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Examination of the Flow of High Speed and Thermal Neutrons (BTN-M1)


Overview | Description | Applications | Operations | Results | Publications | Imagery

Experiment Overview

This content was provided by I. G. Mitrofanov, Ph.D., and is maintained in a database by the ISS Program Science Office.

Brief Summary

BTN-M1 (Neutron) will measure the exposure of ISS to neutron and gamma radiation that come from solar flares. This device will be used to clarify current on-orbit radiation models and determine the complete radiation dose the astronauts and cosmonauts receive during EVAs.

Principal Investigator(s)

  • I. G. Mitrofanov, Ph.D., Russia
  • Co-Investigator(s)/Collaborator(s)

    Information Pending

    Information Pending

    Sponsoring Space Agency

    Russian Federal Space Agency (Roscosmos)

    Sponsoring Organization

    Information Pending

    ISS Expedition Duration:

    September 2006 - September 2010

    Expeditions Assigned


    Previous ISS Missions

    Information Pending

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    Experiment Description

    Research Overview

    Information Pending


    Building a physical model for generation of charged and neutral particles during solar flares. Developing a physical model of neutron albedo of the earth atmosphere with regard to helio- and geophysical environment, measurement point longitude and altitude effects, time of the day and lighting conditions, atmosphere conditions. Developing a physical model of neutron background in the vicinity of the ISS in different flight conditions, as well as recording space gamma bursts.

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    Space Applications

    Information Pending

    Earth Applications

    Information Pending

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    Operational Requirements

    Information Pending

    Operational Protocols

    Electronics unit BTN-ME; Spare BTN; BTN unit.

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    Results/More Information

    Experimental spectrometric investigations of neutron fields on the ISS will: clarify the on-orbit radiation environment models; clarify neutron source models in near-earth space environment and evaluate their contribution in a complete radiation dose received by cosmonauts during EVA; obtain data on high-energy neutron fluxes with energies up to 16 MeV coming from powerful solar flares with regard to albedo radiation of the Earth. Build an operational model of neutron background environment on the station. Clarify existing solar activity models. Obtain data on fluxes of rigid electromagnetic space rays component.

    Measurement data on spatial and time distributions of radiation characteristics of space ionizing radiation (neutron and gamma components) outside the Service Module of the ISS RS; Correlation data on radiation environment parameters outside the Service Module of the ISS RS obtained through calculation with the results of measurements made by science hardware BTN-M1 and results of other Russian and international experiments. Measurement data on solar flare parameters in neutron and gamma range.

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    Related Websites
  • Energia - Science Research on the ISS Russian Segment
  • Coordinating Scientific and Technical Council of the Russian Space Agency [Russian]
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    image BTN units. Image courtesy FSA.
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    Information provided by the investigation team to the ISS Program Scientist's Office.
    If updates are needed to the summary please contact JSC-ISS-Program-Science-Group. For other general questions regarding space station research and technology, please feel free to call our help line at 281-244-6187 or e-mail at JSC-ISS-Payloads-Helpline.