15:45

New run 71 - 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 7.0e+7 particles.

Target density ~4e11 at/cm2

Target temperature is 36.6 K. Values of E1 is 820 Hz, 2.6A, 1.4e-1 mbar

16:36

No difference observed between bunched and coasting

See attached screenshots to compare to previous run

Saw an increase in the data rate to disk ~ 2000 kB/s. On spectrum browser we saw aida15 had HEC reading hot. ASIC check on aida 15 resolved issue

18:00

Beam intensity 6e+7 particles.

Target density ~6e11 at/cm2

Target temperature is 36.6 K. Values of E1 is  820 Hz, 2.7 A, 1.5e-1 mbar

Aida03 detector temperature is 66 degree.

20:00

Beam intensity 6e+7 particles.

Target density ~6e11 at/cm2

Target temperature is 36.6 K. Values of E1 is  820 Hz, 2.7 A, 1.6e-1 mbar

Aida03 detector temperature is 63 degree. Screenshot is attached.

21:00

arget densityis dropped drastically. A temperature is ncreased signifiantly.

Beam intensity 6e+7 particles.

Target density ~2.7e9 at/cm2

Target temperature is 9 K. Values of E1 is  820 Hz, 2.7 A, 4.2e-2mbar

Aida03 detector temperature is 63 degree. Screenshot is attached.

14:45

New run 70 - beam on target with definite target overlap

Cooler voltage setpoint 247.3 V.

FC20 read value 246.75 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

FakeMotion script running

horizontal beam position 1.0 mm (new beam target overlap)

vertical beam position  -5mm

Beam intensity 7.0e+7 particles.

Target density ~6.3e11 at/cm2

Target temperature is 36.6 K. Values of E1 is 820 Hz, 2.6A, 1.4e-1 mbar

All system checks OK, data rate is ~ 260 kB/s. Statistics attached.

xy and energy histograms following ~20 mins attached.

15:45

I realised we have been running in bunched mode not coasting as we have been previously.

See attached screenshots (4-7) of last 1 hour of running. We will move to coasting.

Frank has been tuning the beam since 08:00

detectors moved fully out

11:20

New run (R68) started at 11:20. Put into no storage mode as rates are high during beam tuning. Cut off the end of last nights run when analysing

System checks OK

13.20 DSSSD bias & leakage current OK - attachment 1

FEE64 temperatures OK - attachment 2

ADC data item stats - attachment 3

per FEE64 1.8.W spectra - attachments 4-5

per FEE64 Rate spectra - attachment 6

 aida16 producing HEC data - Chck ASIC load to fix

TapeServer - no storage mode

13.35 aida01-aida04 c. 250k ADC data items/s - will await completion of current beam/target scan to fix by cycing Left DSSSD motion

14.00 CB cycles Left DSSSD motion to fix aida01-aida04 rate issue

CRYRING vacuum & hall temprature - attachments 7-8

14.28 New run data file G22-201/R69

Beam/target overlap optimised - details to follow

Run 67

00:01

      DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats OK - attachment 3

      per FEE64 Rate spectra OK - attachment 4

           Beam intensity 5.7E7 particles

           Target density - 4.98E11 atoms/cm2

02:01

      DSSSD bias & leakage current OK - attachment 5

      FEE64 temperatures OK - attachment 6

      ADC data item stats OK - attachment 7

      per FEE64 Rate spectra OK - attachment 8

           Beam intensity 5.8E7 particles

           Target density - 4.39E11 atoms/cm2

04:00

      DSSSD bias & leakage current OK - attachment 9

      FEE64 temperatures OK - attachment 10

      ADC data item stats OK - attachment 11

      per FEE64 Rate spectra OK - attachment 12

           Beam intensity 4.1E7 particles

           Target density - 3.57E11 atoms/cm2

06:00

      DSSSD bias & leakage current OK - attachment 13

      FEE64 temperatures OK - attachment 14

      ADC data item stats OK - attachment 15

      per FEE64 Rate spectra OK - attachment 16

           Beam intensity 3.7E7 particles

           Target density - 3.89E11 atoms/cm2

08:00

          The orbit adjustments started. The detectors moved out. One of these showed rates of about 20kHz. but after moving it in and out again it returned to normal.

