J. D. Smith
University of Utah
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by J. D. Smith.
Physical Review Letters | 2004
R. Abbasi; T. Abu-Zayyad; J.F. Amann; G. Archbold; J. A. Bellido; K. Belov; J.W. Belz; D. R. Bergman; Z. Cao; R. W. Clay; M.D. Cooper; H. Dai; B. R. Dawson; Adam A. Everett; Yu. A. Fedorova; J.H.V. Girard; R.C. Gray; W. Hanlon; C. M. Hoffman; M. H. Holzscheiter; P. Hüntemeyer; B.F. Jones; Charles C. H. Jui; D. Kieda; K. Kim; M. A. Kirn; E. C. Loh; N. Manago; L.J. Marek; K. Martens
We have measured the cosmic ray spectrum above 10^17.2 eV using the two air fluorescence detectors of the High Resolution Flys Eye observatory operating in monocular mode. We describe the detector, photo-tube and atmospheric calibrations, as well as the analysis techniques for the two detectors. We fit the spectrum to a model consisting of galactic and extra-galactic sources.
Astroparticle Physics | 2005
R. Abbasi; T. Abu-Zayyad; J.F. Amman; G. Archbold; J. A. Bellido; K. Belov; J.W. Belz; D. R. Bergman; Z. Cao; R. W. Clay; M.D. Cooper; Hongyue Dai; B. R. Dawson; Adam A. Everett; J.H.V. Girard; R.C. Gray; W. Hanlon; C. M. Hoffman; M. H. Holzscheiter; P. Hüntemeyer; B.F. Jones; Charles C. H. Jui; D. Kieda; K. Kim; M. A. Kirn; E. C. Loh; N. Manago; L.J. Marek; K. Martens; G. Martin
We have measured the spectrum of UHE cosmic rays using the Flash ADC (FADC) detector (called HiRes-II) of the High Resolution Flys Eye experiment running in monocular mode. We describe in detail the data analysis, development of the Monte Carlo simulation program, and results. We also describe the results of the HiRes-I detector. We present our measured spectra and compare them with a model incorporating galactic and extragalactic cosmic rays. Our combined spectra provide strong evidence for the existence of the spectral feature known as the ``ankle.
Physics Letters B | 2005
R. Abbasi; T. Abu-Zayyad; J.F. Amman; G. Archbold; R. Atkins; J. A. Bellido; K. Belov; J.W. Belz; S.Y. Ben Zvi; D. R. Bergman; G. W. Burt; Z. Cao; R. W. Clay; B.C. Connolly; W. Deng; B. R. Dawson; Y. Fedorova; J. Findlay; C.B. Finley; W. Hanlon; C. M. Hoffman; G. Hughes; M. H. Holzscheiter; P. Hüntemeyer; Charles C. H. Jui; K. Kim; M. A. Kirn; E.G. Loh; M.M. Maestas; N. Manago
We have measured the cosmic ray spectrum at energies above
Astroparticle Physics | 2006
J.W. Belz; Z. Cao; P. Huentemeyer; Charles C. H. Jui; K. Martens; J. N. Matthews; M. Maestas; J. D. Smith; P. Sokolsky; R.W. Springer; J. Thomas; S.B. Thomas; Pisin Chen; C. Field; C. Hast; R. Iverson; J. Ng; A. Odian; K. Reil; H. Vincke; D. Walz; A. Goldammer; D. Guest; G. B. Thomson; F.-Y. Chang; Chih-Ching Chen; Chien-Wen Chen; M.A. Huang; W-Y. Pauchy Hwang; Guey-Lin Lin
10^{17}
Astroparticle Physics | 2002
P.A Sadowski; A.M van der Zande; R. Abbasi; T. Abu-Zayyad; G. Archbold; J. A. Bellido; K. Belov; J.W. Belz; D. R. Bergman; J. Boyer; Z. Cao; R. W. Clay; B. R. Dawson; Adam A. Everett; J.H.V. Girard; R.C. Gray; W. Hanlon; B.F. Jones; Charles C. H. Jui; D. Kieda; K. Kim; B. C. Knapp; W. Lee; E. C. Loh; K Martens; G. Martin; N. Manago; E.J. Mannel; John A. J. Matthews; J. N. Matthews
eV using the two air fluorescence detectors of the High Resolution Flys Eye experiment operating in monocular mode. We describe the detector, PMT and atmospheric calibrations, and the analysis techniques for the two detectors. We fit the spectrum to models describing galactic and extragalactic sources. Our measured spectrum gives an observation of a feature known as the ``ankle near
The Astrophysical Journal | 1994
D. J. Bird; S. C. Corbato; Hongyue Dai; Bruce R. Dawson; J. W. Elbert; B. L. Emerson; K. D. Green; M.-H. A. Huang; D. Kieda; Ming Luo; S. Ko; Christian Gronhoj Larsen; Eugene C. Loh; M. H. Salamon; J. D. Smith; P. Sokolsky; P. Sommers; J. K. K. Tang; Stan B. Thomas
3times 10^{18}
Archive | 1987
G. L. Cassiday; R. J. Cooper; S. C. Corbato; Bruce R. Dawson; J. W. Elbert; B. Fick; K. D. Green; D. B. Kieda; S. Ko; E. C. Loh; M. H. Salamon; J. D. Smith; P. Sokolsky; S.B. Thomas; B. Wheeler
eV, and strong evidence for a suppression near
Archive | 1990
L. G. Cassiday; R. J. Cooper; C. S. Corbato; R. B. Dawson; W. J. Elbert; B. D. Kieda; S. Ko; C. E. Loh; H. M. Salamon; J. D. Smith; P. Sokolsky; B. V. S. Thomas; Matthew B. Wheeler
6times 10^{19}
Archive | 1990
C. S. Corbato; R. B. Dawson; E. B. Fick; B. D. Kieda; S. Ko; C. E. Loh; H. M. Salamon; J. D. Smith; P. Sommers; P. Sokolsky; B. V. S. Thomas; B. Wheeler
eV.
Archive | 1990
L. G. Cassiday; R. J. Cooper; C. S. Corbato; R. B. Dawson; D. K. Green; B. D. Kieda; S. Ko; F. D. Liebing; C. E. Loh; J. D. Smith; P. Sokolsky; B. V. S. Thomas; B. Wheeler
Measurements are reported on the fluorescence of air as a function of depth in electromagnetic showers initiated by bunches of 28.5 GeV electrons. The light yield is compared with the expected and observed depth profiles of ionization in the showers. It validates the use of atmospheric fluorescence profiles in measuring ultra high energy cosmic rays.
