Run 27 running

28/05/2025

(ignore 26 - in-between run)

We start a new run with real data taking condititon: beam is ok, target density is 9.6e11 cm-2, detectors are moving in-out periodically.

Cooler voltage setpoint 1128 V.

Beam energy = 1.99 MeV/u (from HKR) (same as run 25)

Left arm at 18.86 mm

Right  arm IN at 83.69 mm (OUT 37.96 mm)

vertical beam position 0.0 mm

horizontal beam position  -3.5mm

Beam intensity ~1e+7 particles.

Target density ~9.6e11 at/cm2

Target temperatures: T1=31.5 K T2=35.2 K

Beam cycle set to 10 seconds.

11;57

All checks OK.

Aida10's rates seems low now, but aida07 is instead jumping between 200 and 4000 following beam.

15:45

Root histograms refreshed.

Temps OK - attach

Stats OK - attach

All checks OK

Leakage OK - attach

             Base         Current         Difference
aida01 fault      0x0 :      0x1 :      1  
FPGA Timestamp error counter test result: Passed 15, Failed 1
If any of these counts are reported as in error
The ASIC readout system has detected a timeslip.
That is the timestamp read from the time FIFO is not younger than the last

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.

23:20

JM thinks we cannot see 7Be locus on run 24. Possibly the right arm cannot get close enough.

Stopped moving right arm

Started moving left arm as previously: 32.52 mm -> 77.56 mm

Checked with bunched beam: not clipping. Possibly we could go further in - to be decided.

Started run 25

Target - 1.1E12 atoms/cm2

Beam - 1.2E7 pps

Root histograms refreshed.

Temps OK - attach

Stats OK - attach

All checks OK

Leakage OK - attach

Spectrum browser 1, 7, 8 attached

00:00

Run continues OK

Temps OK, Stats OK, Merger OK

01:15

Run continues OK

Temps OK - attached

Stats OK - attached

Merger OK

Rates OK - attached

Also attached current histograms

03:10

Motors now moving 32.77 -> 77.56 mm. Unclear why, should not affect results.

Target 1.1E12 atoms/cm2

Current 1.4E7 pps

Temps OK - attached

Rates OK - attached

All checks OK

Merger OK

03:37

7Be locus appears to be clearly visible. Attach 18

04:32

Temps OK

Rates OK

Merger OK

05:30

Temps OK

Rates - aida10 showes intermittently high rates around 10k. See attached. Seems to be linked to beam, already observed last night.

06:10

Temps OK

Rates OK - aida10 still counting 10k with beam, 300 without

Merger OK

Histograms attached

7:23- LB,PW

All checks OK, general behaviour consistent with previous observations. Beam current ~ 1E7 pps

8:40

All good, attachment 27 is the spectra. Beam current 1.3E7 pps.

9;50

All good, target very stable at 1E12 at/cm^2. Noticed also Aida01 and aida02 show same behaviour as aida10, but the maximum rate is between 1000-2000 (instead of the 10000-20000 of aida10)

Run 25 stopped 10:45, Run 26 started -> laser spectroscopy laser test

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.

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.

27/05/2025 ca. 6:00

We start a new run: beam is ok, target density ok, detectors are moving in-out periodically.

Cooler voltage setpoint  1105.7 V

Attachment 8 - beamcalc with actual values

Next entry - beamcalc with set values

Right arm at 19.80 mm

Left arm IN at 77.56 mm (OUT 32.53 mm)

vertical beam position 0.0 mm

horizontal beam position  -3.5mm

Beam intensity 1.7e+7 particles.

Target density ~6e11 at/cm2

Target temperatures: T1=31.5 K T2=35.2 K

Beam cycle set to 10 seconds.

All check are Ok!

6:30

Noticed a small spike in all leakage currents, see attachment 1

6:50

all checks ok!

07:40

All checks are Ok!

Aida 10 shows sometimes higher statistics.

09:02

All checks are Ok!

Aida 10 shows sometimes higher statistics.

10:00

Checks OK.

Compression works OK.

Moved to run 23. Now moving RIGHT hand side detectors instead of LEFT hand side.

Motion 37.96 mm -> 83.69 mm

Left arm stationary at 18.86 mm

Planning to change energy around lunch.

11:35

Parameters are OK! Tragte density dropped down a bit: ~6e11 at/cm2

12:35

Parameters are OK! Tragte density dropped down a bit: ~1e12 at/cm2

13:10

Starting beam energy change. Detectors OUT.

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

Run 21 running

26/05/2025 19:42 p.m.

