CARME chamber status

      Edwards scroll pump ON
      Edwards Speedivac valves #1 & #2 OPEN
      VAT gate valves OPEN

      Re-connect Leybold Pirani gauge to local display/control
      CARME chamber pressure 2.4mbar

      Scroll pump should be able to achieve < 0.1mbar - indicates significant leak

      Davide will first check bolt torques for all flanges opened during most recent vacuum cycle

12.05 Additional torque did not resolve problems
      ML test COF600 seal with isopropanol and observed increased chamber pressure

      Will open COF600 seal after lunch

13.55 COF600 seal removed - one section marked by Kapton tape shows some distortion and a burr on the inner diameter - see attachments 1 & 2. 


      ML speculated that perhaps the seal was lightly too long and a section of circumference was forced outwards?
      Vacuum surfaces cleaned with isopropanol and tissues - red/brown discoloration probably indicating copper observed

14.30 New COF600 seal installed, flanges closed, bolts finger tight, bolts then systematically torqued in small increments 

      COF600 torques finger tight, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160Nm x2
      DN100 flanges doenstream finger tight, 8, 16, 24Nm

16.40 Start scroll pump and slowly rough chamber

18.00 Roughing CARME chamber pressure flatlines c. 30mbar indicating a large leak.
      ML ran some isopropanol around COF600 flange and observed response in roughing pressure of c. 0.2-0.3mbar at c. 30mbar which appears to confirm COF600 is leaking.


      

09.20 CARME chamber at atmospheric pressure as expected.

      Will open CARME chamber and inspect COF600 wire seal for similar (or other) issues to the seal removed yesterday. One possibility is that the COF600 flange 
surfaces/structures are misaligned and part of seal is 'escaping' the seal zone. Given the flanges close easily the misalignment would have to be small.

13.30 Observations

      The bolts on the upstream feet of the far detector chamber are all loose and have probably been so for some time

      Based on measurements with calipers and the insertion of shims into the *radial* gap between COF600 flange surfaces the COF600 flanges may be misaligned and rotated 
transversely by a fraction of a millimeter. The challenge is that the chamber is not designed for fine transverse adjustments and it is not easy to measure the changes.

      The Pfeiffer recommended procedure for closing COF seals is to start tightening bolts *diametrically* and then to tighten sequentially

https://www.pfeiffer-vacuum.com/en/know-how/mechanical-components-in-vacuum/connections/detachable-flange-connections/cof-flanges/

     The plan

     Adjust position of far detector chamber and secure upstream feet bolts

     Close COF600 flange using Pfeiffer recommended procedure

     Today is Friday so it will probably be Monday before we can pump the CARME chamber

13.50 Another view

     Grosmontage also inspected the COF600 seal this afternoon. They said that it was important that the seal should be installed under tension to ensure that it remained 
in position as the flanges were closed and the bolts begin to be tightened. They think the seals are a little too large in circumference but that they can shorten one on 
Monday morning. 

Grosmantage are scheduled to arrive 10.00 to inspect COF600 seals and their fit to the COF600 flange. They may decide to adjust the seals so that they fit the flange 
under 
tension.

Once Grosmontage are satisfied with the seal and its fit we can close the CARME chamber and start pumping down. 

Attachment 1 - photo of bakeout tent parts including those adapted/modified by Davide.


18.40 Grosmontage were re-tasked this morning.

      Davide, Omer, Cosmas checked alignment of COF600 male and female flanges.

      4x COF600 seals were checked - for some seals we observed wave over a ~ 10cm section of the circumference and/or surface scratches/roughness.
      Also observed that COF600 seals appeared to be too large - consequently the wire seal would be seated well ( i.e. in contact with the flange surface )
      for the majority of the circumference but would lift from flange surface for part(s) of the circumference.
      The fourth COF600 seal seated well over all of the circumference and we decided to proceed with closing the chamber.

      COF600 flange bolts tightened sequentially 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160Nm.

      ML roughed CARME chamber slowly ( < 1mbar/s ) to protect Be window. Turbo started at 1.3mbar. Pirani gauge indicated e-3 mbar range when turbo at speed.


18.53 IE514 gauge ON pressure 4.05e-5mbar.

19.10 Pirani 1.42e-3 mbar IE514 3.02e-5 mbar

09.15 Following overnight pumping of CARME chamber by Leybold turbo
      Pirani 1.00e-3 mbar IE514 2.83e-7 mbar

     The Leybold IE514 gauge currently in use is the CARME unit ( serial # 1054 ). The calibration data can be found at https://elog.ph.ed.ac.uk/CARME/56


09.44 Pirani 1.00e-3 mbar IE514 2.71e-7 mbar

10.10 Leak tester attached to backing line

      Valves to leak tester and turbo (connection to Edwards scroll pump in between) closed.

      Stop Edwards scroll pump with magnetic valve 'red' button - magnetic valves closes and Edwards scroll pump is switched off.

      Open valves to leak tester and then (slowly) turbo.

      Wait for leak tester to settle in e-12 mbar.l/s range. Leak tester pressure 3.6e-3 mbar. IE514 2.69e-7 mbar.

