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Wednesday, July 29, 2020 | History

2 edition of A liquid xenon imaging telescope for 1-30 MeV gamma-ray astrophysics found in the catalog.

A liquid xenon imaging telescope for 1-30 MeV gamma-ray astrophysics

A liquid xenon imaging telescope for 1-30 MeV gamma-ray astrophysics

  • 216 Want to read
  • 24 Currently reading

Published by National Aeronautics and Space Administration in [Washington, D.C .
Written in English

    Subjects:
  • Atrophysics.,
  • Gamma ray observatory.,
  • Radiation detectors.,
  • Scintillation.,
  • Telescopes.,
  • Xenon.

  • Edition Notes

    Other titlesDevelopment of a high-resolution liquid xenon imaging chamber for gamma-ray astronomy.
    Series[NASA contractor report] -- NASA-CR-185999., NASA contractor report -- NASA CR-185999.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL16121101M

    A telescope is popularly imagined to be a visual device used to observe things far away using mirrors and lenses. However, when the photons exceed energies of ~ keV (called gamma-ray photons and , times greater than the energy of an optical photon), such direct methods of imaging become increasingly difficult. As a result, several. of the Liquid Xenon Gamma Ray Imaging Telescope (LXeGRIT) Alessandro Curioni This thesis presents the laboratory calibration and in-ight performance of the liquid xenon -ray imaging telescope (LXeGRIT). LXeGRIT is the prototype of a novel concept of Compton telescope, based on a liquid xenon.

    of high resolution liquid xenon imaging detectors in the fidd of 7-ray astrophysics. In the energy range from _ keV to 30 MeV future advances require at least arcminute angular resolution and flux sensitivity for?-ray lines (e.g. MeV) at the level of s photons ¢m-2 s-x. Following these considerations, two?-ray telescope designs based. The Microchannel X-ray Telescope for the Gamma-Ray Burst mission SVOM D. G otza, J. Osborneb, wide eld non-imaging gamma-ray (30 keV { 5 MeV) NaI spectrometers. Two narrow eld instruments, a visible telescope, VT, and the MXT, will point the GRB location, after an autonomous slew of the satellite, in order with many fundamental physics.

    An almost complete collection of the papers given at the International Workshop on Imaging in High Energy Astronomy (Anacapri, Italy, ). These proceedings, which concentrate on imaging above 10 keV, represent the state of the art in the field, resulting from the success of many missions (I.C. Granat and CGRO) carrying detectors for high energy astronomy with imaging capabilities.   Gamma-rays coming from space are mostly absorbed by the Earth's gamma-ray astronomy could not develop until it was possible to get our detectors above all or most of the atmosphere, using balloons or spacecraft. The first gamma-ray telescope carried into orbit, on the Explorer 11 satellite in , picked up fewer than cosmic gamma-ray photons.


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A liquid xenon imaging telescope for 1-30 MeV gamma-ray astrophysics Download PDF EPUB FB2

As part of our ongoing research program to develop a liquid xenon gamma-ray imaging telescope (LXe-GRIT) for medium energy astrophysics, we have built a liquid xenon time projection chamber (LXeTPC) with a total volume of 10 liters and a sensitive are of 20 cm by 20 by: 6.

Get this from a library. A liquid xenon imaging telescope for MeV gamma-ray astrophysics. [United States. National Aeronautics and Space Administration.;]. The Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT) is the first realization of a liquid xenon time projection chamber for Compton imaging of MeV γ-ray sources in measuring the energy deposit and the three spatial coordinates of individual γ-ray scattering points, the location of the source in the sky is inferred with Compton kinematics by: The experiment LXe-CAT (Liquid Xenon-Coded Aperture Telescope), which we have proposed for (gamma) -ray astrophysics observations in the keV - 10 MeV energy range, uses a Liquid Xenon Time Projection Chamber (LXe-TPC) as a position sensitive (gamma) -ray detector, and a coded aperture mask to provide a telescope with an angular resolution of 30 ft over a field of view (FOV) of Cited by: 3.

LXeGRIT is the first prototype of a novel Compton telescope for MeV gamma-ray astrophysics based on a Liquid Xenon Time Projection Chamber (LXeTPC), sensitive in the energy band of MeV.

The detector, based on liquid xenon time-projection chambers, is optimized for approximately - 10 MeV and combines high efficiency within a 3 sr field-of-view with approximately 1 degree(s) angular resolution and excellent background reduction capability.

Nuclear Physics B (Proc. Suppl.) 32 () North -Holland n ~dliIa I lP',-1 ti rd | I'k'. [Ik'll '. PROCEEDINGS SUPPLEMENTS A Liquid Xenon Imaging Telescope for Gamma-Ray Astrophysics: Design and Expected Performance E.