We start a new run with real data taking condititon: beam is ok, target density is 1.1e12 cm-2, detectors are moving in-out periodically.

Cooler voltage setpoint 1105.7 V.

Beam energy = 1.95 MeV/u

Right arm at 19.80 mm

Left arm IN at 77.56 mm (OUT 32.53 mm)

vertical beam position 0.0 mm

horizontal beam position  -3.5mm

Beam intensity 2.2e+7 particles.

Target density ~1.1e12 at/cm2

Target temperatures: T1=31.5 K T2=35.2 K

Beam cycle set to 10 seconds.

All check are Ok!

21:44

All check are Ok!

23:10

Data rate to disk ~300 kB/sec

All checks OK

ADC disk Items #6 and ADC data items screenshots - attachments 5 and 6

Target density has dropped slightly to 7e11 at/cm2. This is fine with lithium due to beam lifetime constraints.

00:43

All checks OK

01:52

All checks are OK,

Attached spectra (attachment 7 and 8).

target pressure seems to be back at ca. 1E12 at/cm2

3:27

All checks good.

target pressure went down to 5E11 at/cm2 for a while, then back up to ca. 9E11 at/cm2.

4:49

All checks good

Rates higher on aida10 and aida4 (see attachment 9), monitoring. It is not consistently high but for example aida10 goes 222->20000->300->11000. It seems to follow the detector movement (higher rates when detector are IN)

Data rate to disk ~370kB/s.

Spectra attached in 10-11.

5:11

Still flickering. Attachment 12 with rates.

Data rate to disk around ~400 kB/s

05:30

DAQ has crashed. All statistics on aida read zero. No data through the merger or tape server.

Stopped tape server and then Run control STOP. Most FEEs did not respond to the command and continued to read going and some undefined. Reset aida servers and reloaded webpages. Same status. Have to power cycle.

22:56

Run 20 started - beam on target

Beam energy is 1.5 MeV. Horizontal beam position = 7.0 mm, vertical beam position = 0.0 mm.

Target density ~ 1e11 at/cm2

Beam intensity at inj ~ 4e7

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 ~ 3minutes.

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

01:15

Target density has increased slighty: ~ 4e11 at/cm2 (update: this only lasted about 5 min)

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

3:10

Target density has decresed slightly but will come back (hopefully) ~7e10 at/cm2.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

05:15

Target density has been somewhat unstable, between ~7E10 and ~3E12 at/cm2.

Merger OK, Tape server OK

ADC data item statistics looks as before. OK

FEE temperatures look OK

System checks OK

Leakage current stable

07:37

Run continues. Target density still fluctuating around 1E11 atoms/cm2.

Temperatures OK. Merger OK. Rates OK.

System wide checks as before.

Waveforms OK. See attachments.

Some screenshots from the online analysis. We do not see a peak at 1 MeV. We do however clearly see more D than H2+.

Stopping run to make some tests.

13.35 FEE64 temperatures OK - attachment 1

      ADC data item rates OK - attachment 2
       overall rate dominated by 2x hot channels aida15

     per FEE64 Stat spectra - attachment 3
      spectra consistent with April alpha background test 
      note high HEC data stats for aida12 asic#2 - can probably be fixed by ASIC control check

     per 1.8.W spectra - 20us FSR - attachments 4-5
      note 100kHz ripple observed for some FEE64s cf. https://elog.ph.ed.ac.uk/CARME/544

Run stopped 15:15 

Morning shift

08:16 - as run 18, target off

9:00 Increased storage time to 5 minutes. Aquired data after initial beam loss. Attach 1 &2. Far less H2+ vs D.

Temps OK

Rates as before

10:00 beam being optimised to reduce 2H+ content

Rates in aida 13, 14 suddenly spike as during overnight. Checkloaded repeatedly. No effect. Increased thresholds in 13, 14 to 0x32 bringing them in line with 15,16.

12:50

We started test with beam

Test1 ( Attached 12-52-55)

Horiz. offset: 8mm

Max vuel on 1.5MeV =1480 counst

Test2

Horiz. offset: 7mm

Test3

Horiz. offset: 6mm

target density=2.4E11

Test4

Horiz. offset: 5mm

target density=from 1.7E11 to 2.5E11

Test5

Horiz. offset: 4mm

target density=from 5.6E11 to 1.1E11 several fluctuations

Test6

Horiz. offset: 3mm

target density=1.1E11 several fluctuations. Until now we do not see a clear  signel from the reaction!

Test7

Horiz. offset: 2mm

target density=1.1E11 several fluctuations.