11:00

      DSSSD bias & leakage current OK - attachment 17

      FEE64 temperatures OK - attachment 18

      ADC data item stats OK - attachment 19

      per FEE64 Rate spectra OK - attachment 20

           Beam intensity 4.9E7 particles

           Target density - 5.27E11 atoms/cm2

22:05

The energy is changed to 247.4 V.

Read back value is 246.849 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

horizontal beam position 8.75 mm

vertical beam position  -5mm

Beam intensity 4.0e+7 particles.

Run is R67. Target temperature is 36..6 K.

Values of E1 is 820 Hz, 2.4A, 8.69e-2 mbar,  2.55e+11/cm2. The pressure is slowly increasing since this afternoon. The recent value is E1 is 820 Hz, 2.4A, 9.0e-2 mbar,  3.28e+11/cm2

Systen checks all OK

Attachments

13.39 DSSSD bias & leakage current OK

FEE64 temps OK

ADC data item stats OK

per FEE64 Rate spectra

Merger, TapeServer et

 data file R65_11

DSSSD bias & leakge current log

CARME DSSSD motion control

15.45 Start data file G22-201/R66 
      Beam/target overlap test

10:47

The energy is changed to 247.4 V.

Read back value is 246.849 V.

Right arm at 64.60 mm

Left arm IN at 36.54 mm

MBS working - hopefully

horizontal beam position 8.75 mm

vertical beam position  -5mm

Beam intensity 3.0e+7 particles.

e-cooler export controls before/after energy change - attachments 1 & 2

New run is R65. Target temperature is 37.6 K.

Values of E1 is 820 Hz, 2.12A, 6.01e-2 mbar,  2.8e+11/cm2

12:34

Systen checks all OK

Target density stable at ~1.5e11 at/cm2

E1 = 6e-2 mbar, turbo is fine

13,38 CB reboots RHS CRYRING control computer (atppc017) - appears to be a now unavoidable system update/reboot

13.39 DSSSD bias & leakage current OK - attachment 3

FEE64 temps OK - attachment 4

ADC data item stats OK - attachment 5

per FEE64 Rate spectra - attachment 6

Merger, TapeServer etc - attachments 7-8

 data file R65_11

DSSSD bias & leakge current log - attachment 12

CARME DSSSD motion control - attachment 13

13.42 E1 turbo 820Hz 2.2A 5.2e-2mbar

Target 3.45e+11/cm2 T1 36.6K

Beam c. 3e+7

15:20

Stats OK. Temps OK.

Merger OK. Write to disk OK.

