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Passive Dosimeter for Lifescience Experiment in Space (PADLES)
07.17.09

Overview | Description | Applications | Operations | Results | Publications | Images

Experiment/Payload Overview

Brief Summary

Passive Dosimeter for Lifescience Experiment in Space (PADLES) measures radiation exposure levels onboard the International Space Station. PADLES uses passive and integrating dosimeters to detect radiation levels. These dosimeters are located near the biological experiment facilities and on the end of the Japanese Experiment Module, Kibo. The proposed research seeks to survey the radiation environment inside the KIBO by using Area dosimeter. Area dosimeter and the analysis system have been developed in JAXA as a system for space radiation dosimetry. The dosimeters measure absorbed doses, equivalent doses and liner energy transfer (LET) distributions.

Principal Investigator

  • Aiko Nagamatsu, Ph.D., Japan Aerospace Exploration Agency, Tsukuba, Japan

    • Co-Investigator(s)/Collaborator(s)

  • Keiji Murakami, Japan Aerospace Exploration Agency, Tsukuba, Japan

    • Payload Developer

    Japan Aerospace Exploration Agency, Tsukuba, Japan

    Sponsoring Agency

    Japan Aerospace Exploration Agency (JAXA)

    Expeditions Assigned

    |17|18|19|20|21|22|

    Previous ISS Missions

    This is the series experiments in succession from Increment 17.

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    Experiment/Payload Description

    Research Summary

    • The proposed research seeks to survey the radiation environment on board the KIBO by using Area and Exp dosimeters.


    • From Inc 19, we will also start area monitoring inside ELM-PS. Area dosimeters(17) will be swapped out every 6 increments, which will be installed in fixed locations on JPM and ELM-PS. They will be retrieve in the next increment.


    • Exp dosimeter(1) will be installed in the ELM-PS to investigate the correlation between monitoring direction and dependence on the incident angle of space radiation particles.


    • The dosimeters measure absorbed doses, equivalent doses and liner energy transfer (LET) distributions. Data reading can be done only on the ground after return.

    Description

    Passive dosimeter packages and an analysis system are developed by JAXA for supporting life science experiments. They provide environmental data for space radiation. In the ISS, we are planning to measure space radiation by a combination of Nuclear track detectors and Thermoluminescent Dosimetry (TLD). TLD are used for estimating an absorbed dose for space radiation in the LET region below 10 keV/?m. CR-39 plastic plates are used for measuring LET distributions of heavy-charged particles in the LET region above 10 keV/?m. We estimate the absorbed dose and dose equivalent above 10 keV/?m from the LET distributions.

    PADLES-Area is a compact and battery-less Dosoimeter , it has the advantage of no necessity of crew times and package for setting extremely close to biological samples. (The basic PADLES external form: 2.5 cm x 2.5 cm x 0.4cm) The dosimeters will be adjacent to biological samples on board at all times. It is available to use at storage temperatures from -80 deg. C to +37deg. C.

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    Applications

    Space Applications

    Information Pending

    Earth Applications

    Dose results obtained from all dosimeters will be opened to JAXA?s free access web site. Continuous monitoring throughout the JEM program is useful to support risk assessment for astronauts, dose management and updates of radiation calculation models. The results of Exp dosimeter contributes to study semiconductor and device damage in space radiation fields and accumulate the results for future device development.

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    Operations

    Operational Requirements

    Information Pending

    Operational Protocols

    Information Pending

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    Results/More Information

    Information Pending

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    Related Web Sites
  • The information on this web page was duplicated from the JAXA Experiment Database. The "Brief Research Summary (PAO)" and "Research Summary" are provided by the Office of the ISS Program Scientist.

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    Publications

    Results Publications

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      Related Publications

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        Images

        imageNASA Image: ISS017E009445 - View of the PADLES area dosimeter in the JAXA Experiment Modulem, Kibo.
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        Information Provided and Updated by the ISS Program Scientist's Office
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