14:20

Target nozzle currently being replaced. No beam

We have decided to switch to 15N beam from now on.

Beam energy for 15N is significantly higher than deuteron beam so we have increased the thresholds (slow comparator) slightly for all detectors to 500 keV (0x32).

ADC data item rates - attachment 1

Run 37 started. Alpha background

Data rate ~ 200 kb/sec

17:44

All system checks OK

20:00

All system checks OK

23:30

All system checks OK

01:25

All system checks OK

03:25

All system checks OK.

Target is stable at 3.5e11, with T1=29 K

05:30

All system checks OK

Target density has slowly drifted down, and is now 1.2e11

14:00

Access to the cave as Nikos and Andreas have begun work on the target.

Run 36 started - pulser walkthrough.

Pulser amplitudes of 8, 7, 6, 5, 4, 3, 2, 1

Attachment 1 - pn channels

Attachment 2 - nn channels

Attachment 3 - pn channels (zoom)

Attachment 4 - nn channels (zoom)

Best pn channel looks like AIDA09 - pulser width 63

Worst pn channel looks like AIDA14 - pulser width 148

Best nn channel looks like AIDA12 - pulser width 58

Worst nn channel looks like AIDA16 - pulser width 246

This is approximately the same as pulser widths before the beam time.

09:30

Target density has not improved despite efforts last night. Mid 10 - low 11 density range. We will try to change the nozzle.

Target nozzle moved to the out position.

HKR allowed access to the cave to turn the compressor off. Target nozzle now warming up.

Internal cave work on changing nozzle expected to start at ~11. In the meantime we will let Wolfgang experiment with the beam settings to try to improve injection intensity.

Detectors have been moved out to fully out position

Run 35 started.

1) STOP DAQ [workspace 2, display 1, browser tab 'Run Control']
   all FEE64s should change status from 'going' to 'stopped' *except* whichever FEE64(s) have a problem - typically their status is 'going' or 'error'

2) Restart Merger by selecting the Merger icon [workspace 3, display 2]
    terminal window showing the startup will popup

3) Setup Merger by selecting 'SETUP' [workspace 3, display 1, browser tab 'NewMerger Control']

4) Start Merger by selecting 'GO' [workspace 3, display 1, browser tab 'NewMerger Control']
     all data links will be inactive (red)

5)   Disable data transfer by selecting 'Data transfer Disable #1 all' [workspace 2, display 1, browser tab 'Run Control']

6) Start DAQ

    Start DAQ by selecting 'GO' [workspace 2, display 1, browser tab 'Run Control']
     check that DAQ is *actually* going - if not repeat 'GO'

7) Check WR timestamps by selecting 'Collect all timestamps' [workspace 2, display 1, browser tab 'GSI White Rabbit Control']
     readout times will be displayed for each FEE64
     check that the readout times are monotonically increasing as you read down the list of readout times - if not, contact expert support

8) Stop DAQ 

    Start DAQ by selecting 'STOP' [workspace 2, display 1, browser tab 'Run Control']
     check that DAQ has *actually* stopped - if not repeat 'STOP

9) Enable data transfer to Merger and TapeServer and start DAQ

    Enable data transfer by selecting 'Enable data transfer Enable #1 All' [workspace 2, display 1, browser tab 'Run Control']

    Start DAQ by selecting 'GO' [workspace 2, display 1, browser tab 'Run Control']
     check that DAQ is *actually* going - if not repeat 'GO'

10) Check data is being transferred to Merger and TapeServer

    Select 'Reload' [workspace 3, display 1, browser tab 'NewMerger Control']
     you should see a non-zero 'current merged data rate' and all links should show as green at least some of the time (requires observation over several reloads)

    Select 'Reload' [workspace 3, display 1, browser tab 'TapeServer']
     you should see 'Blocks written' and 'kb written' counters increase

11) Check AIDA data is being forwarded from the TapeServer to MBS [workspace 3, display 2, command terminal]

12) Restart should now have been successfully completed. Please inform the 'on shift' crew' that AIDA is forwarding data.

    If not, please request expert assistance.

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.

15:15

Run 32 started - Beam, no target

Beam energy = 3 MeV.

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

Beam intensity at inj ~ 2.5e7

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

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 5 minutes.

Pressure in YR09 E target ~ 4.5e-11 mbar.

Motors code crashed. Beam removed from ring to re-home detectors.

15:20

Beam in the ring again, detectors homed, no target

Detectors have been set up to send signals on injection / dump

15:35

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

8:13

Since 6:40 the target density dramatically dropped to 10^9 since then it has been unstable and did not recover. Currently it is around 8e8.

09:00

Target density has been increased to the high -10, very low -11 region. We will keep this run going unless the density is increased further.

10:21

Beam energy = 3 MeV.

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

Target density ~ 1e9 at/cm2 (no target, get lost quite quckly)

Beam intensity at inj ~ 1.7e7

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

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 6 minutes.

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

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

target density has been fluctuating between E9 to E12. We can very clearly see the increase in elastic counts on our detector during high density periods.

