The cave is closed and beam is back

The d intensity is about half of the intensity before the break

The gas target is prepared but the valvas cannot be opened. Anton is coming in at around 1 PM to open the gate valves.

Nikos needs to enter the cave to work on the target cooling.

21:00

Target is lost. Background run is being collected.

New run 72 - 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 6e+7 particles.

Target density ~3e9 at/cm2

Target temperature is 90 K. Values of E1 is 820 Hz, 2.6A, 4.2e-2 mbar

Aida03 detector T is stable.SCreenshot is attached.

22:27

Cooling fixed. Temps OK.

09:15

Check Leakage current: (see attachment 1)

Check NewMerger tab: (see attachment 2)

Check Fee temperatures: all green (see attachment 3)

Check statistics tab: ADC data items (see attachment 4)

                                 ADC coincidence-info #8 (see attachment 5)

                                 Good events (see attachment 7)

 Check Spectrum Browser tab: (see attachment 6)                 

Check the following plots: LowEnergyExTotal (see attachment 8)

                                         LowEnergyEyTotal (see attachment 9)

                                         LowEnergyXYRateDSSD0 (see attachment 10)

                                         LowEnergyXYTotalDSSD0 (see attachment 11)

Check system wide checks tab: all okay.

All is good.

13:30

Check Leakage current: (see attachment 1)

Check NewMerger tab: (see attachment 2)

Check Fee temperatures: all green (see attachment 3)

Check statistics tab: ADC data items (see attachment 4)

                                 ADC coincidence-info #8 (see attachment 5)

                                 Good events (see attachment 6)

 Check Spectrum Browser tab: (see attachment 7)                 

Check the following plots: LowEnergyXYRateDSSD0 (see attachment 8)

                                         LowEnergyXYTotalDSSD0 (see attachment 9)

                                         LowEnergyExTotal (see attachment 10)

                                         LowEnergyEyTotal (see attachment 11)

Check system wide checks tab: all okay.

All is good.

06:45 New data file G22-201/R57

      Right arm at 64.60 mm

      Left arm IN at 36.54 mm

      horizontal beam position 8.75 mm

      vertical beam position -5mm
   
      Changed electron cooler set point to 244.4 V

      Read value 243.851 V

      Collector current 4.31A


      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 - ~ 5.7E7 pps

      Target density - 2.91E11 atoms/cm2

8:35


      DSSSD bias & leakage current OK - attachment 5

      FEE64 temperatures OK - attachment 6

      ADC data item stats - attachment 7

      per FEE64 Rate spectra - attachment 8
      
      Beam intensity - ~ 4.8E7 pps

      Target density - 2.86E11 atoms/cm2
      
      There is no beam since 8:26 and Gleb is informed. 08:46: Beam is back.

10:49


      DSSSD bias & leakage current OK - attachment 9

      FEE64 temperatures OK - attachment 10

      ADC data item stats - attachment 11

      per FEE64 Rate spectra - attachment 12
      
      Beam intensity - ~ 4.0E7 pps

      Target density - 3.66E11 atoms/cm2


13:18


      DSSSD bias & leakage current OK - attachment 13

      FEE64 temperatures OK - attachment 14

      ADC data item stats - attachment 15

      per FEE64 Rate spectra - attachment 16
      
      Beam intensity - ~ 5.0E7 pps

      Target density - 5.67E11 atoms/cm2
      



     

Attachments 1-5 - CARME shipment in CRYRING hall
                  XHV chambers nearest to YR09

Will remove top and sides of XHV chamber crate and install 4x SAES D-2000, 1x Leybold Mag Lev 400 turbo and 1x Leybold Ionvac IE514 gauge for basic vacuum test.

Attachments 6-7 - spare wire seals shipped from Edinburgh to GSI
                  poor packing and/or re-packing has resulted in bending of wire seals
                  wire seals shipped from STFC DL to GSI appear to be OK - see attachment 1
                  

12.34 DSSSD#3 bias -149.95V leakage current -6.763uA temperature +21.2 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

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

6.763
6.764
6.764
6.765
6.767
6.767
6.767
6.767
6.768
6.769

12.48 CRYRING cave lights OFF

13.03 leakage current -6.771uA - no obvious change due to the CRYRING cave lighting

