Found CARME at 2E-7.

Closed valve on top of roughing pump. Clamp was not tight. Pressure still good.

Connected to leak cart instead. Brought leak cart to 1E-2. Did not open valve yet. Found CARME pressure at 7.5 mbar. Leak in the backing line? Unclear what happened but moving backing line flexible hose increases pressure. Tightened all clamps. Moving backing flexible hose no longer seems to have effect.

Pumping down again for leak tests. Turbo looks and sounds fine.

Recovered E-6 in few minutes. Reconnected leak cart. Pressure does not increase. Still not sure what happened earlier. Beginning leak tests.

Leaks found in the wire seal around location of picture attached. Would suggest tightening wire seal tomorrow and check again. Leak must be small given base pressure achieved.

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.

This morning the pressure achieved was 1.44E-7 mbar. Leak testing showed an overall leak rate of 1.5E-10 mbar l/s, this is below the previous leak rate but still significantly above the leak rate from elog 141 of the CARME chamber on its own. Spraying helium, a leak is visible on the VAT gate valve on the interaction chamber (inside of the ring). The leak rate increases to ~2.3E-10 mbar l/s. No increase in the leak rate was observed elsewhere on CARME or the interaction chamber. It was decided to vent again and replace the gasket and inspect the knife edges for the valve. 

The valve was removed and the gasket was replaced. Several scratches are visible on the gasket which may be the cause of the leak (or damage may have been done during dismounting). While vented, the backing line was re-organised. The scroll pump is now on the outside of the ring for easier access (see attached image), the turbo pump was rotated to move all power cables and the backing line to the outside of the ring. 

CARME and the interaction chamber were pumped down again and the ion gauge was activated. Vacuum can be followed via the vac plot or by grafana on the carme-gsi computer (anydesk required). 

Leak tested CARME via He leak tester + He 
bottle. No leaks could be found. Some 
indication of potential leak close to 
blind flange on bottom valve - disappeared 
after closer checks.

Outgassing from cables? If so second turbo 
may be required for baking.


Removed leak tester. Scroll on, turbo on. 
Pumping down overnight.


Tested baking system. Missing:
- Monitor (not shipped from DL??)
- Monitor power cable
- Power cable for USB hub (not shipped??)

Could find the first two, but monitor is 
of poor quality.

USB to RS232 cable damaged in shipping 
(poorly secured). Still works, may be 
worth repairing but not trivial. Only 
works plugged in to top USB 3 port on Pi.

System tested and still working aside from 
these issues.


Connected webcam to pi facing IE514 
display. Will take pictures every hour on 
the hour as in DL.

Will stop pumping tomorrow pm due to 
imminent shutdown.

Pressure at 5E-6 mbar decreasing.

Left bias in overnight. Leakage current decreased and stabilised. See attached. Bias off as we prepare to mount the fees.

Found CARME at 1.0E-6 mbar. Beginning leak test.

Found leaks in the same location as before. Roughly 1~3E-8 mbar l second vs. base leak of 1E-12

Tightened right hand half of bolts to 120 Nm. No changes but leak goes up to 1E-10 mbar l second when tightening bolts closer to leak location, without He being sprayed.

Tightened bolts closer to leak to 140. Leak goes down to 1E-9 mbar l second

Tightened four bolts closest to leak to 170 Nm. Leak disappeared (<1E-11 mbar). Tested repeatedly all around CARME including left hand side of 600 COF flange. No leaks.

Vented. Installing jet target in the afternoon.

22:30 Shift handed over. DAQ OK. Target OK. Beam OK.

00:22 Temperatures OK

Stats OK

Good events OK

Scalers OK

System wide checks as usual - WR fails by 68 ns

Leakage current OK

Target OK

Motors OK

Pressure in ring 5E-10 mbar OK

Beam OK

02:26 - All OK as above

WR now fails by 80

Data rate ~800 KB/s

03:40 All OK as above

Data rate back to ~ 1900 KB/s

04:20 All OK as above

Started compressing files in WS3, monitor 1

Noticed bias is not as stable as it has been so far, but no reason for concern. See attach.