Attachment 1 - rate plots at 1E12 at/cm2

Attachment 2 - rate plots at 1E9 at/cm2

12:26

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

After reaching a density of > 10^12 a bit before 11:00, the valve got closed. When a valve is closed, can be observed a dramatic change in the plot and one of the three green ligths of atps7vaccrz1 (0,2,4) is turned off. Nikos opened it, and now it seems stable again around 1e11.

14:07

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

15:05

Run stopped as target density is rubbish. Might as well get beam background

Beam energy = 3 MeV

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

Beam intensity at inj ~ 2.5e7

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

Cycle time ~ 6 minutes

01:05

Target density still very unstable

02:45

Target density has dropped to ~1e9 and has been at that level for 30 minutes. We will try to move the target a bit and see if we can get an increase. Target position is currently x=-12400, y=2900

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

04:15

We were able to recover some target, but it is still very unstable. The new position is x=-12800, y=2000

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

06:15

Target still unstable, fluctuating around the 5e10 region

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Beam energy = 3 MeV

Horizontal beam position = 7.0 mm, vertical beam position = 0.0 mm.

Beam intensity at inj ~ 2.5e7

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

22:52 (Attachments 1 -3)

Beam is very unstable

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

00:47

Beam is still very unstable.

We checked for beam-target overlap position and found a clear increase in counts at beam position 4.0 mm. We have left the beam at horizontal = 4.0 mm, vertical = 0.0

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

16:15

In the previous run while working on the target it was discovered that the valve was closed! Probaly this happened around 10 am, we are not sure.

The gas target inlet valve is open again, working on the target.

Beam energy = 3 MeV

Horizontal beam position = 7.0 mm, vertical beam position = 0.0 mm.

Beam intensity at inj ~ 2.5e7

Detectors are positioned IN pneumatic only. Left arm = 62.71, right arm =  64.60 mm

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 7 minutes.

Pressure in YR09 E target ~ 4.5e-11 mbar.

18:03 ( Attchments 1 -4)

Still no target!

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

20:23

We have the target back. S1( grafana) 4.8e-8. The target thickness read by the system 5E11 atoms/cm2 but apparently the formula is wrong and the value should be almost e12 atoms/cm2.

. We have now proper beam and target and we

16:10

We start a new run after doing some test with the motor. Injection time is now a 6s, moving of the motors is working fine.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

No target

12:46 (attachments 1-4)

Run 27 started - Beam no target

Beam energy = 3 MeV

Horizontal beam position = 7.0 mm, vertical beam position = 0.0 mm.

Beam intensity at inj ~ 2.5e7

Detectors are positioned IN pneumatic only. Left arm = 62.71, right arm =  64.60 mm

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 7 minutes.

Beam on BPM looks to be better than at previous energy.

Pressure in YR09 E target ~ 4.5e-11 mbar.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

13:45 (attachments 5-8)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

15:15(attachments 9-12)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

Target density 1e10 atoms/cm2. Still working on the target.

09:44

Run 26 started - Beam no target

Beam energy is being increased from 1.5 to 3 MeV

Horizontal beam position = 7.0 mm, vertical beam position = 0.0 mm.

Detectors are positioned fully OUT

Histograms and stats zero'd, monitoring code restarted.

Pressure in YR09 E target ~ 4.5e-11 mbar.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

10:48 (Attachements 1-4)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The detectors currently fully out for tuning.

11:57 (attachments 5-8)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The detectors currently fully out for tuning.

00:38

Run 25 started - Beam on target

Beam energy = 1.5 MeV.

Horizontal beam position = 7.0 mm, vertical beam position = 0.0 mm.

Target density ~ 5e11 at/cm2 (Still Fluctuating, after temperature increase)

Beam intensity at inj ~ 2.5e7

Detectors are positioned IN. Left arm = 62.71, right arm =  64.60 mm

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 5 minutes.

Pressure in YR09 E target ~ 5.2e-11 mbar.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

01:30 (Attachments 1 - 4)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density seems very unstable: fluctuations from 1e11 to 1e12 atoms/cm2 within 5min

02:37 (Attachments 5 - 8)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density is around 5e11  atoms/cm2 with small adjustments

03:32 (Attachments 9 - 12)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density is in average 5e11  atoms/cm2 with some small  adjustments. Max values up to 3e12 atoms/cm2

One of the injections at 03:43  was not ok and we lost beam for some min.  Target density 1e12 atoms/cm2.  On 04:00 the beam was back again without any operator intervention.

04:35 (Attachments 13 - 16)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density is in average 1e12  atoms/cm2.

05:43 (Attachments 17 - 20)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density decreased to 2e11 atoms/cm2 in the last 40 min

06:43 (Attachments 21 - 24)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density is fluctuating from 1e11 to 1e12 atoms/cm without any change....

07:53 (Attachments 25 - 28)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density is fluctuating from 1e11 to 1e12 atoms/cm without any change....

08:48 (Attachments 29 - 32)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

The target density is fluctuating from 1e11 to 1e12 atoms/cm without any change....