Test8

 Beam back again. Coasting beam. Detectors IN

Horiz. offset: 8mm

xy and energy histograms - attachment 12 and 13.

Test9

Bunched beam Detectors IN

Horiz. offset: 8mm

xy and energy histograms - attachment 14 and 15.

Test10

Horiz. offset: 6mm

xy and energy histograms - attachment

target:1.6E11

xy and energy histograms - attachment 16 and 17.

Afternoon shift

From previous overlap tests we can see that moving the beam position does cause a change in the number of events observed in the detectors.

But the change in events appears to be due to beam halo hitting the detectors rather than elastic scattering. New approach required.

We have varied the beam position (horizontal) in 1mm steps from 0mm to 9mm (the maximum allowed). We do this with the target ON and then with the target OFF.

Integral of events ~1.5 MeV taken . Difference between the target and no target plotted to gauge overlap position.

Note we have moved left arm fully out as we were worried about beam hitting dssds on injection. Will check overlap with right dssds only as left dssds have very low rate at this position.

We have determined the overlap position is about 7.0mm horizontal

Attachment 18 shows initial scan.

Attachment 19 shows a second scan in the region we highlighted as possible overlap.

17.55 DAQ continues G22-86/R15_11
      alpha background

      DSSSD bias OK - attachment 1
       ambient temperature 17.0 deg C

      FEE64 temperatures OK - attachment 2

      WR timestamps OK - attachment 3

      ADC data item stats - attachment 4
       rates dominated by 'hot' channels aida01 ( 85k ) and aida15 ( 11k ) - all other FEE64s c. 0Hz
       stats zero'd 17.57

      per FEE64 Rate & Stat spectra - attachments 5-6
       Stat spectra not zero'd recently - evidence of scattering ( rates varies with strip # )?

      aida01 ( p+n ) and aida03 ( n+n ) ASIC settings - attachments 7-8
       slow comparator 0x64

      Merger and Merger stats OK - attachments 9-10

      DSSSD leakage current = attachment 11
       shows data for 28-30.1.24 ?

      online sort per DSSSD x-y hit patterns - attachment 12

      ML vacuum pressure & cave temperature - attachments 13-14

23.01 DAQ continues G22-86/R15_17
      alpha background

      DSSSD bias OK - attachment 15
       ambient temperature 17.0 deg C

      FEE64 temperatures OK - attachment 16

      ADC data item stats - attachment 17
       rates dominated by 'hot' channels aida01 ( 72k ) and aida15 ( 11k ) - all other FEE64s c. 0Hz

      TapeServer - attachment 18

      DSSSD leakage current = attachment 19
       DSSSD #2 transient c. few hundred nA

      online sort per DSSSD x-y hit patterns - attachment 20

System checks: all ok

Attatchment 1: Rates ok

Attatchment 2: Temperatures ok

Attatchment 3: Waveform layout 7

Attatchment 4: Waveform layout 8

Attatchment 5: Waveform layout 1

Attatchment 6: Waveform layout 2

Attatchment 7: Leakage current ok

Moved pneumatic / servo for right / left arms in /out

Attachment 8: left servo fully in

9: left pneumatic in (beam is clipped)

10: left pneumatic & servo in (beam is clipped)

11: right servo in

12: right pneumatic in

13: right pneumatic & serve in

Some clear issues with strip mapping persist.

Strip map

#map strip: 01:00 left/top side, 02:00 right/bottom side (from beam view)            
stripMap    1    2                                            
stripMap    2    1                                            
stripMap    3    2                                            
stripMap    4    1                                            
stripMap    5    2
stripMap    6    1
stripMap    7    2
stripMap    8    1
stripMap    9    1
stripMap    10    2
stripMap    11    1
stripMap    12    2
stripMap    13    1
stripMap    14    2
stripMap    15    1
stripMap    16    2  

/////// UPDATE /////////

System checks: all ok - except waveform for AIDA 15 in layout 2, it has a low rate compared to others

Attatchment 14: Rates ok

Attatchment 15: Temperatures ok

Attatchment 16: Waveform layout 7

Attatchment 17: Waveform layout 8

Attatchment 18: Waveform layout 2

Attatchment 19: Waveform layout 1

Attatchment 20: Leakage current ok

/////// UPDATE //////

After beam stiring - layout of xy histograms are updated

DSSD0 and DSSD3 have the correct orientation,

DSSD1 needs to be flipped mirrored on the yaxis (i.e. right needs to be left, and left needs to be right but up and down are correct)

DSSD2 needs to be flipped on the xaxis (i.e. up needs to be down and down needs to be up but left and right are correct)

Horizontal offset in YR3 target = 9mm

Horizontal offset in YR7 target = 9mm

Horizontan offset in YR9 target = -9mm

Vertial offset in YR9 target = -8mm

Attatchment 21: Beam profile before stiring

Attatchment 22: Beam profile after stiritng - much better, hitting detectors less.