17.31 DSSSD#3 bias -149.95V leakage current -6.658uA temperature +21.0 deg C ( https://web-docs.gsi.de/~lestinsk/tempplot.php )

leakage current measurements @ 60s intervals

6.656
6.655
6.655
6.655
6.654
6.652
6.652
6.651
6.650
6.649

CRYRING cave temperature variations/cycles ~0.1 deg C at +21 deg C ambient temperature can produce leakage current variations ~60nA for a leakage current of ~6.6uA

td@winder:~/f77$ ./jgen
 *** Enter reference temperature (K)
294
 *** Enter minimum temperature, maximum temperature
 *** and temperature increment (K)
290 298 0.1

 Temperature (K)   Ratio (J(T)/J(294.0))

      290.0                0.702
      290.1                0.708
      290.2                0.714
      290.3                0.721
      290.4                0.727
      290.5                0.734
      290.6                0.740
      290.7                0.747
      290.8                0.754
      290.9                0.761
      291.0                0.767
      291.1                0.774
      291.2                0.781
      291.3                0.788
      291.4                0.795
      291.5                0.802
      291.6                0.809
      291.7                0.817
      291.8                0.824
      291.9                0.831
      292.0                0.839
      292.1                0.846
      292.2                0.854
      292.3                0.861
      292.4                0.869
      292.5                0.877
      292.6                0.884
      292.7                0.892
      292.8                0.900
      292.9                0.908
      293.0                0.916
      293.1                0.924
      293.2                0.932
      293.3                0.941
      293.4                0.949
      293.5                0.957
      293.6                0.966
      293.7                0.974
      293.8                0.983
      293.9                0.991
      294.0                1.000
      294.1                1.009
      294.2                1.018
      294.3                1.027
      294.4                1.036
      294.5                1.045
      294.6                1.054
      294.7                1.063
      294.8                1.072
      294.9                1.082
      295.0                1.091
      295.1                1.101
      295.2                1.110
      295.3                1.120
      295.4                1.130
      295.5                1.139
      295.6                1.149
      295.7                1.159
      295.8                1.169
      295.9                1.179
      296.0                1.190
      296.1                1.200
      296.2                1.210
      296.3                1.221
      296.4                1.231
      296.5                1.242
      296.6                1.253
      296.7                1.263
      296.8                1.274
      296.9                1.285
      297.0                1.296
      297.1                1.308
      297.2                1.319
      297.3                1.330
      297.4                1.342
      297.5                1.353
      297.6                1.365
      297.7                1.376
      297.8                1.388
      297.9                1.400

STOP *** Program ends

09.20 Pirani 1.00e-3 mbar IE514 3.90e-8 mbar

      Today - install TCs, connect to Pico controller and test

10.00 Bakeout tent setup guide (draft) - attachment 1

14:30 Tested all TCs and are fine

05.25 Pirani 1.00e-3 mbar IE514 3.71e-8 mbar

23:15 New run 56 with

      Right arm at 64.60 mm

      Left arm IN at 36.54 mm

      MBS working - hopefully

      Target 4E11

      Injection ca. 4E7

      horizontal beam position 8.75 mm

      vertical beam position  -5mm
   
      Changed electron cooler set point to 244.3 V

      Read value 243.757 V

      Collector current 4.31A

      Rates OK. Temps OK

00.30 DAQ continues file G22-201/R56_9

      DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2

      ADC data item stats - attachment 3

      per FEE64 Rate spectra - attachment 4

      Merger etc - attachment 5

      DSSSD bias & leakage current log, CRYRING hall ambient temperature log - attachments 6-7

01.30 Photographs of current CRYRING controls - attachments 8-14


01.30 DAQ continues file G22-201/R56_14

      DSSSD bias & leakage current OK - attachment 15

      FEE64 temperatures OK - attachment 16

      ADC data item stats - attachment 17

      per FEE64 Rate spectra
       aida16 asics # 1 & # 2 HEC data - attachment 18
       aida16 ASIC load check x2 restores normal operation - attachment 19

      target 5e+11 stable, beam 4e+7 stable 

02.45 beam off - reported to HKR

      DAQ continues file G22-201/R56_16

03.00 beam back

      beam 4e+7 stable, target 5e+11 stable

      DSSSD bias & leakage current OK - attachment 20

      FEE64 temperatures OK - attachment 21

      ADC data item stats - attachment 22

      per FEE64 Rate spectra - attachment 23


04.20 DAQ continues file G22-201/R56_21

      DSSSD bias & leakage current OK - attachment 24

      FEE64 temperatures OK - attachment 25

      ADC data item stats - attachment 26

      per FEE64 Rate spectra - attachments 27

      Cycle L DSSSDs per https://elog.ph.ed.ac.uk/CARME/603


06.04 DAQ continues file G22-201/R56_21

      DSSSD bias & leakage current OK - attachment 28

      FEE64 temperatures OK - attachment 29

      ADC data item stats - attachment 30

      per FEE64 Rate spectra - attachments 31

      beam 4e+7 stable, target 4e+11 stable

11.00 Per https://elog.ph.ed.ac.uk/CARME/170 and https://elog.ph.ed.ac.uk/CARME/171 issues have been identified with the FEE64 carriers and adaptor PCBs

