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ISOMAX: Flight Performance of the Isotope Magnet Experiment

Mitchell, J. W. and Barbier, L. M. and Bremerich, M. and Christian, E. R. and Davis, A. J. and de Nolfo, G. A. and Geier, S. and Goebel, H. and Gupta, S. K. and Hams, T. and Hof, M. and Krizmanic, J. F. and Menn, W. and Mewaldt, R. A. and Ormes, J. F. and Schindler, S. M. and Simon, M. and Streitmatter, R. E. and Waddington, C. J. (1999) ISOMAX: Flight Performance of the Isotope Magnet Experiment. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.3. International Union of Pure and Applied Physics , pp. 113-116.

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ISOMAX, a new balloon-borne cosmic ray instrument developed to measure the isotopic composition of the light elements in the cosmic radiation, was flown for the first time on August 4-5, 1998, from Lynn Lake, Manitoba, Canada. The main purpose of the ISOMAX program is to obtain the ratio of radioactive 10Be to stable 9Be over a wide range of energies, and consequently a wide range of time-dilation factors. Configured for its first flight, ISOMAX has a geometry factor of 450 cm^2sr and uses a large, high-field, superconducting magnet in conjunction with state-of-the-art tracking, time-of-flight, and Cherenkov detectors to measure light isotopes with a mass resolution better than 0.25 amu over the ~0.2-1.7 Ge V /nucleon energy range. In the 1998 flight, the maximum detectable rigidity of the ISO MAX magnetic spectrometer was 970 GV/c for He at 60% of the full magnetic field. ISOMAX returned over 16 hours of data from altitudes of more than 36 km as well as considerable data from lower altitudes. In this paper, a description of the instrument and initial isotopic results will be presented. The performance and results from the individual detector systems are discussed in other papers presented at this meeting.

Item Type:Book Section
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URLURL TypeDescription
Christian, E. R.0000-0003-2134-3937
de Nolfo, G. A.0000-0002-3677-074X
Geier, S.0000-0002-3948-9339
Hof, M.0000-0003-2884-3037
Mewaldt, R. A.0000-0003-2178-9111
Additional Information:Copyright 1999 University of Utah. Provided by the NASA Astrophysics Data System.
Group:Space Radiation Laboratory
Record Number:CaltechAUTHORS:20150217-134538369
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54879
Deposited By: Deborah Miles
Deposited On:20 Feb 2015 03:38
Last Modified:09 Mar 2020 13:19

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