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.

Continued to mount flanges as per previous ELOG entry.
Peter also remarked that the wires look a bit loose inside the holes, although this is how they were during
dirty tests in Edinburgh.

Attempted to pack the wires in two holes rather than 4 - too tight. Cannot close.
Packed the wires in 3 holes instead. Better, but still a bit loose. Wire harness feels quite robust and no
obvious strain is placed on the connectors.

#1 flange left with four strands for now.
Connectors were tested in this way in Edinburgh for motion tests. No broken cables after several thousand
repetitions.

Had troubles with second flange being mounted. Glove was caught under MACOR connector. Managed to free it
somehow with a cleaned screwdriver. Other half of the flange refused to go in due to bent pins, until NB was
able to repair it.
Mounted as #5.

Most other connector pins OK. Had to adjust a very small number. Cause of damage unclear - transportation? See
photos.

Took some pictures inside the chamber. Most connectors look OK, but

- One harness is touching the NEG wires (#2). This could be an issue. Will try to move it tomorrow
- Wires hanging from the top may be putting a lot of weight on the connectors. See pictures. Given number of
wires this may be acceptable.
- One harness is touching the NEG cage. Definitely an issue. Will fix tomorrow

Top/bottom flanges mounted with short harnesses. Side flanges mounted with long harnesses.

Two flanges left to mount.
Only #1 has been tightened. Other flanges left finger tight for Grossmontage to tighten properly tomorrow.

Outside motor to be fixed tomorrow.

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.

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?

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.

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.

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.

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.

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.

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.

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.

Mounted both gate valves and support. Gate 
valves could not be installed one bolt 
rotated from 90 degrees as per drawings 
due to mechanical conflict with back foot.

Using rotating flanges some small rotation 
from 90 was achieved. This may be 
sufficient given the reason for the 
rotation was to avoid mechanical conflicts 
with ring parts that are no longer there.

Valve struts had to be modified as gate 
valve is much lower and close to Al frame 
than in Daresbury.

ML suggested that the reason for the 
change in height mentioned in previous 
entry is that the ring gate valve to YR10 
is not centered. Solutions will be 
considered when the other two setups in 
YR09 are mounted and the alignment 
situation is more clear


Noted a few blind flanges are bluish, 
which indicates SS 304 instead of 316. Did 
we get the wrong ones from ITL? Did we 
swap them in Daresbury by mistake? Is it 
just an odd colour?


Installed turbo pump on top gate valve, 
Pirani gauge provided by ABD (where is 
ours?) and pumped down.

Reached 10-1 mbar in 10 minutes. Turbo on.
Reached 10-5 mbar on IE514 in 17 more 
minutes (where is its manual?)

Will leave pumping overnight.

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.

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.

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

(ELOG does not allow more pictures to be added to previous entry)

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.

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.

(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.