At 00:37 we lost the beam due to a high pressure burst in the tarjet which resulted in a valve closed at YR09VV...

On-call service technicians are coming to solve the problem.

Screenshots of all NewMerger statistics

To include alll 16 FEE modules in the NewMerger we edited the file /MIDAS/DB/EXPERIMENTS/MERGE/Options/carme-gsi from MERGE.LinksAvailable string 5 to MERGE.LinksAvailable string 15

We also edited the file /MIDAS/Linux/startup/NewMerger from ./master64 -i 8 -l 16 -p 11001  & to ./master64 -i 16 -l 16 -p 11001  &

We have started the Merger and tape server. The merger settings were 'corrupted' and did not display xfer Links => Merger. We implemented a fix from https://elog.ph.ed.ac.uk/DESPEC/36 and this resolved the issue.

We started the tape server, merger and go on the run control. We observe the merger working and data links to the tape server. A new file is created each time but we observe no data being written to that file. After 5 minutes of no data being written the merger crashed and the fees crashed soon after. We will leave until tomorrow to resolve.

Issue subsequently resolved see elog https://elog.ph.ed.ac.uk/CARME/487

21:00

Target is lost. Background run is being collected.

New run 72 - beam on target with definite target overlap [coasting]

Cooler voltage setpoint 247.3 V.

FC20 read value 246.75 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm18:00

FakeMotion script running

horizontal beam position 1.0 mm (new beam target overlap)

vertical beam position  -5mm

Beam intensity 6e+7 particles.

Target density ~3e9 at/cm2

Target temperature is 90 K. Values of E1 is 820 Hz, 2.6A, 4.2e-2 mbar

Aida03 detector T is stable.SCreenshot is attached.

22:27

Cooling fixed. Temps OK.

Beam issues due to too long storage time in the last hours. Motors moved out and not moving.

Decreased storage time to 70 s. Seems OK now. Restarted motor movement as before

Started new run R86

Neg and ion pump cables were labeled and connected.

Kapton tape wrapped around the neg cable connectors for the strain support.

Lower frame mounted.

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.

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.

Internal neg installs completed and electrically checked. 

4/6 of the neg feedthroughs installed. Continuity between the power pins, ground pin and the chamber has been checked, we observe 5-10 ohms between the power pins similar to previous checks on the heaters. Also attached are the crimps for the ground tag and feedthrough connector pins.  

Neg and Neg-Ion pumps have been connected up to the control modules. Controller on the right is connected to the D-2000s. Middle controller is connected to the wall section negs (1x2negs in series and 1x3negs in series) and the moving detector negs (2x2 negs in series). Left controller is connected to the intermediate section negs (2x2 negs in series). Must connect IN/OUT interface on the back of the controller or the alarm for an open circuit is triggered. When no thermocouple is connected Tmax must be set to zero otherwise the thermocouple alarm is triggered.

13:00 Pressure on chamber= 6e-9mbar

13:55 I have begun ramping up the middle controller. Ramp time is 45 minutes, slightly longer than the recommended 15-30 mins in the manual to see how well vaccum reacts.  Controller will hold maximum power for one hour for activation. Controller has 4 outputs, one for each neg cable. Outputs 1-3 are the 2 negs in series, output 4 is the 3 negs in series. Parameters for outputs 1-3 are; Vmax=100V, Imax=5A, Pmax= 400W. Parameters for output 4 are; Vmax=110V, Imax=5A, Pmax=600W. 

14:05 Pressure chamber = 1.92e-6mbar. Power per output is 60, 78, 79, 87 W. 

14:15 Pressure chamber = 2.4e-6mbar. Power per output is 114, 148, 150, 168 W.

14:25 Pressure chamber = 1.44e-6mbar. Power per output is 201, 261, 264, 300W.

14:35 Pressure chamber =  1.12e-6mbar. Power per output is 305, 398, 397, 466W

14:56 Pressure chamber = 1.52e-6mbar. Negs are on max power and are holding for an hour.

