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Featured researches published by M. Stewart.


Advances in Space Research | 2001

First results from ATIC beam-test at CERN

O. Ganel; James H. Adams; E.J. Ahn; Hyo-sung Ahn; J. Ampe; G. L. Bashindzhagyan; Gary Lee Case; J. Chang; Steven B. Ellison; A. R. Fazely; R. Gould; D. Granger; R. Gunasingha; T. G. Guzik; Yong Han; J. Isbert; T. Kara; Hwan Kim; K.C. Kim; S.K. Kim; Y. Kwon; T. Lemczyk; C. Oubre; M.I. Panasyuk; B. Price; G. A. Samsonov; W. K. H. Schmidt; M. Sen; E. S. Seo; R. Sina

Abstract The Advanced Thin Ionization Calorimeter (ATIC) balloon-borne experiment will fly on several 10-day Long Duration Balloon (LDB) flights from McMurdo Station, Antarctica. Its main goal is cosmic-ray elemental spectra measurement from 50 GeV to 100 TeV for nuclei from hydrogen to iron. In September 1999 the ATIC detector was exposed to high-energy beams at CERNs SPS accelerator, within the framework of the development program for the Advanced Cosmic-ray Composition Experiment for the Space Station (ACCESS). We present initial results from these beam-tests, including energy resolutions for electrons and protons at several beam energies from 100 GeV to 375 GeV. Results on signal linearity and collection efficiency estimates are also presented. We show how these results compare with expectations based on simulations, and their expected impacts on mission performance.


Advances in Space Research | 2004

The ATIC Long Duration Balloon Project

T. G. Guzik; J. Adams; H. S. Ahn; G. L. Bashindzhagyan; J. Chang; Mark J. Christl; A. R. Fazely; O. Ganel; D. Granger; R. Gunasingha; Yong Han; J. Isbert; Hwan Kim; K.C. Kim; S.K. Kim; E. N. Kouznetsov; M.I. Panasyuk; A. D. Panov; B. Price; G. A. Samsonov; W. K. H. Schmidt; E. S. Seo; R. Sina; N. V. Sokolskaya; M. Stewart; A. Voronin; J. Z. Wang; J. P. Wefel; J. Wu; V.I. Zatsepin


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2005

Beam tests of the balloon-borne ATIC experiment

O. Ganel; J. Adams; H. S. Ahn; J. Ampe; G. L. Bashindzhagyan; Gary Lee Case; J. Chang; Steven B. Ellison; A. R. Fazely; R. Gould; D. Granger; R. M. Gunasingha; T. G. Guzik; Yong Han; J. Isbert; Hyun-Man Kim; K.C. Kim; S.K. Kim; Y. Kwon; M.I. Panasyuk; A. D. Panov; B. Price; G. A. Samsonov; W. K. H. Schmidt; M. Sen; E. S. Seo; R. Sina; N. V. Sokolskaya; M. Stewart; A. Voronin


Archive | 1999

The advanced thin ionization calorimeter (ATIC) for studies of high energy cosmic rays

T. G. Guzik; J. Adams; G. Ampe; G. L. Bashindzhagyan; P. Boberg; Gary Lee Case; J. Chang; Steven B. Ellison; A. R. Fazely; G. A. Samsonov; O. Ganel; R. Gould; D. Granger; R. M. Gunasingha; J. Isbert; L.A. Khein; M. Kher; D. Khettry; Hyun-Man Kim; K. C. Kim; S.K. Kim; Ig Mo Koo; Y. Kwon; L. Kommajasyula; Richard A. Kroeger; R. Lockwood; R. Mohan; M. I. Panasyuk; B. Price; W. K. H. Schmidt


