Cosmic ray sun shadow in Soudan 2 underground muon flux.

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Description

The absorption of cosmic rays by the sun produces a shadow at the earth. The angular offset and broadening of the shadow are determined by the magnitude and structure of the interplanetary magnetic field (IPMF) in the inner solar system. The authors report the first measurement of the solar cosmic ray shadow by detection of deep underground muon flux in observations made during the entire ten-year interval 1989 to 1998. The sun shadow varies significantly during this time, with a 3.3{sigma} shadow observed during the years 1995 to 1998.

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6 p.

Creation Information

Allison, W. W. M.; Alner, G. J.; Ayres, D. S.; Barrett, W. L.; Bode, C.; Fields, T. H. et al. June 23, 1999.

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Description

The absorption of cosmic rays by the sun produces a shadow at the earth. The angular offset and broadening of the shadow are determined by the magnitude and structure of the interplanetary magnetic field (IPMF) in the inner solar system. The authors report the first measurement of the solar cosmic ray shadow by detection of deep underground muon flux in observations made during the entire ten-year interval 1989 to 1998. The sun shadow varies significantly during this time, with a 3.3{sigma} shadow observed during the years 1995 to 1998.

Physical Description

6 p.

Notes

OSTI as DE00011873

Medium: P; Size: 6 pages

Source

  • 26th International Cosmic Ray Conference, Salt Lake City, UT (US), 08/17/1999--08/25/1999

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  • Report No.: ANL-HEP-CP-99-60
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11873
  • Archival Resource Key: ark:/67531/metadc621590

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  • June 23, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 12:57 p.m.

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Allison, W. W. M.; Alner, G. J.; Ayres, D. S.; Barrett, W. L.; Bode, C.; Fields, T. H. et al. Cosmic ray sun shadow in Soudan 2 underground muon flux., article, June 23, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc621590/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.