Particle Flux Demonstrator (Particle Flux) - 11.22.16

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

ISS Science for Everyone

Science Objectives for Everyone
The Particle Flux Demonstrator (Particle Flux) is a handheld, battery operated cosmic ray (charged particle) detector.
Science Results for Everyone
Information Pending

The following content was provided by Mark Pearce, and is maintained in a database by the ISS Program Science Office.
Experiment Details


Principal Investigator(s)
Mark Pearce, Royal Institute of Technology, Stockholm, Sweden

Oscar Larsson, M.S., Royal Institute of Technology, Stockholm, Sweden
Donald Roy Pettit, Ph.D., Johnson Space Center, Houston, TX, United States
Léopold Eyharts, European Space Agency (ESA), Cologne, Germany
Donald Roy Pettit, Ph.D., Johnson Space Center, Houston, TX, United States
Christer Fuglesang, Ph.D., European Astronaut Centre, Köln, Germany

Royal Institute of Technology, Stockholm, Sweden

Sponsoring Space Agency
National Aeronautics and Space Administration (NASA)

Sponsoring Organization
NASA Education (EDU)

Research Benefits
Information Pending

ISS Expedition Duration
October 2007 - April 2008; October 2008 - October 2009; September 2011 - May 2012

Expeditions Assigned

Previous Missions
Information Pending

^ back to top

Experiment Description

Research Overview

  • The Particle Flux Demonstrator (Particle Flux) measures the flow of charged particles (cosmic rays) passing through the International Space Station (ISS). This varies to the greatest degree with the change in the latitude at which the station is flying.

  • On the ISS, the majority of detected particles are protons, but it is possible to select much rarer charged ions as well. The instrument is portable, and it is expected to show the flux variations in different parts of the ISS, depending on the amount of local shielding material there is. The change in flux is also observed with the orbital positions, higher flux at high latitudes and lowers near the equator. In particular the manifold increase when ISS passes through the South Atlantic Anomaly is standing out Particle Flux also shows how these outside variations influence the flux inside.

  • Particle Flux forms part of an educational experiment at high school and university levels. Several education institutions, in Sweden, Norway and Denmark, are taking part in this experiment using cosmic rays detectors to take readings on Earth during the ISS flyovers.

The Particle Flux Demonstrator (Particle Flux) is designed for use onboard the International Space Station (ISS). The device is constructed for educational purposes and demonstrates the basic properties of the ionizing radiation environment aboard the ISS. Activities are filmed and included in a media package for high school and university students in Sweden, Norway and Denmark.

The Particle Flux consists of a vented aluminum cylinder of 9 cm x 20 cm and is designed to be held in the hand. The Particle Flux is supplied with a removable (screw thread) cap which protects the display panel when the Particle Flux is not in use. During operations, the cap is removed and stowed on the opposite end of the Particle Flux using a velcro strip.

^ back to top


Space Applications
Information Pending

Earth Applications
Information Pending

^ back to top


Operational Requirements and Protocols
Particle Flux is designed to operate autonomously throughout most of the operations during experiment performance.

^ back to top

Decadal Survey Recommendations

Information Pending

^ back to top

Results/More Information

Information Pending

^ back to top

Related Websites
The information on this page is provided courtesy of the ESA Erasmus Experiment Archive.

^ back to top


image Particle Flux, ready for operations. Image courtesy of ESA.
+ View Larger Image