Proton Flux Anisotropy in the Atmosphere: Experiment and Modeling

Author

Wrobel, F. ; Vaille, J.-R. ; Pantel, Denis ; Dilillo, L. ; Galliere, Jean-Marc ; Touboul, Antoine ; Chadoutaud, Pierre ; Cocquerez, P. ; Lacourty, Michel ; Clair, Marie-Anne ; Autran, Jean-Luc ; Chatry, C. ; Laplanche, Florent ; Azais, Bruno ; Saigne, F.

Author_Institution

Univ. Montpellier 2, Montpellier, France

Volume

60

Issue

4

fYear

2013

fDate

Aug. 2013

Firstpage

2386

Lastpage

2391

Abstract

We investigated the direction distribution of protons around 20 km of altitude by mean of stratospheric balloons. Our detection instrument was based on two large silicon diodes, which were differently tilted. Our measurements show that the proton flux is not isotropic and that protons have a higher probability to have a direction near the vertical axis than near the horizontal axis which proved the proton flux anisotropy. By simulation we then determined an empirical expression for the angular differential fluence of protons.

Keywords

cosmic ray protons; probability; horizontal axis; large silicon diodes; probability; proton angular differential; proton distribution; proton flux anisotropy; stratospheric balloons; vertical axis; Atmospheric measurements; Atmospheric modeling; Azimuth; Detectors; Instruments; Protons; Cosmic rays; protons; real-time test; stratospheric balloons;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2013.2257847

Filename

6515708