12 Matching Results

Search Results

Advanced search parameters have been applied.

in creator/contributor: "DE GERONIMO, G."

open access

Readout System for Arrays of Frisch-Ring CdZnTe Detectors.

Frisch-ring CdZnTe detectors have demonstrated good energy resolution for identifying isotopes, <1% FWHM at 662 keV, and good efficiency for detecting gamma rays. We will fabricate and test at Brookhaven National Laboratory an integrated module of a 64-element array of 6 x 6 x 12 mm{sup 3} Frisch-ring detectors, coupled with a readout electronics system. It supports 64 readout channels, and includes front-end electronics, signal processing circuit, USB interface and high-voltage power supply… more

Date: October 29, 2006

Creator: Cui, Y.; Bolotnikov, A. E.; Camarda, G. S.; De Geronimo, G.; O'Connor, P.; James, R. B. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

FRONT-END ASIC FOR A SILICON COMPTON TELESCOPE.

We describe a front-end application specific integrated circuit (ASIC) developed for a silicon Compton telescope. Composed of 32 channels, it reads out signals in both polarities from each side of a Silicon strip sensor, 2 mm thick 27 cm long, characterized by a strip capacitance of 30 pF. Each front-end channel provides low-noise charge amplification, shaping with a stabilized baseline, discrimination, and peak detection with an analog memory. The channels can process events simultaneously, an… more

Date: October 27, 2007

Creator: DE GERONIMO,G.; FRIED, J.; FROST, E.; PHLIPS, B.; VERNON, E. & WULF, E.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

READOUT ASIC FOR 3D POSITION-SENSITIVE DETECTORS.

We describe an application specific integrated circuit (ASIC) for 3D position-sensitive detectors. It was optimized for pixelated CZT sensors, and it measures, corresponding to an ionizing event, the energy and timing of signals from 121 anodes and one cathode. Each channel provides low-noise charge amplification, high-order shaping, along with peak- and timing-detection. The cathode's timing can be measured in three different ways: the first is based on multiple thresholds on the charge amplif… more

Date: October 27, 2007

Creator: DE GERONIMO,G.; VERNON, E.; ACKLEY, K.; DRAGONE, A.; FRIED, J.; OCONNOR, P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

DEVELOPMENT OF A HIGH RATE HIGH RESOLUTION DETECTOR FOR EXAFS EXPERIMENTS.

A new detector for EXAFS experiments is being developed. It is based on a multi-element Si sensor and dedicated readout ASICs. The sensor is composed of 384 pixels, each having 1 mm{sup 2} area, arranged in four quadrants of 12 x 8 elements, and wire-bonded to 32-channel front-end ASICs. Each channel implements low noise preamplification with self-adaptive continuous reset, high order shaper, band-gap referenced baseline stabilizer, one threshold comparator and two DAC adjustable window compara… more

Date: November 2002

Creator: De Geronimo, G.; O'Connor, P.; Beuttenmuller, R. H.; Li, Z.; Kuczewski, A. J. & Siddons, D. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Advanced Readout Electronics for Multielement CdZnTe Sensors

A generation of high performance front-end and read-out ASICs customized for highly segmented CdZnTe sensors is presented. The ASICs, developed in a multi-year effort at Brookhaven National Laboratory, are targeted to a wide range of applications including medical, safeguards/security, industrial, research, and spectroscopy. The front-end multichannel ASICs provide high accuracy low noise preamplification and filtering of signals, with versions for small and large area CdZnTe elements. They imp… more

Date: July 8, 2002

Creator: De Geronimo, G.; O'Connor, P.; Kandasamy, A. & Grosholz, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Front-End Electronics for Imaging Detectors

No Description Available.

Date: July 1, 2000

Creator: De Geronimo, G.; O'Connor, P.; Radeka, V. & Yu, B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

FRONT-END ASIC FOR HIGH RESOLUTION X-RAY SPECTROMETERS.

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 an area of 15 mmz and an anode capacitance of less than 100 fF. There is no integrated Field Effect transistor (FET) in the pixel, rather, the readout is done by wirebonding the anodes to the inputs of the ASIC. The ASIC provides 14 channels of low-noise charge amplification, high-or… more

Date: October 27, 2007

Creator: De Geronimo,G.; Chen, W.; Fried, J.; Li, Z.; Pinelli, D. A.; Rehak, P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

NOVEL INTEGRATING SOLID STATE DETECTOR WITH SEGMENTATION FOR SCANNING TRANSMISSION SOFT X-RAY MICROSCOPY.

An integrating solid state detector with segmentation has been developed that addresses the needs in scanning transmission x-ray microscopy below 1 keV photon energy. The detector is not cooled and can be operated without an entrance window which leads to a total photon detection efficiency close to 100%. The chosen segmentation with 8 independent segments is matched to the geometry of the STXM to maximize image mode flexibility. In the bright field configuration for 1 ms integration time and 5… more

Date: July 29, 2001

Creator: FESER,M. JACOBSEN,C. REHAK,P. DE GERONIMO,G. HOLL,P. STUDER,L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Novel Integrating Solid State Detector With Segmentation For Scanning Transmission Soft X-Ray Microscopy.

Date: July 29, 2001

Creator: Feser, M.; Jacobsen, C.; Rehak, P.; De Geronimo, G.; Holl, P. & Studer, L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Amplitude and TIme Measurement ASIC With Analog Derandomization

We describe a new ASIC for accurate and efficient processing of high-rate pulse signals from highly segmented detectors. In contrast to conventional approaches, this circuit affords a dramatic reduction in data volume through the use of analog techniques (precision peak detectors and time-to-amplitude converters) together with fast arbitration and sequencing logic to concentrate the data before digitization. In operation the circuit functions like a data-driven analog first-in, first-out (FIFO)… more

Date: November 10, 2002

Creator: O'Connor, P.; De Geronimo, G. & Kandasamy, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Multichannel Energy and Timing Measurements with the Peak Detector/Derandomizer ASIC

The Peak Detector/Derandomizer ASIC (PDD) provides threshold discrimination, peak detection, time-to-amplitude conversion, analog memory, sparsification, and multiplexing for 32 channels of analog pulse data. In this work the spectroscopic capabilities of the chip (high resolution and high rate) are demonstrated along with correlated measurements of pulse risetime. Imaging and coincidence detection using the PDD chip will also be illustrated.

Date: October 16, 2004

Creator: O'Connor, P.; De Geronimo, G.; Grosholz, J.; Kandasamy, A.; Junnarkar, S. & Fried, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

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 Ryan's 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 ho… more

Date: October 29, 2006

Creator: Siddons, P. D.; Dragone, A.; De Geronimo, G.; Kuczewski, A. & Kuczewski, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department