Search for shadowing of primary cosmic radiation by the moon at TeV energies

Citation
D. Pomarede et al., Search for shadowing of primary cosmic radiation by the moon at TeV energies, ASTROPART P, 14(4), 2001, pp. 287-317
Citations number
46
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPARTICLE PHYSICS
ISSN journal
0927-6505 → ACNP
Volume
14
Issue
4
Year of publication
2001
Pages
287 - 317
Database
ISI
SICI code
0927-6505(200101)14:4<287:SFSOPC>2.0.ZU;2-Y
Abstract
The antimatter research through the earth moon ion spectrometer (ARTEMIS) e xperiment is described in terms of searching for the moon's shadow in the p rimary cosmic radiation at TeV energies. Observations were made using the W hipple 10 m Imaging Atmospheric Cerenkov Telescope, in conjunction with a s pecial optical filter to suppress unwanted moonlight. Monte Carlo simulatio ns were used to predict that the magnitude of shadowing based on a pure pro ton beam would be 1% of the cosmic ray background. Observations and event c lassification are discussed, and results of a search for shadowing based on both protons and antiprotons are presented. Atmospheric fluctuations givin g rise to non-statistical event rates constituted a limiting factor to the sensitivity of the shadow search as they rivaled or exceeded statistical er rors. It is demonstrated that the experiment does not have sufficient sensi tivity to moon shadowing which would allow a search for an antimatter compo nent in the primary cosmic ray flux at the percent level. Possible future i mprovements of the technique are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.