AIDA: A 16-channel amplifier ASIC to read out the advanced implantation detector array for experiments in nuclear decay spectroscopy

D. Braga, S. Thomas, P.J. Coleman-Smith, I.H. Lazarus, T. Davinson, R.D. Page

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

We have designed a read-out ASIC for nuclear decay spectroscopy as part of the AIDA project - the Advanced Implantation Detector Array. AIDA will be installed in experiments at the Facility for Antiproton and Ion Research in GSI, Darmstadt. The AIDA ASIC will measure the signals when unstable nuclei are implanted into the detector, followed by the much smaller signals when the nuclei subsequently decay. Implant energies can be as high as 20GeV; decay products need to be measured down to 25keV within just a few microseconds of the initial implants. The ASIC uses two amplifiers per detector channel, one covering the 20GeV dynamic range, the other selectable over a 20MeV or 1GeV range. The amplifiers are linked together by bypass transistors which are normally switched off. The arrival of a large signal causes saturation of the low-energy amplifier and a fluctuation of the input voltage, which activates the link to the high-energy amplifier. The bypass transistors switch on and the input charge is integrated by the high-energy amplifier. The signal is shaped and stored by a peak-hold, then read out on a multiplexed output. Control logic resets the amplifiers and bypass circuit, allowing the low-energy amplifier to measure the subsequent decay signal. We present simulations and test results, demonstrating the AIDA ASIC operation over a wide range of input signals.
Original languageEnglish
Title of host publicationANIMMA 2011 - Proceedings: 2nd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications
DOIs
Publication statusPublished - 1 Jan 2011

Fingerprint Dive into the research topics of 'AIDA: A 16-channel amplifier ASIC to read out the advanced implantation detector array for experiments in nuclear decay spectroscopy'. Together they form a unique fingerprint.

Cite this