Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Martin Janecek"'
Publikováno v:
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, Vol 1, Iss 2-3, Pp 76-79 (2012)
A novel relaxation oscillator based on integrating the diode-switched currents and Schmitt trigger is presented. It is derived from a known circuit with operational amplifiers where these active elements were replaced by current conveyors. The circui
Externí odkaz:
https://doaj.org/article/31ccece0f42c40b8994c248e761532c2
Autor:
Cameron Geddes, Martin Janecek, Yigong Zhang, Kai Vetter, Paul Barton, M. Garcia-Sciveres, Brian J. Quiter
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 903:56-69
Author(s): Quiter, BJ; Zhang, Y; Barton, PJ; Geddes, CGR; Garcia-Sciveres, M; Janecek, M; Vetter, K | Abstract: This paper describes the design and simulation of a radiation detector system for diagnostic measurements of photon beams produced by Thom
Autor:
Jian Zhou, Ronald H. Huesman, D. Wilson, William W. Moses, Chinh Vu, Jinyi Qi, Qiyu Peng, Woon-Seng Choong, Martin Janecek, J.S. Huber
Publikováno v:
IEEE transactions on nuclear science, vol 62, iss 1
We have constructed and characterized a time-of-flight Positron Emission Tomography (TOF PET) camera called the Tachyon. The Tachyon is a single-ring Lutetium Oxyorthosilicate (LSO) based camera designed to obtain significantly better timing resoluti
Autor:
Martin Janecek, Willem G. J. Langeveld
Publikováno v:
Physics Procedia. 66:260-269
The bremsstrahlung X-ray spectrum in high-energy, high-intensity X-ray cargo inspection systems is attenuated and modified by cargo materials depending on the cargo atomic number (Z). Spectroscopy of transmitted x rays is thus useful to measure the a
Autor:
Martin Janecek, James F. Christian, Purushottam Dokhale, Patrick McVittie, J.-P. Walder, Christopher J. Stapels, Mickel McClish, Bob Zheng, William W. Moses, Kanai S. Shah, H. von der Lippe
Publikováno v:
IEEE Transactions on Nuclear Science. 59:13-18
Solid-state photomultiplier (SSPM) arrays are a new technology that shows great promise to be used in PET detector modules. To reduce the number of channels in a PET scanner, it is attractive to use resistor dividers, which multiplex the number of ch
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 659:252-257
At the High-throughput Discovery of Scintillator Materials Facility at Lawrence Berkeley National Laboratory, scintillators are synthesized by solid-state reaction or melt mixing, forming crystalline powders. These powders are formed in various granu
Autor:
Gautam Gundiah, Ramesh B. Borade, Edith Bourret-Courchesne, Marvin J. Weber, Stephen M. Hanrahan, Yetta Eagleman, Stephen E. Derenzo, Gregory Bizarri, Andrew Canning, Rostyslav Boutchko, Anurag Chaudhry, Martin Janecek
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 652:247-250
We report the scintillation luminosities, decay times, and emission wavelengths for 19 Ce 3+ activated scintillators, 18 Eu 2+ activated scintillators, and 4 self-activated scintillators. Of these, 18 have not been previously reported either as phosp
Autor:
Piotr Szupryczynski, Martin Janecek, M.A. Spurrier, Charles L. Melcher, Woon-Seng Choong, Mark S. Andreaco, William W. Moses
Publikováno v:
IEEE Transactions on Nuclear Science. 57:1570-1576
We have explored methods for optimizing the timing resolution of an LSO-based detector module for a single-ring, “demonstration” time-of-flight PET camera. By maximizing the area that couples the scintillator to the PMT and minimizing the average
Autor:
William W. Moses, Martin Janecek
Publikováno v:
IEEE Transactions on Nuclear Science. 57:964-970
To accurately predict the light collection from a scintillating crystal through Monte Carlo simulations, it is crucial to know the angular distribution from the surface reflectance. Current Monte Carlo codes allow the user to set the optical reflecta
Autor:
David K. Wehe, Paul Barton, James F. Christian, Christopher J. Stapels, Martin Janecek, William W. Moses, Erik Johnson
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 610:393-396
As part of a project to develop a complete stochastic model of the solid state photomultiplier (SSPM), we simulated the effects of a reflective layer in the non-active region which reflects photons back into the crystal for a second chance at detecti