The absolute flux of protons and helium at the top of the atmosphere using IMAX

W. Menn; M. Hof; O. Reimer; M. Simon; A.J. Davis; A.E. Labrador; R.A. Mewaldt; S.M. Schindler; L.M. Barbier; E.R. Christian; K.E. Krombel; J.F. Krizmanic; J.W. Mitchell; J.F. Ormes; R.E. Streitmatter; R.L. Golden; S.J. Stochaj; W.R. Webber; Ib Lundgaard Rasmussen

The absolute flux of protons and helium at the top of the atmosphere using IMAX

W. Menn, M. Hof, O. Reimer, M. Simon, A.J. Davis, A.E. Labrador, R.A. Mewaldt, S.M. Schindler, L.M. Barbier, E.R. Christian, K.E. Krombel, J.F. Krizmanic, J.W. Mitchell, J.F. Ormes, R.E. Streitmatter, R.L. Golden, S.J. Stochaj, W.R. Webber, Ib Lundgaard Rasmussen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

The cosmic-ray proton and helium spectra from 0.2 GeV nucleon(-1) to about 200 GeV nucleon(-1) have been measured with the balloon-borne experiment Isotope Matter-Antimatter Experiment (IMAX) launched from Lynn Lake, Manitoba, Canada, in 1992. IMAX was designed to search for antiprotons and light isotopes using a superconducting magnet spectrometer together with scintillators, a time-of-flight system, and Cherenkov detectors. Using redundant detectors, an extensive examination of the instrument efficiency was carried out. We present here the absolute spectra of protons and helium corrected to the top of the atmosphere and to interstellar space. If demodulated with a solar modulation parameter of phi = 750 MV, the measured interstellar spectra between 20 and 200 GV can be represented by a power law in rigidity, with (1.42 +/- 0.21) x 10(4)R(-2.71+/-0.04) (m(2) GV s sr)(-1) for protons and (3.15 +/- 1.03) x 10(3)R(-2.79+/-0.08) (m(2) GV s sr)(-1) for helium.

Original language	English
Journal	Astrophysical Journal
Volume	533
Issue number	1
Pages (from-to)	281-297
ISSN	0004-637X
Publication status	Published - 2000

Keywords

ISM : abundances
elementary particles
cosmic rays

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Menn, W., Hof, M., Reimer, O., Simon, M., Davis, A. J., Labrador, A. E., Mewaldt, R. A., Schindler, S. M., Barbier, L. M., Christian, E. R., Krombel, K. E., Krizmanic, J. F., Mitchell, J. W., Ormes, J. F., Streitmatter, R. E., Golden, R. L., Stochaj, S. J., Webber, W. R., & Rasmussen, I. L. (2000). The absolute flux of protons and helium at the top of the atmosphere using IMAX. Astrophysical Journal, 533(1), 281-297.

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title = "The absolute flux of protons and helium at the top of the atmosphere using IMAX",

abstract = "The cosmic-ray proton and helium spectra from 0.2 GeV nucleon(-1) to about 200 GeV nucleon(-1) have been measured with the balloon-borne experiment Isotope Matter-Antimatter Experiment (IMAX) launched from Lynn Lake, Manitoba, Canada, in 1992. IMAX was designed to search for antiprotons and light isotopes using a superconducting magnet spectrometer together with scintillators, a time-of-flight system, and Cherenkov detectors. Using redundant detectors, an extensive examination of the instrument efficiency was carried out. We present here the absolute spectra of protons and helium corrected to the top of the atmosphere and to interstellar space. If demodulated with a solar modulation parameter of phi = 750 MV, the measured interstellar spectra between 20 and 200 GV can be represented by a power law in rigidity, with (1.42 +/- 0.21) x 10(4)R(-2.71+/-0.04) (m(2) GV s sr)(-1) for protons and (3.15 +/- 1.03) x 10(3)R(-2.79+/-0.08) (m(2) GV s sr)(-1) for helium.",