07.22 E1 pump 799Hz, 2.8A, 2.6e-1 mbar, 4.8e+11/cm2

07.24 DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats OK - attachment 3

      per FEE64 Rate spectra - attachment 4

      per FEE64 1.8.L spectra - attachments 5-6

      per FEE64 1.8.W spectra - 20us FSR - attachments 7-8

      Merger, TapeServer etc - attachments 9-10
       data file G22-201/R64_11

      DSSSD bias & leakage current log - attachment 11

      CRYRING hall temperature log - attachment 12

      CARME DSSSD position controller - attachment 13

07.57 all histograms zero'd


07.58 E1 pump 794Hz, 2.8A, 2.6e-1 mbar, 3.1e+11/cm2
08.55 E1 pump 785Hz, 2.8A, 2.74e-1 mbar, 4.8e+11/cm2. Therefore, the temperature is changed from 38.8 K to 38.4 K. Values of E1 is changed to E1 pump 782Hz, 2.7A, 2.95e-1 mbar, 6e+11/cm2
09.15 The temperature is further changed from 38.4 K to 38.0 K.  
09.25 Values of E1 is changed to E1 pump  780 Hz,  2.79 A,  3.0 e-1 mbar,  5.87 e+11/cm2
09.35 Values of E1 is changed to E1 pump  779 Hz,  2.79 A,  3.1 e-1 mbar,  2.07 e+11/cm2
09.45 Values of E1 is changed to E1 pump  778 Hz,  2.75 A,  3.0 e-1 mbar,  4.6 e+11/cm2
10.00 Values of E1 is changed to E1 pump   776 Hz,   2.78 A,  3.05 e-1 mbar,  5 e+11/cm2

Intervention by Uli. Reduced H2 regulator to c. 12 bar. Briefly opened exhaust to hasten recovery.

10.13 E1 820Hz 2.3A 7.7e-2mbar c. 2e+11/cm2
10.34 E1 820Hz 2.1A 6.2e-2mbar c. 1.2e+11/cm2 38K
      Beam c. 4e+7. Cooler set 247.3V, read 246.751V.

01:50

Right arm at 64.60 mm

Left arm IN at 36.54 mm

MBS working - hopefully

Target ~3E11

Injection ca. 3E7

horizontal beam position 8.75 mm

vertical beam position  -5mm

Changed electron cooler set point to 247.3 V

Read value 246.75 V

Collector current 4.3A

Histograms and statistics zero'd. Code reset

Rates OK. Temps OK.

NOTE. Between 23:45 and 12:45 the electron cooler was off? We called HKR and they turned it back on. Are we using the same cooler settings? Is the cooler still definitely working properly? Ask Claude in the morning

02:30

The target density started to oscillate between 2e+10 and 3.5e+10. However, the pump speed seems to be stable.

03:50

The oscillations seems to deepend between 1e+10 and 6e+10. Additionally the E1 pump slowed down to 815. As Nikos suggested during the tuning, I tried to lower the temperature from 41K to 40.8K.

04:00 - 04:30

No major change was observed, thus I increased the temperature to 42.2K in order to try to get the pump to the nominal rotation. After 10 minutes, the pump slowed down to 810 and the pressure in E1 reached 2.2e-1. Since increasing the temperature seemed to have a negative effect, I slowly decresed the temperature with steps of 0.2 K, until reaching 40K. At this point, the E1 pump returned to 819/820, the pressure of E1 lowered to 1.6e-1 and the target density seems to be more stable with a value of 2.8e+11.

05:00

The target density started decreasing to 1.5e+10 and the pump speed slowed to 815. I've tried to lower the temperature to 39.8K, but the target density started to decrease. Thus I've set the temperature to 40.2K. The pump speed raised to 818 but the target density remaind at 1e+11 level with oscillations between 8.5e+10 and 1.5e+11. After some minutes, it started slowly increasing towards the 2e+11 region. The E1 pumping speed is stable at 818 and the pressure of E1 is 2.02e-1.

05:10

Electron cooler off, restarted 10 minutes after by calling HKK.

05:30

Target density at 1.5e+11, however, the E1 raised to 2.3e-1 and the pump speed decreased to 810. Since going down seemed to solve it, I decreased the temperature to 39.6K. After 5 minutes the E1 lowered to 1.9e-1 and the pump speed is going up (currently at 814). The target density is at the same level of 1.5e+11.

06:00

Again the target density started to go down, as well the speed of the E1 pump and the E1 pressure reached 2.3e-1. I lowered the temperature to 39.2K: the target density raised to approximately 3.8e+11 (and keeps going up), the E1 pressure lowered to 1.9e-1 and the E1 pump speed started increasing from 810 to 815.

06:30

The target density starting going down again, the E1 started increasing to 2.3e-1 and the E1 pump speed decreased to 810. I lowered the temperature to 38.8K, the density raised to 3.5e+11, the E1 pressure lowered to 1.9e-1 and the pumping speed starting increasing.

