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Development of hard X-ray imaging detectors for the High Energy Focusing Telescope

Citation

Chen, Chi Ming Hubert (2008) Development of hard X-ray imaging detectors for the High Energy Focusing Telescope. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-04202008-135222

Abstract

The High Energy Focusing Telescope (HEFT) is a balloon-borne instrument carrying one of the first focusing telescopes for the hard X-ray band (20–70 keV). It makes use of tungsten-silicon multilayer coatings to extend the reflectivity of nested grazing-incidence mirrors beyond 10 keV. It also carries novel semiconductor pixel detectors on its focal planes to match the capabilities of the multilayer mirrors. After a decade of research and development, we achieve with HEFT an angular resolution of 1.5 arcminutes in half-power diameter, and an energy resolution of 1.0 keV full width at half maximum at 60 keV. We launched HEFT for a 25-hour balloon flight in May, 2005; the instrument performed within specification, and observed Cyg X-1, the Crab Nebula, and other celestial hard X-ray sources. In this thesis, I lay out the scientific motivations for HEFT, and give an overview of the experiment. I report on our detector development effort in depth, and document the balloon flight of 2005. I also describe a study of two relic radio sources, 0917+75 and 1401−33, with data from the soft X-ray <I>XMM-Newton</I> observatory. With a hard X-ray focusing telescope like HEFT, one can improve the sensitivity and extend the scope of such studies to other classes of objects.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Cadmium zinc telluride radiation detectors; Galaxies magnetic fields; Radiation detector circuits; Radiation mechanisms inverse Compton scattering
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Mixed availability, specified at file level
Research Advisor(s):
  • Harrison, Fiona A.
Thesis Committee:
  • Harrison, Fiona A. (chair)
  • Filippone, Bradley W.
  • Zmuidzinas, Jonas
  • Kamionkowski, Marc P.
Defense Date:10 January 2008
Record Number:CaltechETD:etd-04202008-135222
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-04202008-135222
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1428
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:20 May 2008
Last Modified:02 Dec 2014 23:22

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