keywords = "ISM : abundances, elementary particles, cosmic rays",

author = "W. Menn and M. Hof and O. Reimer and M. Simon and A.J. Davis and A.E. Labrador and R.A. Mewaldt and S.M. Schindler and L.M. Barbier and E.R. Christian and K.E. Krombel and J.F. Krizmanic and J.W. Mitchell and J.F. Ormes and R.E. Streitmatter and R.L. Golden and S.J. Stochaj and W.R. Webber and Rasmussen, {Ib Lundgaard}",

year = "2000",

language = "English",

volume = "533",

pages = "281--297",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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Menn, W, Hof, M, Reimer, O, Simon, M, Davis, AJ, Labrador, AE, Mewaldt, RA, Schindler, SM, Barbier, LM, Christian, ER, Krombel, KE, Krizmanic, JF, Mitchell, JW, Ormes, JF, Streitmatter, RE, Golden, RL, Stochaj, SJ, Webber, WR & Rasmussen, IL 2000, 'The absolute flux of protons and helium at the top of the atmosphere using IMAX', Astrophysical Journal, vol. 533, no. 1, pp. 281-297.

TY - JOUR

T1 - The absolute flux of protons and helium at the top of the atmosphere using IMAX

AU - Menn, W.

AU - Hof, M.

AU - Reimer, O.

AU - Simon, M.

AU - Davis, A.J.

AU - Labrador, A.E.

AU - Mewaldt, R.A.

AU - Schindler, S.M.

AU - Barbier, L.M.

AU - Christian, E.R.

AU - Krombel, K.E.

AU - Krizmanic, J.F.

AU - Mitchell, J.W.

AU - Ormes, J.F.

AU - Streitmatter, R.E.

AU - Golden, R.L.

AU - Stochaj, S.J.

AU - Webber, W.R.

AU - Rasmussen, Ib Lundgaard

PY - 2000

Y1 - 2000

N2 - The cosmic-ray proton and helium spectra from 0.2 GeV nucleon(-1) to about 200 GeV nucleon(-1) have been measured with the balloon-borne experiment Isotope Matter-Antimatter Experiment (IMAX) launched from Lynn Lake, Manitoba, Canada, in 1992. IMAX was designed to search for antiprotons and light isotopes using a superconducting magnet spectrometer together with scintillators, a time-of-flight system, and Cherenkov detectors. Using redundant detectors, an extensive examination of the instrument efficiency was carried out. We present here the absolute spectra of protons and helium corrected to the top of the atmosphere and to interstellar space. If demodulated with a solar modulation parameter of phi = 750 MV, the measured interstellar spectra between 20 and 200 GV can be represented by a power law in rigidity, with (1.42 +/- 0.21) x 10(4)R(-2.71+/-0.04) (m(2) GV s sr)(-1) for protons and (3.15 +/- 1.03) x 10(3)R(-2.79+/-0.08) (m(2) GV s sr)(-1) for helium.

AB - The cosmic-ray proton and helium spectra from 0.2 GeV nucleon(-1) to about 200 GeV nucleon(-1) have been measured with the balloon-borne experiment Isotope Matter-Antimatter Experiment (IMAX) launched from Lynn Lake, Manitoba, Canada, in 1992. IMAX was designed to search for antiprotons and light isotopes using a superconducting magnet spectrometer together with scintillators, a time-of-flight system, and Cherenkov detectors. Using redundant detectors, an extensive examination of the instrument efficiency was carried out. We present here the absolute spectra of protons and helium corrected to the top of the atmosphere and to interstellar space. If demodulated with a solar modulation parameter of phi = 750 MV, the measured interstellar spectra between 20 and 200 GV can be represented by a power law in rigidity, with (1.42 +/- 0.21) x 10(4)R(-2.71+/-0.04) (m(2) GV s sr)(-1) for protons and (3.15 +/- 1.03) x 10(3)R(-2.79+/-0.08) (m(2) GV s sr)(-1) for helium.

KW - ISM : abundances

KW - elementary particles

KW - cosmic rays

M3 - Journal article

VL - 533

SP - 281

EP - 297

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

ER -

The absolute flux of protons and helium at the top of the atmosphere using IMAX

Abstract

Keywords

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