| 日時: |
2012-05-22 16:00 - 17:00 |
| 場所: |
Seminar Hall at KEK building No.3 (1st floor) |
| 会議名: |
物理セミナー / India-Based neutrino Observatory (INO) Project |
| 連絡先: |
Takasumi Maruyama |
| 講演者: |
Naba K Mondal (Tata Institute of Fundamental Research) |
| 講演言語: |
英語 |
| アブストラクト: |
India-based Neutrino Observatory (INO)
is a proposed underground facility in
the southern part of India. The project
envisage the construction of an
underground laboratory with a large
cavern of dimensions 132m X 26m X 20m
to house a 50 kton magnetized iron
tracking calorimeter detector (ICAL) to
study atmospheric neutrinos. In
addition, two smaller caverns will
also be constructed to host other
experiments. There will be at least 1.2
km rock overburden in all directions.
INO-ICAL detector will have a modular
structure of total lateral size 48m x
16m and will consist of a stack of 150
horizontal layers of 5.6 cm thick
magnetized iron plates interleaved with
4 cm gaps to house the active detector
layers. The active detector elements
are resistive plate chambers (RPCs),
made up of a pair of 3mm thick glass
plates of area 2m x 2m, separated by
2mm spacers.
The main physics goals of INO-ICAL detector are:
(i) Reconfirmation with greater
statistical significance the first
oscillation dip in L/E of the
atmospheric neutrinos, and measure
|Delta_31|~|Delta m_atm^2| and sin^2(2theta_23) precisely.
(ii) Determine the sign of
Delta m_31^2 and hence the neutrino
mass hierarchy using matter effect.
(iii) Measure the deviation of theta_23
from maximality, and resolve the octant
ambiguity.
(iv) Distinguish (nu_mu<->nu_tau) from (nu_mu<->nu_s) oscillation from
muonless events.
(v) Search for CPT violation.
This detector can also be used as an
end detector at the magic base line of
7000 km with a neutrino factory. The
present status of the project and the
progress made so far will be discussed.
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