CYRIC Hyperball2 technical memo

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CYRIC Hyperball2 technical memo

• ADCTiming??

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ADC??
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ADC???

• 60Co?g????????
• ADC dynamic range 10 V 3MeV10 V?1.33 MeV 4.4
  V
• Gain??????????
• ????20 mV?range???baseline?????20 mV?????2
  keV??????????????(????????)
• Shaping time????gain?systematic????(?????????????)
  
• ????Ge?????????60Co?1.33 MeV???????????????
• ???????Ge?efficiency?Ge???????25 cm???60Co?1.33
  MeV????????0.123 ?efficiency????NaI???????????100
  ???????(????60 ?Ge??0.0738 )
• ????????????shaping time6????????

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Example ADC??
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Shaping amp for ADC

• Pole zero??????OK
• 671??Shaping time???????????????
• ??Amp??shaping time??????????????????????????
• Reset??baseline??? _at_ 671Amp
• Single 0.10.3 ms
• Clover 0.31 ms
• ???571?572??????????????????ms?????
• Reset??shift?Ge???Inhibit????????veto??
• ???single????Reset??baseline????veto?????Reset????
  ????CFD???Reset?timing???????veto????
• Clover?????veto????OK

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Example Pole zero
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Example Reset?
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Clover reset????

• Clover?reset????????????????
• Add-back?????????reset?????????????
• ???????reset??baseline???veto??????????
• ????????????????veto???baseline???

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Example Clover reset
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Timing??
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TFA adjustment

• TFA?fine gain???????????????????????????????
• ???course gain?500?????CFD?Vth????????????????????
  (CFD????30 mV????????????????????????)
• ???????Ge?PreAmp????????????????????(?)
• TFA?shaping time
• CYRIC 100 ns ????
• KEK 50 ns ????
• Pole zero?baseline restorer?????????
• ??jumper pin??High gated????

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Example TFA out
Baseline??????TFA out? ???????????????
Vth???????????
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CFD adjustment

• Vth?ADC shaping amp??????????
• ????241Am?60 keV?????????
• ???????????152Eu?121 keV????????
• Delay 50 ns?16 ns(FWHM)???????????(BF2trigger?60C
  o???)
• TFA????????????16 ns???
• CFD?Z???????zero cross?????2????????TDC?2????
• CFD??????????????????TFA??????????????TFA?????????
  ???????

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Example Vth
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Example CFD zero cross
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Example Time resolution
6 ch1.5610 ns _at_ better Slot
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Timing???

• BF2?60Co?????Time resolution???????TDC????????????
  ???????????????delay????????
• 3 ns?????????3 ns?????????????????????
• Clover????????????FI/FO????????????coincidence???
• Timing?CFD?zero cross????????????????(????Vth?????
  ?????)

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Example Timing????????