TPC electronics Atsushi Taketani 20090410

Contents PHENIX Pixel Detector System SAMURAI TPC electronics What will RIKEN do? Issue CAEN WS http://groups.nscl.msu.edu/tpc/wiki/doku.php?id=get_collaboration_meeting_march_10-13_2009 TPC Wiki http://groups.nscl.msu.edu/tpc/wiki/doku.php?id=electronics 20090410

PIXEL (Sensor and Readout) Readout by ALICE_LHCB1 chip Amp + Discriminator / channel Bump bonded to each pixel Running 10MHz clock ( RHIC 106nsec ) Digital buffer for each channel > 4msec depth Trigger capability > FAST OR logic for each crossing 4 event buffer after L1 trigger Pixel size( x z） 　50 µm x 425 µm Sensor Thickness 200mm r = 1.28cm, z = 1.36 cm (Active area) 256 x 32 = 8192 channel / sensor 4 chip / sensor 4 sensor / stave 20090410 3

Pixel Readout Overview 60cm 11cm Half stave Bus (25cm ) + Extender (<35cm) 4*32 bit data bus is needed 20090410 4

Feature at PHENIX Almost not dead time with up to 20KHz trigger rate. Timing distribution system Level 1 Trigger decision takes 4 micro second. All channel data mush be hold until Level 1 trigger decision. Level 2 trigger by software is implemented. 20090410

TPC System Similar to the PEHNIX DAQ model System will be developed among the collaboration. But Need to modify or adjust to the RIBF system. 20090410

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AGET: Architecture AGET Slow Control. Power on reset. Test mode: Serial Interface Mode CK In Test CSA;CR;SCAin (N°1) Asic “Spy” Mode Readout SCA MANAGER SLOW CONTROL W / R TEST Power on Reset [+ indisc] AGET 512 cells SCA FILTER tpeak CSA 1 channel x72in ADC Charge range DAC Discri inhibit BUFFER x76 Hit register Σ 72 discri. SCAwrite Trigger pulse Slow Control. Power on reset. Test mode: calibration or test [channel/channel] functional [72 channels on one shot] Spy mode (cx 1). 12-bit ADC [ADS6422] Main features for AGET 72 Analog Channels: Analog part + Sampling Capacitor Array. Main features for the channel Input Current Polarity: positive or negative. CSA + PZC + Filter (semi-Gaussian order 2). [Possibility to bypass the CSA]. SCA: 512 analog memory cells [new!! + 1 for internal logical operation facility]. Auto Triggering: discriminator + threshold (DAC) + inhibition. Main features for the readout Trigger[ Analog OR of the 72 discri. ] & SCA analog data => Same ADC channel. 4 SCA readout modes. Address of the hit channel(s) [read & write]. 20090410

What RIKEN will do in short term Quality Assurance of AGET chips 1500-5000 chips will be produced. Assume 10 min/per chip, 5000 chips, it will take 50000min =833 hours=104days=5month Need to develop a QA system with other collaborator. QA skill is very useful to operate system. 20090410

What man power need Good electrical engineer or Physicist who is expert of the electronics Need a good technician or buy man power from company (人材派遣または請負契約） 20090410

Long term Issue It is not necessary to solve soon. Trigger scheme is not matched with current DAQ system. Pipeline buffer with 4 micro sec of trigger latency. Man power Budget How to pay electronics production fee. 20090410