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Development of a High Resolution Liquid Xenon Detector for Gamma-ray Astrophysics

Author: Reshmi Mukherjee
Publisher:
ISBN:
Category :
Languages : en
Pages : 400

Book Description

Development of a High Resolution Liquid Xenon Imaging Chamber for Gamma-Ray Astronomy

Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722160401
Category :
Languages : en
Pages : 32

Book Description
The objective was to develop the technology of liquid xenon (LXe) detectors for spectroscopy and imaging of gamma rays from astrophysical sources emitting in the low to medium energy regime. In particular, the technical challenges and the physical processes relevant to the realization of the LXe detector operated as a Time Projection Chamber (TPC) were addressed and studied. Experimental results were obtained on the following topics: (1) long distance drift of free electrons in LXe (purity); (2) scintillation light yield for electrons and alphas in LXe (triggering); and (3) ionization yield for electrons and gamma rays in LXe (energy resolution). The major results from the investigations are summarized. Aprile, Elena Unspecified Center NAGW-1370...

Development of a High Resolution Liquid Xenon Imaging Telescope for Medium Energy Gamma Ray Astrophysics

Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722160531
Category :
Languages : en
Pages : 32

Book Description
In the third year of the research project, we have (1) tested a 3.5 liter prototype of the Liquid Xenon Time Projection Chamber, (2) used a prototype having a 4.4 cm drift gap to study the charge and energy resolution response of the 3.5 liter chamber, (3) obtained an energy resolution as good as that previously measured by us using chambers with drift gaps of the order of millimeters, (4) observed the induction signals produced by MeV gamma rays, (4) used the 20 hybrid charge sensitive preamplifiers for a nondestructive readout of the electron image on the induction wires, (5) performed extensive Monte Carlo simulations to obtain results on efficiency, background rejection capability, and source flux sensitivity, and (6) developed a reconstruction algorithm for events with multiple interaction points. Aprile, Elena Unspecified Center NAGW-2013...

Technique And Application Of Xenon Detectors, Proceedings Of The International Workshop

Author: Yusuke Koshio
Publisher: World Scientific
ISBN: 9814487376
Category : Science
Languages : en
Pages : 211

Book Description
Contents:The Basic Properties of Liquid Xenon as Related to Its Application in Radiation Detectors (W F Schmidt)Non-Proportionality of the Scintillation Yield in Liquid Xenon and Its Effect on the Energy Resolution for Gamma-Rays (T Doke)Development of Liquid Xenon Detectors for Medical Imaging (V Chepel)The DAMA Pure Liquid Xenon Experiment (R Bernabei)DRIFT: A Dark Matter Detector with Directional Sensitivity (B Morgan)Studies of Barium Ion Mobility in Liquid Xenon (M Miyajima)XENON: A 1-Tonne Liquid Xenon Experiment for a Sensitive Dark Matter Search (E Aprile)Progress on the Enriched Xenon Observatory Double-Beta Decay Experiment (S Waldman)and other papers Readership: Researchers in high energy physics. Keywords:Low Energy Solar Neutrinos;Dark Matter;Double Beta Decay;Liquid Xenon;Gamma-Ray Astronomy;Radiation Detectors

Application of Two Phase (Liquid/Gas) Xenon Gamma-Camera for the Detection of Special Nuclear Material and PET Medical Imaging

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
The McKinsey group at Yale has been awarded a grant from DTRA for the building of a Liquid Xenon Gamma Ray Color Camera (LXe-GRCC), which combines state-of-the-art detection of LXe scintillation light and time projection chamber (TPC) charge readout. The DTRA application requires a movable detector and hence only a single phase (liquid) xenon detector can be considered in this case. We propose to extend the DTRA project to applications that allow a two phase (liquid/gas) xenon TPC. This entails additional (yet minimal) hardware and extension of the research effort funded by DTRA. The two phase detector will have better energy and angular resolution. Such detectors will be useful for PET medical imaging and detection of special nuclear material in stationary applications (e.g. port of entry). The expertise of the UConn group in gas phase TPCs will enhance the capabilities of the Yale group and the synergy between the two groups will be very beneficial for this research project as well as the education and research projects of the two universities. The LXe technology to be used in this project has matured rapidly over the past few years, developed for use in detectors for nuclear physics and astrophysics. This technology may now be applied in a straightforward way to the imaging of gamma rays. According to detailed Monte Carlo simulations recently performed at Yale University, energy resolution of 1% and angular resolution of 3 degrees may be obtained for 1.0 MeV gamma rays, using existing technology. With further research and development, energy resolution of 0.5% and angular resolution of 1.3 degrees will be possible at 1.0 MeV. Because liquid xenon is a high density, high Z material, it is highly efficient for scattering and capturing gamma rays. In addition, this technology scales elegantly to large detector areas, with several square meter apertures possible. The Yale research group is highly experienced in the development and use of noble liquid detectors for astrophysics, most recently in the XENON10 experiment. The existing facilities at Yale are fully adequate for the completion of this project. The facilities of the UConn group at the LNS at Avery Point include a (clean) lab for detector development and this group recently delivered an Optical Readout TPC (O-TPC) for research in Nuclear Astrophysics at the TUNL in Duke University. The machine shop at UConn will be used (free of charge) for producing the extra hardware needed for this project including grids and frames.

Development of Liquid Xenon Imaging Gamma-Ray Spectrophotometers

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 48

Book Description
We have investigated the application of liquid xenon in high resolution, low background and efficient gamma- ray detectors for the observation in space of weak sources emitting in the 0.1 - 10 MeV energy region. The basic requirement of ultra-high purity liquid xenon, necessary for the successful operation of these detectors has been satisfied with the development of an efficient and reliable purification system, capable of reducing and maintaining the concentration of electronegative impurities below one part in 109. The charge and energy resolution response of a liquid xenon (and liquid argon) ionization chamber has been systematically measured as a function of electric field strength, using various radioactive sources. Our results of 4.5% FWHM and 2.6% FWHM at 1 MeV in liquid xenon and liquid argon, respectively are the best reported in the literature. Their deviation from theoretical estimates based on Fano factor statistics has been interpreted as due to recombination straggling on low energy delta-electrons produced along the primary ionizing particle. The effect of photosensitive dopants in the liquid has also been measured. Improved charge collection and energy resolution is observed for the case of alpha particles. In view of its application for event triggering in an imaging ionization chamber, we have measured the yield of the primary scintillation light abundantly emitted in liquid Xenon, using both electrons and alpha particles. The dependence of the event will provide an ideal tool for background rejection.

Imaging Detectors In High Energy, Astroparticle And Medical Physics - Proceedings Of The Ucla International Conference

Author: Jun Park
Publisher: World Scientific
ISBN: 9814547042
Category :
Languages : en
Pages : 214

Book Description
This volume addresses four major topical areas: imaging detectors for astrophysics application, noble liquid compound, medical application and high energy application.Noble liquid and scintillating fiber technology, which opened a new era in high spatial (energy) resolution, high speed detection of charged particles and gamma rays, is developing further and its application seems to be concentrated in three major directions: astrophysics, high energy physics and medical imaging. In addition, the book covers new developments in imaging photon detectors, hybrid type (fiber and noble liquid) detectors for WIMP search and several promising techniques for new imaging detectors.