High-energy electron observations from 30 GeV to 3 TeV with emulsion chambers

Tadashi Kobayashi, Yoshiko Komori, Kenji Yoshida, Jun Nishimura

Research output: Contribution to conferencePaper

Abstract

We have observed high-energy cosmic-ray electrons from 30 GeV to 3 TeV with emulsion chambers at balloon altitudes, accumulating the total exposure of 8.19 m2.sr.day. In the observations, we have carried out particle identification event by event with a proton rejection power of 1×105 in TeV region, which is one of the outstanding capabilities of the emulsion chambers. The performance of the emulsion chambers was examined by accelerator beam tests at CERN-SPS and Monte-Carlo simulations. We also estimated the atmospheric electron spectra in a reliable way, and carried out on-board calibrations by using flight data. In the study of cosmic-ray electrons, it is indicated that highenergy electrons above a few 100 GeV are a powerful probe to identify nearby cosmic-ray sources and search for dark matter. In this paper, we present the final result of energy spectrum of high-energy cosmic-ray electrons observed with emulsion chambers in the energy range from 30 GeV to 3 TeV.

Original languageEnglish
Pages63-66
Number of pages4
DOIs
Publication statusPublished - 2011 Jan 1
Event32nd International Cosmic Ray Conference, ICRC 2011 - Beijing, China
Duration: 2011 Aug 112011 Aug 18

Conference

Conference32nd International Cosmic Ray Conference, ICRC 2011
CountryChina
CityBeijing
Period11/8/1111/8/18

Keywords

  • Balloon
  • Cosmic-ray electrons
  • Supernova remnants

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Kobayashi, T., Komori, Y., Yoshida, K., & Nishimura, J. (2011). High-energy electron observations from 30 GeV to 3 TeV with emulsion chambers. 63-66. Paper presented at 32nd International Cosmic Ray Conference, ICRC 2011, Beijing, China. https://doi.org/10.7529/ICRC2011/V06/0805