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Reduced-gravity Environment Hardware Demonstrations of a Prototype Miniaturized Flow Cytometer and Companion Microfluidic Mixing Technology

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Published on: November 13, 2014

Compact Tissue-equivalent Proportional Counter for Deep Space Human Missions.

T Straume¹, L A Braby, T B Borak

¹*NASA Ames Research Center, Moffett Field, CA 94035; †Texas A&M University, College Station, TX 77843; ‡Colorado State University, Ft. Collins, CO 80523.

|August 28, 2015

Summary

This summary is machine-generated.

A new compact tissue-equivalent proportional counter (TEPC) prototype enables real-time measurement of space radiation biological effectiveness. This advancement is crucial for monitoring astronaut health during deep-space missions.

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Area of Science:

Space science
Radiation biology
Instrumentation

Background:

Deep space radiation poses significant health risks to astronauts.
Current methods for measuring radiation biological effectiveness are limited in space applications.
Existing tissue-equivalent proportional counters (TEPCs) are too large and power-intensive for deep-space missions.

Purpose of the Study:

To develop a compact TEPC prototype for deep-space applications.
To enable real-time measurement of radiation quantities related to biological effectiveness.
To detect both galactic cosmic rays and solar particle events.

Main Methods:

Designed a compact TEPC prototype suitable for deep-space exploration.
Employed a novel approach using sequential sampling intervals to simulate dual detectors.
Utilized a single detector for real-time determination of dose equivalent (yD) and quality factor.

Main Results:

The prototype demonstrated linear response to gamma rays across a wide dose-rate range with <5% accuracy.
Measurements of yD for carbon ions (200 MeV n-1) achieved better than 10% accuracy.
Absorbed dose-rate accuracy for fission spectrum neutrons was better than 15%.

Conclusions:

The compact TEPC prototype is a viable instrument for measuring space radiation biological effectiveness.
This technology can support astronaut health monitoring on future deep-space missions.
The device offers real-time dose and quality factor determination, crucial for radiation protection.