A5039225795- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Advanced Semiconductor Detectors and Materials
- CCD and CMOS Imaging Sensors
- Advanced X-ray and CT Imaging
- Nuclear Physics and Applications
- Analog and Mixed-Signal Circuit Design
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- X-ray Spectroscopy and Fluorescence Analysis
- Advancements in PLL and VCO Technologies
- Electronic and Structural Properties of Oxides
- Radiation Effects in Electronics
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Advanced X-ray Imaging Techniques
- Superconducting and THz Device Technology
- Advancements in Semiconductor Devices and Circuit Design
- Astrophysics and Cosmic Phenomena
- Engineering and Technology Innovations
- Sensor Technology and Measurement Systems
- Black Holes and Theoretical Physics
- Graphite, nuclear technology, radiation studies
- Infrared Target Detection Methodologies
Brookhaven National Laboratory
2012-2021
Stony Brook University
2019-2020
Savannah River National Laboratory
2016-2017
Goddard Space Flight Center
2017
University of Surrey
2016
Redlen Technologies (Canada)
2016
Pennsylvania State University
2016
Charles University
2016
Czech Academy of Sciences, Institute of Physics
2016
Brookhaven College
2010
We present VMM1, the first prototype of a family front-end ASICs designed for ATLAS muon upgrade. The ASIC will operate with MICROMEGAS and TGC detectors, providing charge timing measurements along other features including sub-hysteresis discrimination, address event in real time, digital output per channel Time-over-Threshold measurements. shaper, via concept Delayed Dissipative Feedback (DDF), supports analog dynamic ranges excess 10 \thinspace000. With capacitance 200 pF nominal peaking...
Two 20 mm × 15 pixelated CZT detectors made by eV-Products were characterized using the new H3D Application Specific Integrated Circuits (ASIC) readout system developed Instrumentation Division at Brookhaven National Laboratory. The ASIC is capable of reading out energy and timing signals from 121 anode pixels planar cathode electrode one detector simultaneously. has a measured electronic noise ~2.2 keV FWHM with dynamic range to 3.0 MeV. two achieved resolution 0.48% 0.60% FWHM,...
We present a front-end application-specific integrated circuit (ASIC) for wire based time-projection-chamber (TPC) operating in liquid Argon (LAr). The LAr TPC will be used long baseline neutrino oscillation experiments. ASIC must provide low-noise readout of the signals induced on wires, digitization those at 2 MSamples/s, compression, buffering and multiplexing. A resolution better than 1000 rms electrons 200 pF input capacitance an range 300 fC is required, along with low power operation...
We investigated the feasibility of long-drift-time CdZnTe (CZT) gamma-ray detectors, fabricated from CZT material produced by Redlen Technologies. crystals with cross-section areas 5 × mm2 and 6 thicknesses 20-, 30-, 40-, 50-mm were configured as 3D position-sensitive drift detectors read out using a front-end ASIC. By correcting electron charge losses caused defects in crystals, we demonstrated high performance for relatively thick unselected material.
New results from testing an array of 6 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$\,\times\,$</tex></formula> 15 mm Notation="TeX">$^{3}$</tex></formula> virtual Frisch-grid CdZnTe (CZT) detectors with common-cathode readout for charge signals correction and rejection incomplete collection events (ICC) are presented. The employs parallelepiped-shaped crystals a large geometrical aspect ratio...
An ASIC for high rate photon counting measurements with multiple energy discrimination is presented. Optimized pixelated CdZnTe sensors, the composed of 64 channels low-noise charge preamplification, high-order shaping (40 ns minimum peaking time), and five window-discriminators associated 16-bit counters. efficient readout scheme allows simultaneous measurement through a 60 MHz output bus. The architecture experimental results are reported, impact shaper order on resolution, ballistic...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> We describe an application specific integrated circuit (ASIC) for 3D position-sensitive detectors. It was optimized pixelated Cadmium–Zinc–Telluride (CZT) sensors, and it measures, corresponding to ionizing event, the energy timing of signals from 121 anodes one cathode. Each channel provides low-noise charge amplification, high-order shaping, along with peak- timing-detection. The cathode's can...
We describe a front-end application specific integrated circuit (ASIC) developed for silicon Compton telescope. Composed of 32 channels, it reads out signals in both polarities from each side strip sensor, 2 mm thick 27 cm long, characterized by capacitance 30 pF. Each channel provides low-noise charge amplification, shaping with stabilized baseline, discrimination, and peak detection an analog memory. The channels can process events simultaneously, the read is sparsified. amplifier uses...
We present an application-specific integrated circuit (ASIC) for high-resolution x-ray spectrometers (XRS). The ASIC reads out signals from pixelated silicon drift detectors (SDDs). pixel does not have field effect transistor (FET); rather, readout is accomplished by wire-bonding the anodes to inputs of ASIC. dissipates 32 mW, and offers 16 channels low-noise charge amplification, high-order shaping with baseline stabilization, discrimination, a novel pile-up rejector, peak detection analog...
