Dose rate monitor, system and method
AssigneeVarian Medical Systems, Inc.
InventorsReza Alibazi Behbahani, Flavio Poehlmann-Martins
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Abstract
A radiation dose rate monitor system includes an emitting electrode configured to be impinged by radiation radiation; a collecting electrode configured to form an electrical circuit with said emitting electrode, a current measurement device configured to measure a current through said emitting and collecting electrodes indicative of a dose of said radiation radiation, and a chamber enclosing a gas. Emission of secondary electrons from the emitting electrode provides a majority of the current.
Claims20
A radiation dose rate monitor system comprising:
- a collecting electrode configured to be impinged by radiation;
- an emitting electrode configured to form an electrical circuit with said collecting electrode;
- and
- a current measurement device configured to measure a current through said emitting electrode and said collecting electrode, the current being indicative of a dose of said radiation,
- wherein emission of secondary electrons from said emitting electrode provides a majority of said current.
A method of measuring a radiation dose rate, the method comprising:
- applying a voltage across a complementary pair of electrodes, wherein at least one of said electrodes is exposed to a radiation beam;
- collecting, at the electrodes, secondary electrons emitted from the electrodes in response to the radiation beam;
- and
- measuring a current due to emission of the secondary electron to indicate the radiation dose rate.
A method of monitoring a radiation dose rate, the method comprising:
- applying a voltage across a complementary pair of electrodes, wherein
- at least one of said electrodes is exposed to a radiation beam;
- and
- measuring current corresponding to a radiation dose rate in a first mode or in a second mode,
- wherein, in said first mode, more than 80 percent of said current is due to collection of secondary electrons, and
- wherein, in said second mode, more than 80 percent of said current is due to collection of electron/ion pairs at electrodes due to ionization of a gas between said pair of electrodes.
Dependencies are inferred from the claim text.