1. TPC electronics
Atsushi Taketani

2. Contents PHENIX Pixel Detector System SAMURAI TPC electronics
What will RIKEN do?
Issue
CAEN WS
TPC Wiki

3. 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 3

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

5. 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.

6. 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.

11. 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].

12. What RIKEN will do in short term
Quality Assurance of AGET chips
chips will be produced.
Assume 10 min/per chip, 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.

13. 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）

14. 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.