Sudden and unexpected power cut at 10:02 German time, affecting all the target hall.

It has been caused by the emergency alarm being triggered. Reasons unclear. Electricians were informed.

CARME top gate valve closed.

10:33 power is back

Set point 120C
Scroll on, turbo on (980 Hz normal operation), valve open
Pressure at 1.34E-6 mbar

No obvious issues.

13:00
Power appears back for the whole ring. 

Set point 128C
Turbo normal operation - no apparent adverse effects of shutdown
Pressure at ~3E-7 mbar

Pi can again be accessed by ssh. Vacuum plot is updating again. 

Current temperature ~130 C (on manual mode)
See plot and screen attached.

Current pressure ~6.08E-7 mbar
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Current temperature ~130 C (on manual mode)
See plot and screen attached.

Current pressure ~9.98E-7 mbar
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Current temperature ~130 C, was set to 130 C on manual mode around 10:00 am
See plot and screen attached.

Current pressure ~1.37E-6 mbar
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Current temperature ~120 C, increasing
See plot and screen attached.

Current pressure ~1.07E-6 mbar
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Current temperature ~87 C, increasing
See plot and screen attached.
Thermocouple on CARME foot side (1-4) may have come loose judging from sudden jump in temperature at 14:30?
Improvement to blanket seem to have significant effect.

Current pressure ~3.5E-8 increasing
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Additional baking jacket sections for the turbo section arrived today. Baking was halted at ~11:00 to allow for the chamber to cool to install new sections. New sections installed and baking restarted at 15:25. Jacket fits much better with gaps near the turbos and the motors now covered much better. Attached are some photos. 

While heaters were off, the pressure fell to ~3E-9 mbar and was continuing to fall before baking was restarted. 

Current baking temperature is ~75C and code is in automatic mode.

The NEG and motor controllers have been installed on the rack next to the chamber. See attached.  The bottom NEG controller is connected to the 4 D-2000 NEG-ion pumps. The cables for the D-2000s have kapton tape attached. The middle NEG controller is connected to the NEG pumps whose feedthroughs are on the chamber on the inside of the ring. One of the connections on the middle controller is for the 3 NEGs connected together oppose to the usual 2. This connection is marked by white tape. The top controller is connected to the feedthrough who are on the side of the chamber on the outside of the ring. 

Attached.

Current temperature ~102 C. Was set in the manual mode since last evening 18:54.
See plot and screen attached.

Current pressure 3.62E-7 
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Current temperature ~105 C
See plot and screen attached.

Current pressure 6.08E-7 
See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Current temperature ~87C

See plot and screen attached.
Note Baking code restarted yesterday evening.

Current pressure 2.1E-7 increasing

See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug
http://web-docs.gsi.de/~lestinsk/vacplot.php

Baking automatically stopped due to negative gradient in on thermocouple for 10 minutes straight. 
Not surprising giving we were baking at full power bu making little progress. We should have switched to manual
mode.

Switched to manual mode for now at 60 C to recover temperature without excessive gradients. 
Will restart automatic mode later today. Should be back to full power tomorrow morning.

EDIT
21:42 CET - Temperature stabilised. Restarted automatic mode.

Current temperature ~90 C
However note setpoint is at 102 C. It appears we are baking at full power, but too many heat losses?
Temperature gradient still increasing. May just be a matter of time.

See plots attached


Current pressure ~ 1.9E-6 mbar decreasing

See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug

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

Current temperature ~64 C

See plots attached

Current pressure ~ 2.5E-6 mbar

See
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?rtime=OK4kVZKB2Ug

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

The analog readout of the Combivac controller for the IE514 ion gauge has been set up, readings are plotted to http://web-docs.gsi.de/~lestinsk/vacplot.php. Readings and plot should be updated every minute.

Baking halted on 23/9/21 16:16 as connection to TC08 module was lost. USB cable connection to TC08 module appears to have been damaged in shipment. USB hub and cable replaced, connection re-established and baking restarted 17:27. 

Ramping of baking limited to 40C by the maximum difference between parts of the chamber being too high, this safety feature prevents high thermal gradients. Limitation caused by uneven heating due to placement of heating elements resulting in the gate valve end of the chamber being much cooler than the rest of chamber. The pressure increased to ~8e-7mbar at 40C due to increased outgassing. Baking stopped at 07:00 24/9/21, heating elements were repositioned and the baking jacket reassembled. Code recompiled to include the rate and temperatures limits from elog 76.

Baking restarted at 10:00

Fabre (German)       Color (English)

grau                         grey

blau                         blue

rot                            red

braun                       brown

weiss                        white

rosa                          pink

gelb/gruen                yellow/green

1. Connect to pi on CRYRING local network 
ssh pi@192.168.207.127

Password available on request


2. To check state of baking code

screen -x

please do not press any keyboard button if unsure how the code works. 
Pressing q instantly stops baking in case of emergencies

when done, to disconnect

CTRL+A 
d


3. To check log of commands / previous status of baking code

cd Programs/Baking
cat Log.dat


4. To check temperature plot

cd Programs/Baking
gnuplot Plot_temps.gp 

CTRL+C on terminal to quit

Please remember the Pi has limited computing power and the gnuplot window will consume some of that when open
One remote user is no problem, but multiple may give issues to the Pi


5. Check current pressure

Currently:
https://uoe-my.sharepoint.com/:x:/g/personal/cbruno2_ed_ac_uk/EVbsVOubNHRLj0PKiFIvd00BClMJ6WSJ1UDAyLA2F3R4jA?e=hEoZt7


(Pictures from webcam are in ~/Webcam on the pi
CM52 data also to be available online in real time soon)

CARME setup checked by vaccum group this morning. 

Both IE514 gauges de-gassed. To de-gas on the CM52 controller select the channel and hold the right arrow for two seconds. The reading will flash indicating the de-gassing procedure, this lasts for 2 minutes before completing. Flashing automatically stops once procedure finishes. Attached for convinience is the wire colour-pin assignment for the gauge head again.

Baking jacket fully assembled around CARME and baking code updated. Temperature and rate limits updated to match thermocouples around the chamber.

                        Max Temperature                Max Rate

Chamber                155C                               10C

Floating                  175C                              150C

Octagon (outside tent)  50C                           10C 

 Automatic baking started at 13:50, pressure was 1.69e-7 mbar

On 21/9/21 CARME was connected to the leak tester. Leak testing showed no apparent leaks, extra time required to reach <1e-4 mbar during initial turbo pumpdown might be due to outgassing from additional installed components on the chamber. Turbo pump restarted 

21/9/21 16:28    9.73e-7 mbar

21/9/21 16:48     8.92e-7 mbar

21/9/21  17:28    7.88e-7 mbar

elog 74 contains the pressure taken every hour after this point from the webcam. 

NEG and NEG-ion cables for controller modules connected to feedthroughs on the CARME chamber. Feedthroughs have been electrically checked and are OK.

CARME baking jacket constructed around chamber. Thermocouples in place around the chamber. Vacuum group are coming tomorrow morning to inspect and de-gas installed gauge, after they are finished we mount final pieces of baking jacket and begin baking.