Saved pressure reading and temperature data logs from internal target in /TapeServer/22Feb/OtherData

Leakage current data is saved in /home/npg/Programs/caenlogger

We need to connect the non-bakeable (max 80C) wire of the ion pump belonging to the vacuum division, and we also need to connect the two newly-repaired NEG cables to the D2000 modules. That requires partly opening the tent to gain access.

Set heaters temperature from 450 C -> 400 C - CARME floating TC temperature goes from ~98 C to ~88C.

Set heaters temperature to 350 C. Left to cool over lunch.

 Connected GSI vacuum division ion pump and IE514

Connected D-2000 upstream left/right with repaired cables

Flashed all ion pumps. Ion pump #4 was flashed a couple of times, but has now started arcing. The issue is not with the module - either the wire or the ion element are damaged.

Set heaters to 300 C. Left to cool a bit more overnight. Planning on NEG on tomorrow.

Found CARME at 50C, a bit cooler than expected, probably due to invasive tent changes yesterday to mount missing wires. Increased heaters temperature to 300C

9:35 Started D-2000 #1,3 (behind the DSSD). T=400, tramp 30, thold 90

11:20 Set D-2000 1,3 to 200C. Turned on D-2000 2,4 as above 

13:15 Set D-2000 2,4 to 200C. Turned on UHV1400 set 1 at 250W, tramp 30, thold infinity (will ramp down manually as required)

13:20 No appreciable effects on DSSD temperature. Turned on set 2 as well, which should be mounted close nearby.

13:45 Both sets reached 250W. No effects on detector temperature. Increased to 300W. Vacuum gets slightly worse, but recovers quickly. Not worth further increasing power. Leaving for 90 minutes.

15:20 Strain relief TC at 75C quite hotter than detector TC at 35C. Might be normal. Vacuum division IE514 must have been degassed remotely? Decreased set 1,2 to 75W. Turned on sets 3,4 to 250W as above. 

15:45 Sets 3, 4 now at 250W. Detector TC heating quickly at 13C/h but nowhere near dangerous temperatures yet. Decreased sets 1,2 to 50W. Leaving for 90 minutes.

17:15 Sets 3, 4 to 50W. Slightly worrying temperature difference between detectors and strain relief around 65C. Different materials and different positions could explain this.

17:40 Oddly, detector temperature now going up sharply (temperature diff. down to 40C) since the uhv1400 power was decreased. Cannot think of s logical reason,  it may just be a coincidence and heat transfer is catching up.

Leaving overnight. Will turn on the last two groups of UHV1400 tomorrow morning.

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.

Found CARME in XHV at 1.1E-11 mbar. Chamber temperature around 30C cooling slowly.

Closed GV to top turbo. Pressure goes up but appears to recover around 2.5E-11 mbar, on line with several previous observations that sectioning off the turbo results in a higher reading in the IE514.

Left turbo on. Remember to not turn it off when removing the tent.

10:40 - Status as attached. Heaters setpoint/read at 250 C, 150 C, 225 C. Power stable at 53%, 41%, 63%

10:45 - Informed HKR ramp down / pump activation is starting for CARME only. Setpoints to 200, 125, 200 C. Monitoring slow ramp down.

14:10 - Heater temperatures reached the set points. Power stabilising. CARME internals temperature dropped to around 100 C and still falling. Waiting until later today to further reduce heater setpoint. Will probably aim for 80 C before beginning activation.

15:45 - Heater setpoints to 175, 100, 175 C

15:50 - Interaction chamber jacket setpoints to 100C

18:00 -  CARME temperature decreasing, not stable yet. Will check later tonight.

20:43 - CARME internals around 85C, not quite stable still. Waiting overnight.

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.

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.

10:30 Found ADC#4 on aida 1 and 4 are suddenly noisy. See attach 1-2. Checkloaded multiple times - no effect.

Leakage current overnight was stable, but a clear transient can be observed yesterday around the times of the DSSD motion test. We did not observe this in the cave looking at the CAEN module - it might have been too fast.

Now reducing bias to 50 V and will check differences later. FEE temperatures OK.

10:50 Started DAQ. Rates are much higher in n+n strips, but p+n strips appear unaffected. See attach 4-5.

Stopped DAQ. Will leave 50V until after lunch.

11:27 Checked motor control status after yesterday's setup (see previous ELOG entry). See attach 6.

IN counters are respectively: read, increases, latch (left), latch (right)

Read is the number of pulses sent with the instruction to move. Increases is the number of times the instruction was considered. Latch on/off indicates the 1 s time interval during which commands sent to a motor arm (left or right) are considered double-firing or mistake, and ignored.

The number of increases is the same for move in/out - good!

The number of increases for move out is 1 unit less than move in - one double pulse / double command must have been received overnight and ignored.

Note torque on right arm is 2 (arbitrary units) which is unusually high and may indicate some tension in the kapton wires. No apparent effect on DSSD2,4 on that arm. Will not move for now.

13:24 FEE temperatures OK, leakage currents decreasing slighly.

13:41 Slowly increased bias to 100V. Interestingly it is now DSSD#4 (Ch#3) that displays the highest leakage current. Attach 7

13:45 Stats & Rates look rather similar to earlier this morning at 150V, but aida01 and 04 are quieter. Attach 8-9. Will leave at 100V for a while longer before moving to 150V.

15:20 Set bias to 150V

15:50 Nikos testing target. Started short run. Stats & Rates attached (10-11). Same as yesterday, aida01 and 04 ADC#4 no longer noisy.

V-I on attach 12-13. Legends unreliable!