11.00 Pirani 1.00e-3 mbar IE514 2.42e-7 mbar
      Leak tester 1.8e-10 mbar.l/s

13.04 Pirani 1.00e-3 mbar IE514 2.06e-7 mbar

      Leak testing.
      Downstream DN100 flanges from CARME to dipole OK
      Lower NEG power connector feedhtrough (downstream chamber) OK
      Left hand side (looking downstream) bellows OK

      c. few e-9 mbar.l/s leak bottom left (lookimg downstream) of COF600 wire seal

      Additional torque to M16 bolts bottom left - c. 10 bolts -> 220Nm+

      c. 0.1-0.3e-11 mbar.l/s

      Further checks around circumference of COF600 seal reveal some small leaks c. e-11-12 mbar.l/s.? However background rate
      in leak tester too high for sensitive test - will await recovery to resume checking.

14.00 Pirani 9.8e-4 mbar IE514 1.96e-7 mbar
      Leak tester 4.9e-10 mbar.l/s


14.35 DSSSD test
      IE514 OFF

Ambient temperature 21.5 deg C

Top right
-10V -4uA
-20V 10uA
c. -30V > -20uA trip

Top left
-150V -5.15uA

Bottom left
-150V -4.97uA

Bottom right
-150V -6.33uA

Top right (repeat)
-20V -10uA
-25V -14uA

15.28 IE514 ON
      Pirani 9.8e-4 mbar IE514 1.87e-7 mbar

15.40 c. few e-9 mbar.l/s leak around magnetic valve - probably not an issue in terms of backing performance but may interfere with/confuse leak testing

16.05 Pirani 9.8e-4 mbar IE514 1.74e-7 mbar
      Leak tester 1.2e-9 mbar.l/s

Will leave CARME pumping with leak tester on roughing line and see whether leak rate recovers. If so, will continue leak tests tomorrow. 

18.50 Pirani 1.00e-3 mbar IE514 1.48e-7 mbar
      Leak tester < 1e-12 mbar.l/s (leak tester valved off)

09.16 Pirani 1.00e-3 mbar IE514 8.77e-8 mbar
      Leak tester c. 5e-12 mbar.l/s (leak tester valved off)

09.48 Pirani 1.00e-3 mbar IE514 8.67e-8 mbar
      Leak tester c. 3.5e-12 mbar.l/s (leak tester valved off)

10.33 Pirani 1.00e-3 mbar IE514 8.55e-8 mbar
      Leak tester c. 4e-10 mbar.l/s (leak tester connected to CARME roughing line)

10.55 Leak tester remains at few e-10 mbar.l/s - we do not understand why
      With leak tester in differential mode the highest reading around the COF600 seal is c. 3.5e-12 mbar.l/s
      Following checks elsewhere on the chamber we observe c. 6e-12 mbar.l/s which presumably reflects accumulation of He around the chamber 

      Dispersing He with compressed air reduces diff mode reading to c. 2e-12 mbar.l/s

11.00 Pirani 9.80e-4 mbar IE514 8.47e-8 mbar

14.49 Pirani 1.00e-3 mbar IE514 7.71e-8 mbar
      Leak tester isolated from CARME backing line - CARME Edwards scroll pump now backing turbo.

09.28 Pirani 1.00e-3 mbar IE514 5.45e-8 mbar

12.10 Bakeout tent frame installed
      SAES UHV1400 NEG pump power cables #1-6 installed
      See attachments 1 & 2

16.35 Attachments 3-6
      upstream baseplate
      3x sets of heaters beneath CARME chamber connected to CRYRING heater/TC manifold - attachments 7-8

      
16.45 Pirani 1.00e-3 mbar IE514 4.80e-8 mbar


17.10 SAES D-2000 #1 downstream, outside   NEG power + HV ( attachment 9 - OK cable connector )
      SAES D-2000 #3 downstream, inside   NEG power + HV
      SAES D-2000 #4 upstream, inside   HV
      SAES D-2000 #2 upstream, outside   HV

2x ( of 4x ) SAES D-2000 neg power cables were broken - forward-shell detached (unscrewed ) from back-shell remaining attached to D-2000 neg power connector. 
Re-assembly is straightforward but it is unclear how the 6x female sockets are aligned with the connector keys of the forward-shell (attachments 10-11 cf. attachment 9).
Until this is understood these 2x SAES D-2000 neg power cables should not be used.

17.33 IE514 pressure 6.4e-11 mbar, ambient temperature +20.8 deg C

      The thermocouples on the 3x groups of heater elements have been detached from direct contact with the heating element and now float abpove the heating element by 2-
3cm - see attachments 1 & 2

      The vacuum group IE514 and Ametek RGA are still attached to CARME - see attachment 3. Have requested vacuum group remove them.

      The 'air side' of the Be window on the interaction chamber is under vacuum provided by small Agilent scroll pump.

