Dosimetry apparatus, systems, and methods

摘要

A direct ion storage (DIS) radiation detector or dosimeter has a design that is easy and low cost to manufacture using semiconductor processing techniques. The detectors include internal communications interfaces so they are easy to read. Different interfaces, including wired, e.g. USB ports, and wireless interfaces, may be used, so that the dosimeters may be read over the internet. The detectors can thus be deployed or used in a variety of detection systems and screening methods, including periodic or single time screening of people, objects, or containers at a location by means of affixed dosimeters; screening of objects, containers or people at a series of locations by means of affixed dosimeters, and surveillance of an area by monitoring moving dosimeters affixed to people or vehicles.

主权项

1. A direct ion storage (DIS) radiation dosimeter, comprising:
a first layer having a MOSFET structure formed thereon by semiconductor processing techniques, the MOSFET structure having a floating gate with an exposed surface; a second layer having a concavity therein; a third layer, optionally having a concavity therein; the first layer being sandwiched between the second and third layer, the three layers being bonded together to form a hermetic seal; wherein the concavity in the second layer, and any concavity in the third layer, are aligned with the exposed surface of the floating gate to form an ion chamber; wherein the first layer has more than one MOSFET structure formed thereon, the second layer has a corresponding number of concavities, and the third layer optionally has a corresponding number of concavities, to form an ion chamber over each MOSFET structure; and wherein each ion chamber is filled with: a different gas; or a gas having different pressure.