07:56 Gleb has taken the beam to try settings for the 5+ charge state. As soon as the target is ready, the 1+ charge state will be given back.

Detectors have been moved out for safety

08:10
      Run 63
   
      DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachment 4

      
09:55 
      Run 63 

      DSSSD bias & leakage current OK 

      FEE64 temperatures OK  

      ADC data item stats OK

      per FEE64 Rate spectra OK

10:30

Data rate appeared very high c. 2000 kB/s instead of the usual 200 kB/s.

Rate on first two ASICs of aida02 was high (~2 kHz) but rest of aida01-04 looked fine.

ASIC check load reduced rate back to normal levels. Data rate reduced back to 200 kB/sec.

New ADC offsets loaded into the CARME_Sort code

Aida03 appears to be down. Check load does not resolve issue. Moving detector arm does not resolve issue. No spike in leakage current observed. System checks appear OK.  Zeroing ADC data item statistics keeps aida03 at 606023857 items and does not zero.

Issue resolved by resetting the data links for aida03

13:20

DSSSD bias & leakage current OK

FEE64 temperatures OK

ADC data item stats OK

per FEE64 Rate spectra OK

21:30

Waiting for the target.

Beam has been running, we have been running without storage.

See attachment showing beam stripe on the detectors.

Run 63 continued

22.06 DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachments 4-5
       aida16 producing HEC data, ASIC check load to clear


23.56 DSSSD bias & leakage current OK - attachment 6

      FEE64 temperatures OK - attachment 7

      ADC data item stats - attachment 8

      per FEE64 Rate spectra - attachments 9

       aida01-aida04 high ADC data item rates - left DSSSD motion cycle required to reset


03.28 DSSSD bias & leakage current OK - attachment 10

      FEE64 temperatures OK - attachment 11

      ADC data item stats - attachment 12

      per FEE64 Rate spectra - attachments 13

       aida01-aida04 high ADC data item rates - left DSSSD motion cycle required to reset


07.50 DSSSD bias & leakage current OK - attachment 14

      FEE64 temperatures OK - attachment 15

      ADC data item stats - attachment 16

      per FEE64 Rate spectra - attachments 17

       aida01-aida04 high ADC data item rates (see above) appears to have resolved itself or has been resolved (but not logged)

21:00

Claude has achieved optimal cooling parameters for the beam

No target and internal work inside the cave tomorrow is required

Run 63 going - beam only background

Right arm at 64.60 mm

Left arm IN at 36.54 mm

MBS fakemotion script running

High rates on top left dssd again. Cycle left servo motor two times resolved issue

Rates OK. Temps OK.

Target has been moved out and H2 switched off. Changed to He.

Nikos will repair nozzle tomorrow morning. Remote checks until then.

Beam optimization and target change

New run 61

Right arm at 64.60 mm

Left arm IN at 36.54 mm

MBS working - hopefully

Target 4E11

Injection ca. 3E7

horizontal beam position 8.75 mm

vertical beam position  -5mm

Changed electron cooler set point to 244.95 V

Read value 244.4 V

Collector current 4.31A

Histograms and statistics zero'd. Code reset

Rates OK. Temps OK.

10:24

We lost the beam for 5 minutes. No counting spike observed when we got it back.

1L10

We lost the beam again for 5 minutes, but no counting spike obsevered when we got it back.

11:50


      DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachment 4
      
      Beam intensity - ~ 3.3E7 pps

      Target density - 5.14E11 atoms/cm2

12:00 - 12:40

Large fluctuations in the target pressure, going down to 1e-9. We increased the temperature a little but it did not solve the problem.

Increased pressure 0.5 K more. Seems more stable

13:09

FEEs on det 2 stopped working. Checkloaded. Fixed.

No beam.

05:36

Run started.

Conditions as before, except left servo now really in.

06:24

Run continues OK, file R60_9

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

System wide checks as usual.