15:45 Intial activation completed. Negs have been set to half power to maintain temperature at ~200-250C. Parameters set for outputs 1-3; Vmax= 50V, Imax=5A, Pmax=200W. Parameters set for output 4; Vmax=70V, Imax=5A, Pmax=300W. Pressure on the chamber is now 4.4e-8mbar. The pressure tomorrow morning should tell us if the activation has been successful, afterwhich I will activate the next lot of negs. Average vessel temperature is now 146C. I believe our 'internal thermocouple' isn't reading the internal temp after all and is just the temperature of the bottom feedthrough flange, as its temp maxed out at 175C and followed a similar gradient to the other vessel thermocouples.  See attached temperature plot.

20 October

08:30 Pressure on the vessel = 2e-8mbar. Pressure hasn't dropped significantly probably due to negs maintaining a temperature of 200-250C causing significant outgassing. Chamber temperature has maintained at 145C so outgassing from chamber will also have increased also. 

08:45 2nd set of negs activated. Intermediate chamber negs activated (2x 2 negs in series) which are connected to outputs 3+4 on the left controller. Parameters for outputs; Vmax=100V, Imax=5A, Pmax=400W, Rise time= 30mins, Hold = 60mins. 

First set of negs remains at half power. 

Pressure on the vessel =8e-8mbar

08:55 Pressure on vessel = 1e-6mbar. Outputs; V=74, 74W I=2.2, 2.2A P=79, 79W

09:05 Pressure on vessel = 2.2e-7mbar. Outputs; V=58,58V I=3,3A P=175,175W

09:10 Pressure on vessel = 3e-7mbar. Outputs are; V=79,79V I=3.7A P=300,300W.

09:20 Pressure on vessel = 1.2e-6mbar. Outputs are; V=100V, I=4A, P=400W. Negs are now on hold for the hour activation. Chamber temperatures are stable at ~145C still

10:45 Negs are being held at half power to maintain temperature. All that is left is the D2000's on Thursday. Pressure in the vessel is staying constant at ~8e-8mbar. Chamber temperatures ae stable at ~145C. 

Test of NIM WR source at Edinburgh

Attachment 1 - NIM WR source

NIM module upper SMA - DSO ch 1
NIM module lower SMA - DSO ch 2

Attachment 2

NO SYNC or CLK signals observed.

Noise observed with NIM bin power ON *and* OFF

Attachment 3

NIM WR source in EG&G Ortec NIM bin



... and with the Digilent Zybo board switched ON!


Attacments 4-7
Trigger ch 2
4, 40, 400 & 4000ns/div

Attachment 8
Trigger ch 1
4ns/div

Kapton cabling and the broken ceramic detector holder have been separated. Required holding jacking plate in a vice and using lots of propanol to wet the jacking screw. A long set of kapton cabling has been removed from the other side of the chamber which can be used when mounting the detectors. The feedthrough flange was re-mounted on that side with no kapton cabling. 

The wiring for the NEG feedthroughs was in confilct with detectors in previous position. Feedthroughs have been moved to the DN40 flanges at the top and bottom of the chamber section. In order to wire the NEGs to the feedthroughs required rotating the NEGs one position anti-clockwise and re-wiring some of the connections. 

Left two Getters are connected in series and are connected to the top feedthrough. The two right and the bottom getter are connected in series and are connected to the bottom feedthrough

Repaired Neg wires for D2000 with Oemer's help.

Cable #2 is fine. 

In Cable #4, wires 1 and 2 are swapped but it's impossible this happened when the connector came apart. The pins are crimped and secured with a screw. Most likely it was sold like this and there's no difference between wire 1 and 2 (same voltage).

Edit: SAES confirmed 1&2 are interchangeable.

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.

08:20 Temperature of channels 1-3 and 5-6 were reduced to 120 degrees. Immediately after, the conditioning of the NEGs was stopped and D2000s ion pumps were flashed 5 times. The temperature of the gas jet target and the electron target channels was reduced to 120 degrees.

