The use of TEPC for reference dosimetry

Area of Science:

• Radiation physics
• Aviation safety
• Dosimetry

Background:

• Aircraft radiation fields are complex and energy-diverse, posing challenges for conventional dosimetry.
• Existing dosemeters often measure only one radiation quality, complicating accurate assessment of mixed fields.
• Lack of established radiation standards for aviation environments necessitates reliable measurement procedures.

Purpose of the Study:

• To identify a standard measurement procedure for onboard aircraft radiation fields.
• To evaluate the suitability of tissue-equivalent proportional counters (TEPCs) as reference instruments.
• To establish a basis for simpler measurements and route dose calculations.

Main Methods:

• Utilized tissue-equivalent proportional counters (TEPCs), a direct-reading dosemeter measuring absorbed dose and lineal energy.
• Explained the measurement principles of TEPC detectors, which feature tissue-like walls and gas cavities.
• Collected and analyzed preliminary data from multiple research groups performing onboard aircraft measurements.

Main Results:

• TEPC instruments demonstrated the capacity to measure both absorbed dose to tissue and radiation quality.
• Observed results from different research groups using TEPCs showed agreement within +/- 20%.
• The data supports the potential of TEPCs as a standardized measurement tool for aviation radiation.

Conclusions:

• Tissue-equivalent proportional counters (TEPCs) are suitable for serving as reference instruments in complex aviation radiation fields.
• TEPCs offer a reliable method for characterizing radiation quality and absorbed dose, addressing current measurement challenges.
• The findings pave the way for developing standardized radiation protection protocols for aircrew and passengers.