Tested every strain relief. M3 screws get stuck at different points in each hole. Only one good hole out of 16
(2x8).
They were tested in Edinburgh - unclear if this is a result of baking at high temperatures, or bad screws, or
something else.

Easiest solution may be to re-machine holes and clean the connectors here in GSI.
Now investigating options.

Re-drilled SS supports in order to fit M3 screws.

Used hand tool cleaned with alchool for 6 of the 8.
Had to use machine for another two with thread damaged.

All 8 will be sent for cleaning. Should be able to start mounting at least the 6 ones tomorrow.

Reason for lack of fit still not clear. They were tested in Edinburgh. Possibly result of high-temperature baking?

Assembled feedthrough flange with re-cut 
SS support bracket. M3 vented on the 
sides, M3x30 partly threaded on top. Top 
screws don't touch the 
Macor (by design? See first attachment). 
Macor affixed but has 
some play - good for thermal dilation.

Mounted long wire harness (side flange) on 
top. Unable to get one of the two 
connectors fully in. Unable to get it out 
as well. See last attach, it's a small gap. 
Tested few pins with multimeter - all ok. 
Decided to mount.

No issues mounting. Slowly and carefully 
threaded wires harness in CARME taking 
care not to hit negs.

Slightly concerned about weight of Macor 
connector on wires, but no obvious 
alternative.

Please have a look at attachments and 
comment. Will keep mounting in the 
afternoon.

Moved cables that touched neg pumps. See 
photos. Please bear in mind perspective.
Note avoiding touching chamber 
bottom is not possible.

Re-installed motor to fix alignment 
issues. All good. See attached.

Started pumping down. Reached 3E-1 mbar in 
20 minutes (ok). Turbo on. After one hour 
turbo stable at 0.85 A, pressure on Pirani 
at 1.1E-2 (not reliable). 

IE514 doesn't report pressure, i.e. > 1E-4 
mbar.

Leak likely. Will try to pinpoint 
tomorrow. We only changed 10 flangese.

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.

Lifted CARME off the floor and mounted feet on sides. It was found impossible to put four bolts for each foot
due to alignment conflict. Three bolts were mounted per foot instead.

One of the mounting holes in CARME has been damaged and the thread has been ruined. Simple rethreading attempts
failed. Three good holes left - not an issue for now.

One of the shims between the feet and the chamber had to be modified in the workshop. Some feet were rather
difficult to mount, but in the end we succedeed.

CARME was then lifted on the Al frame and gently dropped. The crane remains in place overnight to prevent it
falling over given it is not anchored to the floor.

Front foot and back foot were also mounted. 

Elbows at the back were mounted.

Currently considering whether to mount gate valves before or after lifting in place on YR09. Lift experts will
decide tomorrow what is the easiest procedure given constraints on the ring.

See other attachment and next entry for current status.


YR09 downstream will be cleared tomorrow morning. Lift will proceed tomorrow afternoon.

Connected CARME to the CRYRING via tube 
plus bellows. See attach.

Had to lift CARME slightly wrt yesterday 
beam alignment to get a straight tube.

Tightened all flanges.

Added Pirani gauge and third IE514 to interaction chamber.

Stated pump down. Around 100 mbar on Interaction chamber Pirani gauge very loud metallic noise is heard. Found bellows between CARME and interaction chamber completely pressed flat. CARME and interaction chamber now much closer. Vented immediately. No pictures. Bellows return to normal state.

Repeated slowly and carefully using theodolite laser on reference point on CARME. Found CARME does not move appreciably forward, thus motion must come from interaction chamber frame.

Mounted two feet between CARME and interaction chamber. Pumped down again. Interaction chamber now moves by few mm. No issues with bellows. Left pumping overnight (Thu 4 November)

Found at 1E-6 mbar this morning. Leak tested. Found four minor leaks. Fixed by tightening. 

