A. Dragone

ASIC With Multiple Energy Discrimination for High-Rate Photon Counting Applications

An ASIC for high rate photon counting measurements with multiple energy discrimination is presented. Optimized for pixelated CdZnTe sensors, the ASIC is composed of 64 channels with low-noise charge preamplification, high-order shaping (40 ns minimum peaking time), and five window-discriminators with associated 16-bit counters. An efficient readout scheme allows simultaneous measurement and readout through a 60 MHz 16-bit output bus. The ASIC architecture and experimental results are reported, and the impact of the shaper order on the resolution, ballistic deficit, and pile-up is discussed

High-throughput X-ray fluorescence imaging using a massively parallel detector array, integrated scanning and real-time spectral deconvolution

A step improvement in X-ray fluorescence imaging performance is demonstrated through close integration of a large detector array, dedicated data acquisition, stage control and real-time parallel data processing, to achieve efficient elemental imaging with <1 ms per pixel, image sizes in excess of 4 megapixels, full-spectral data collection and spectral deconvolution, at detected photon rates up to 6 M/s, in prototype tests at the NSLS using a 96 detector array.

The PDD ASIC: highly efficient energy and timing extraction for high-rate applications

The peak detector derandomizer ASIC provides threshold discrimination, arbitration, peak and timing detection with analog memory, sparsification, and multiplexing for 32 input channels of analog pulse data. In this work the ASIC is characterized for high-rate operation. A new version of the ASIC, can process multiple events occurring at the same time and provides time-over-threshold measurement for pile up rejection.

A High-speed Detector System for X-ray Fluorescence Microprobes

We have developed a high-speed system for collecting X-ray fluorescence microprobe data, based on ASICs developed at BNL and high-speed processors developed by CSIRO. The system can collect fluorescence data in a continuous raster scan mode, and present elemental images in real time using Ryans Dynamic Analysis algorithm. We will present results from a 32-element prototype array illustrating the concept. The final instrument will have 384 elements arranged in a square array around a central hole.

Pile Up Rejection and Multiple Simultaneous Events Acquisition with the PDD ASIC

The peak detector derandomizer ASIC provides threshold discrimination, arbitration, peak and timing detection with analog memorization, sparsification, and multiplexation for 32 input channels of analog pulse data. In this work the ASIC, a new version of the ASIC, that can process multiple events occurring at the same time and can provide time-over-threshold measurement for pile up rejection, is presented