Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969.
Evaluation of differential energy spectra for protons and helium covering the energy range from 100 to 260 MeV/nucleon obtained from balloon flights made each summer (1965 to 1969) at Churchill, Manitoba, with the aid of a Geiger-tube hodoscope operated in conjunction with two scintillation elements...
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1971
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ftnasantrs:oai:casi.ntrs.nasa.gov:19720027210 2023-05-15T15:55:06+02:00 Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. Rygg, T. A. Earl, J. A. Unclassified, Unlimited, Publicly available Nov 1, 1971 http://ntrs.nasa.gov/search.jsp?R=19720027210 unknown http://ntrs.nasa.gov/search.jsp?R=19720027210 Accession ID: 72A10876 Copyright Other Sources 29 Journal of Geophysical Research; 76; Nov. 1 AD-745870 1971 ftnasantrs 2012-02-15T10:56:14Z Evaluation of differential energy spectra for protons and helium covering the energy range from 100 to 260 MeV/nucleon obtained from balloon flights made each summer (1965 to 1969) at Churchill, Manitoba, with the aid of a Geiger-tube hodoscope operated in conjunction with two scintillation elements used to measure dE/dx and E. Supplementary data from balloon flights at Minneapolis, Minn., and Sioux Falls, S. Dak. and from calibration exposures to protons and electrons were used to define backgrounds and to verify the predicted detector response. The observed proton spectra are characterized over a wide range of energy (30 to 300 MeV) by a simple relationship between cosmic-ray intensity J and kinetic energy T: J = AT. The helium spectra also follow this law at solar maximum but rise less steeply near solar minimum. This characteristic behavior can be interpreted in terms of a simple model in which convection is balanced by adiabatic deceleration.- Other/Unknown Material Churchill NASA Technical Reports Server (NTRS) Geiger ENVELOPE(-62.900,-62.900,-64.300,-64.300) |
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NASA Technical Reports Server (NTRS) |
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29 Rygg, T. A. Earl, J. A. Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
topic_facet |
29 |
description |
Evaluation of differential energy spectra for protons and helium covering the energy range from 100 to 260 MeV/nucleon obtained from balloon flights made each summer (1965 to 1969) at Churchill, Manitoba, with the aid of a Geiger-tube hodoscope operated in conjunction with two scintillation elements used to measure dE/dx and E. Supplementary data from balloon flights at Minneapolis, Minn., and Sioux Falls, S. Dak. and from calibration exposures to protons and electrons were used to define backgrounds and to verify the predicted detector response. The observed proton spectra are characterized over a wide range of energy (30 to 300 MeV) by a simple relationship between cosmic-ray intensity J and kinetic energy T: J = AT. The helium spectra also follow this law at solar maximum but rise less steeply near solar minimum. This characteristic behavior can be interpreted in terms of a simple model in which convection is balanced by adiabatic deceleration.- |
format |
Other/Unknown Material |
author |
Rygg, T. A. Earl, J. A. |
author_facet |
Rygg, T. A. Earl, J. A. |
author_sort |
Rygg, T. A. |
title |
Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
title_short |
Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
title_full |
Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
title_fullStr |
Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
title_full_unstemmed |
Balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
title_sort |
balloon measurements of cosmic ray protons and helium over half a solar cycle 1965-1969. |
publishDate |
1971 |
url |
http://ntrs.nasa.gov/search.jsp?R=19720027210 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-62.900,-62.900,-64.300,-64.300) |
geographic |
Geiger |
geographic_facet |
Geiger |
genre |
Churchill |
genre_facet |
Churchill |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19720027210 Accession ID: 72A10876 |
op_rights |
Copyright |
_version_ |
1766390442158456832 |