A Caltech Library Service

Extended Energy Elemental Spectrum Measurements with the Solar Isotope Spectrometer (SIS)

Labrador, A. W. and Cohen, C. M. S. and Cummings, A. C. and Leske, R. A. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (2005) Extended Energy Elemental Spectrum Measurements with the Solar Isotope Spectrometer (SIS). In: Proceedings fo the 29th International Cosmic Ray Conference. Vol.1. Tata Institute of Fundamental Research , Mumbai, India, pp. 103-106.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The Solar Isotope Spectrometer (SIS) aboard the Advanced Composition Explorer (ACE) has been measuring solar energetic particle abundances since ACE was launched in August 1997. SIS is a silicon detector telescope that identifies charged particles via the multiple dE/dx vs. total energy technique, and to date, most measurements reported by SIS have been limited in energy to those particles that stop in the instrument. In this paper, we will summarize the multiple dE/dx technique used to identify particles that penetrate through the bottom of SIS, extending the energy ranges for elemental abundance measurements. In preliminary analysis, the upper energy limit for oxygen has been extended from ~90 MeV/nuc for stopping particles to ~300 MeV/nuc for penetrating particles, and the upper energy limit for iron has been extended from ~168 MeV/nuc to ~500 MeV/nuc. We apply this technique to SIS measurements of large SEP events, such as the Nov. 6, 1997 event and the recent Jan. 20, 2005 event, to extend the measured spectra, to look for evidence of spectral breaks.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Labrador, A. W.0000-0001-9178-5349
Cohen, C. M. S.0000-0002-0978-8127
Cummings, A. C.0000-0002-3840-7696
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Wiedenbeck, M. E.0000-0002-2825-3128
Additional Information:© 2005 Tata Institute of Fundamental Research. This work was supported by NASA grant NAG5-6912.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2005-12
Record Number:CaltechAUTHORS:20140827-135112110
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48997
Deposited By: Tony Diaz
Deposited On:03 Sep 2014 14:18
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page