02:15

Density remains stable at 155 K

Temperature setpoint decreased by 1K. Aim to get to 110 K to see if higher stable density can be achieved. 

Spike in YR pressures observed as temperature was decreased, still look OK. Will leave to settle for a while. T = 114K.

Rates remain stable at ~ 10^2 peak height level.  

02:33

Pressures stabilised

Setpoint to 113 K. 

02:40

No pressure spike observed after decrease

Setpoint to 112 K

02:46

No pressure spike observed after decrease

Setpoint to 111 K

Pressure spike observed  in YR pressures (smaller than last) - give time to recover. 

03:00

Setpoint to 110 K

No pressure spike observed. 

Rutherford rate peak height remains stable at ~ 10^2 . Perhaps peak height minimum is consistently higher than before, difficult to say. 

Attachment 1 - 115 K

Attachment 2 - spike 1

Attachment 3 - spike 2

All pressure stable now 

06:01

Rutherford rate was decreased compared to previous values. Max rate ~ 50 counts for the peak, average ~20 counts. 

Temperature increased to 125 K

No large increase in chamber pressure observed. 

06:25

Temperature setpoint back to 110 K.

Rutherford rate has increased, however is quite variable. Peak height 3*10^1 to 10^2 range. 

06:54

Setpoint = 110 K

Ruthrford rate has stabilised around 7*10^1 to 10^2 peak height.

Merger OK

Data rate ~ 1300 kb/sec

Leakage current ~ 3.22 uA

Temperatures OK

System checks OK

14:45

Rutherford rate was decreased significantly for longer period.

Temperature increased to 125 K

No large increase in chamber pressure observed. 

14:55

Temperature setpoint back to 110 K.

Rutherford rate has increased. Peak height 3*10^1.

Have been unable to achieve decent target density with temperature cycling so far. Will attempt to go up to 300 k and back down to around 115 k which proved successful in previous shifts.

04:20

Did another temperature cycle (118 K -> 125 K -> 95 K -> 116 K) trying to improve the pressures at the target and the detector count rate.

Rates are still mostly below 100 counts (Ex rate) and the pressures are still fluctuating by about an order of magnitude (E4: between 1e-9 and 1e-8 mbar).

04:40
Target density is hovering between 2.0e-8 and 2.3e-8, sometimes dipping below 2.0e-8

We will conduct a temperature walkthrough while there is no beam,
04:40: setpoint 125K
04:46 setpoint 95K
04:56 setpoint 108K
04:59 setpoint 110K
05:00 setpoint 112K (here improved from 110K)
05:03 setpoint 114K
05:08 setpoint 113K

05:11
113K seems good, fluctuating between 2.3e-8 and 3.1e-8
will leave temperature here

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

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

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

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.

DAQ and NewMerger appear to be cofigured correctly.

Can allocate device, create volume and open file with TapeServer but cannot write data.

See attachmnents 1-3




Noted aida09 WR timestamp issue in attachment 3 - FEE64 Reboot fixed aida09 WR timestamp issue

Restarted DAQ/Merger/TapeServer - still cannot write to disk


14.30 CU provides the following list of NetVar variables used by the Merger

"MERGE_PID"
"MERGE_ID"
"MERGE_Action"
"MERGE_Signal"
   "MERGE_Parameter"
   "MERGE_Response"
   "MERGE_State"
   "MERGE_Trace"
   "MERGE_Paused"
   "MERGE_RunOptions"
   "MERGE_HardwareVersion"
   "MERGE_LinksAvailable"
   "MERGE_TestMode"
   "MERGE_PollTicks"
   "MERGE_LinksInUse"
   "MERGE_LinksAlive"
   "MERGE_StatsTime"
   "MERGE_Command"
   "MERGE_ZeroStats"
   "MERGE_SyncStep"
   "MERGE_InitialTimeStamp"
"MERGE_LinkState"
"MERGE_LinkStatus"
"MERGE_LinkAlive"
"MERGE_LinkInUse"

15.30 Changed Merger startup and NetVars files ( attachments 6 & 7 )

      Change server command line from

./master64 -i 16 -l 16 -p 11001  &

to

./master64 -i 15 -l 15 -p 11001  &


i.e. *exactly* matches number of FEE64s currently in use ( 15x FEE64s, aida01-aida15 )

      Change NetVars from 

MERGE.LinksInUse string 1%1%1%1%1%1%1%1%1%1%1%1%1%1%1%0%

to

MERGE.LinksInUse string 1%1%1%1%1%1%1%1%1%1%1%1%1%1%1%

i.e. string has 15x 1% strings *not* 15x 1% *plus 1x 0% string 

With *both* changes we are now able to write to disk.

N.B. We did not test the above changes individually - it is possible/probable that just one of the changes above fixes the problem.

