ROSES ID: NNH07ZDA001N Selection Year: 2008
Program Element: Focused Science Topic
Principal Investigator: John Bieber
Affiliation(s): University of Delaware
Project Member(s):
Kuwabara, Takao Postdoctoral Associate University of Delaware
Evenson, Paul Arthur Co-I University of Delaware
Summary:
Neutron monitors and muon detectors are ground-based instruments that record the byproducts of collisions between high-energy cosmic rays and molecules in Earth's atmosphere. At energies up to ~100 GeV, primary Galactic cosmic rays experience significant modulation in response to solar wind disturbances. Cosmic rays impacting Earth have passed through and interacted with magnetic fields in a large volume surrounding Earth, and they potentially contain signatures that could be used to predict the magnetic field in various directions. Specifically, the gyroradius of a typical neutron monitor primary cosmic ray is ~0.04 AU and that of a muon detector primary is ~0.2 AU. These correspond to solar wind transit times of ~4 and ~20 hours, which is significantly longer than the ~1 hour warning provided by a sentinel making direct measurements at L1.Performance Year | Reference | Investigation Type | Actions |
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1 | Okazaki, Y.; Fushishita, A.; Narumi, T.; Kato, C.; Y... | not set | |
1 | Fushishita, A.; Kuwabara, T.; Kato, C.; Yasue, S.; B... | not set |
Performance Year | Reference | Actions |
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1 | Braga, Carlos Roberto; Dal Lago, Alisson; Schuch, Nel... | |
1 | Bieber, John W.; Clem, John; Evenson, Paul; Pyle, Ro... | |
1 | Bieber, John W.; Clem, John; Evenson, Paul; Pyle, Ro... | |
1 | Saiz, A.; Ruffolo, D. J.; Bieber, J. W.; Evenson, P... | |
1 | Ruffolo, D. J.; Saiz, A.; Bieber, J. W.; Clem, J. ... | |
1 | Saiz, A.; Ruffolo, D. J.; Bieber, J. W.; Evenson, P... |