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A mercuric detector system for X-ray Astronomy. II, Results from flight tests of a balloon borne instrument Preview this item
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A mercuric detector system for X-ray Astronomy. II, Results from flight tests of a balloon borne instrument

Author: John Vincent Vallerga; R K Vanderspek; G R Ricker; Massachusetts Institute of Technology. Center for Space Research.; United States. National Aeronautics and Space Administration,
Publisher: Cambridge, MA : Center for Space Research, Massachusetts Institute of Technology ; [Washington, D.C. : National Aeronautics and Space Administration], [1982]
Series: NASA contractor report, NASA CR-175329.
Edition/Format:   Book   Microform : National government publication : Microfiche : EnglishView all editions and formats
Summary:
"To establish the expected sensitivity of a new hard X-ray telescope design, an experiment was conducted to measure the background counting rate at balloon altitudes (40 km) of mercuric iodide, a room temperature solid state X-ray detector. The prototype detector consisted of two thin mercuric iodide (HgI2) detectors surrounded by a large bismuth germanate (Bi4Ge3O12) scintillator operated in anticoincidence. The  Read more...
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Details

Additional Physical Format: Online version:
Vallerga, John Vincent.
Mercuric detector system for X-ray astronomy
(OCoLC)890470382
Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: John Vincent Vallerga; R K Vanderspek; G R Ricker; Massachusetts Institute of Technology. Center for Space Research.; United States. National Aeronautics and Space Administration,
OCLC Number: 12861034
Notes: "CSR-HEA-82-46."
Description: 1 microfiche (16, [15] pages) : negative, illustrations ; 11 x 15 cm.
Series Title: NASA contractor report, NASA CR-175329.
Responsibility: J.V. Vallerga, R.K. Vanderspek, and G.R. Ricker.

Abstract:

"To establish the expected sensitivity of a new hard X-ray telescope design, an experiment was conducted to measure the background counting rate at balloon altitudes (40 km) of mercuric iodide, a room temperature solid state X-ray detector. The prototype detector consisted of two thin mercuric iodide (HgI2) detectors surrounded by a large bismuth germanate (Bi4Ge3O12) scintillator operated in anticoincidence. The bismuth germanate shield vetoed most of the background counting rate induced by atmospheric gamma-rays, neutrons and cosmic rays. A balloon-borne gondola containing a prototype detector assembly was designed, constructed and flown twice in the spring of 1982 from Palestine, Texas. The second flight of this instrument established a differential background counting rate of 4.2 O.7 x 10-5 counts sec cm keV over the energy range of 40 to 80 keV. This measurement was within 50 of the predicted value. The measured rate is approx 5 times lower than previously achieved in shielded NaI CsI or Ge systems operating in the same energy range. The prediction was based on a Monte Carlo simulation of the detector assembly in the radiation environment at float altitude."--NTIS abstract.