17:00 Nikos completed target test. YR09 pressure around 3E-10 mbar with around 5E11 atoms/cm2 He target. Target not quite stable (10-20%), some optimisation required, but pressure holds at 3E-10 mbar for several minutes.

Beam on target will increase ring pressure. Can't test for now. Target tests without beam complete. Need to log all the data remotely. No logging available at present.

Leaving bias at 150V overnight. No run.

11:05

Confirmed overlap is at 4 mm under new settings.

For unclear reasons, the bottom-left detector is not seeing the halo anymore since around 10:00. Rutherford still visible and if the left arm is moved in the counts at 5 MeV become apparent.

l s by 20 mm, r p in -> 36.5 mm /  64.6 mm

Target thickness 3E11 atoms/cm2. Beam intensity few E7 at injection. Coasting beam mode.

Data rate x10 compared with earlier. Stats as before - the reason is unclear.

Temps & Merger OK. We should be able to tolerate these rates.

Moved detectors in/out to make sure we were not clipping the beam. A few seconds of data may be present in R41_9

11:30

Checkloaded. Detector 2 is now counting more.

Moved to run 42. No other changes.

13:00

Realised cooler voltage was being read via fault g35 divider. Beam stopped

15:00

Switched to F20. Beam back on. Moved to run 43

Electron cooler voltage = 243.155 V

Collector current = 4.29 mA

Beam energy was slightly off, will try again

07:00

After putting the target back, we observe strong periodic (5 s) fluctuations going from 3E11 to 5E12. The reason is unclear. One may warm up the target to solve this, but will ask Nikos later instead.

The target may be a bit too thick for our purposes, and the luminosity will vary greatly depending on injection vs. target fluctuations timing.

Rates OK. Temperatures OK. Merger OK.

System wide checks as before.

07:30

Moved detectors fully out to check elastic and signal rate in this configuration.

Half of DSSD BR was missing. Checkloaded. Solved.

Moved to run 48. Target still unstable.

08:23

Beam issues. Called HKR. Target out.

09:00

Still no beam. Increased target temperature to 29K from 28.5K. It seems the fluctuations disappeared.

Rates as before.

10:22

Beam might be back but people are checking the steerer. Target in. Started run 49. Detectors still out.

10:13

Some beam. HKR is still working on it.

Data rate up to 2 MB/s. Merger events merged matches. However Stats do not seem to have increased. This is the second time I observe this.

00:10

As run 89, detectors moved fully out.

01:20

TL detector noisy. Shook it. Fixed it.

Temps OK. Noise spike reported in Run 89 still there.

Target 6E11. Beam stable.

02:00

TL detector noisy. Shook it. Fixed it.

ELOG STOPPED WORKING

~ 2:00 17 June

Run 91

Attempted to move the detectors closer to the beam, and move them in sync with the injection.

Found best position was

Right arm: s by 5 mm, r p in (not moving). No benefits from moving. 10 mm + r p in on sync results in beam clipping during injection. 69.55 mm not moving.

Left arm: s by 5 mm, l p in (in sync with motion). Due to the short beam preparation time, only the trigger out was used as per screenshots below. 23.58 -- 67.90 moving.

Saw spike on leakage current for both detectors on the right arm. Unsure if this because they are being moved, or because they were hit with beam. Leakage current recovered.

Run 92 - acquired data as above.

Rutherford locus more clear on left arm detectors. No clear sign of nuclear reactions signals.

04:00 17 June

Moved the detectors back to the usual configuration (as per run 89).

Moved target away - background run.

Some issues with run numbers - see attached run name R93, but run 94 is written. See attached. 93 and 95 contain data. 94 does *not* exist.

No obvious differences wrt. target run, except Rutherford.

19:08

Beam energy = 3 MeV.

Horizontal beam position = 4.0 mm, vertical beam position = 0.0 mm.

Target density ~ fluctuating

Beam intensity at inj ~ 1.7e7

Detectors are positioned IN. Left arm = 36.54, right arm =  64.60 mm

MBS signals saved from motors code

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 6 minutes.

Pressure in YR09 E target ~ 4.36e-11 mbar.

Merger error recovered

White rabbit time stamps

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

21:27

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

23:00

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Statistics attachment 5

Merger attachment 6

00:42

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Density is oscillating between E10 and low E11.

attachment 7 is statistics, attachment 8 is temperature, attachment 9 is merger, attachment 10 is spectrum browser.

02:20

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Density is oscillating between E10 and low E11. ( last 15 minutes below 2E10)

attachment 11 -13

From 2:00 target density falls below 2E10 and started decreasing to the E9 range. At 2:40 we started playing with x-y to get to higher density. At 3:30 we are at 5/6E10 and waiting to see if it stabilizesto that or if it needs more playing.

04:06

Target density being 1-2E11 since 5 minutes

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Attachment 14 statistics, attachment 15 merger

05;53

Target density 1E10, sometimes e11, before going down to low E10 and we need to play a bit with x-y to recover it

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Attachment 16-18

07:35

Target density 2.5E11, after changiny y position to 1000

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

09:00

Target density has not improved despite efforts last night. Mid 10 - low 11 density range. We have asked HKR to remove beam from the ring and allow access so Nikos can change the nozzle.

Beam off now, access granted. Will begin warming nozzle. Internal cave work on changing nozzle expected to start at 11

Run stopped.

Final monitoring code histogram attached

16:26

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Nicos came in to optimize target density.

18:39

aida02 in the MERGER aka aida03 elsewhere has a red background, but still appears to be transferring data. Rates are fine. Temps are fine. System wide checks unchanged.

See attachments. Checkloaded x2 - no difference. Unclear what the issue is.