09:40 --> Run 25 stopped.

23:47

Run 24 started - Beam on target

Beam energy is 1.5 MeV.

Horizontal beam position = 7.0 mm, vertical beam position = -1.0 mm.

Target density ~ 1e11 at/cm2 (Still Fluctuating, after temperature increase)

Beam intensity at inj ~ 2.5e7

Detectors are positioned IN. Left arm = 62.71, right arm =  64.60 mm

Histograms and stats zero'd, monitoring code restarted.

Beam in the ring ~ 10 minutes.

Pressure in YR09 E target ~ 5.2e-11 mbar.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

00:23

Target density ~4.65e11 atoms/cm2

Beam intensity at inj ~ 2.7e7

Beam intensity dropped to 2.1e7 in 10 minutes. Proportionall this is much greater than before. 

Run 24 stopped.

Offline analysis data file G22-201/R22_0 to R22_11

Sort program variables https://elog.ph.ed.ac.uk/CARME/240530_180659/variables.dat

ADC data corrected for ADC offset but not gain

per DSSSD m_p verus m_n - attachment 1

For spectra below events must satisfy condition 0 < m_p < 8 *and* 0 < m_n < 8

per DSSSD p+n junction strip versus n+n Ohmic strip - attachment 2
 note - x/y channel ordering to be checked

per DSSSD E_p versus E_n - attachment 3
 20keV/channel nominal

per DSSSD E_p versus E_n - attachment 4
 gated w(1) & w(2)
 20keV/channel nominal

per DSSSD projection of gated E_p versus E_n spectra - attachments 5-8
 20keV/channel nominal

14:05

Run 22 stopped. Run 23 started we will now adjust the vertical beam position to see if we observe the beam stripe seen in the last beamtime.

Current vertical beam position 0.0 mm. Horizontal beam position 7.0 mm. Coasting beam.

Beam D+, 1.5 MeV. Storage time ~ 20 minutes. Target ON. Density ~1e11 at/cm2.

XY plot from run 22 with the same settings - attachment 1

Beam stripe looks like it is just on bottom detectors (just )

14:10

New beam settings

Vertical Beam position 5.0mm, Horizontal unchanged. Storage time reduced to ~2 minute

No real change observed. Perhaps some thing more can be seen on top right detector but definitely not like in the Feb experiment.

14:15

New beam settings

Vertical Beam position 9.0mm, Horizontal unchanged.

No real change observed again.

14:20

New beam settings

Vertical Beam position -9.0mm, Horizontal unchanged.

More events observed on bottom left detector but nothing like the Feb measurements. I think we do not have stripe effects like previously.

14:40:50

New Beam settings to check beam lifetime.

Vertical beam position set back to 0.0 mm. Horizontal unchanged

In bunched mode to observed intensity over time. 

Injection into ring 2.2e7

15:15

Beam intensity dropped to 1.1e7. Beam lifetime 35 minutes.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

15:24

We removed the target. Beam intensity at 2.2E7

After 35 minutes, the beam intensity is 1.41e7. So target does have effect on beam lifetime! We would like more.

16:05

We will now bring target back in and try to increase density.

16:10

Some sort of GSI-wide failure, we have lost beam entirely. We don't see any effect on our system. Temperatures and leakage currents are stable

Detectors moved fully out for safety

17:15

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

19:15

Still no beam

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

21:15

Still no beam

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

21:40

Beam has returned!

22:00

Target at around 9e11 and appears stable

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

22:33

Beam back in the ring. Beam settings to be updated.

Rates in right hand detectors look slightly different to before - lower in bottom right, slightly higher in top left. Perhaps beam vertical position needs to be lowered slightly.

ASIC check load just to be sure. Rates in aida15 greatly reduced - only temporarily.

09:47

12 seconds pre acc

200x cycles

Detector pneumatics IN, not moving

Running in this configuration for the rest of the shift

Target is barely 1E11 atoms/cm2 and keeps decreasing

Temps OK, checks OK, Stats OK

Writing to disk rate OK

11:22

Targets gets thinner and thinner <1E11 atoms/cm2

Temps OK System wide checks OK Merger OK

Rates OK

13:02

Temps OK. Target around 1E11 atoms/cm2

Merger OK

Rates OK

07:41

Switching to bunched beam to check D vs H content.

8:24

Attach 1&2

ONE spill

Detectors fully out

Switched to bunched beam

12 seconds pre-acceleration

100x cycles (600 seconds) -

Loss over 600 seconds 3.97E7 ions to 3.40E7 ions, i.e. negligible.

Attach 3&4

Coasting beam

12 seconds pre-acc

100x cycles

Attch 5&6

Coasting beam

12 seconds pre-acc

100x cycles

Detectors pneumatics IN

Attach 7& 8

Coasting beam

6 seconds pre-acc

100x cycles

Detector pneumatics IN

Attach 8&9

Coasting beam

12 seconds pre acc

200x cycles

Detector pneumatics IN

Running in this configuration for the rest of the shift

Target is barely 1E11 atoms/cm2 and keeps decreasing