TPAC: A 0.18 micron MAPS for digital electromagnetic calorimetry at the ILC

• Published in: 2008 IEEE Nuclear Science Symposium Conference Record pp. 2224 - 2227
• Main Authors: Ballin, J.A., Coath, R.E., Crooks, J.P., Dauncey, P.D., Levin, B., Lynch, M., Magnan, A.-M., Mikami, Y., Noy, M., Miller, O., Rajovic, V., Stanitzki, M., Stefanov, K.D., Turchetta, R., Tyndel, M., Watson, N.K., Villani, E.G., Wilson, J.A.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-10-2008
• Subjects: Calorimetry; Circuits; Detectors; Energy resolution; Laboratories; Physics; Signal generators; Silicon; Testing; Tungsten
• ISBN: 1424427142; 9781424427147
• ISSN: 1082-3654; 2577-0829
• DOI: 10.1109/NSSMIC.2008.4774795

For the ILC physics program, the detectors will need an unprecedented jet energy resolution. For the electromagnetic calorimeter, the use of a highly granular silicon-tungsten calorimeter has been proposed. We have developed a Monolithic Active Pixel-based readout for such a calorimeter, which will have extremely fine granularity and will make use of a digital readout. The first generation chip (TPAC1) implements a 168x168 array comprising 50x50 μm 2 pixels. Each pixel has an integrated charge pre-amplifier and comparator. TPACI has been manufactured in the 0.18 μm INMAPS process which includes a deep p-well. We present results of the performance of the TPACI chip together with comparison to simulations and give an outlook to the second generation chip.