Aprile, A. Bolotnikov, D. Chen and R. Mukherjee Physics Department and Columbia Astrophysics Laboratory Columbia University, New York, NY. LXeGRIT – Liquid Xenon Gamma-Ray Imaging Telescope – is the first prototype of a Compton telescope for MeV γ-ray astrophysics based on a LXe time projec-tion chamber.

One of the most relevant figures of merit for a Compton telescope is the detection efficiency for γ-rays, which depends on diverse contributions such. A liquid xenon time projection chamber (LXeTPC) has been developed to image cosmic γ-rays in the energy band –20 MeV.

Its performance as Gamma Ray Imaging Telescope (LXeGRIT instrument) has been tested during a high altitude balloon flight (Spring ’99, New Mexico). A Liquid Xenon Imaging Telescope for MeV Gamma-Ray Astrophysics Elena Aprile, Reshmi Mukherjee, and Masayo Suzuki Columbia AstrophysicsLaboratory Columbia University,New York, NY ABSTRACT We discuss the application of a high resolution liquid xenon imaging chamber as a "r-ray telescope for medium energy astrophysics.

We have observed the remarkable improvement, especially at a low electric field region, in liquid xenon doped with triethylamine (TEA) and trimethylamine (TMA).

Furthermore, in order to apply this effect to real gamma-ray detectors, time stability and temperature effect have been investigated. The gamma-ray detector of the LXeGRIT balloon payload is a Liquid Xenon Time Projection Chamber (LXeTPC), optimized for gamma-rays in the range of MeV.

Liquid xenon is an ideal material for gamma-ray detection due to its high density (3 g/cm 3) and high atomic number (Z=54).

Above keV, gamma-rays in LXe lose their energy mostly. A liquid xenon imaging telescope for MeV gamma-ray astrophysics.

By time correlation between the fast light signal and the charge signal shows that the scintillation signals produced in liquid xenon by ionizing particles provides an ideal trigger in a Time Projection type LXe detector aiming at full imaging of complex gamma-ray events. Get this from a library.

A high resolution liquid xenon imaging telescope for MeV gamma-ray astrophysics: construction and initial balloon flights: annual status report for NAGW 1 January December [Elena Aprile; United.

The Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT) is the first realization of a liquid xenon time projection chamber for Compton imaging of MeV γ-ray sources in astrophysics. The present invention provides an improved gamma ray detector module and a method of operating such a detector module for more accurately determining the position of a gamma ray interaction within the detector.

The detector module includes an induction array arranged at an offset angle relative other arrays utilized in the detector, whereby the relative timing of the detection of ionization.

1. Introduction. In recent astrophysical observations, the Large Area Telescope on the Fermi Gamma-ray Space Telescope (Fermi-LAT) and the Nuclear Spectroscopic Telescope Array (NuSTAR) opened new windows to survey astrophysical phenomena in the energy domains for hard X-rays (up to 80 keV) and high-energy gamma rays (above 20 MeV), respectively.

LXeGRIT—Liquid Xenon Gamma-Ray Imaging Telescope—is the first prototype of a Compton telescope (CT) for MeV γ-ray astrophysics based on a LXe time projection of the most relevant figures of merit for a CT is the detection efficiency for γ-rays, which depends on diverse contributions such as detector geometry and passive materials, trigger efficiency, dead time, etc.

This balloon-borne telescope consists of an unshielded time projection chamber with an active volume of cm 2 × 7 cm filled with high purity liquid xenon. Four VUV PMTs detect the fast xenon scintillation light signal, providing the event trigger. wires and 4 anodes detect the ionization signals, providing the event spatial coordinates.

As part of our ongoing research program to develop a liquid xenon gamma-ray imaging telescope (LXe-GRIT) for medium energy astrophysics, we have built a liquid xenon time projection chamber. The present invention provides an improved gamma ray detector module () and a method of operating such a detector module () for more accurately determining the position of a gamma ray interaction () within a detector ().

The detector module () includes an induction array () arranged at an offset angle relative other arrays utilized in the detector (), whereby the relative.A liquid-xenon time projection chamber (TPC) is discussed in terms of its utility as an imaging telescope for high energy astrophysics. The concept exploits the efficiency of xenon as an ionization and scintillation medium for imaging astrophysical gamma-ray sources.

Compton telescopes and pair-creation telescopes are the most successful instruments used in space-based gamma-ray astronomy in the energy range from ≈ MeV to ≈ GeV. The principles of measurement of both kinds of telescopes are explained and an overview of early Compton and pair telescopes is given.