ACTAR Nov 05 Lolly Pollacco CEA Saclay

Front End Electronicsfor

ACTAR

ACTAR Nov 05 Lolly Pollacco CEA Saclay

What Are Our Specs? - Simulation• Energy Deposit

– Particle dynamic range – p U– Stopping of particle in gas– Pad density– …

• Particle Multiplicity• Channels

– Number of channels– Power consumption– …

• External/Internal Trigger• On-Line processing• …

What Are Our Inputs?• Budget• Manpower

– Engineers – Electronics– Physicists - Simulations

ACTAR Nov 05 Lolly Pollacco CEA Saclay

Possible Soln

• GASSIPLEX– DRIFT/SeD/MAYA – CERN– 16 cannels

• T2K– Neutrino TPC– DSM/SEDI – Saclay – Can modify eventually & local experts– 64 channels– 2 msec

• ALTRO– ALICE TPC Readout Chip– CERN– 16 channels– No dead-time

• …

ACTAR Nov 05 Lolly Pollacco CEA Saclay

T2K SpecsPARAMETER VALUE

Number of Channels 72

Number of Time Bins 512

MIP value (MICROMEGAS) 12fC to 60fC

MIP value (GEM) Need values

MIP to noise ratio 100

Dynamic Range 10 MIPS on 12 bits

I.N.L 1% 0-3 MIPS; 5% 3-10 MIPS

Gain Adjustable (4 values)

Sampling Frequency 1MHz to 50MHz

Shaping Time 200ns to 4us

Readout Frequency 20 MHz to 25MHZ

Polarity of the detector signal Positive or Negative

Calibration Selection 1 / 72

Test Internal Test capacitor for each channels

Power < 3mW / Channel

ACTAR Nov 05 Lolly Pollacco CEA Saclay

T2K Chip components

Serial Interface Trigger CKIn Test

512 cells

SCAFILTER

Tpeak;Gain

CSA

1 channel

X724

BUFFER

SLOW CONTROLTEST SCA MANAGER

Stop CK

ADC

Asic T2K

GAIN

ACTAR Nov 05 Lolly Pollacco CEA Saclay

ALTRO

• PA (PASA) +System Chip(ALTRO)

• System chip– ADC + Correction + …

• ADC 10 bits • 10 & 40 MHz• Operated at IPN Orsay and Saclay• Expensive• Power hungry (35 mW/channel)

• It is built & it works

ACTAR Nov 05 Lolly Pollacco CEA Saclay

ACTAR Nov 05 Lolly Pollacco CEA Saclay

STMicroelectronicsTSA1001 ADC10 – 40 Mhz, 11 bits

ACTAR Nov 05 Lolly Pollacco CEA Saclay

ACTAR Nov 05 Lolly Pollacco CEA Saclay

ACTAR Nov 05 Lolly Pollacco CEA Saclay