Archive | 1999

Silicon Matrix Detector for ATIC

James H. Adams; Jeroen Ampe; L. Marlin; David L. Wagner; G. L. Bashindzhagyan; L.A. Khein; E. N. Kuznetsov; M. I. Panasyuk; G. A. Samsonov; A. Voronin; Viktor I. Zatsepin; Gary Lee Case; B. S. Ellison; R. Gould; D. Granger; T. Gregory Guzik; J. Isbert; T. Lemczyk; C. Oubre; B. Price; Mrinal K. Sen; M. Stewart; John P. Wefel; A. Zigura; Hyo-sung Ahn; O. Ganel; T. Kara; K. C. Kim; E. S. Seo; R. Sina


Proceedings of the Tenth International Conference | 2003

ATIC, A BALLOON BORNE CALORIMETER FOR COSMIC RAY MEASUREMENTS

J. Isbert; Gary Lee Case; D. Granger; T. G. Guzik; B. Price; M. Stewart; J. P. Wefel; J. Adams; Mark J. Christl; H. S. Ahn; O. Ganel; K. C. Kim; S.A. Naqvi; E. S. Seo; R. Sina; J. Z. Wang; J. Wu; A. R. Fazely; R. M. Gunasingha; Yong Han; Hyun-Man Kim; S.K. Kim; G. L. Bashindzhagyan; E. N. Kouznetsov; M. I. Panasyuk; A. D. Panov; G. A. Samsonov; N. V. Sokolskaya; A. Voronin; Viktor I. Zatsepin


Archive | 2010

Ground-Based Observations of Terrestrial Gamma-Ray Flashes

Rebecca Ringuette; N. Cannady; Gary Lee Case; Michael L. Cherry; D. Granger; J. Isbert; M. Stewart


Archive | 2007

The Electron Calorimeter (ECAL) Long Duration Balloon Experiment

T. G. Guzik; J. Adams; G. L. Bashindzhagyan; W. R. Binns; J. Chang; M. L. Cherry; Mark J. Christl; P. F. Dowkontt; B. Ellison; J. Isbert; M. H. Israel; N. Korotkova; M. I. Panasyuk; A. D. Panov; N. V. Sokolskaya; M. Stewart; J. W. Watts; P. Wefel; V.I. Zatsepin


Archive | 2002

Preliminary Results of the CNO Concentration in Cosmic Ray Spectrum asMeasured from the ATIC Experiment

R. M. Gunasingha; A. R. Fazely; Gary Lee Case; Stephen M. Elliott; R. Gould; D. Granger; T. Gregory Guzik; J. Isbert; B. Price; Debbie Smith; M. Stewart; J. P. Wefel; James H. Adams; Mark J. Christl; J. Chang; W. K. H. Schmidt; G. L. Bashindzhagyan; E. N. Kouznetsov; Mikhail I. Panasyuk; A. D. Panov; G. Samsomov; N. V. Sokolskaya; A. Voronin; V. Zetsepin; David L. Wagner; E. J. Ahn; Yong Han; Hwan Kim; Sin Kim; Ig Mo Koo


IZVESTIYA AKADEMII NAUK SSSR SERIYA FIZICHESKAYA | 2002

Charge resolution in the ATIC experiment

V.I. Zatsepin; J. Adams; H. S. Ahn; G. L. Bashindzagyan; K. E. Batkov; J. Z. Wang; J. P. Wefel; A. Voronin; J. Wu; O. Ganel; D. Granger; R. M. Gunasingha; T. G. Guzik; J. Isbert; Gary Lee Case; Hyun-Man Kim; K. C. Kim; S.K. Kim; Mark J. Christl; E. N. Kouznetsov; S. A. Naqvi; M. I. Panasyuk; A. D. Panov; B. Price; G. A. Samsonov; N. V. Sokolskaya; E. S. Seo; R. Sina; M. Stewart; A. R. Fazely

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J. Isbert

Louisiana State University

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D. Granger

Louisiana State University

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B. Price

Louisiana State University

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Gary Lee Case

Louisiana State University

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A. R. Fazely

Southern University and A

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T. G. Guzik

Louisiana State University

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J. Adams

Marshall Space Flight Center

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A. D. Panov

Moscow State University

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