/// UPDATE ///

Mapping for the sort code has been fixed so that detectors are orientated correctly as if looking at the detectors downstream.We was missing dssdPNisX command which lets the sort code know if the PN FEEs correspond to X or Y. Correct mapping is now;

       
stripMap    1    1                                            
stripMap    2    2                                            
stripMap    3    1                                            
stripMap    4    2                                            
stripMap    5    1
stripMap    6    2
stripMap    7    2
stripMap    8    1
stripMap    9    2
stripMap    10    1
stripMap    11    1
stripMap    12    2
stripMap    13    1
stripMap    14    2
stripMap    15    1
stripMap    16    2   

20:00

The beam is set at the correct energy, operators cross-checked it again. What we see  at 750 is due to the molecular beam.  The operotors are trying to optimize and get rid of this in the next 30min.

Temps and system checks OK

Leakage current OK

Merger and tape server OK

Potentiometer at 28.06 mm and 29.23 mm

20:30

Keep going with the beam tests. A new peak appears around 950 keV( See attached). Still try to understand what it is. The operators keep going

07:00

Run 12 started. D+ beam is incident on the target at 1.5 MeV

Beam intensity in the ring is ~4e7 particles

Target density shows some fluctuations but is ~1e11 atoms/cm2. Target temp 35K

Detectors are positioned fully out (Left arm 18.86mm and right arm 19.8 mm ) and are not moving

Ring pressure looks OK, YR09 E target sensor seems unaffected by the target currently reads ~5e-11 mbar.

Beam is in the ring for ~15s.

Temps and system checks OK

Leakage current OK

Merger and tape server OK

Horizontal beam position 8 mm and vertical beam position 0mm for overlap with target.

Statistics - attachment 1

Energy histogram - attachment 2

XY plot - attachment 3

We see high rate at 1.5 MeV in left dssds but very little in right dssds. XY plots also show counts are concerntrated in a very circular distribution.

07:15

Gleb has just called and requires access to the cave to check on a turbo pump in the source.

Ring vacuum looks good

Beam will be down for 10-15 minutes only hopefully. 

07:45

Beam is back in the ring but injection requires optimisation.

09:00

There are some issues with the source that require a few hours to resolve. Potentially until 7 or 8 pm tonight. We have about an hour before work starts.

We have done a quick test of the motors and moved the left and right arms in using the pnuematic only.

New position left arm = 62.71 mm , right arm = 64.6 mm.

We observed the rates in left detectors went up significantly. In the right detectors we observed little increase.

See attached xy plot - attachment 4

See attached energy histogram - attachment 5

Beam intensity has dropped significantly - below 1e6 particles so even at in positons we see few counts at the moment.

09:25

Source has degraded pretty rapidly so beam will be stopped for now.

Detectors moved back out.

Target nozzle moved from X= -13000, Y=2500 to X= -11000, Y=2500. S1 has dropped to 5e-10 mbar.

Note Gleb mentioned that last night it was likely a large proportion of the ions stored were molecular hydrogen not deuterium.

16:18

Temps and system checks OK

Leakage current OK

Merger and tape server OK

18:10

Temps and system checks OK

Leakage current OK

Merger and tape server OK

19:38

Operators are trying to optimize some beam. For now the beam is lower than it should be probably because is easy to work with the source like that.

Temps and system checks OK

Leakage current OK

Merger and tape server OK

14:30

Run 11 started. D+ beam in the ring at 1.5 MeV.

No target at the moment. Valves to the interaction chamber will soon be opened.

Stats and histograms zero'd, monitoring code reset.

All checks and temps OK

Leakage currents OK

ADC data items statistics - attachment 1

Beam in ring ~30s and manipulation ~2s

Beam intensity ~ 5.7E7

16:40

System check OK

Temperature OK

Statistics same as before

Merger and server OK

Leakage currents OK

Beam in the ring

Waiting for target , Hydrogen green

18:50

System OK

Temperature OK

Statistics same as before

Merger and server OK

Leakage currents OK

Beam ~4x10^7

Target tuning ongoing

22:05

System OK

Temperature OK

Statistics same as before

Merger and server OK

Leakage currents OK

Currently no beam -> asked operator to check source

Target tuning ongoing

23:22

System OK

Temperature OK

Statistics same as before

Merger and server OK

Leakage currents OK

Currently no beam -> operators are optimizing the intensity of the beam

Optimizing target density as well

00:55

The overlaping test started by moving the beam only in the y axis.