Some additional comments

1) Per https://elog.ph.ed.ac.uk/CARME/170 attachments 6-9 we can see that there are no cable strain reliefs to which we can attach the FEE64 power, RJ45 network and 
timestamp HDMI cabling. It would probably be straightforward to design something which could be attached to the FEE64 carrier side panels. For the time being we will use 
the copper piping of each FEE64 as the nearest, mechanically stable point to which we secure the cabling.

2) Before the skimming of 1x Delron rail yesterday there was a small amount (<1mm say?) of transverse movement of the FEE64 during insertion into the carrier and it is 
not clear why. Small sample of measurements of FEE64 carriers, spacers etc.

Delron adaptor PCB support widths 92.85, 92.87, 92.90
Al DN100CF flange attachment width 92.97, 92.99, 93.01
Al FEE64 carrier spacing rod 93.03, 93.04, 93.03
FEE64 width (w/ 1x c. 2mm skimmed Delron rail) 100.2, 100.2, 100.3 (3 measurements along the length of the 1x FEE64)
FEE64 carrier width 102.8, 103.0 (2 measurements of 1x FEE64 carrier)


probably indicates that the spacing between the FEE64 plates is consistent. There is some variability (~0.1mm) in the Delron adaptor PCB which could affect the relative 
position of the ERNI pins and sockets. Is there some variability in the width of the FEE64s (w/ rails)?

Initial discussions of proposals to provide open CARME chamber and provide access to near and far detector chambers

We assume that we need to complete all work installing and testing DSSSDs and re-assembling CARME by Feb 2022 in readiness for bakeout. 




Proposal #1

Disconnect far detector chamber section from mid-chamber section
Disconnect DN350CF flange from near detector chamber 

Crane to support near detector chamber and mid-chamber sections

Remove feet of near detector chamber and mid-chamber sections

Install cradle(s) beneath near detector chamber and mid-chamber sections

Use for fork lift to remove cradle(s) + near detector chamber and mid-chamber sections - ML confirms that an appropriate fork lift is available 


Proposal #2 (suggested by ML)

Design and fabricate table plus rails to extend transverse rails of CARME chamber support assembly
The CARME chamber support assembly comprises the 'feet' plus two-stage welded Al frame 

Disconnect far detector chamber section from downstream section
Disconnect DN350CF flange from near detector chamber 

Slide CARME chamber plus upper stage of Al support frame transversely onto table

Use crane to move CARME chamber to work area


Other discussions

Discussed workarounds to enable install of FEE64s (outside ring, upper feedthrough) which currently conflicts with longitudinal beam of gas jet target support frame.


To Do

Edinburgh

- investigate feasibility of proposal #2
- investigate how much space is required to install FEE64s (outside ring, upper feedthrough)
  e.g. by extension of transverse beams of gas jet target support frame, move current assembly outwards from ring c. 20-25cm


GSI

- investigate feasibility of gas jet target support frame changes outlined above e.g. movement of gas/water services, purchase of longer cross beams etc.


Suggest meeting (online) to discuss results of these investigations and continue discussions w/c August 22

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.

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.

2x cooling water manifolds with 2x 8 ports have been installed - see attachments 1 & 2

'drain' ports at top of manifold to permit release of trapped air volumes. Local technicians will install a standard blank in one manifold and a small nipple valve on the 
other so that we can bleed air in a controlled way.

#Multimeter detector pin tests. 
Pins on feedthrough flanges investigated using multimeter for the top and bottom detector due to no response from bottom detector when bias was applied. Bias pins on 
correct D connectors are number 78. 

