MATCHING A RESONANT FREQUENCY OF A RESONANT CAVITY TO A FREQUENCY OF AN INPUT VOLTAGE
First Claim
Patent Images
1. A synchrocyclotron comprising:
- magnetic yokes that define a resonant cavity;
a source to provide input voltage to the resonant cavity; and
feedback circuitry to control the source so that a frequency of the input voltage substantially matches a resonant frequency of the resonant cavity.
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Abstract
A synchrocyclotron includes magnetic structures that define a resonant cavity, a source to provide particles to the resonant cavity, a voltage source to provide radio frequency (RF) voltage to the resonant cavity, a phase detector to detect a difference in phase between the RF voltage and a resonant frequency of the resonant cavity that changes over time, and a control circuit, responsive to the difference in phase, to control the voltage source so that a frequency of the RF voltage substantially matches the resonant frequency of the resonant cavity.
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Citations
25 Claims
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1. A synchrocyclotron comprising:
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magnetic yokes that define a resonant cavity; a source to provide input voltage to the resonant cavity; and feedback circuitry to control the source so that a frequency of the input voltage substantially matches a resonant frequency of the resonant cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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magnetic structures that define a resonant cavity; a source to provide particles to the resonant cavity; a voltage source to provide radio frequency (RF) voltage to the resonant cavity; a phase detector to detect a difference in phase between the RF voltage and a resonant frequency of the resonant cavity that changes over time; and a control circuit, responsive to the difference in phase, to control the voltage source so that a frequency of the RF voltage substantially matches the resonant frequency of the resonant cavity. - View Dependent Claims (12, 13, 14)
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15. Circuitry to substantially match a resonant frequency of a resonant cavity to a frequency of an input voltage to the resonant cavity, where the resonant frequency changes over time, the circuitry comprising:
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a phase detector to detect a difference in phase between the resonant frequency and the input voltage, the phase detector outputting a first signal that corresponds to the difference; an integrator and filter circuit to generate a control signal in response to the first signal; and a voltage controlled oscillator to regulate the input voltage in response to the control signal. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method of matching a resonant frequency of a resonant cavity to a frequency of an input voltage to the resonant cavity, where the resonant frequency changes over time, the method comprising:
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detecting a difference in phase between the resonant frequency and the input voltage, a first signal corresponding to the difference; generating a control signal in response to the first signal; and regulating the input voltage in response to the control signal. - View Dependent Claims (22, 23, 24, 25)
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Specification