DSSD off

FEEs off

Motors out, pin inserted, compressed air closed, power removed from motors box.

Motors and temperature logs are in carme-gsi:logs/G22-200

Next experiment will install new setup attached to gas target. Some baking and vacuum operations required. Everything should stay off for safety until they are done.

Run 101: no target. See ELOG entry by TD.

Run 102: ??

Run 103: ??

Run 104: After experiment time is over, Gleb tests beam lifetime at "high energies". Some data acquired for 30 minutes.

Run 105: Quick pulser walkthrough. People are working near CARME. Positive polarity 1000-9000 amplitude.

10:21 June 17

New energy: 1.125 MeV/u

Target in. Run 98 started.

Run 99 overlap check.

Run 100 back to acquisition as run 98.

Run 96 - as run 89, while we wait for beam energy change at higher energies

Run stopped around 08:56 June 17

Run 97 - target out, beam optimisation for higher energies.

23.18 DSSSD bias & leakage current OK - attachment 1
      FEE64 temps OK - attachment 2
      ADC data item stats attachment 3
       aida01-aida04 c. 250k
      per FEE64 1.8.W spectra - 20us FSR - attachments 4-5
       large transients aida01-aida04
      per FEE64 Rate spectra - attachment 6
      Merger, TapeServer etc. - attachments 7-8
        data file R101_15
      DSSSD energy spectra (updating) - attachment 9
      DSSSD bias & leakage current log - attachment 10
        transients bottom & top left c. 02:00 18.6.24


      cycle slow comparator 0x32 -> 0x64 -> Check ASIC Control -> 0x32
        aida01 - aida04 rates return to normal

      ADC data item stats - attachment 11
      DSSSD energy spectra - attachment 12

23.40 cycle slow comparator 0x32 -> 0x64 -> Check ASIC Control -> 0x32
        aida01 - aida04 rates return to normal


00.10 cycle slow comparator 0x32 -> 0x64 -> Check ASIC Control -> 0x32
        aida01 - aida04 rates return to normal

01.43 ADC item stats OK - attachment 13
       FEE64 temps OK - attachment 14

04.43 ADC data items stats
       ADC data item stats - attachment 15
       FEE64 temps OK - attachment 16
       cycle slow comparator 0x32 -> 0x64 -> Check ASIC Control -> 0x32
        aida01 - aida04 rates return to normal
       ADC data item stats - attachment 17
       per FEE64 Rate spectra - attachment 18
       Merger, TapeServer etc. - attachment 19
        data file R101_51

07.00 FEE64 temps OK - attachment 21
      ADC data items OK - attachment 20
      Merger, Tape Server OK - attachment 22

      DSSSD bias & leakage current - attachment 23

      DAQ stop, close data file
      DSSSD bias OFF
      FEE64 power OFF
         

Gzip'ing all uncompressed data files

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.

~ 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.

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

17:20

(Run 87 Junk and Run 88 does not exist)

Beam charge state set to 5+. Energy is ~1.06 MeV/u

Cooler voltage setpoint 590.3 V.

FC20 read value 589.07 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 3.5 mm (new overlap position with new beam)

vertical beam position  0.0 mm

Beam intensity 7.0e+6 particles.

Target density ~5e11 at/cm2

Beam is stored in the ring for ~20 seconds. From beam overlap tests ~ 75% of the beam is destroyed in this time.

Beam halo appears slightly reduced. This may be due to reduced intensity and reduced injection rate (20 s vs 5s previously)

18:00

FEE64 temperatures OK

ADC data item stats OK

per FEE64 Rate spectra OK

Beam intensity 1.17e+7 particles

Target density ~5.25E11 atoms/cm2

20:28

FEE64 temperatures OK

ADC data item stats OK

per FEE64 Rate spectra OK

Beam intensity 1.08e+7 particles

Target density ~3.84E11 atoms/cm2

23:58

Temps OK. Stats OK. Merger OK. Write to disk OK.

Waveforms attached.

Beam keeps going away due to "solenoid" issues.

On-line analysis screenshots attached.

Without beam, we see a clear noise spike in all detectors every 50-200 seconds randomly. This is *not* correlated with beam injection or dump.

Checkloaded - no effect. Beam back - no changes.

07:00

We are changing to 5+ beam so that we can access higher energies and possibly observe a higher lying, wider resonance.

Beam energy change to 1.06 MeV/u.

Detectors out

Target nozzle out

Pressure in E1 had reached 2e-1 mbar and turbo was spinning down to 810 Hz. Pressure reduced and E1 has reduced to 8.2e-2 mbar. We may require a pressure increase when we want the target back?

Run changed and out into no storage mode so we do not write rubbish to disk.

11:34

Beam tuning in the ring in progress

Merger OK. Not writing to disk.

Temps OK. Rates OK.

Leakage current OK.

Motors out. Target out.

13:31

Checks OK. Beam tuning near completion.

Some data acquired during beam tuning attached.

