Article

Measurement of Electron Spectrum to High Energies with the BESS-1999 Experiment

02/2003;
Source: NTRS

ABSTRACT We present our preliminary electron spectra (e(-)). The data were obtained with the BESS instrument during a balloon flight from Canada in 1999. Electrons constitute less than 1% of the total cosmic radiation. However, due to their small mass they suffer severe energy loss through Bremsstrahlung radiation with the interstellar gas and, synchrotron and inverse Compton processes in galactic magnetic and radiation fields, respectively. As a result, their spectral shape is modified differently than that of nuclei during propagation. Thus, by studying the electron component one can gain additional information on the cosmic ray transport in the Galaxy. The Balloon-borne Experiment with Superconducting Spectrometer (BESS) is designed as a high-resolution spectrometer with a large geometry factor to provide accurate measurements of the galactic cosmic radiation (/Z/ is less than 3).

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Keywords

accurate measurements
 
balloon flight
 
Balloon-borne Experiment
 
Bremsstrahlung radiation
 
cosmic ray transport
 
Electrons
 
galactic cosmic radiation
 
high-resolution spectrometer
 
interstellar gas
 
inverse Compton processes
 
large geometry factor
 
preliminary electron spectra
 
radiation fields
 
severe energy loss
 
small mass
 
spectral shape
 
Superconducting Spectrometer
 
total cosmic radiation
 

T. Hams