Photos of the new TTT14 DSSD delivered to GSI.
Photos of detectors are broken up by photos of SN on box
To big to put on elog. Have uploaded to /Disk/ds-sopa-group/np/GSI/CARME/TTT14_Photos.zip and will change permissions to 777

Attachments 1-5 aida01-aida05 options

System wide checks

Attachment 6 - changes to options files - differences reported but none observed (attachments 1-5)

Attachment 7 - collect memory info from FEE64 Linux

Attachment 8 - collect FPGA timestamp errors

Attachment 9 - WR decoder status

Attachment 10 - ADC calibration

Attachment 11 - Clock status

New run R84

Attempting to sync pneumatic movement with ring. Still see something on t out -> p out

Command to move out was being given relative to the wrong time.

Fixed it. Still see one-two events every time we move out around 4-6 MeV. Attempted to greatly increase time before next injection - no difference. Microphonics from moving the detectors? It's just one-two counts on entire detector, acceptable.

New run R85

Now moving in/out

Potentiometer: 23.10 mm to 67.19 mm

11.15 CARME IE514 ion gauge remains OFF
      ML says there are 2x ion gauges with line of sight to the DSSSDs - CARME IE514 (now off) and another controlled by the vacuum group - he will request that this is 
turned off Monday
      ML says that ion gauges within the upstream e-target should not have line of sight to the DSSSDs
 
      FEE64 power ON

      ASIC settings 
       appear to be using mixture of 2022Jan31-11-52-00, 2024Jan20-12.02.08, 2024Feb08-15.59.09 and 2024Apr24-14.14.03 settings

[npg@carme-gsi Options]$ pwd
/home/npg/MIDAS_Releases/23Jan19/MIDAS_200119/DB/EXPERIMENTS/AIDA/Options
[npg@carme-gsi Options]$ foreach f ( `ls` )
foreach? echo $f
foreach? cat $f/CONTENTS | grep settings
foreach? end
aida01
ASIC.settings string 2024Apr24-14.14.03
aida02
ASIC.settings string 2022Jan31-11-52-00
aida03
ASIC.settings string 2024Jan20-12.02.08
aida04
ASIC.settings string 2022Jan31-11-52-00
aida05
ASIC.settings string 2022Jan31-11-52-00
aida06
ASIC.settings string 2022Jan31-11-52-00
aida07
ASIC.settings string 2022Jan31-11-52-00
aida08
ASIC.settings string 2022Jan31-11-52-00
aida09
ASIC.settings string 2022Jan31-11-52-00
aida10
ASIC.settings string 2022Jan31-11-52-00
aida11
ASIC.settings string 2022Jan31-11-52-00
aida12
ASIC.settings string 2022Jan31-11-52-00
aida13
ASIC.settings string 2022Jan31-11-52-00
aida14
ASIC.settings string 2024Feb08-15.59.09
aida15
ASIC.settings string 2022Jan31-11-52-00
aida16
ASIC.settings string 2024Apr24-14.14.03

      slow comparator 0x64 appears to be set for all FEE64s
      positive input (p+n junction strips) FEE64s aida01, 02, 05, 06, 09, 10, 11, 12, 13, 15 & 16
      negative input (n+n Ohmic strips) FEE64s aida03, 04, 07, 08 & 14

      Check ASIC Load all FEE64s

      All system wide checks OK

      FEE64 temps OK - attachment 1

      DSSSD bias & leakage current - attachment 2
       leakage currents remain high cf. June 2024

      per FEE64 Rate spectra - attachment 3
       high rates observed for DSSSD#1 and DSSSD#3 n+n Ohmic strips
       2x hot p+n junction channels aida15 

      per FEE64 1.8.W spectra - 20us FSR - attachments 4-5

      ADC data item stats - attachment 6
       high rates observed for DSSSD#1 and DSSSD#3 n+n Ohmic strips

      CRYRING vacuum and temperature logs - attachments 7-8

12.51 Options DB re-constructed - see https://elog.ph.ed.ac.uk/CARME/665

      ASIC settings for all FEE64s restored from 2024Apr24-14.14.03
       slow comparator 0x64 appears to be set for all FEE64s
       positive input (p+n junction strips) FEE64s aida01, 02, 05, 06, 11, 12, 15 & 16
       negative input (n+n Ohmic strips) FEE64s aida03, 04, 07, 08, 09, 10, 13 & 14

      WR timestamps OK - attachment 9


14.25 EG&G Ortec 448 Pulser settings

      Amplitude 90,000
      Normalise 5.00
      Attenuator x5 IN
      Frequency Relay Line (50Hz)
      t_r 100ns
      tau_d 50us
      Polarity +

      per FEE64 Rate Spectra - attachments 10-11

      per FEE64 1.8.L spectra - attachments 12-14
       Pulser peak width aida06 87 ch FWHM, aida08 94 ch FWHM
       electronic noise poor consistent with high leakage current and 1.8.W spectra above

