Status and plans of R

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Status and plans of RD for DHCAL in Russia

• Vladimir Ammosov
• Institute for High Energy Physics Protvino
  Moscow region, Russia

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Content

• 1. Tuning of RPC performance
• 2. RPC design for DHCAL
• 3. RO electronic activity
• 4. RD plans

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Tuning of RPC performance
Decision

• Use glass for anode and cathode
• ( standard RPC)
• Decrease the charge in the gas gap
• Consequences
• Possibility to diminish ageing effects
• Possibility to increase maximal rate
• Joint adjustment of RPC and RO electronics

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Tuning of RPC performance
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Tuning of RPC performance
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Tuning of RPC performance

• - It seems that tuning should be done around
• basic TFE/ISO mixture
• It is intended to study (10-100) pC region
• withh possibility to work at 50 mV threshold

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RPC design for DHCAL
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RPC design for DHCAL
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RPC design for DHCAL
Dead zones
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RO electronic activity
General scheme for 64 channel read out

• Two parts
• Conditioning (analog)
• FPGA (digital)

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RO electronic activity
Steps for design and usage
Approaches for conditioning

• Comparators - Protvino
• Trans impedance amplifiers (TIAs) - Minsk

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RO electronic activity
Conditioning - comparators
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RO electronic activity
Conditioning - comparators
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RO electronic activity
Conditioning - TIAs
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RO electronic activity
Conditioning - TIAs
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RD plans

• design and tests of approach-0 for RO
  electronics (step 1)
  Dec02
• tuning of RPC performance to Dec02
  decrease the gap charge
• design of a small RPC plane
  Dec02
• construction of this plane with a few hundred
  RO channels (step 1) Mar03
• beam tests of this plane in IHEP
  Apr03