#Top detector
>Observe -18.5 kohm; between nn bias pin and pn bias pin  (multimeter 200kohm setting)
>observe open line between nn bias pin and pins 'near' pn bias pin (multimeter 200kohm setting)

>Between random pins on same D connector (nn bias pin connector) ~0.02Mohm (multimeter 2Mohm setting)
>Between random pins and unconnected on same D connector (nn bias pin connector) - open line (multimeter 2Mohm setting)
>Between random pins and bias pin on same D connector (nn bias pin connector) ~0.01-0.02 Mohm (multimeter 2Mohm setting)

>Between nn bias pin and random pin on another D connector ~-0.4Mohm (multimeter 2Mohm setting)

#Bottom detector 
>Observe open line between nn bias pin and pn bias pin (multimeter 200kohm+2Mohm; setting)
>Observe open line between nn bias pin and pins 'near' bias bias pin (multimeter 200kohm+2Mohm; setting)

>Between random pins on same D connector (nn bias pin connector) ~0.02Mohm (multimeter 2Mohm setting)
>Between random pins and unconnected on same D connector (nn bias pin connector) - open line (multimeter 2Mohm setting)
>Between random pins and bias pin on same D connector (nn bias pin connector) ~0.01-0.02 Mohm (multimeter 2Mohm setting)

>Between random pins on same D connector (pn bias pin connector) ~0.02Mohm (multimeter 2Mohm setting)
>Between random pins and unconnected on same D connector (pn bias pin connector) - open line (multimeter 2Mohm setting)
>Between random pins and bias pin on same D connector (pn bias pin connector) ~open line (multimeter 2Mohm setting)

>Between nn bias pin and random pin on another D connector ~-0.4Mohm (multimeter 2Mohm setting)

We see a similar response for both detectors except that the pn bias pin gives no response. 
We have looked to find the bias pin on nearby pins to pin 78 and on the other side of the D connector (in case of cabling error-mirror or swapped cables) but cannot find. 

4 FEE holders constructed and ready to install

02.35 DAQ continues file G22-88/R17_30

02.38 Check ASIC load
      aida01 asics # 1 and #4 & aida12 asic #2 HEC events removed



09.05 DAQ continues file G22-88/R17_53
      DSSSD bias & leakage current OK - attachments 10-11

      FEE64 temperatures OK - attachment 12

      ADC data item stats OK - attachment 13
       hot channels aida01 ( 67k ) and aida15 ( 7k )

      WR timestamps OK - attachment 14

      per FEE64 Rate and Stat spectra - attachments 15-16

      Merger, Merger stats and TapeServer - attachments 17-19

09.19 New run G22-88/R18
      all histograms & stats zero'd

      CB starting up 4He target preparatory to returning 16O2+ beam to CRYRING

      L & R arms all out

09.26 4He target c. 2e11c.2
      16O2+ beam c. 3e5/s

09.58 4He target c. 3e11/cm2
      16O2+ beam c. 5e5/s at start of cycle
      See attachments 20-22

10.40 New run G22-88/R19
      all histograms & stats zero'd

      CB will attempt to steer the beam 
      all steering options set to 0mm except YR09 target offset (vertical = -9mm) and (horizontal = 9mm) 


10.52 R arm fully in, L arm fully out
      beam steering hard right

14:24 Frank has informed us that the CRYRING team will be examining the electron cooler for th enext few hours. Run 19 stopped, Run 20 started. 
      Detectors moved fully out, target OFF. 
      All histograms and stats zero'd
      Access to the cave is required, beam OFF

15:45 Channel 1 back to 150V.


17.40 DAQ continues file G22-88/R20_13
      DSSSD bias & leakage current OK - attachments 23-24

      FEE64 temperatures OK - attachment 25

      All system wide checks OK except aida08 FPGA error - attachment 26

      WR timestamps OK - attachment 27

      ADC data item stats OK - attachment 28
       hot channels aida01 ( 80k ) and aida15 ( 7k )

      per FEE64 Rate and Stat spectra - attachments 29-30

      Merger, Merger stats and TapeServer - attachments 31-32

23.12 DAQ continues file G22-88/R20_20
      DSSSD bias & leakage current OK - attachments 33-34

      FEE64 temperatures OK

      All system wide checks OK except aida08 FPGA error - attachment 35

      WR timestamps OK - attachment 36

      ADC data item stats OK - attachment 37
       hot channels aida01 ( 80k ) and aida15 ( 7k )

      per FEE64 Rate and Stat spectra - attachments 38

      Merger, Merger stats and TapeServer - attachments 39-40



03.47 DAQ continues file G22-88/R20_28

      DSSSD bias & leakage current OK - attachments 41-42

      FEE64 temperatures OK - attachment 43

      ADC data item stats - attachment 44
       aida12 rate - HEC events 

      per FEE64 Rate spectra - attachment 45

      Check ASIC load 

      ADC data item stats - attachment 46

      per FEE64 Rate spectra - attachment 47

      Merger, Merger stats and TapeServer - attachments 48-49





      

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 

R3 started

Pulser ON. Approx 2 kHZ.

