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Precision Cutting and Analysis of Conductive Rubber at RIKEN Using Ultrasonic Technology

This report details the advancements in precision cutting of conductive rubber at RIKEN by Itaru Nakagawa. Using a super sonic cutter, a precision of approximately ±0.8mm was achieved while cutting 2mm thick Fuji Polymer conductive rubber, which was later replaced with ShiEtsu EC-300BH. The adhesion of silver paste to the rubber was effective for practical applications. Various measurements and trigger latency scans were conducted on 22Na scintillator events, providing insights into signal structures and event selection. Detailed analyses reveal consistency between different measurement methods.

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Precision Cutting and Analysis of Conductive Rubber at RIKEN Using Ultrasonic Technology

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  1. Recap Analysis RIKEN/RBRC Itaru Nakagawa

  2. Conductive Rubber Attempted to cut in RIKEN using super sonic cutter. Achieved Precision ~ ± 0.8mm

  3. Conductive Rubber Assembly Removed 2mm thick Fuji Polymer Made Conductive rubber and replaced with ShiEtsu EC-300BH. Silver paste glued Fuji Polymer’s rubber very well. Sticky enough for practical use for 2x2x2tmm rubber. Not tested 3x3x3tmm one yet. Difficult to line up cubes nicely. EC-BHの残りとEC-BMの 打ち抜きはソッコー（株） に依頼。

  4. Trigger Improvement 22Na scintillator 22Na g chamber g

  5. Scinti Trigger Latency Scan 200k events 0BCLK 2BCLK 4BCLK 8BCLK Clock Trigger 90 Sr 200k events

  6. Latency Scan Results

  7. X-talk Analysis

  8. Sampled Strip 17 27 22 (trigger)

  9. w/o recap scope shots Source@ 21 ~ 22 17 27 22 10 sec accumulation time Trigger

  10. w/ recap scope shots Source@ 21 ~ 22 17 27 22 10 sec accumulation time Trigger

  11. w/o recap averaged pulse Source@ 21 ~ 22 Strip#25 Strip#27 10 sec accumulation time Trigger Strip#19 Strip#20

  12. w/ recap averaged pulse Source@ 21 ~ 22 Strip#25 Strip#27 Trigger Strip#19 Strip#20

  13. Scope Measurements Summary

  14. Consistency btwn Scope and CROC-DAQ measurements

  15. Event Selection of Peak Strip ある程度のタイミングセレクションは自動的に入って いる。fADC[][2]>fADC[][3]を要求するとイベントはなくなって しまう。つまりfADC[][2]でピークを迎える事象はゴミイベントのみ。 Strip=21 fADC[][2]-fADC[][0]>1000

  16. Operating Voltage at 1800V w/o recap w recap

  17. Operating Voltage at 1800V (shape cut) w/o recap w recap ADC[2]/ADC[0]>5 ADC[2]>1000 ADC[1]<ADC[2]

  18. Signal Structure ADC[2] vs. ADC[0]

  19. 4 Samples Event Structure fADC[][1]>fADC[][2] fADC[][2]>fADC[][3]

  20. feedata000.root .vs feeclus000.root • As long as one sticks with fADC[st][], there is no filtering in contained events in feeclus000.root. Difference between fADC[st][]’s in these files is difference in pedestal subtracted or not.

  21. Clustering .vs raw data dat100601/feeclus002.dat dat100601/feedata002.dat

  22. dat100601/feedata002 fADC[st][2]<1000

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