04:30 Saw a spike in counts similar to beam halo. See attachment. Did not see it before. No effects on leakage current. To be checked offline.

06:00 Could not see any more spikes

All other checks OK as before.

Data rate back to ~1000 Kb/s

06:32 Requested beam off for end of beamtime.

Left DAQ on - run R88

Turning off jet target as per Nikos instructions

Final cleanup + pulse walkthrough to be done by JM and OH later today.

Target nozzle removed - pressure in S1 now 1.93E-8 mbar

Valves closed

Entering cave to switch compressor off and change N backing pressure to 10 bar.

Found strut bolts in the bag with 
spherical washers. Mounted the struts and 
the washers. See attach 1.

Vented CARME in preparation for lift.

Turbo off
Pressure starts increasing without 
introducing leaks. Up to 10-4 mbar. IE 514 
off.

Removed plastic cap from leak valve. 
Pressure rate increases. Leaky valve?

Turbo motor speed reaches 0 Hz in 1h

Opened leak valve. Scroll off. Pressure to 
10 mbar. Not increasing anymore. Turbo 
leak aperture likely to small to vent 
CARME volume.

Disconnected scroll. Carefully let air in 
by tweaking flexible hose connection. Not 
recommended again, but should be safe 
given turbo fully stop and chamber nearly 
vented.

Reached atmosphere in 10 minutes.

Now waiting for lifting support to mount 
feet.

Attempted to mount cable clamps for strain 
relief on inner part of Allectra 
feedthroughs.

SS support mounted with M3 vented screws 
OK
Cannot figure out which bolt type to use 
to fix Macor on SS support.

M2 falls through

M3 screws in partly and gets stuck...
Will need to figure out how to get unstuck

No M2.5 bolts available.

In contact with Peter. Not clear what the 
solution was

Will try again tomorrow or move to motors 
first.

Attempted to close CARME as carefully as possible.

Swapped out one foot for another one and temporarily removed a second to allow CARME to rotate slightly and get a better alignment of the two surfaces of the COF600 flange.

Closed CARME but realised carriages with struts are such that carriages touch before flanges do. Worse on side with leak than side without. See attached. As a result we would not be able to close properly.

DR to modify the holes in the feet closest to flange on CARME front to allow surfaces to touch before carriages come in contact. Hopefully close later today.

Issue was not encountered earlier because CARME was fully mounted before being dropped on feet. Struts were forcefully brought close to allow CARME to descend. Unclear how this was done in DL but may be baking had altered some sizes enough for the issue to appear. Spare feet do not help significantly.

Closed CARME . 1. Bolts finger tight. 2. Bolts tightened with tools stopping as soon as resistance is felt. Tightening done from the top descending towards the right (clockwise) and from the bottom counterclockwise. 3. 20 Nm applied in the same way 3. 40 4. 60 5. 80 6 80 again but single operator going round 6. 100 single operator

Pumping down overnight

In order to install the detector supports 
and eventually install the detectors 
themselves CARME must be split and 
separated via rails.

However it does not look like we have 
sufficient clearance on either side. See 
pictures attached.

I suggest we mount the strain relievers 
wires and motors, not split CARME, and 
pump down + bake to give us time to figure 
out what is different from the models and 
how to fix it. Outgassing from detector 
supports should be negligible wrt wires.

One possibility would be to install rail 
extension on the back side of the Al frame 
where the cross was meant to be supported, 
temporarily remove the tube connecting 
CARME to the YR09 valve and slide CARME 
back. Will need to discuss with Peter.

Found SIP power unit for D2000 #4 not functioning correctly. Max current regardless of ion element connected to.

ML kindly loaned a spare. All D2000 work Ok now. Will have to send faulty unit for repairs back to SAES.

Opened up front part of tent just enough to allow GSI vacuum division to connect IE 514 and GSI ion pump. Tent to remain until January.

