Publications (12)
The High Energy Light Isotope eXperiment program of direct cosmic-ray studies
HELIX Collaboration, S. Coutu, P. S. Allison +27
HELIX is a new NASA-sponsored instrument aimed at measuring the spectra and composition of light cosmic-ray isotopes from hydrogen to neon nuclei, in particular the clock isotopes…
Proton and Helium Spectra from the CREAM-III Flight
Y. S. Yoon, T. Anderson, A. Barrau +22
Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) fle…
Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight
Y. S. Yoon, H. S. Ahn, P. S. Allison +31
Cosmic-ray proton and helium spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass experiment flown for 42 days in Antarctica in the 2004-2005 austral su…
Energy cross-calibration from the first CREAM flight: transition radiation detector versus calorimeter
P. Maestro, H. S. Ahn, P. S. Allison +35
The Cosmic Ray Energetics And Mass (CREAM) balloon experiment had two successful flights in 2004/05 and 2005/06. It was designed to perform energy measurements from a few GeV up to…
Measurement of the Cosmic-Ray Antiproton to Proton Abundance Ratio between 4 and 50 GeV
A. S. Beach, J. J. Beatty, A. Bhattacharyya +13
We present a new measurement of the antiproton to proton abundance ratio, pbar/p, in the cosmic radiation. The HEAT-pbar instrument, a balloon borne magnet spectrometer with precis…
Elemental energy spectra of cosmic rays measured by CREAM-II
P. Maestro, H. S. Ahn, P. Allison +30
We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment CREAM (Cosmic Ray Energetics And Mass). The instr…
Measurements of cosmic-ray energy spectra with the 2nd CREAM flight
P. Maestro, H. S. Ahn, P. Allison +30
During its second Antarctic flight, the CREAM (Cosmic Ray Energetics And Mass) balloon experiment collected data for 28 days, measuring the charge and the energy of cosmic rays (CR…
The High-Energy Light Isotope eXperiment (HELIX) Instrument
P. S. Allison, M. Baiocchi, J. J. Beatty +27
The HELIX detector is a balloon-borne instrument designed to measure the flux of light (Z < 11) cosmic-ray isotopes. In this paper we describe the initial configuration of HELIX, o…
Elemental Spectra from the CREAM-I Flight
H. S. Ahn, P. Allison, M. G. Bagliesi +32
The Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment designed to measure the composition and energy spectra of cosmic rays of charge Z = 1 to 26 up to an energy…
Electron-beam Calibration of Aerogel Tiles for the HELIX RICH Detector
P. Allison, M. Baiocchi, J. J. Beatty +21
The HELIX cosmic-ray detector is a balloon-borne instrument designed to measure the flux of light isotopes in the energy range from 0.2 GeV/n to beyond 3 GeV/n. It will rely on a r…
Energy spectra of cosmic-ray nuclei at high energies
H. S. Ahn, P. Allison, M. G. Bagliesi +30
We present new measurements of the energy spectra of cosmic-ray (CR) nuclei from the second flight of the balloon-borne experiment Cosmic Ray Energetics And Mass (CREAM). The instr…
New Measurement of the Cosmic-Ray Positron Fraction from 5 to 15 GeV
J. J. Beatty, A. Bhattacharyya, C. Bower +12
We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-pbar instrument in the spring of 2000. The data presen…