06:50

No sign of the resonance during night shift. New run started but when operators are avaiable we will likely move to higher energies to try and observe the (p,a) reaction.

Cooler voltage setpoint 247.8 V.

FC20 read value 247.25 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 1.0 mm

vertical beam position  -5mm

Beam intensity 7.0e+7 particles.

Target density ~5e11 at/cm2

05:00

Cooler voltage setpoint 247.45 V.

FC20 read value 246.9 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 1.0 mm

vertical beam position  -5mm

Beam intensity 7.0e+7 particles.

Target density ~5e11 at/cm2

Target temperature is 38.6 K. Values of E1 is 819 Hz, 2.7A, 1.85e-1 mbar

All checks OK

03:00

Cooler voltage setpoint 247.7 V.

FC20 read value 247.15 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 1.0 mm

vertical beam position  -5mm

Beam intensity 7.0e+7 particles.

Target density ~5e11 at/cm2

Target temperature is 38.6 K. Values of E1 is 820 Hz, 2.7A, 1.8e-1 mbar

All checks OK

03:34

Noise increase in top left dssd. Servo motor moved to resolve issue.

01:00

Cooler voltage setpoint 247.6 V.

FC20 read value 247.05 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 1.0 mm

vertical beam position  -5mm

Beam intensity 7.0e+7 particles.

Target density ~5e11 at/cm2

Target temperature is 38.6 K. Values of E1 is 820 Hz, 2.7A, 1.7e-1 mbar

All checks OK

02:50

Noise increase on dssd top left. Moved servo  motor to resolve issue.

23:38

Cooler voltage setpoint 247.5 V.

FC20 read value 246.95 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 1.0 mm

vertical beam position  -5mm

Beam intensity 7.0e+7 particles.

Target density ~5e11 at/cm2

Target temperature is 38.6 K. Values of E1 is 820 Hz, 2.7A, 1.7e-1 mbar

All checks OK

23:10

Beam set to bunched mode to observe beam lifetime. 

Electron cooler voltage setpoint kept at 246.8 V. Note this is 0.5 V lower than the previous test where the setpoint was 247.3 V

This corresponds to ~13.5 keV in the beam energy.

Attachment 1 shows target scan. Maximum still observed at a horizontal beam position of 1.0 mm.

Moving 0.5 V up or down does not impact the orbit enough to shift the beam position off the target.

Beam lifetime off target seems larger than previous, perhaps better vacuum conditions?

Back to coasting beam

20:00

Ecooler setpoint 246.8

Readout 246.25

Collector current 4.3

Target density ~5.3E11

Beam intensity 7E7 ions

14:51

Ecooler setpoint 246.9

Readout 246.35

Collector current 4.3

Target density 4.6E11

Beam intensity 8E7 ions

Shook left arm to fix it.

15:32

Right half on BL detector was not counting. Checkloaded. Fixed.

17:20

Moved left arm out/in to fix it.

Reduced temperature to 38.5 K in steps as the target density was declining.

E1: pressure: 1.57E-1 mbar, turbo frequency: 819  Hz

Target density: 1.5E11 atoms/cm2; Ion beam intensity: 6E7 particles (went down slightly, have not been able to get everything back)

DSSSD bias & leakage current OK 
FEE64 temperatures OK 
ADC data item stats OK 
per FEE64 Rate spectra OK 

19:50

E1: pressure: 1.61E-1 mbar, turbo frequency: 819  Hz

Target density: 1.5E11 atoms/cm2; Ion beam intensity: 7E7 particles (recovered slightly)

DSSSD bias & leakage current OK 
FEE64 temperatures OK 
ADC data item stats OK 
per FEE64 Rate spectra OK 

Target clogged?

Run 77 started at 06:48

Cooler voltage setpoint 247.0 V.

07:05

DSSSD bias & leakage current OK - attachments 1 & 2

FEE64 temperatures OK - attachment 3

ADC data item stats OK - attachment 4

per FEE64 Rate spectra OK - attachment 5

Beam intensity 8.45e+7 particles

Target density ~5.34E11 atoms/cm2

09:02

DSSSD bias & leakage current OK - attachments 6 & 7

FEE64 temperatures OK - attachment 8

ADC data item stats OK - attachment 9

per FEE64 Rate spectra OK - attachment 10

Beam intensity 7.85e+7 particles

Target density ~5.29E11 atoms/cm2

11:00

DSSSD bias & leakage current OK - attachments 11 & 12

FEE64 temperatures OK - attachment 13

ADC data item stats OK - attachment 14

per FEE64 Rate spectra OK - attachment 15

Beam intensity 8.5e+7 particles

Target density ~6.1E11 atoms/cm2

13:00

DSSSD bias & leakage current OK - attachments 16 & 17

FEE64 temperatures OK - attachment 18

ADC data item stats OK - attachment 19

per FEE64 Rate spectra OK - attachment 20

Beam intensity 8.2e+7 particles

Target density ~6.1E11 atoms/cm2