Attempted to activate 2xUHV1400 connected to bottom C4, channel #2 using P 200 W, t rise 30 min, t hold 90 min.
Temperature of Kapton bundle increased drastically to 160+ C. Had to stop. Conclusion is that these are likely
the two UHV1400 on the bottom of CARME, immediately in front of the Kapton bundle.

Left the chamber to cool for a while. Baking temperature set to 85 C.
Repeated attempt using above parameters except P 150 W. Too hot. Had to decrease P to 75 W to remain below 150 C
on the Kapton bundle. Temperature on internals increases slowly, even with P 75 W.
Lesson learned: activate the UHV1400 next to the detectors *last*. Once on, temperature increase on the
detectors can be reduced but not stopped.

Attempted to activate 2xUHV1400 on bottom C4, channel #3 using P 200 W, t rise 30 min, t hold 90 min. These
cannot be close to the detectors.
Possibly due to interference with #2 being on hold, temperature of internals starts increasing. Reduced P to 125
W. OK.
Second lesson learned: temperature on internals is very hard to control once the UHV1400 close to them are
activated. Activate other UHV1400 first.

Set #2 to hold 50 W. Set #3 to hold 50 W.

Attempted to activate *3*xUHV1400 on bottom C4, channel #4 using P 120 W, t rise 30 min, t hold 90 min. These
are definitely close to the detectors.
Temperature increase modest but noticeable. Activation completed before temperature increases
too much.

17:30 German time
Activation complete. All NEGs off simultaneously.
Heating power off.

CARME slowly cools down (<10 C/h)
Opened some parts of the jacket to allow better cooling (still <10 C/h)

Pressure reaches E-11 around 19:00
SIP elements in D2000 still at 120 C. Too hot to turn on.

SIP elements will be turned tomorrow morning. That should conclude this baking cycle.

CARME reached 9E-12 this morning

Ion pumps on
No change in pressure.

Gate valve closed. Turbo sectioned off.

Pressure spikes (normal). Waiting for it 
to recover.

Will try to get rga operational later 
today.

Attempted first motor test in XHV. Wired and connected limit switches and string potentiometer.

Set up raspberry pi to control motors (.124). Set up pi for remote headless access.

Moved jumper on Teknic hub from 1 to 2 motors configuration.

Linux code only sees one motor and gives issues due to improperly set up limit switches.

Switched to Windows Clear path program. Left servo motor refuses to move and sounds stuck. Unable to move by hand - unclear how braking is still active.

Right servo motor initially moves, but got stuck after one move, on limit switch. Complain about sensorless startup which refers to low bias or excessive torque. The second looks more likely from the display but unclear why. Brake engaged for this motor as well? Unable to move by hand even after disconnecting all cables.

Removed safety pin from bellows (compressed air still missing, to be fixed next week). Motors move in. Pressure from 2E-12 to 3.5E-12 mbar and quickly recovers (seconds). Subsequent move cause smaller pressure fluctuation. All good.

Will contact PB too figure out issue with motors. Problem unclear. Might require some dismounting.

Removed thermocouples, heaters, RE72 modules and leftover baking tent. Support octagon removed except topmost part which requires disconnecting pneumatic hoses going to top gate valve. To be done on Monday with ML assistance.

Attempted to move servo motors once more - did not work. The motors appear stuck but it is not clear how or where. Removed screws on flanged ball nut and on motor back. Still stuck. Moving by hand is not possible. Code likely complains about excessive force on motor startup. Will discuss with PB. Some dismounting once back in air may be required.

Connected pneumatic hoses prepared by Gleb. Opened flow to pressure reducer set at 2 bar. Ok. Attempted to operate pneumatic motors. Somehow left / right pneumatic motors controls swapped around! Works fine otherwise. Most likely hardware issue, i.e. hoses are inverted inside motor box. Software fix possible in principle. Probably easiest to swap hoses going out from motor box (top to bottom and vice versa). Could not pull out hoses after installing. To do for next week.

Started connecting NEG and ion pumps. Realised wires are only labeled on one side. Had to separate all wires in one harness to make absolutely sure to know which wire is which. Second harness to be done next week. Please connect D2000 elements to bottom C4 power module, NEG getters wires 1-4 to middle power module and 5-6 to top power module. This means activation can proceed bottom to top of rack with minimal risk of mix ups. Please install top C4 module back in rack - missing appropriate rack shelf.

