Speaker
Keiichi Mase
(Chiba University)
Description
Askaryan Radio Array (ARA) is being built at the South Pole aiming
for observing high energy cosmogenic neutrinos above 10 PeV.
The ARA detector identifies the radio emissions from the excess
charge in a particle shower induced by a neutrino interaction. Such
a radio emission was first predicted by Askaryan in 1962 and
experimentally confirmed by Saltzberg et al. using the SLAC accelerator
in 2000. In the ARAcalTA experiment, we irradiated an ice target with
40 MeV electron beams using the Telescope Array Electron Light Source
located in an radio quiet open-air environment to verify our understanding
of the Askaryan emission and the detector responses used in the ARA
experiment. Observed signals include two kind of backgrounds:
transition radiations from the boundary between air and ice, and radio
emissions from the sudden beam appearance. We measure coherences,
polarizations and angular distributions of the radio signals to quantify
each components in the observed signals. The recorded waveforms
are then compared with simulation which includes all the calibration
information obtained in a laboratory to verify the detector responses.
The first observational results from ARAcalTA will be presented in the
conference
| Registration number following "ICRC2015-I/" | 422 |
|---|---|
| Collaboration | ARA |
Primary author
Keiichi Mase
(Chiba University)
Co-authors
Aya Ishihara
(Chiba University)
Bokkyun Shin
(Hanyang University)
Daisuke Ikeda
(Institute for Cosmic Ray Research, University of Tokyo)
Gordon Thomson
(University of Utah)
Hiroyuki Sagawa
(RIKEN)
Prof.
John Matthews
(University of Utah)
Masaki Fukushima
(U)
Matthew Ryan Relich
(Chiba University)
Romain Gaior
(Chiba University)
Shigeru Yoshida
(Chiba University)
Shunsuke Ueyama
(Chiba University)
Takao Kuwabara
(Chiba University)
Tatsunobu Shibata
(KEK)
