Wide dynamic range bidirectional integrating electrometer with low leakage solid-state reset and range change operating over an extended temperature range
AssigneeGeneral Electric Company
InventorFred Yu-Feng Chou
Life of this patent
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Abstract
A radiation monitor includes an ionization chamber for detecting radiation that passes into the ionization chamber. The ionization chamber generates a current flow in response to the detected radiation. An electrometer is electrically connected to the ionization chamber for measuring the current flow generated by the ionization chamber. The electrometer is operable in a plurality of modes based on a magnitude of the current flow generated by the ionization chamber. A method of measuring current flow through an electrometer of a radiation monitor is also provided.
Claims20
A radiation monitor including:
- an ionization chamber for detecting radiation that passes into the ionization chamber, the ionization chamber generating a current flow in response to the detected radiation;
- and
- an electrometer electrically connected to the ionization chamber for measuring the current flow generated by the ionization chamber, wherein the electrometer is configured to be operable in a plurality of modes based on a magnitude of the current flow generated by the ionization chamber.
A radiation monitor including:
- an ionization chamber for detecting radiation that passes into the ionization chamber, the ionization chamber generating a current flow in response to the detected radiation;
- and
- an electrometer electrically connected to the ionization chamber for measuring the current flow of the ionization chamber, the electrometer being configured to be operable in a first mode in response to a measured current within a first range and a second mode in response to a measured current within a second range that is larger than the first range, wherein current leakage in the first mode and second mode is minimized.
A method of measuring current flow through an electrometer of a radiation monitor including:
- providing an ionization chamber for detecting radiation, the ionization chamber generating a current flow in response to detected radiation;
- providing the electrometer electrically connected to the ionization chamber for measuring the current flow of the ionization chamber;
- operating the electrometer in a first mode in response to the measured current being within a first range;
- and
- operating the electrometer in a second mode in response to the measured current being within a second range.
Dependencies are inferred from the claim text.