US + Kosmos installed Be window. Pumping down extremely slowly. 1 mbar per 2 second. Started turbo at 1 mbar. Pumping down overnight. No damage to window.

See attached new plastic free struts and motion of interaction chamber before after pumping. See skull nose.

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.

Lifted CARME with Al support on the 
CRYRING. No issues during transportation. 

Drilled new holes in the Al feet to fit 
elephant feet. Unclear if the issue is 
with the model, the frame or the feet 
themselves. In any case this issue is 
sorted.

CARME was designed to interface with the 
CRYRING via the cross section with pumps 
and sensors that we decided dismount. To 
replace this section a length of xhv 
tubing and a bellow will be employed. 
Prepared today, to be mounted tomorrow.

Aligned CARME height with beam height. 
This posed issues due to difficulty to 
adjust bolts under the cross members used 
to support the motors. See previous log 
entry.

Bolts under those cross members are now 
only finger tight. Unclear whether the 
CARME section will drop slightly if 
disconnected from main body. It's the 
section housing the moving Dssds. May be 
an issue for tightening it back. Will 
investigate.

Gate valves and supports to be installed 
tomorrow morning.

(30 August 2021)

The current state of YR09 is as per attach 1. CCC has been removed, but additional pumps and gauges remain. Some
will have to be mounted on CARME. Dismounting is scheduled for this Wed.

CB and RSS have been preparing for CARME to be mounted. JM supplied pictures of mounting process in DL. Attach 2-5.

2: Studs on carriages
3: CARME feet
4: Back foot
5: Elbows support

All components required have been located in the boxes except

- Cap hex bolts (M4 x 12?) to mount studs on carriages
- Plastic rails to remove cariages (a solution with bubble-wrap was found. Extra carriages are now in a box. Do
not turn it around.)
- Baking tray does not fit with carriages. Unclear how it did before. Will try to file down edges today.
- Bolts for CARME feet are of rather poor quality, and a host of different sizes. We may have to buy some, but
unclear what length.
- Studs are of different heights. That was not clear from previous pictures (attach 6)
- New and improved valve/elbow support (attach 7) is aligned worse than old one. Will keep using old one. Should
still work somehow.

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.

Mounted additional cross member for motor 
support. See attach 1

Washer required to make it fit on foot on 
one side.

Holes in Al support are not matching elephant feet...! Will have to re-
drill them now.

Yr09 fully dismounted downstream

03.09.2021   09:00   5.27E-7 mbar     
03.09.2021   13:00   4.08E-7 mbar                   

09;00    Will keep pumping down this morning.

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.

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.

Prepared the motors to be mounted and 
found all components required. No issues. 
May have to partly dismount again to fix 
bellows depending on ease of mounting.

Note extremely long screws mentioned in 
previous Elog inventory are to be used for 
the motors.

Attempted to swap Pirani gauge with ours 
but realised it's CF and needs appropriate 
port without risk of baking. That port 
would be on the interaction chamber which 
is not going to be mounted. Will probably 
keep using ABD gauge for now.

Peter spotted mistake in mounting front 
foot of CARME which is back to front. 
Correct mount will gain us 2-3 cm but will 
conflict with current CARME position fixed 
by tube on the back. Will discuss options 
with ML.

Motor mounting to take place on Mon with 
local technical support. No activities 
tomorrow unless a solution for the clamps 
mentioned in previous entry is found (i.e. 
what size bolts go on top). Peter will 
check step file and we will consult with 
local engineers on Mon pm.

Found CARME pressure at 2E-7 mbar

Raspberry pi took pictures until 4 am and 
then lost contact with camera. Reasons 
unclear. Plugging camera in / out solved 
the issue.  Will have to be investigated 
if it happens again.

Left list of things to do with RSS. In 
particular:
- Install xhv feedthrough and 
thermocouples. Prepared on desk
- Install blocking pin in right hand motor 
after pressure returns to atmosphere
- Cover bellows with aluminium to protect 
from fibreglass when mounting tent 
eventually
- Check all parts available for detector 
supports with mounting sketch Peter sent ( 
RSS to recover sketch)
- Investigate baking program logging. 
Unclear if logging is working - did we 
disable it for some reason? 