1.8*w waveforms attachments 1+2

ADC data items statistics - attchment 3

1.8*L spectra - attachments 4+5

Pulser widths are larger than during testing prior to the Feb beamtime. Widths in Channels;

aida01 = 76

aida02 = 82

aida03 = will upate all later tonight..

R3 ended. Pulser OFF

17:15

R4 Started. Alpha background run.

All neg feed-throughs have now been fully installed, with ground tags 
and power wires crimped and attached to the correct pins. Feed-throughs 
are installed as seen in Image 
1 of zip file, with mark at the top of the feed-through. The pin 
assignment is seen in Image 2. The pins are assigned letters A to F, 
with F the top pin and C the bottom 
pin as installed(refer to images 1+2). The ground is pin c, with the 
two power wires connected to the bottom pins either side of the ground 
(pins b and d). Connections of 
wires from the negs to the feed-through is seen in image 3. Feed-
throughs have been electrically checked. The ground pin is checked 
against the chamber giving 
approx 0.5 ohms and the power pins are checked together giving 5-10 
ohms. Each of the power pins are open circuit with respect to the 
ground. A 
thermocouple has been attached under the bolt of one of the neg pumps 
(image 4).

Pirani gauge and hot cathode gauge have been installed on the chamber 
(images 5,6,7,8) on the section furthest from the turbos. 

Upper valve, turbo and supports have all now been installed (images 
9,10,11). Images 12,13 are of the internal of the turbo and turbo 
ports. The lower valve supports 
produced by the Daresbury group (image 14) are also now attached. These 
supports were required as the lower valve sits higher than anticipated 
due to shorter right-angled 
flanges.

Chamber is now ready to close and leak test!

JM plans to install new crimped, 3mm dia copper drain wires (a la AIDA@DESPEC) this afternoon. 

Initial Grounding - Lemo cables connecting adaptor cards ground in daisy chain. Fee bodies connected by 3mm copper drain wires in daisy chain. Two chains brought together 
at final adaptor card which is connected to cryring ground. 

Attachments 1-5

ADC data item rates   all <10k
ASIC settings         all LEC slow comparators 0x64
1.8.L spectra aida05-08 widths 556, 511, ?, 570 ch FWHM respectively
1.8.W spectra 20us FSR
Adaptor card grounding image

1.8L widths appear broader than previous day of ~300 width. Reason unknown, no change made to setup as yet. 

Second Grounding - 3mm copper drain wires connect each adaptor card to Fee body. Fee bodies daisy chained together using 3mm copper drain wire and connected to cryring 
ground. 

ADC data item rates   all <10k
ASIC settings         all LEC slow comparators 0x64

Attachments 6-8
1.8.L spectra aida05-06 widths 620, 550 ch FWHM respectively, 1.1.L aida08 width 350 ch FWHM
1.8.W spectra 20us FSR. Some extra high frequency noise
Adaptor card grounding 
 

Third Grounding - 3mm copper drain wires connect adaptor cards in daisy chains. Fee bodies daisy chained together using 3mm copper drain wire. Two chains brought 
together and connected to cryring ground. 

ADC data item rates   all <10k
ASIC settings         all LEC slow comparators 0x64
1.8.L spectra aida05-08 similar to initial grounding ~500 ch FWHM

Attachments 9-11
1.8.W spectra 20us FSR.
AIDA5-8 channel rates. Rates dominated by noisy strips. Missing strips come and go as ASIC settings checked. 
Adaptor card grounding

Some work still required to reduce noise in the system and reduce pulser widths. Pulser should also be checked on scope 

Gauge turned back ON. Bias 80V, 3.5 uA before. Bias 80V, 5.4 uA after. Bias turned off and on again. NO change to diode characteristic, current ramps high before coming 
down once bias on. Bias left ON 80V to see if stable when second gauge turned on and valves reopened. Pulser ON. Fee power OFF. Water cooling ON. 

No significant changes to waveforms, pulser width or rates with gauge ON. Other noise contributions probably outweigh effect of the gauge at this point. 

3mm copper grounding cable and attachments, crimper and Yorkshire tea left in control room.