Left to do this year:

- Turn on GSI ion pump

- Turn on GSI IE514

- Close top gate valve

- Turn off maglev turbo (very close to magnet)

Screenshots and ParamModi settings export attached.

02:25
Zoran was unable to ignite the ion source.

He has given some parameters to the control room so they can wiggle stuff around and try and ignite it.
He also said it may at some point ignite itself.
In worse case scenario, the person who usually manages the ion source will come in from 7am-8am, read Zoran's notes and try and get it working again.

Also target density seems a little worse but still hanging above 2e-8 to 2e-4

Vaccum
DN250CF 1x gaskets     
DN200CF 5x gaskets  
DN160CF 1x gaskets, 2x blank flanges   
DN100CF 69x gaskets, 19x blank flanges, 14 double feedthroughs (1 damaged) 
DN63CF 3x gaskets, 2x blank flanges    
DN300CF 5x gaskets
DN350CF 0x gaskets
1X WIRE SEAL
DN35CF 3x gaskets, 13 blank flanges   
DN16CF 22x silver gaskets, 27x copper gaskets   

Swagelock
SS-QTM2-D-8M0 Male quick disconnect X18
SS-QTM2A-B-8M0 Female quick disconnect X21
SS-8M0-1-6RS Manifold adaptor X39
NY-8M3-1 Front ferrule X118
NY-8M4-1 Back ferrule X120
Stainless ferrules XMANY

FEE/FEE HOLDER PARTS
FEES x1
Fully assembled FEE holder (MINUS ADAPTOR BOARDS) x1
Cylindrical supports x32
Feedthrough mounts x12
Black adaptor board mounts x11
Spring loaded FEE lock x26
FEE holder side panels x5 pairs
Adaptor boards x2 (1 slightly bent pins)
FEE rail bolts x4
M3X16 281-013 x91
M3 locknuts 260-5815 x34
Springs 821-273 x40 
M4x25 (2mm too long) 281-057 x32
M6x20 281-120 x69
M3x6 280-981 x34
Assembled Hose 1.5M (Red) x8
Assembled Hose 1.5M (Blue) x8
Blue Hose ~16M
Red Hose ~10M

We require additional gaskets for those we are low on (<5) DN35,63,160,250,350 and more wire seals 

We should have enough swagelock and FEE holder parts to construct another 4 FEE holders for the remaining required for mounting all moving detector FEEs.

We also need fuses for the USB mains relay and power supply -> 2x 250v 10A, 16x 250v 1.6A. Dimensions for both are the same, length=20mm, Diameter=5mm (images attached)

Additional fittings provided by GSI for the manifold are in the swagelock box.

Prepared to move interaction chamber in place. Ok CARME side, flange has M10 bolts. On interaction chamber side i.e. bellows it has M8 bolts.

DS designed this to have loose fit under assumption of  M10 side actually being 3/8 holes i.e. 9.9 mm. However holes are 10.2 mm. Furthermore Grossmontage suggest loose fit will be damaged in baking in the long term.

Dismounted bellow ring from spare bellows. Re-drilled to M10 and cleaned. Remounted. Old bellow outer ring moved with spare bellows.

Lifted interaction chamber in place. Alignment started. Will finish tomorrow morning, followed by pump down and leak test. Last step before beginning final pump down should be mounting Be window on Friday. Need US for that.

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.

The turbo pump E1 is continuing to draw too much current and the rotation frequency has steadily decreased from 817 Hz at the beginning of the night shift to 800 Hz now. The frequency recovered after the temperature was increased.

Both of the valves (inlet and dump) have been closed to improve the vacuum in the ring.

12/08/23

Baking testing. Aim to find relationship between heater temperature setpoint and the temperature of the chamber and floating temperature in the baking volume. Behaviour of the heater tempertures and ability to control the heating is also required. Ambient chamber temperature ~22 C. Interaction chamber temperatures will be raised to the level of the CARME chamber throughout, starting temperature of the interaction chamber with heating off is 28 C. P = 7.5e-9 mbar

CARME thermocouple temperatures can be read from the monitoring code which is currently running in a screen session on the baking pi. Heater temperatures and pressure in YR09 can be read from Grafana.