Installed Jan's Nim bin in rack. Jan thought that it was dead but seems to work just fine. Maybe test again?

To do next week 

Place thermocouples as per suggestion on file in baking Pi Baking directory.

Remove valves support. Install bottom of tent.

Install aluminium frame and heaters. This may require stopping the turbo pump and closing top gate valve.

Install rest of tent. Be careful not to pull or stretch the fabric. It's fragile to tension and fibreglass will pour out.

Install aluminised fibreglass and aluminium shell.

Start baking. Target temperature 120C.

CARME baking with heating tape continues

Left overnight at 100C. Turned up this morning at 9:00 to 120C.

All good except detector strain relief seems to be going much higher than detector (no obvious reason) and then cool down. Proximity to flange / heating tape likely. One potential solution would be to push the motor in, putting some distance between detector / strain relief and outside flange.

13:30 - Increased channel 1 to 130 (long tape) and channels 5 and 6 to 140 (bottom flange heaters). Left rest as was.

15:20 - Increased channel 2 and 3 to 130. No obvious effects except Magnet pipe goes up

16:00 - Increased channel 1, 2, 3 to 140. Increased channels 5 and 6 to 150 C.

Progress can be followed on

http://web-docs.gsi.de/~lestinsk/baking.php

http://web-docs.gsi.de/~lestinsk/vacplot.php

D2000 thermocouples report temperatures around 100C (D2000 #1,2) and 120C (3,4). 1,2 are in the intermediate chamber, 3,4 are behind the moving arms. 3 is directly being the detectors.

Wanted to flash ion elements in D2000, but SAES recommend >100C to flash.

Followed SAES procedure / pre-sets to condition D2000 NEG elements while baking, but reduced temperature from 250 to 150 C (1,2) 140 C (4) and 130 C (3).

No appreciable changes in temperature. Change in pressure quite apparent. Left elements at temperatures above. May consider increasing everything to 150 tomorrow assuming detector temperatures do not change.

May also consider conditioning NEG elements in intermediate and DSSD wall chambers with 15W power (150C?) during baking as per SAES procedure. We never did this before, but we never baked as such low temperatures either. Will have to activate NEG elements after conditioning either way.

Used thermocamera provided by GSI beam diagnostic division to take some pictures of YR09. See attached.

Due to aluminium outer wrapping some reflections are inevitable, but tried to only take pictures of heat spots that did not disapper from different angles.

Temperature calibration may be not perfectly reliable as well.

1. Gap close to CARME outside motors

2. CARME top valve

3. CARME top valve

4. CARME turbo

5. Interaction chamber looking downstream from outside of ring. Note flexible hose pumping Be window.

6. As 5, from inside the ring.

7. Interaction chamber detail (see top left in picture above)

8. IE514 sensor on interaction chamber bottom

9. YR09 from inside the ring. Note electron target

10. As above, looking further upstream

11. YR09 from inside the ring, looking downstream towards CARME

12. Electron target from inside the ring

13. Electron target from outside the ring. Biggest flange.

14. Interaction chamber from inside the ring

Increased conditioning temperature in D2000 #3 and 4 (behind detectors) to 150C from 130/140C. No appreciable change in temperature. Minor effects in pressure.

Pressure has completely recovered from yesterday and did not settle on higher/lower plateau value which may suggest conditioning the D2000 NEG elements has helped outgassing the chamber as a result of the low baking temperature.

Will now try to condition the UHV1400 furthest from the detectors at very low power according to SAES conditioning instructions.

The advantages are unclear at present, but more temperature during baking should not hurt final vacuum level. Will re-activate all NEGs anyway.

14:00 - Set power for all UHV1400 except those in the moving DSSD chamber to 20W. Some effects on both pressure and temperature. Will leave over weekend, start activation on Monday.

14:45

New run 55 with:

Right arm at 64.60 mm

Left arm IN at 36.54 mm

MBS working - hopefully

Target 7E11

Injection ca. 5E7

horizontal beam position 8.75 mm

vertical beam position  -5mm

Changed electron cooler set point to 244.2 V

Read value 243.66 V

Collector current 4.31A

Rates OK. Temps OK.

15:00

Detector 0 was noisy. Shook arm. Fixed it.

16:15

Detector 0 was noisy. Shook arm. Fixed it.