We report on the development of an application specific integrated circuit (ASIC) for 3D position sensitive detectors (3D PSD). The ASIC is designed to operate with pixelated wide bandgap sensors like Cadmium-Zinc-Telluride (CZT), Mercuric Iodide (Hgl2) and Thallium Bromide (TIBr). It measures amplitudes timings associated ionizing event 128 anodes, anode grid, cathode. Each channel provides low-noise charge amplification, high-order shaping peaking time adjustable from 250 ns 12 μs, gain 20...
The longer electron lifetime of today's CdZnTe (CZT) crystals allows for free carriers to travel distances in the crystals, which means that, principle, thicker devices could be fabricated. These CZT would offer greater detection efficiency high-energy gamma-ray detectors. However, up now, thicknesses and sizes actual detectors have still been limited by nonuniform detector response, biggest reported literature are (20×20×15)-mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
We developed a robust and low-cost array of virtual Frisch-grid CdZnTe detectors coupled to front-end readout application-specific integrated circuit (ASIC) for spectroscopy imaging gamma rays. The operates as self-reliant detector module. It is comprised 36 close-packed 6 × 15 mm(3) grouped into 3 sub-arrays 2 with the common cathodes. analog ASIC accommodates up anode 9 cathode inputs. Several modules can be single- or multi-layer unit operating Compton coded-aperture camera. present...
CdZnTe (CZT) is a promising medium for room-temperature gamma-ray detectors. However, the low production yield of acceptable quality crystals hampers use CZT detectors spectroscopy. Significant efforts have been directed towards improving to make them generally available radiation Another way address this problem implement detector designs that would allow more accurate and predictable correction charge loss associated with crystal defects. In work, we demonstrate high-granularity...
The traditional method for electron lifetime measurements of CdZnTe (CZT) detectors relies on using the Hecht equation. procedure involves measuring dependence detector response applied bias to evaluate μτ product, which in turn can be converted into carrier lifetime. Despite general acceptance this technique, is very convenient comparative testing different CZT materials, assumption a constant electric field inside unjustified. In equation, means that drift time would linear function...
We introduce a front-end application specific integrated circuit (ASIC) for wire based Time-Projection-Chamber (TPC) operating in liquid Argon (LAr). The LAr TPC will be used long baseline neutrino oscillation experiments. ASIC must provide low-noise readout of the signals induced on wires, digitization those at 2 MS/s, compression, buffering and multiplexing. A resolution better than 1000 rms electrons 200 pF input capacitance an range 300 fC is required, along with low power operation (at...
We describe an application specific integrated circuit (ASIC) for 3D position-sensitive detectors. It was optimized pixelated CZT sensors, and it measures, corresponding to ionizing event, the energy timing of signals from 121 anodes one cathode. Each channel provides low-noise charge amplification, high-order shaping, along with peak- timing-detection. The cathode's can be measured in three different ways: first is based on multiple thresholds amplifier's voltage output; second uses...
We present VMM1, the first prototype of a family front-end ASICs designed for ATLAS muon upgrade. The ASIC will operate with MICRO MEG AS and TGC detectors providing charge timing measurements along number features including sub-hysteresis discrimination, address event in real time, digital output per channel Time-over-Threshold measurements. shaper, using concept Delayed Dissipative Feedback (DDF), allows analog dynamic ranges excess 10,000. With capacitance 200 pF nominal peaking time 25...
The peak detector derandomizer ASIC provides threshold discrimination, arbitration, and timing detection with analog memory, sparsification, multiplexing for 32 input channels of pulse data. In this work the is characterized high-rate operation. A new version ASIC, can process multiple events occurring at same time time-over-threshold measurement pile up rejection.
We present an ASIC for a <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> He gas detector to be used in small angle neutron scattering experiments at the spallation source oak ridge. The is composed of 64 channels with low noise charge amplification, filtering, timing and amplitude measurement circuits, where innovative current-mode peak-detector digitizer (PDAD) adopted. proposed PDAD provides same time peak detection A/D conversion real...
We present an application specific integrated circuit (ASIC) for high-resolution X-ray spectrometers. The ASIC is designed to read out signals from a pixelated silicon drift detector (SDD). Each hexagonal pixel has area of 15 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and anode capacitance less than 100 fF. There no Field Effect transistor (FET) in the pixel, rather, readout done by wire-bonding anodes inputs ASIC. provides 14...
Homogeneity of properties related to material crystallinity is a critical parameter for achieving high-performance CdZnTe (CZT) radiation detectors. Unfortunately, this requirement not always satisfied in today's commercial CZT due high concentrations extended defects, particular subgrain boundaries, which are believed be part the causes hampering energy resolution and efficiency In past, effects boundaries have been studied Si, Ge other semiconductors. It was demonstrated that tend...