Valve on scroll closed. Scroll off. Turbo 
off. Pressure sensors off. Raspberry pi 
off.

Activities to resume on 16 September.



Attached are the pumping down plots
start point:  10.09.2021    19:00 
end point:    11.09.2021    16:00



10.09.2021    19:00    1.09e-6
10.09.2021    20:00    7.57e-7
10.09.2021    21:00    6.17e-7
10.09.2021    22:00    5.36e-7
10.09.2021    23:00    4.82e-7
11.09.2021    00:00    4.42e-7
11.09.2021    01:00    4.10e-7
11.09.2021    02:00    3.84e-7
11.09.2021    03:00    3.62e-7
11.09.2021    04:00    3.43e-7
11.09.2021    15:00    2.29e-7
11.09.2021    16:00    2.31e-7

Found D2000 #1 activated and at 250C (25W) 
to prevent getting dirty when other NEGs 
are activated. See previous entries.

Attempted activation of D2000 #2 using T 
390C , rise time 30 m, hold time 90 m

After 30 m temperature inside chamber 
increased by 5C. 390 C corresponds to 75 
W.

Attempted activation of D2000 #3 while #2 
is holding temperature. Same parameters as 
above except T 400.

After 30 min, temperature in chamber up by 
10 more C to 110.

Attempted activation of #4 as above.

Set #2 then #3 then #4 to 250 C after hold 
time is over to protect them. All D2000 
activated. Max temperature on Kapton 
bundle 110 C.



Attempted activation of 2xUHV1400 linked 
to top C4, channel 2.

No thermocouple available. Used power 200 
W (2x100) rise time 30 m and hold time 90 
min. Upon reaching 200 W no effect on 
chamber interior temperature. Increased to 
300 W. Temperatures increased to 120C max 
roughly. Acceptable.

Had to decrease hold time to 60 m to avoid 
remaining in cave alone for too long. 
Likely okay with 300 W (450 C?). Left on 
150W (400C?) to protect from subsequent 
activations tomorrow.

Because cables are unlabeled it's not 
clear how far the activated UHV1400 are 
from the detectors. If close, this recipe 
works. If far, we may have to use lower 
power for other modules.

Attempted activating 2xUHV1400 connected to top C4, channel #3 with P 300 W (450 C?), t rise 30 min, t hold 90
min as yesterday

Power reach 300 W, hold. Temperature increased by 5C. OK.

Activated top C4, channel #4 using same set of parameters. Internal temperature increases significantly, up to
140C and still increasing.

Decreased power on channel #2 to 100 W (down from 200 W yesterday). Should correspond to 350 C or so.
Temperature still increasing.
Decreased power on channels #3 and #4 to 250 W (425 C?). Temperature stops increasing. Around 155C on kapton
bundle. OK for kapton, detectors would have broken.
Baking code detected temperature on internals >150 C and stopped baking for safety. Temperatures do not change -
heating provided by NEGs more than enough to maintain current status.

Decreased power on channel #2 to 50W (250 C?). Temperature on internals decreases slightly. No major effect. 
This is likely because the UHV1400 corresponding to #2 are far from the detectors, while #3 and #4 are closer.

Decided to complete activation of #3 and #4 using 250 W. Set both to 50C after completion. Temperature of
internals decreases quickly.

Re-activated baking code when temperature on all internals <150 C. Setpoint 85C on RE72-1 and 95 on -2.

Now waiting for internals to cool down. Will activate remaining 3 sets (2+2+3 UHV1400) later today with P 200 W
(400 C?) t rise 30 min, t hold 90 min.
We know the set of 3 UHV1400 is definitely close to the kapton bundle. P 300 W (100x3) for that set.