There is no beam in CRYRING since 16:05.

16:25

The beam is back but it is still a bit unstable and the operators are still trying optimize it.

17:20

We just did standard detector/electronics checks. Everthing looks OK.

17:50

Take screenshots.

20:50

Detector 0 was noisy. Shook arm. Fixed it.

But now detector 2 seems to have lost the Rutherford peak.

Screenshots taken and attached.

21:05

We did "Check ASIC Control" following Carlo's advise. This fixed the detector 2, but the detector 0 got noisy again. Another movement of the detector fixed the noise again.

22:15

Detector 0 was noisy. Shook arm. Fixed it.

23:05

This run has finished. The cooler voltage will be increased by 0.1V for the next run.

The latest spectra and detector/DAQ status are in the attachment.

(Fri 29 October)

Cleaned wire seal recess and labeled thermocouples and flanges to identify p-n vs. n-n side and ports with bias pin. See attached in case baking damages the label.

Grossmontage insisted to clean wire seal once more to remove black stains noticed when opening. Kapton vapour condensation could be possible cause. They used special cleaning product from XHV (not sure what - acetone mix with something?)

Lifted CARME back. Inserted wire seal. Closed chamber. Step is noted between central CARME section and other two - it's normal. Noted some damage to SS vessel on the outside. Unclear what could have caused it but it's only cosmetic.

Wire seal tightened with 20 - 40 - 60 - 80 - 80 Nm turns starting from top and proceeding in a circle. Had to temporarily dismount on foot to make space for torque wrench. Also had to saw off front part of ratchet attachmnent to slide wrench between GSI ion pump and flange. All other flanges closed by Grossmontage. Pump down started.

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.

ONLY FOLLOW THESE INSTRUCTIONS if E1 turbo is below 820 Hz, pressure in E1 is above 2.5E-1 mbar and experts (Nikos, Andreas) cannot be reached.

Go to the red cabinet under the stairs.

Open rightmost door. See first photo. Do not press the button on the handle or the door will lock!

Turn down pressure regulator indicated in second photo by approximately 1 degree. Read regulator to know which way to turn to decrease. No immediate change should be obvious on the pressure regulator.

Check E1 pressure for 5 minutes. If no effect, turn pressure down again until an effect appears.

Rudi and survey group representative came 
to CARME. 

Elephant feet confirmed to be out of 
position with respect to the models. Still 
unclear if CARME is where it should be 
with respect to the jet target and 
electron target. I.e. do they have space 
to mount? Do we have to move CARME again 
(hopefully not!!)

Valve to downstream confirmed out of 
alignment. Solution unclear but may be 
needed to ensure beam goes through 
detectors correctly.

Survey group will come to confirm CARME 
position on Thursday 16 September. We 
cannot mount baking tent until then, but 
no major issue given delays due to strain 
relieves and shutdown on 12-15 September.

Mounted both  motors on CARME. Started 
with outside motor.

M6x160 screws proved slightly too long to 
fix bellows to rod and seal the vacuum. 
Had to be manually shortened by 1 cm 
roughly.

Mounted whole assembly but could not fix 
actuator rod to moving plate due to holes 
mis-alignment.

Mounted motor on CARME but could not align 
holes on flange and chamber without 
turning motor to the side... see attach 3 and 4


Got in contact with Peter over lunch and 
understood issue.

Mounted second motor with experience 
acquired. No issues. All screws go in. 
Motor box level. See attach 5

Will need to dismount / remount first 
motor box before pumping down. Currently 
secure on CARME thanks to adjustable 
support.

Note we forgot to buy DN 40 CF gaskets. ML 
supplied a few. Will buy more. Needed 
between bellows and rod.


Strain relief mentioned in previous ELOG 
entry was taken to workshop and hole re-
drilled. Workshop reports other hole is OK 
for M3 screw. Either screw used or hole 
were poorly machined. M3 screws should be 
correct. Re-machined part sent for 
cleaning.

Will try with clean parts again tomorrow 
unless we remount motors.

Activities for the day cut shorter due to 
SPARC meeting this week.

15:40

Waiting for Serge to come in to change beam energy.

Remaining at the same beam energy and settings as before, except RIGHT arm now moving.

Run 31

37.96 -> 83.69 mm

16:53

Serge arrived. Run ended. Motors out. No storage.

Temps OK

Rates OK

08:27

No run going.

