995 research outputs found
Online monitoring system and data management for KamLAND
In January 22, 2002, KamLAND started the data-taking. The KamLAND detector is
a complicated system which consists of liquid scintillator, buffer oil,
spherical balloon and so on. In order to maintain the detector safety, we
constructed monitoring system which collect detector status information such as
balloon weight, liquid scintillator oil level and so on. In addition, we
constructed continuous Rn monitoring system for the Be solar neutrino
detection. The KamLAND monitoring system consists of various network, LON,
1-Wire, and TCP/IP, and these are indispensable for continuous experimental
data acquisition.Comment: Submitted to Nucl.Instrum.Meth.
Systematic limits on sin^2{2theta_{13}} in neutrino oscillation experiments with multi-reactors
Sensitivities to sin^2{2theta_{13}} without statistical errors (``systematic
limit'') are investigated in neutrino oscillation experiments with multiple
reactors. Using an analytical approach, we show that the systematic limit on
sin^2{2theta_{13}} is dominated by the uncorrelated systematic error sigma_u of
the detector. Even in an experiment with multi-detectors and multi-reactors, it
turns out that most of the systematic errors including the one due to the
nature of multiple sources is canceled as in the case with a single reactor
plus two detectors, if the near detectors are placed suitably. The case of the
KASKA plan (7 reactors and 3 detectors) is investigated in detail, and it is
explicitly shown that it does not suffer from the extra uncertainty due to
multiple reactors.Comment: 26 pages, 10 eps-files, revtex
Theory and Design of Contemporary Architecture: Towards Reintegration of Generality and Peculiarity
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