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Primary Entity<\/h3>
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Related Entities<\/h3>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Series\/nasa_contractor_report<\/a>> # NASA contractor report ;<\/span>\u00A0\u00A0\u00A0\u00A0a bgn:PublicationSeries<\/a> ;\u00A0\u00A0\u00A0schema:hasPart<\/a> <http:\/\/www.worldcat.org\/oclc\/12861034<\/a>> ; # A mercuric detector system for X-ray Astronomy. II, Results from flight tests of a balloon borne instrument<\/span>\u00A0\u00A0\u00A0schema:name<\/a> \"NASA contractor report ;<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Series\/nasa_cr_175329<\/a>> # NASA-CR-175329<\/span>\u00A0\u00A0\u00A0\u00A0a bgn:PublicationSeries<\/a> ;\u00A0\u00A0\u00A0schema:hasPart<\/a> <http:\/\/www.worldcat.org\/oclc\/12861034<\/a>> ; # A mercuric detector system for X-ray Astronomy. II, Results from flight tests of a balloon borne instrument<\/span>\u00A0\u00A0\u00A0schema:name<\/a> \"NASA-CR-175329<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Topic\/balloon_borne_instruments<\/a>> # Balloon-borne instruments<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"Balloon-borne instruments<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Topic\/bismuth<\/a>> # Bismuth<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"Bismuth<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Topic\/iodides<\/a>> # Iodides<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"Iodides<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Topic\/monte_carlo_method<\/a>> # Monte Carlo method<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"Monte Carlo method<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/experiment.worldcat.org\/entity\/work\/data\/1806301272#Topic\/scintillation_counters<\/a>> # Scintillation counters<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"Scintillation counters<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/id.loc.gov\/vocabulary\/countries\/mau<\/a>>\u00A0\u00A0\u00A0\u00A0a schema:Place<\/a> ;\u00A0\u00A0\u00A0dcterms:identifier<\/a> \"mau<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/id.worldcat.org\/fast\/1181814<\/a>> # X-ray astronomy<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"X-ray astronomy<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/id.worldcat.org\/fast\/1181854<\/a>> # X-ray telescopes<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Intangible<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"X-ray telescopes<\/span>\"@en<\/a> ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/viaf.org\/viaf\/140800171<\/a>> # Massachusetts Institute of Technology. Center for Space Research.<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Organization<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"Massachusetts Institute of Technology. Center for Space Research.<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/viaf.org\/viaf\/146202023<\/a>> # United States. National Aeronautics and Space Administration,<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Organization<\/a> ;\u00A0\u00A0\u00A0schema:name<\/a> \"United States. National Aeronautics and Space Administration,<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/viaf.org\/viaf\/32251009<\/a>> # George R. Ricker<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Person<\/a> ;\u00A0\u00A0\u00A0schema:familyName<\/a> \"Ricker<\/span>\" ;\u00A0\u00A0\u00A0schema:givenName<\/a> \"George R.<\/span>\" ;\u00A0\u00A0\u00A0schema:givenName<\/a> \"G. R.<\/span>\" ;\u00A0\u00A0\u00A0schema:name<\/a> \"George R. Ricker<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/viaf.org\/viaf\/34703930<\/a>> # John Vincent Vallerga<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Person<\/a> ;\u00A0\u00A0\u00A0schema:familyName<\/a> \"Vallerga<\/span>\" ;\u00A0\u00A0\u00A0schema:givenName<\/a> \"John Vincent<\/span>\" ;\u00A0\u00A0\u00A0schema:name<\/a> \"John Vincent Vallerga<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/viaf.org\/viaf\/34710803<\/a>> # Roland K. Vanderspek<\/span>\u00A0\u00A0\u00A0\u00A0a schema:Person<\/a> ;\u00A0\u00A0\u00A0schema:familyName<\/a> \"Vanderspek<\/span>\" ;\u00A0\u00A0\u00A0schema:givenName<\/a> \"Roland K.<\/span>\" ;\u00A0\u00A0\u00A0schema:givenName<\/a> \"R. K.<\/span>\" ;\u00A0\u00A0\u00A0schema:name<\/a> \"Roland K. Vanderspek<\/span>\" ;\u00A0\u00A0\u00A0\u00A0.<\/div>
<http:\/\/www.worldcat.org\/oclc\/890470382<\/a>>\u00A0\u00A0\u00A0\u00A0a schema:CreativeWork<\/a> ;\u00A0\u00A0\u00A0rdfs:label<\/a> \"Mercuric detector system for X-ray astronomy<\/span>\" ;\u00A0\u00A0\u00A0schema:description<\/a> \"Online version:<\/span>\" ;\u00A0\u00A0\u00A0schema:isSimilarTo<\/a> <http:\/\/www.worldcat.org\/oclc\/12861034<\/a>> ; # A mercuric detector system for X-ray Astronomy. II, Results from flight tests of a balloon borne instrument<\/span>\u00A0\u00A0\u00A0\u00A0.<\/div>