      

09.07 IE514 pressure 6.4e-11 mbar, ambient temperature +20.3 deg C

      Using appc218 ( account carme ) workstation by the CARME 19" rack 
     
      ssh pi@carmebakingpi

      Re-connect to bakeout monitor app 

      screen -dR

      See attcahment 1


12.02 Vacuum group ion pump disconnected and RGA removed from CARME chamber -  outside of CARME bakeout tent 'closed' - see attachments 2-4

      Vacuum group IE514 to be disconnected


14.45 Vacuum group disconnect their IE514

      Inside of CARME bakeout tent closed

      Photos of the CARME bakeout tent inside and outside CRYRING - see attachments 5-7  

16.55 CARME IE514 8.2e-11 mbar

      Vacuum pressure increased slowly overnight from c. 6e-11 mbar yesterday to c. 8e-11 mbar today following low power startup tests of the bakeout controller heating 
the CARME interaction and detector chambers yesterday and today.


Attachment 1 - bakeout controller config courtesy Anton Kalinin

Attachments 2 & 3 - bakeout controller summary displays and CARME bakeout monitor display c. 17.00 today

The 3x CARME heaters are connected to controller #4 zones # 1-3, i.e. lower right display, zones 1-3, mains fuses F9-F11

17.30 3x ( of 4x ) SAES D-2000 ion pump controllers ( SIP modules ) switched off. Fourth controller was already switched off and SHV cable disconnected from rear panel of 
SIP module.

10.20 CARME IE514 8.6e-11 mbar

      CARME bakeout monitor and ELOTECH bakeout controller status - see attachments 1 & 2

      The CARME bakeout monitor shows recovery from test yesterday evening. The ELOTECH controller was switched to manual mode for the 3x CARME zones and 5% power selected 
for 45 minutes. CARME TCs increased from mid-20s to high 20s/low 30s over a period of 45 minutes. At the conclusion of the test power was set to 0% for all 3x CARME zones 
and the mode changed from manual to controlled.

09.50 CARME IE514 9.0e-11 mbar, ambient temperature 21.3 deg C

      CARME bakeout monitor and ELOTECH temperature controller - attachments 1 & 2


10.15 Commence bakeout ramp
      Set all ELOTECH PID temperature controller zones ( channels ) to 50 deg C
      Expect all non-CARME zones to reach temperature set point quickly. There will be a delay for the TCs corresponding to the CARME heaters but the internal CAME TCs 
will respond more slowly- will observe response of CARME TCs over time.

10.35 ELOTECH temperature controller - attachment 3

11.10 CARME TCs change from c. 25-28 deg C to 28-35 deg C

11.15 Set all ELOTECH PID temperature controller zones ( channels ) to 100 deg C

12.15 CARME IE514 1.39e-10 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor and ELOTECH temperature controller - attachments 4 & 5


14.20 CARME IE514 3.62e-10 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH temperature controller front panel and Grafana bakeout dashboard- attachments 6-8

15.20 Whilst all of the ELOTECH temperature controller TCs are at their current set point ( 100 deg C ), the CARME TCs are not yet at equilibrium. Plan to leave system 
in current state until tomorrow morning. Assuming CARME is at equilibrium will then increment ELOTECH temperature controller TC set points.

17.50 CARME IE514 6.59e-10 mbar, ambient temperature 20.6 deg C

      CARME bakeout monitor, ELOTECH temperature controller front panel and Grafana bakeout dashboard- attachments 9-11

10.50 CARME IE514 7.14e-10 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 1-3

      Change ELOTECH R4000 set points for CARME heaters #1 and #3 to 125 deg C

14.20 CARME IE514 8.25e-10 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 4-6

      Change ELOTECH R4000 set points for CARME heaters #1 and #3 to 150 deg C

18.30 CARME IE514 1.29e-9 mbar, ambient temperature 20.7 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 7-9

      Change ELOTECH R4000 set points for CARME heaters #1 and #3 to 175 deg C and heater #2 to 125 deg C

11.20 CARME IE514 3.53e-9 mbar, ambient temperature 20.6 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 1-3

      Change ELOTECH R4000 set points for CARME heaters #1 and #3 to 200 deg C, heater #2 to 150 deg C

14.10 CARME IE514 6.12e-9 mbar, ambient temperature 20.7 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 4-6

      Change ELOTECH R4000 set points for CARME heaters #1, #2 and #3 to 225, 175 and 225 deg C respectively.


18.10 CARME IE514 1.92e-8 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 7-9

      Change ELOTECH R4000 set points for CARME heaters #1, #2 and #3 to 250, 150 and 225 deg C respectively.
      All other ( active ) ELOTECH R4000 set points ( interaction chamber etc ) to 130 deg C.

20.25 CARME IE514 2.14e-8 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 10-12

      No change to ELOTECH R4000 set points

09.35 CARME IE514 1.95e-8 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 1-3

      No change to ELOTECH R4000 set point

17.45 CARME IE514 1.91e-8 mbar, ambient temperature 20.8 deg C

      CARME bakeout monitor, ELOTECH R4000 temperature controller front panel and Grafana bakeout dashboard- attachments 4-6

      No change to ELOTECH R4000 set point