skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Simulation of a Scintillator-based Compton Telescope with Micropattern Readout

Abstract

We describe simulations of a Compton telescope gamma-ray detector. The model is based on scintillation detectors and low-mass, photosensitive micro-pattern detectors, particu- larly the plasma panel sensor. The detector model has ten to twenty layers, to maximize the probability of Compton scattering while minimizing multiple scattering in a single layer. The simulations explore optimizing the micro-pattern detec- tor pixel geometry, the scintillator material, the total detector thickness, and the number of layers. In addition, we explored algorithms for determining the interaction position, total energy and discriminating Compton scattering from other processes. Our initial results indicate that this kind of Compton telescope can be much more efficient that silicon or germanium-based telescopes while providing very good position resolution.

Authors:
 [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Holifield Radioactive Ion Beam Facility
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931089
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: IEEE Nuclear Science Symposium and Medical Imaging Conference, Honolulu, HI, USA, 20071027, 20071103
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; COMPTON EFFECT; SCATTERING; GAMMA DETECTION; RESOLUTION; SCINTILLATION COUNTERS; COMPUTERIZED SIMULATION; TELESCOPES

Citation Formats

Varner Jr, Robert L, and Beene, James R. Simulation of a Scintillator-based Compton Telescope with Micropattern Readout. United States: N. p., 2007. Web.
Varner Jr, Robert L, & Beene, James R. Simulation of a Scintillator-based Compton Telescope with Micropattern Readout. United States.
Varner Jr, Robert L, and Beene, James R. Mon . "Simulation of a Scintillator-based Compton Telescope with Micropattern Readout". United States. doi:.
@article{osti_931089,
title = {Simulation of a Scintillator-based Compton Telescope with Micropattern Readout},
author = {Varner Jr, Robert L and Beene, James R},
abstractNote = {We describe simulations of a Compton telescope gamma-ray detector. The model is based on scintillation detectors and low-mass, photosensitive micro-pattern detectors, particu- larly the plasma panel sensor. The detector model has ten to twenty layers, to maximize the probability of Compton scattering while minimizing multiple scattering in a single layer. The simulations explore optimizing the micro-pattern detec- tor pixel geometry, the scintillator material, the total detector thickness, and the number of layers. In addition, we explored algorithms for determining the interaction position, total energy and discriminating Compton scattering from other processes. Our initial results indicate that this kind of Compton telescope can be much more efficient that silicon or germanium-based telescopes while providing very good position resolution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • IBIS (Imager on Board the Integral Satellite) is dedicated to fine imaging in the gamma-ray energy range. The imaging performances are achieved using a coded mask aperture system in conjunction with a position sensitive detector made of two layers. This multilayer structure of position sensitive detectors allows the application of Compton kinematics for background rejection. In order to determine the efficacy of this method, a reduced scale prototype of the instrument has been developed. The detection apparatus is composed by two scintillation matrices of 5x5 elements in the same configuration of IBIS. The upper layer pixel size is 13 xmore » 13 x 3 mm whereas the lower layer pixel size is 13 x 13 x 30 mm. An hybrid technology electronics has been setup for signals shaping and discrimination, moreover a custom software package has been developed for system calibration and data analysis. The equipment has been tested at different energies by employing radioactive sources. The results are presented and compared, when possible, with Montecarlo simulations.« less
  • The authors have configured a gamma-ray Compton-scatter telescope from five coaxial germanium detectors in order to evaluate the potential performance of germanium detectors in such devices. Due to their excellent energy resolution, (0.2% is obtainable at 1.332 MeV), properly configured, germanium detectors can produce the best combination of energy and position resolution of any commonly available detector material. Their high cost, moderate timing characteristics, sensitivity to noise and the requirement for cooling have limited the interest in such detectors in the past, but in many applications they may provide capabilities that cannot be obtained with other detector materials. The authorsmore » present the results of a preliminary measurement including energy, position and timing resolution. The problem of image reconstruction is considered in detail. Design constraints which can affect the overall performance of the telescope are also discussed.« less
  • A prototype for the new DELPHI luminosity monitor has been built and tested. The scope of this prototype was to measure the response of the proposed calorimeter in the region which is most critical for the luminosity measurement, i.e. at the inner edge of the acceptance. The aim of the new luminosity monitor is to measure the LEP luminosity with per mill systematic uncertainty: this requires experimental biases at the level of 50 [mu]m or less in the definition of the fiducial volume. Even though the authors plan to use a tungsten mask to define the inner edge of themore » acceptance, the calorimeter was designed to match intrinsically this kind of accuracy. A relatively good energy resolution is a must to be able to reject the accidental Bhabha coincidences due to off momentum electrons in LEP. A cut at 80% of the beam energy should reduce this background to less than 1[per thousand]. The technique used ensures good energy resolution and high spatial uniformity. With the prototype they have already achieved better than 2% uniformity in response and an energy resolution of 3% at 45 GeV.« less