Oscillation
Project
with Emulsion-tRacking
Apparatus
Welcome to the OPERA Web Home Page
OPERA is a massive lead/emulsion target for a long-baseline neutrino oscillation
search. The experiment can perform an appearance search for nm-ntoscillation
in the parameter region indicated by the atmospheric neutrino anomaly.
It exploits nuclear emulsion for the unambiguous detection of the decay
of the t produced in ntCC
interactions. OPERA will run at the LNGS
in the future NGS neutrino beam from CERN.
A detector target mass of ~1 kton is needed to reach a sensitivity in
Dm2
of 10-3 eV2 . Such a goal, impossible to reach with
pure emulsion target, is achieved by means of a new technique based on
the Emulsion Cloud Chamber (ECC). The ECC provides a massive target made
up of a sandwich of dense passive material (Fe, Pb) plates and thin emulsion
sheets. The emulsion is used only for tracking and t
decays are identified by a direct kink detection.
A fully scalable detector can be built on the basis of supermodules,
consisting of a target section followed by a muon detection system for
background reduction. The target is subdivided into "bricks", consisting
of a sequence of elementary cells,
arranged in a plane structure. Electronic detectors, placed behind each
target module, are needed to identify the actual brick where the neutrino
interaction took place and to guide the scanning.
The
(present) Collaboration:
Aichi Educational University, Aichi, Japan
METU, Ankara, Turkey
LAPP and Université de Savoie, Annecy, France
INFN and Bari University, Bari, Italy
Bern University, Bern, Switzerland
IIHE (ULB-VUB), Brussels,
Belgium
Laboratori Nazionali di Frascati,
INFN Frascati, Italy
Toho University, Funabashi, Japan
CERN, Geneva, Switzerland
Technion, Haifa, Israel
Hamburg
University, Hamburg, Germany
Kobe University, Kobe, Japan
IPNL and Université C.Bernard, Lyon, France
ITEP, Moscow, Russia
Muenster University, Muenster,
Germany
Nagoya University, Nagoya,
Japan
INFN
and "Federico II" University, Naples, Italy
LAL and Université Paris-Sud, Orsay, France
INFN and "La Sapienza"
University, Rome, Italy
INFN and Salerno University, Salerno, Italy
Utsunomiya University, Utsunomiya, Japan
Mailing
lists
Reference
material:
Original
Letter of Intents
(n.b. the experimental features, the sensitivity, the background estimate
etc. have been updated since the LoI, as described in the Addendum)
OPERA
980722-01
Note on the optimization of the NGS neutrino beam, jointly prepared
by members of ICARUS and OPERA Collaborations, Aug 10, 1998
CERN/SPSC
98-25, LNGS-LOI 8/97, Add.1
Addendum to the Letter of Intents, Oct 9, 1998
CERN/SPSC 99-20, SPSC/M635, LNGS-LOI 19/99
Progress Report, Aug 27, 1999
CERN/SPSC 99-38, SPSC/M641, LNGS-LOI 19/99, Add.1
Addendum to the Progress Report, Nov 18, 1999
OPERA
Internal
Related
Links:
NGS Project at CERN
CERN
98-02 The CERN neutrino beam to Gran Sasso (NGS)
Minutes
of the joint SPSC-LNGSC meeting held at CERN on November 3-4, 1998.
Long
Baseline Newsletter
Neutrino
Oscillation Industry
Giuliana
Fiorillo