Abstract
We carried out a balloon observation of cosmic rays with a prototype of the CALET (bCALET-1) at the Sanriku Balloon Center of the Japan Aerospace Exploration Agency. The main purpose of the experiment was verification of the CALET. The detector consists of 1024 scintillating fibers for precise imaging and 24 BGO scintillator for total absorption of showers. The observation was carried at an altitude between 35 and 37 km for about 3.5 hours. We measured electrons in the energy region between 1 to 10 GeV. The prototype system was verified in the balloon environment. We have obtained the electron flux which is useful to investigate solar modulation. In combination with the flux between 10 to 100GeV measured by BETS, rigidity cutoff effect was clearly observed. These results showed good agreement with that of our Monte-Carlo simulation and demonstrated the detection capability of the CALET in the enegy region below 10 GeV. Now we are planning a series of balloon experiments with larger-scale detectors and longer-duration flights, which include one-month observation by a super-pressure balloon.
| Original language | English |
|---|---|
| Pages (from-to) | 165-168 |
| Number of pages | 4 |
| Journal | journal of the physical society of japan |
| Volume | 78 |
| Issue number | SUPPL. A |
| DOIs | |
| Publication status | Published - 2009 |
Keywords
- Balloon experiment
- Electron
- High energy cosmic ray
ASJC Scopus subject areas
- Physics and Astronomy(all)