GRAPH -- An readout ASIC for large MCP based detectors
Andrej Seljak, John Vallerga, Gang Liu, Rick Raffanti, Gary S. Varner

TL;DR
The paper introduces GRAPH, a programmable 16-channel ASIC designed for large MCP-based photon detectors, featuring novel hybrid sampling architecture and efficient event processing for high-speed waveform recording.
Contribution
It presents a new mixed-signal ASIC with hybrid sampling architecture and advanced event readout capabilities for large MCP detectors.
Findings
Achieves adjustable sampling frequency up to 125 MHz.
Records 2048 samples per channel with 12-bit digital resolution.
Reduces dead time with optimized region of interest sampling.
Abstract
We present a programmable 16 channel, mixed signal, low power readout ASIC, having the project historically named Gigasample Recorder of Analog waveforms from a PHotodetector (GRAPH). It is designed to read large aperture single photon imaging detectors using micro channel plates for charge multiplication, and measuring the detector's response on crossed strips anodes to extrapolate the incoming photon position. Each channel consists of a fast, low power and low noise charge sensitive amplifier, which provides a myriad of coarse and fine programmable options for gain and shaping settings. Further, the amplified signal is recorded using, to our knowledge novel, the Hybrid Universal sampLing Architecture (HULA), a mixed signal double buffer memory, that enables concurrent waveform recording, and selected event digitized data extraction. The sampling frequency is freely adjustable between…
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Taxonomy
TopicsCCD and CMOS Imaging Sensors · Particle Detector Development and Performance