11:00 Started activation of D2000 following procedure in ... at T=400 C for trise 30 min + thold 90 minute. After activation, NEG elements are left at 200 C to maintain cleanliness. Temperatures increasing, but still well below safety margins.

16:00 Started activation of NEGs from channel 1 at 200 W. No effects on temperatures. Activated channel 2 as well. No significant effects. Increased activation power to 250 W. No issues

16:30 Given temperatures are still low decided to activate 3 and 4 with 230 W (Vs. 150 W last time). Ok for 30 minutes then temperature starts increasing a bit too quickly. Decreased to 200 W. Ok.

18:45 Activation all NEGs on middle module complete. Left overnight to stabilise / cool.

21:00 Channel 6 of the heater stops responding properly. ML asked HKR to disable. No effects on temperatures.

Found temperatures and pressure stabilised overnight. See attached.

12:00 Began activation of 3x UHV1400 in channel 2, top module. Started using 90 W as per procedure. No effect on temperature. Increased to 120 W. OK

14:30 Began activation of 2x UHV1400 in channel 1, in front of the detectors. Considered moving detectors but decided against it since bellows are rated to move at 20C at most. Activated at 60 W (vs. 75 W in procedure). OK

All NEG elements off. CARME heaters ramping down to 60 C overnight. 

Ion pumps activated < 100 C. Valve closed. #4 doesn't come online properly. Sone issues with #2 as well but it recovered on its own. Left cooling down. No changes. Ion pumps off and valve open. Will try tomorrow. Could be faulty cable?

Vacuum division may want to activate their pump as well - times unclear.

09:40 - Found temperature and pressure stablised, but too high to comfortably activate NEGs closest to detectors. Detector temperature around 90C. This was expected. Ramped down UHV1400 #1,2,3,4 to P=50W (200C?). Ramped down heaters to 100, 80, 100C. Ramped down heating jacket to 60C.

10:00 - Activated set #5 (x2) at 80W tramp=30, thold=infinity; set#6 (x3) at 120W rest as #5. This is different from previous procedure because we have 4x DSSD but sensor only one one of them. It seems less dangerous to heat up everything at once so that the one TC we have is hopefully representative of the situation.

10:15 - CARME cooling. No visible effects on temperature. Tried P#5 100, P#6 150 W. (500C roughly?) Will probably have to decrease.

10:25 - Detectors getting hotter quickly, but still below 100C. No changes for now.

10:35 - As expected, detectors are getting too hot, too quickly. Decreased power to 60, 90 W

10:43 - Ramped down #5,6 to 40, 60 W. Should be around 200C at equilibrium.

10:45 - Also decreased #1,2,3,4 to 40W, and D2000 to 150C.

10:52 - Further decreased #5,6 to 10, 15W.

11:04 - Temperature back under control

11:10 - Detectors actually cooling now. Increased #5,6 to 20,30 W.

11:18 - Detectors still cooling. Increased #5.6 to 30,45W. If stable plan to leave like this until later this afternoon.

13:23 - Temperatures stable. Increased #5,6 to 40, 60 W. Decreased heaters to 80,80,80 C. Decreased jacket to 40C. Opened the tent partly to connect the vacuum division non-bakeable ion pump cable.

13:35 - Ion pump cable connected and tent closed as best I can. Interestingly, the pressure is going up probably as a result of the detector/kapton cables temperature going up due to the slight increase in #5,6 power.

14:15? - Graziano S. flashed the vacuum divison ion pump.

14:25 - Pressure keeps increasing slightly. I am taking this as a sign the kapton is outgassing, which is being made to out gass which is good. Decided to leave temperatures as they are until later today and start cooling down in the late afternoon / evening. Decreased slightly #5,6 to 34, 51W. Increased D2000 to 200C. Will leave like this if stable.

15:00 - Looks stable. See attachment 3. Leaving for a few hours, before proceeding to gradual cool down overnight. Will ask Jan for help in turning everything really off.

18:00 - All NEGs off. All apadev 10&11 channels to 40C. Ion pumps remain off. Asked JG to come tomorrow late morning and turn the apadev channels off and the ions pumps on.