Temperatures OK - attach

Attempting to bias channel 3 again. Slowly ramping up.

V = 60, I = 5.3

V = 70, I = 6.1

V = 80, I = 9.0 --> 6.2 (unstable). Decreasing bias.

V = 70, I = 6.0 (stable again)

Leaving at 70 V for a while to condition (?)

Resetting the gnuplot graph. Old caen_current.dat moved to G22-205-caen_current.dat and copied in /TapeServer/G22-205

10:10

Temperatures OK

Leakage current on channel 3 showed some issues, back to stable. See attached.

11:00

Temps OK

Leakage current stable.

Increased bias on channel 3 to 80 V. I = 6.2 uA stable. Leaving for a while.

12:45

Temps OK

Leakage current stable

Increased bias on channel 3 to 90 V. I = 6.3 stable. Leaving for a while.

13:30

Temps OK

Leakage current stable.

Increased bias on channel 3 to 100V. I = 6.3 stable. Hopefully it holds until the end of the beam time.

20:00

Leakage current on channel 3 had issues again and bias was reduced to 50 V. Remained stable. Turned to 60 V now. Still stable. See attachement.

FEEs on detector for -> MEC

Temps OK - attach

Checks as before - attach

Rates OK (four fees not counting as expected) - attach

Deuterium beam in the ring at 2 MeV/A approx 2E8 pps, significant H2+ contamination.

Deuterium target working, fluctuating around 5E12-1E13 atoms/cm2

Vacuum in YR09 - 3E-10 mbar

Beginning beam-target overlap measurements soon.

(Tue 26 October)

Two new CARME DSSD arrived in GSI and collected. Visually inspected both sides. No obvious damage. Photos attached. Second detector (3335-2) was shipped in upside-down box. Does not seem to have made any difference.

3335-13 will be mounted on bottom of plate. 3335-2 will be mounted on top of plate.

Background without beam while source is optimised.

(Mon 25 October - Tue 26 October)

Considered different strategies to mount DSSDs inside CARME, while waiting for 2x new DSSD to arrive.

Plan A: Mount DSSDs on plate on the bench, slide plate on rod, then attach cables, then attach strain relief

Plan B: Mount DSSDs on plate, attach cables, attach strain relief, slide plate on rod, connect cables to feedthroughs

Mounted detectors on plate using new "dog leg" connectors. Threaded and unthreaded holes are flipped! Asked DR to unthread hole in two out of four, and clean.

Attempted to proceed with Plan B with stand-in broken detector. Found even a single wire harness attached to the detector was quite hard to insert in the chamber. Temporarily dismounted left-hand 2x UHV1400 to give more space.

Slid plate on rod. New position of rod block makes it easier to mount. Spraying ethanol on the rod to lubricate also helps greatly. Secured plate to rod. Holding flange with cables in left hand, attempted to mount macor plug in feedthrough with right hand. Unable to exert sufficient strength (CB, JM, OG). Pulling on the cable puts strain on the DSSD. Decided to avoid.

Attempted Plan A. Jacked connector in with no issues using M6x40 partly threaded bolts. Unable to unjack due to part threads! Obtained fully threaded rods. Unjacked using washer + two nuts tightened on each other. Jacked and unjacked another connector.

Decided to proceed with A. Having any cable pre-mounted in the chamber is a potential hazard to the detectors while mounting plate. Decided to dismount all flanges, re-organise harnesses and mount one flange+harness at a time after mounting detector on rod.

Used thick Kapton coated Cu from NEG pumps to organise the cables and improve strain relief.

Due to width of MACOR strain relief and nuts on the back of the MACOR plugs, realised strain relief cannot be mounted as intended. Asked DR to produce 90 x 30 x 3 mm extender plates instead. MACOR strain relief are 15 mm wide. Extender plate have 3x M4 unthreaded countersunk to fix to detector plate, 3x M4 threaded holes to hold MACOR strain relief.

Organised cable harnesses.

4 short: all good -> two to be mounted

2 long: all good -> to be mounted

1 long: Broken MACOR backplate and lead. Lead removed. Attempted to mount with backplate in new lead - unable to do so. Removing backplate requires re-crimping. Will have to send back to Edinburgh

1 long: Wires cross in odd way. Will have to re-organise. Probably requires re-crimping. One pin smashed during jacking. Not sure if rescuable. See attached.