07:30


      DSSSD bias & leakage current OK - attachment 4

      FEE64 temperatures OK - attachment 5

      ADC data item stats - attachment 6

      per FEE64 Rate spectra - attachment 7
      
      Beam intensity - ~ 4.8E7 pps

      Target density - 7.25E11 atoms/cm2
      

9:20


      DSSSD bias & leakage current OK - attachment 8

      FEE64 temperatures OK - attachment 9

      ADC data item stats - attachment 10

      per FEE64 Rate spectra - attachment 11
      
      Beam intensity - ~ 4E7 pps

      Target density - 7E11 atoms/cm2
      

21:32

New run 59

Right arm at 64.60 mm

Left arm IN at 36.54 mm

MBS working - hopefully

Target 4.7E11

Injection ca. 4E7

horizontal beam position 8.75 mm

vertical beam position  -5mm

Changed electron cooler set point to 244.85 V

Read value 244.3 V

Collector current 4.31A

Histograms and statistics zero'd. Code reset

Rates OK. Temps OK.

22:44

Screenshots of the above

23:00

Detector 0 shows usual strong noise. Shook twice. Fixed it. Beam loss in correspondence with this event.

Beam mostly recovered a few minutes later.

23:28

Detector 0 shows noise. Shook twice with servo. No result. Shook with pneumatic. Fixed. Some beam instabilities again.

01:00

Temps OK. Rates OK.

Merger OK. Write to disk OK (file 59_13)

01:36

Detector 0 shows usual strong noise. Shook it. Fixed it.

01:46

Detector 0 shows noise. Shook twice with servo. No result. Shook with pneumatic. Fixed.

The noise increase is definitely correlated with spikes in YRT1DT1MK current reading. Unclear what the reading is.

02:36

Target density has been consistentyl above 1E12 recently, very unstable and trending forward. Increased Lakeshore setpoint by 0.5 K.

Density decreases to high 1E11, and appear significantly more stable. E1 pressure reading also decreasing to 1E-1 mbar.

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

03:58

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

Target still unstable and now a bit too low density. Trying to slowly lower the temperature in 0.1 K steps.

04:55

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

Target around 6E11 atoms/cm2, with Lakeshore temperature at 30.8 K. Waiting for it to stabilise.

05:34

Detector 0 noisy. Shook. Fixed it.

Realised I had not moved the detector back at 01:46 after shaking it. Most of this run has been taken with detector 0 fully out, i.e. 18.86 mm.

Moving in and moving to a new run.

Ion beam energy is calculated using Beamcalc (https://web-docs.gsi.de/~lestinsk/beamcalc/electron.php)

Electron current is set to 4.3 mA and can be taken from Grafana

Alpha factor is 50

Ion energy is then adjusted using the cooler voltage

The cooler voltage inserted into BeamCalc is taken from the FC20 voltage divider. However an offset from the space charge correction is required!

This correction is determined experimentally by changing the electron current and finding the cooler voltage which maintains the optimum cooling of the beam.

Attachment 1 shows this plot for 15N1+ at  ~0.426 MeV/u

Attachment 2 shows this same plot in comparison with BeamCalc

To obtain the correct energy we need to subtract 2V from the voltage used in BeamCalc

An example is shown in attachment 3

Here to obtain an ion energy of 426.6 keV/u requires a cooler voltage of 246.7 V. But, due to the space charge correction this value should be 244.7 V.

The cooler voltage setpoint should therefore be chosen so that the FC20 voltage divider reads 244.7 V.

The setpoint needs to be ~0.55 V higher than the desired value i.e setpoint of 245.25 V to obtain the required 244.7 V (at least this beamtime it does)

15:30

Merger OK, Tape server OK

ADC data item statistics OK

FEE temperatures look OK

System checks OK

20:20

Merger OK, Tape server OK

ADC data item statistics OK

FEE temperatures look OK

System checks OK

13:53

      DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachment 4
      
      Beam intensity - ~ 5.0E7 pps

      Target density - off