GPS survey in long baseline neutrino-oscillation measurement

H. Noumi, M. Ieiri, T. Inagaki, T. Hasegawa, Y. Katoh, M. Kohama, M. Kurodai, E. Kusano, T. Maruyama, M. Minakawa, K. Nakamura, K. Nishikawa, Makoto Sakuda, Y. Suzuki, M. Takasaki, K. H. Tanaka, Y. Yamanoi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We made a series of surveys to obtain neutrino beam line direction toward SuperKamiokande (SK) at a distance of 250 km for the long-baseline neutrino oscillation experiment at KEK. We found that the beam line is directed to SK within 0.03 mr and 0.09 mr (in sigma) in the horizontal and vertical directions, respectively. During beam operation, we monitored the muon distribution from secondary pions produced at the target and collected by a magnetic horn system. We found that the horn system functions like a lens of a point-to-parallel optics with magnification of approximately - 100 and the focal length of 2.3 m. Namely, a small displacement of the. primary beam position at the target is magnified about a factor - 100 at the muon centroid, while the centroid position is almost stable against a change of the incident angle of the primary beam. Therefore, the muon centroid can be a useful monitor of the neutrino beam direction. We could determine the muon centroid within 6 mm and 12 mm hi horizontal and vertical directions, respectively. This means that the neutrino beam direction could be controlled within 0.03 mr and 0.06 mr (in sigma) in the horizontal and vertical directions, respectively. We confirmed the beam direction with the neutrino distribution reconstructed at the near detector in KEK.

Original languageEnglish
Pages (from-to)2245-2249
Number of pages5
JournalIEEE Transactions on Nuclear Science
Volume51
Issue number5 I
DOIs
Publication statusPublished - Oct 2004
Externally publishedYes

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Global positioning system
Lenses
Optics
neutrinos
Detectors
oscillations
centroids
neutrino beams
muons
Experiments
magnification
monitors
pions
lenses
optics
detectors

Keywords

  • Beams
  • Global Positioning System
  • Neutrinos

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

Cite this

Noumi, H., Ieiri, M., Inagaki, T., Hasegawa, T., Katoh, Y., Kohama, M., ... Yamanoi, Y. (2004). GPS survey in long baseline neutrino-oscillation measurement. IEEE Transactions on Nuclear Science, 51(5 I), 2245-2249. https://doi.org/10.1109/TNS.2004.836042

GPS survey in long baseline neutrino-oscillation measurement. / Noumi, H.; Ieiri, M.; Inagaki, T.; Hasegawa, T.; Katoh, Y.; Kohama, M.; Kurodai, M.; Kusano, E.; Maruyama, T.; Minakawa, M.; Nakamura, K.; Nishikawa, K.; Sakuda, Makoto; Suzuki, Y.; Takasaki, M.; Tanaka, K. H.; Yamanoi, Y.

In: IEEE Transactions on Nuclear Science, Vol. 51, No. 5 I, 10.2004, p. 2245-2249.

Research output: Contribution to journalArticle

Noumi, H, Ieiri, M, Inagaki, T, Hasegawa, T, Katoh, Y, Kohama, M, Kurodai, M, Kusano, E, Maruyama, T, Minakawa, M, Nakamura, K, Nishikawa, K, Sakuda, M, Suzuki, Y, Takasaki, M, Tanaka, KH & Yamanoi, Y 2004, 'GPS survey in long baseline neutrino-oscillation measurement', IEEE Transactions on Nuclear Science, vol. 51, no. 5 I, pp. 2245-2249. https://doi.org/10.1109/TNS.2004.836042
Noumi H, Ieiri M, Inagaki T, Hasegawa T, Katoh Y, Kohama M et al. GPS survey in long baseline neutrino-oscillation measurement. IEEE Transactions on Nuclear Science. 2004 Oct;51(5 I):2245-2249. https://doi.org/10.1109/TNS.2004.836042
Noumi, H. ; Ieiri, M. ; Inagaki, T. ; Hasegawa, T. ; Katoh, Y. ; Kohama, M. ; Kurodai, M. ; Kusano, E. ; Maruyama, T. ; Minakawa, M. ; Nakamura, K. ; Nishikawa, K. ; Sakuda, Makoto ; Suzuki, Y. ; Takasaki, M. ; Tanaka, K. H. ; Yamanoi, Y. / GPS survey in long baseline neutrino-oscillation measurement. In: IEEE Transactions on Nuclear Science. 2004 ; Vol. 51, No. 5 I. pp. 2245-2249.
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AU - Kohama, M.

AU - Kurodai, M.

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AU - Nishikawa, K.

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