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Cosmic Ray Isotope Measurements using the Cherenkov-Rigidity Technique in ISOMAX

de Nolfo, G. A. and Barbier, L. M. and Bremerich, M. and Christian, E. R. and Davis, A. J. 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 Mitchell, J. W. and Ormes, J. F. and Rasmussen, I. L. and Schindler, S. M. and Simon, M. and Streitmatter, R. E. (1999) Cosmic Ray Isotope Measurements using the Cherenkov-Rigidity Technique in ISOMAX. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.3. International Union of Pure and Applied Physics , pp. 29-32.

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The Isotope Magnet Experiment, ISOMAX, which had its first flight in August 1998, is designed to measure the isotopic composition of the light elements using a complement of three major detector systems: a magnetic spectrometer, a time-of-flight (TOF) system, and two Cherenkov detectors. ISOMAX measures mass by combining the velocity measurement with charge and magnetic rigidity (momentum/charge) measurements. In the energy range from 1.1 to 1.7 GeV/nucleon, the velocity measurements are provided by two aerogel Cherenkov counters. The aerogel radiators have a nominal index-of-refraction n = 1.14 corresponding to an energy threshold of 1.08 Ge V /nucleon, which complements and extends the energy range covered by the TOF. Combining the velocity measurement with a measurement of rigidity results in a determination of isotope mass with an expected resolution of ::;: 0.25 amu. We present preliminary isotope data.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
de Nolfo, G. A.0000-0002-3677-074X
Christian, E. R.0000-0003-2134-3937
Geier, S.0000-0002-3948-9339
Hof, M.0000-0003-2884-3037
Mewaldt, R. A.0000-0003-2178-9111
Additional Information:© University of Utah. Provided by the NASA Astrophysics Data System.
Group:Space Radiation Laboratory
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1999-45
Record Number:CaltechAUTHORS:20150217-132931465
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54876
Deposited By: Deborah Miles
Deposited On:20 Feb 2015 03:00
Last Modified:09 Mar 2020 13:19

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