02:00

Overlap test is over and was found that the optimal position for the horizontal axis is 8mm. Beam on target.

Observation of an increase the 1.5 MeV peak in the CARME monitoring code when overlap with the target is found. Attachment 4.

Drop in the beam lifetime is also observed when overlapped with the target.

System OK

Temperature OK

Statistics same as before

Merger and server OK

Leakage currents OK

02:48

CRYRING measurement cycle has been made shorter (from 5 to 3 repetitions) to match it with the decreased beam life time due to optimed overlap with target.

04:37

System OK

Temperature OK

Statistics same as before

Merger and server OK

Leakage currents OK

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.

10:30

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 FEE64 temperatures OK - attachment 1

WR timestamps OK - attachment 2

ADC data item stats - attachment 3

per FEE64 Rate spectra - attachment 4

 why do we observe HEC data in aida15 asic #1?

per FEE64 1.8.L spectra - attachments 5-6

 ADC to 20MeV FSR - not clear when these spwectra were last zero;d

 currently 750keV/u D + no target ?

10.53 All histograms & stats zero'd

Merger, Taper Server etc - attachments 7-8

  bind error 98 for NewMerger server - not clear when these messahes were generated - added some returns to monitor whether these, or other, messages are repeated

DSSSD bias & leakage current OK - attachment 9

11:30

We noticed some odd peak structure in the rate energy histograms for the right hand side detectors. We took away the beam but this structure persisted. 

This was not observed in the total energy histograms, the reason for this is the applied multiplicity cut to the total histograms. Removing this cut the peaks are clearly visible (attachment 10). Putting the cut back in we see the peaks removed (attachment 11). These events correspond to some noisy strips on the detectors on the right hand side (see attachment 12). Notice the much larger rate on the RHS. Current ADC data items statistics show FEE modules for the RHS also much larger (attachment 13). We did not observe this with no beam (https://elog.ph.ed.ac.uk/CARME/554) but did with beam last night (https://elog.ph.ed.ac.uk/CARME/558) so there nust be some effect of having beam in the ring increasing the number of events on the RHS. Note the detectors are fully out and the events are localised in these strips. 

Note we have moved the detectorsand removed beam from the ring in this time period to investigate these peaks.

12:50

Run 10 continues. Temps OK. System checks OK. Merger OK, Tape server OK.

Leakage current OK.

Notice the 'beam peak' at 1.5 MeV is larger in the left hand side (attachment 14)

14:26

We have started the new_optimeren.py on pi@gas-stepper to try and align the gas target. Valves to the interaction chamber are closed.

Setting the nozzle X=-13000, Y=1000 we observe an increase in E4 from 4E-10 mbar to 2E-9 mbar. Moving either side we observe a drop in E4. We take this as the gas target being aligned.

Anton will now open the valves to the gas target.

Run 10 stopped.         

We opened one up and soldered a co-ax cable to one of the +6v power contacts at the output of the filter board.

Connecting this to a 'scope we observed a level of +/- 5mv noise with no FEE connected.

Connecting one FEE made little difference.

Re-connected the FEE to the power supply in the cabinet and wired a co-ax to a spare FEE power plug. 

Ran the system with two FEEs on the bench top and two in the cabinet. The benchtop FEEs were connected to the NIM bin in the cabinet with copper braid.

Using a PB4 in the NIM bin and my test input cards on the FEE mezzanine connector, the following readings were taken using the 'integrate' function in the spectrum browser.

Shaping 8us, negative pulse.

aida02, ASIC1, ch0 Peak width => 16.58 channels ( full 16 bit spectra )

aida03, ASIC1, ch0 Peak width => 18.48 channels ( full 16 bit spectra )

aida04, ASIC1, ch0 Peak width => 18.05 channels ( full 16 bit spectra )

These could be better but the output of the PB4 was not perfect. I think ASIC 1 Ch0 is normally the worst on the mezzanine.

Attachments 1 to 6 are the waveforms and some zoomed in.

The co-ax from the power supply was connected to a 'scope and showed a noise level of +/-50mv. 

Fourier analysis of this noise showed two peaks 109kHz and 218kHz. ( Attachments 7 & 8 )