论文信息 - A Micromachined Electret-Based Transponder for In Situ Radiation Measurement

A Micromachined Electret-Based Transponder for In Situ Radiation Measurement

This letter reports on the development of a micromachined passive transponder for in situ measurement of ionizing radiation. gamma-ray exposure is remotely measured by monitoring the resonance frequency change correlated with a change in the surface charge of an electret. This is achieved through a micromachined capacitor with a movable plate that is partially filled with a Teflon electret and connected in parallel with an inductor, forming a passive LC tank (a microionization chamber, 1.5 cm in diameter and 3 mm in thickness). Test results show that an exposure of 60 000 R from Cs137 produces a 687-kHz resonance frequency shift (sensitivity of 11.45 kHz/kR)

B. Ziaie | B. Ziaie | C. Son | C. Son

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