15:40 CARME heaters turned on, set point 50 C. Ramping is ~ 1C per minute for the heaters. 

16:00 Thermocouples inside baking volume show small increases. Setpoint increased to 60 C.

16:10 Setpoint increased to 80 C.

16:30 Setpoint increased to 100 C.

16:45 Setpoint increased to 120 C

17:00 Setpoint raised to 150 C. Average chamber temp ~ 25.2 C, bottom of the chamber is ~28C. 

17:45 Setpoint was maintained at 150 C, temperatures of the heaters continued to rise past this setpoint and were floating about 200-230 C with large variations in the temperature. At lower setpoints the heater temperature appeared to rise linearly with the 1 C per minute. I do not believe I currently have control of the heating. Average chamber temp 28.8 C with bottom of the chamber ~35-37 C. Heating has been turned off while I grab some food. P = 1e-8 mbar

Next test will be to try and maintain a consistent heater tempreture for a longer period of time, probabably at a lower set temperture. 

13/08/23

10:00 Heater setpoint to 50 C. Will maintain at this level for a while to look at increase in chamber temps and see if heater temp remains stable. P = 8.52e-9 mbar

11:47 Heater temperatures have been constant at ~ 55 C for the last hour. Little heating observed in the chamber, requires much larger temperature to heat the baking volume. Setpoint increased to 100 C.

13:10 Heater temperatures have been constant at ~103 C for the last  40 mins or so and appears stable. Temperatures are rising at a steady rate but temps are still low. Interaction chamber heating jackets activated to be a same temperature as CARME. Will require higher temperatures to heat the baking volume.

16:15 Heater temperaturtes have remained constant at ~103 C. Temps inside the baking volume remain low, Increasing heater temperature to 135 C.

18:30 Heaters temperatures remain stable. Larger fluctations are apparent than at a setpoint of 100C with temps between 140 and 150 C. Chamber temperatures increasing avg is ~ 35C, was aiming for 50C over the weekend. Increasing setpoints to 170 C.

20:50 Heater tempretures are stable. Average chamber temp is ~ 40 C. Interaction chamber heaters set to 40 C to keep constant with CARME. Pressure has increased to 2.9e-8 mbar. Heater power outputs are visible in last image, heaters currently turn on at ~80% max power about twice every 5 mins. I expect temps of 250-300 C are required to obtain significant temp increase up to 100 C on the chamber. Chamber temps appear to be fairly stable at this point, will leave for now and check back in a few hours.

23:00 Heater setpoint temp reduced to 135 C to maintain temperatures inside the baking volume overnight with no increase. Heater power has now reduced to < 50 % full power when the eaters are on. Pressure in the chamber is 4.4e-8 mbar.

I believe I now understand the heating system and plan to increase the chamber temperature throughout the day tomorrow. Aim is to get close to full bakeout temperatures.

Currently 4 possibilities to have a look at the beam, all of them are OK to check whether there is beam or not, but some of them are better for checking absolute values.
- Schottky RF signal
- Schottky zero span signal
- CRYRING Radio (signal from BPM) --> YR12DA1R
- ICT (integrated current transformer) --> YR12DT1C

absolute measurements:

- currently the beam is at 5.5 MeV/u calibrated on the flat top. The signal of ICT before is noisy but on the flat top it is well calibrated.

relative measurements:

- The signal from CRYRING radio, has a good amplifier and is frequency independent with a nice log signal. it can be used for relative measurements

- The zero span signal of Schottky can be used, but it is not reliable for measuring the number of ions since change in the control room may change the signal level.

- Schottky RF signal can be viewed by running Launcher-App using the button "VNC Tektronix RSA". The only problem is that only one instance can run, so if in the control room someone needs it, in the container it will disappear.