Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5486704 | Astroparticle Physics | 2017 | 13 Pages |
Abstract
TARGETÂ 5 is a new application-specific integrated circuit (ASIC) of the TARGET family, designed for the readout of signals from photosensors in the cameras of imaging atmospheric Cherenkov telescopes (IACTs) for ground-based gamma-ray astronomy. TARGETÂ 5 combines sampling and digitization on 16 signal channels with the formation of trigger signals based on the analog sum of groups of four channels. We describe the ASIC architecture and performance. TARGETÂ 5 improves over the performance of the first-generation TARGET ASIC, achieving: tunable sampling frequency from <0.4Â GSa/s to >1Â GSa/s; a dynamic range on the data path of 1.2Â V with effective dynamic range of 11Â bits and DC noise of â¼0.6Â mV; 3-dB bandwidth of 500Â MHz; crosstalk between adjacent channels <1.3%; charge resolution improving from 40% to <4% between 3 photoelectrons (p.e.) and >100Â p.e. (assuming 4Â mV per p.e.); and minimum stable trigger threshold of 20Â mV (5 p.e.) with trigger noise of 5Â mV (1.2 p.e.), which is mostly limited by interference between trigger and sampling operations. TARGETÂ 5 is the first ASIC of the TARGET family used in an IACT prototype, providing one development path for readout electronics in the forthcoming Cherenkov Telescope Array (CTA).
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
A. Albert, S. Funk, H. Katagiri, T. Kawashima, M. Murphy, A. Okumura, R. Quagliani, L. Sapozhnikov, A. Shigenaka, H. Tajima, L. Tibaldo, J. Vandenbroucke, G. Varner, T. Wu,