9:00 - Michael's online vacuum pressure plot is no longer working - an old image is being displayed. CARME temperatures around 80-85C. Lowered heater temperatures to 150, 100, 150 C for safety. Lowered jacket temperature to 80C

9:15 - Flashed ion pumps several times. Small pressure increase, up to ~7E-9 but not macroscopic

9:30 - Started D-2000 #1,2. T=400, tramp 30, thold 90 (this was a mistake 1,3 are behind the detectors, 2,4 are to the side. They should ideally be activated together. Got confused. Not a big deal.)

9:50 - Online vacuum plot is working again. Pressure changing, internals around 80C

10:00 - Internal temperature still stable at 80C. Started D-2000 #3,4. T=400, tramp 30, thold 90

11:30 - For unclerar reasons the pressure has been increasing over the last half hour, after the four NEGs were activated. Nikos and the alignment group were adjusting the feet of the interaction chamber to improve the alignment. Hopefully this is not a leak. Section 10 was apparently vented overnight, and may be in air at the moment.

11:45 - D2000 activation complete. Set temperature to 200C for all four of them. Altough the temperature is still >375C, the pressure drops very quickly. This is good, but I have not observed this behaviour before.

13:10 - Pressure and temperature mostly stable. Turning on UHV1400 groups #1, 2 with at P=250W, tramp 30s, thold 90s.

13:35 - No effect on DSSD temperature. Increasing P->300W as per previous activation procedure.

13:43 - Still no sizeable effect. Increased P->350 W

15:00 - Completed activation of UHV1400 sets #1,2. Set power to 100W. Activated sets #3,4 at P=250W, same settings as other two.

15:30 - Increased UHV1400 #3,4 to P=300 W. Temperatures OK.

15:37 - Increased UHV1400 #3,4 to P=350 W. Temperatures increasing but still acceptable.

16:06 - Temperatures are starting to get a bit too high. Decreased P->300W. Also decreased heaters to 125, 80, 125C and baking jacket to 70 C.

16:26 - Decreased UHV1400 #3,4 to P=250W.

17:05 - Completed activation of UHV1400 sets #3,4. Set power to 100W. Planning to leave stabilising overnight.

9:10 Set heaters temperature 300 -> 250 C in preparation for cooling down and to help keep DSSD temperature down. Started activating set 6 (3 X DSSD) at 120 W as per previous procedure.

9:15 Realised previous choice is a mistake in the current configuration as the DSSD TC is closer to set 5. Set 6 off. Set 5 to 60W. No effects in temperature. Ramped slowly to 200W. No immediate effect in temperature, while vacuum goes up.

9:30 Started activating set 6 at 300W (=100 per module). This should give us the best feedback on DSSD temperature from the only TC we have since they should all be at similar temperatures. 

9:40 DSSD TC shows temperature decreasing rapidly (-17C/h). That's nonsense. The TC cannot be working properly, which means activation is now quite dangerous. Looking at strain relief TC instead from now, which is still at 85C. Set 5 down to 30W for safety while set 6 finishes ramping up.

9:45 DSSD TC still reading nonsense at 35C cooling by 20C per hour. Strain relief TC at 85C heating up by 10C per hour is more realistic. Vacuum worsening as set 6 reached 300W. Immediately ramped down to 120W. Leaving for 30 minutes, or less if strain relief temperature increases too much.

9:57 Strain relief heating quickly at 90C. Decided to turn off ALL negs for safety. Set heaters to 200C.

10:18 Strain relief temperature finally slowing down heating rate. DSSD TC beings displaying increasing temperature. The TC wire on the TC-08 module is clearly damaged.

After lunch, turned on the four ion elements of the D-2000. Pump#4 is not working, and apparently module #2 also has issues. Used module #4 on pump#2 to get three working pumps. Others will have to be investigated when the tent is removed and we can have some access to the pumps.

Tried closing gate valve to turbo. Vacuum does not seem to really improve. Opened. Will try again tomorrow morning.

Vacuum division ion pump on as well.