UNIVERSITY OF DELAWARE
BARTOL RESEARCH INSTITUTE
NEUTRON MONITOR PROGRAM

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South Pole Sunset 2002 Neutron Monitor in Foreground Welcome ! A neutron monitor is an instrument that measures the number of high-energy particles impacting Earth from space. For historical reasons these particles, mostly protons and helium nuclei, are called "cosmic rays." Because the intensity of cosmic rays hitting Earth is not uniform, it is important to place neutron monitors at multiple locations in order to form a complete picture of cosmic rays in space. Bartol Research Institute currently operates 11 neutron monitors. At this site, you can obtain information about our observing stations and learn why scientists study cosmic rays. You can view real-time data from the neutron monitors, and you can download past neutron monitor data.

	Acknowledgement.The Bartol Research Institute neutron monitor program is supported by the United States National Science Foundation under grant ATM-0527878. Construction of the stations in Fort Smith, Peawanuck, and Nain was supported by NSF's Major Research Infrastructure program under grant OPP-9724293.
Any opinions, findings and conclusions or recomendations expressed on this Website are those of the authors and do not necessarily reflect the views of the National Science Foundation (NSF).

Site Guide

• Stations.Some station names can be clicked for further information and, in some cases, photos.
• Listening for Cosmic Rays ! Nontechnical account of how neutron monitors work, why scientists study cosmic rays, and how cosmic rays affect our lives. Concentrates on the Inuvik (Canada) monitor, but the general concepts apply to all of our stations.
• Solar Modulation. Follow the solar modulation cycle ! This plot of sunspot number with McMurdo neutron rate is updated monthly.
• GLE List. A list of all recorded Ground Level Enhancments -- solar cosmic ray events intense enough to raise radiation levels on Earth's surface.
• Building Nain neutron monitor. Nontechnical account of the construction of our neutron monitor station in Nain.
• Download Data.
• Preprints and Reprints.
• Personnel / Points of Contact.
• Links to Other Neutron Monitor and Space Weather Sites.

STATIONS

The Bartol Research Institute currently operates 10 neutron monitors:

McMurdo, Antarctica South Pole, Antarctica Thule, Greenland Newark, Delaware Mobile Monitor USCGC Polar Sea USCGC Polar Star

Inuvik, North West Territories Fort Smith, North West Territories Peawanuck, Ontario Nain, Labrador Goose Bay, Labrador

The monitors in Fort Smith, Peawanuck, and Nain were recently constructed through a National Science Foundation Major Research Infrastructure grant, OPP-9724293. They began operating in Fall 2000.

PERSONNEL / POINTS OF CONTACT

	John W Bieber, Professor, Principal Investigator john@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-2240 FAX: 302-831-1843 Contact for: Science, Space Weather, Funding Issues, Web Site
	Paul Evenson, Professor, Co-Principal Investigator penguin@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-2988 FAX: 302-831-1843 Contact for: Science, Technical
	K Roger Pyle, Senior Scientist, Co-Principal Investigator pyle@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-8117 FAX: 302-831-1843 Contact for: Data Requests & Questions, Technical
	John Clem, Research Associate Professor, Co-Principal Investigator clem@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-4354 FAX: 302-831-1843 Contact for: Science, Technical, Radiation Transport
	Takao Kuwabara, Postdoctoral Associate takao@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-4355 FAX: 302-831-1843 Contact for: Science, Space Weather, Muon Detectors
	Len Shulman, Electronics Engineer shulman@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-1848 FAX: 302-831-1843 Contact for: Logistics, Technical
	James Roth, Electronics Technician roth@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-0846 FAX: 302-831-1843 Contact for: Logistics, Technical
	Chang-Hua Tsao, Research Scientist hua@bartol.udel.edu Bartol Research Institute 217 Sharp Lab University of Delaware Newark, DE 19716 U.S.A. Phone: 302-831-1521 FAX: 302-831-1843

Links to Other Cosmic Ray and Space Weather Sites

• University of Chicago neutron monitor datasets. This page has quite a bit of background information on neutron monitors. You can also download data.
• Apatity Neutron Monitor. Plots of 5-minute and 1-hour data. Frequent updating.
• Moscow Neutron Monitor. Realtime data and much useful information.
• NGDC Cosmic Ray page. Lots of background information. Links to data archives.
• Cosmic and Heliospheric Learning Center. Excellent non-technical resource.
• U Michigan Space Weather Site. Space weather and its effect on human activities. Superb site!
• Official SEC Space Weather forecast.