      ADC data item stats - attachment 15

15.50 Data transfer to Merger/TapeServer started
       Tape Server -> no storage mode
       Data directory APR25

16.30 DAQ STOP
      FEE64 power OFF
      DSSSD bias OFF

00.12 DAQ continues data file R3_15

      DSSSD bias & leakage current OK - attachment 1

      FEE64 temps OK - attachment 2

      ADC data item stats OK - attachment 3

      per FEE64 Rate spectra - attachment 4

      Merger, TapeServer etc - attachments 5-7


05.32 DAQ continues data file R3_16

      DSSSD bias & leakage current OK - attachment 8

      FEE64 temps OK - attachment 9

      ADC data item stats OK - attachment 10

      per FEE64 Rate spectra - attachment 11

      Merger, TapeServer etc - attachments 12-14

11.27 DAQ continues data file R3_17

      DSSSD bias & leakage current OK - attachment 15

      FEE64 temps OK - attachment 16

      ADC data item stats OK - attachment 17

      per FEE64 Rate spectra - attachment 21

      Merger, TapeServer etc - attachments 18-20

11.33 aida16 asic #2 2x Check ASIC control
      aida16 asic #4 2x Check ASIC control


18.53 DAQ continues data file R3_19

      DSSSD bias & leakage current OK - attachment 22

      FEE64 temps OK - attachment 23

      ADC data item stats OK - attachment 24

      per FEE64 Rate spectra - attachment 25

      Merger, TapeServer etc - attachments 26-28

      per FEE64 1.8.H - attachments 29-30

      per FEE64 1.8.L - attachments 31-32

      per FEE64 1.8.W - 20us FSR - attachments 33-36

19.10 CRYRING ambient temperature per https://web-docs.gsi.de/~lestinsk/tempplot.php - attachment 37

13.50 Cryostat set point 120K

13.49 Temperatures OK - attachment 1

13:51 System wide checks OK except WR decoder status

		 Base 		Current 	Difference
aida01 fault 	 0xab60 : 	 0xab86 : 	 38  
aida02 fault 	 0x88d3 : 	 0x88f8 : 	 37  
aida03 fault 	 0x23aa : 	 0x23d0 : 	 38  
aida04 fault 	 0x15d7 : 	 0x15fd : 	 38  
aida05 fault 	 0x2f03 : 	 0x2f0f : 	 12  
White Rabbit error counter test result: Passed 0, Failed 5

Understand the status reports as follows:-
Status bit 3 : White Rabbit decoder detected an error in the received data
Status bit 2 : Firmware registered WR error, no reload of Timestamp
Status bit 0 : White Rabbit decoder reports uncertain of Timestamp information from WR

13.56 set point 95K

      stat, 1.8.L & 1.8.W spectra - attachments 2-6

DSSSD 0 aida01 1*L spectra, aida04 **L spectra

Double peak structure feature of aida04 ( n+n Ohmic side ) strips. Single ( albeit sometimes broad peak ) observed in aida01 ( p+n junction side ) strips.
Not currently observed by DSSSD 1-3. DSSSD 0 high energy peak rate far higher than DSSSD 1-3.

Data from last week did not display this double peak but DSSSDs and beam have been moved since.

Unclear whether this reflects radiation damage and/or wafer/active area edge effects on the n+n side.
Might also reflect beam characteristics throughout cycle.

Requires calibration and dE cut to investigate.

JM comment -> early time cut analysis indicates this is a beam effect. DSSD#0 has majority of halo on it so double peak is very pronounced. 
We observe double peak all DSSDs just to a much lower level. 

Looking downstream the RHS motor assembly has  loose green/yellow (gnd?) see attachment 1

Install blank base plate to trial install in downstream CARME chamber. The rod is just through all of the mounting holes - see attachments 2 & 3

The rod, plate and block are close fitting.

The current position of the TC feedthrough is incompatible wit detector movement- the TC feedthrough should be moved.

Detector baseplate with 1x DSSSD installed - attachments 4 - 6, Cabling length looks OK. 

Should move NEG power and TCs to top & bottom DN40 flanges to avoid conflicts with DSSSDs and cabling.

12.44 DSSSD#3 bias -149.95V leakage current -6.448uA temperature +19.7 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

CRYRING cave lights ON - leakage current measurements @ 60s intervals

6.448
6.449
6.448
6.448
6.449
6.448
6.448
6.448
6.449
6.448

18.24 DSSSD#3 bias -149.95V leakage current -6.442uA temperature + 21.0 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

CRYRING cave lights ON - leakage current measurements @ 60s intervals

6.441
6.441
6.441
6.441
6.441
6.442
6.442
6.442
6.440
6.441

07.51 DAQ continues files 22Feb/R97

      ASIC settings 2022Jan31-11-52-00
       slow comparator 0x64

      EG&G Ortec 448 Pulser OFF

      All system wide checks OK

Attachment 1 - ADC data item stats

Attachment 2 - FEE64 temps OK

Attachments 3 & 4, 8 & 9 - per FEE64 1.8.W spectra 20us FSR and 200us FSR

Attachments 5 & 6 - per FEE64 1.8.L spectra

Attachment 7 - per FEE64 stat spectra

Leakage current remains 8.36 uA, 100V. 

Bias power OFF, SIP ion pump power back ON. NIM crate powered off. Motors pi and nnrpi1 still on for remote access. 
Compressed air off, water off. Fee relay power off and power cable disconnected. Motors box off. Safety pin for motors reinserted. 

Checked cable harnesses at cryring. 2 good short sections found and left with boxes in cryring. 2 damaged long sections (bad pin and broken ceramic) taken to repair in 
Edinburgh.