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US 9,552,955 B2Granted
Electron source
AssigneesSiemens Healthcare GmbH, NuRay Technology Co., Ltd.
InventorsMoritz Beckmann, Walter Beyerlein, Andreas Böhme, Yuan Cheng, Jens Fürst, Markus Hemmerlein, Houman Jafari, Jürgen Oelschlegel, Qi Qiu, Frank Sprenger
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Abstract
An electron source includes a plurality of electron emission cathodes and at least one control electrode. A gate current regulator is provided for regulation of current flowing through the at least one control electrode.
Claims15
A system for regulating an electron source, the system comprising:
- a plurality of electron emission cathodes operable to release a current;
- at least one control electrode;
- a gate current regulator configured for regulation of a gate current flowing through the at least one control electrode via a voltage difference between the at least one control electrode and an electron emission cathode of the plurality of electron emission cathodes;
- and
- a gate current measuring unit in a control loop including the gate current regulator, the gate current measuring unit operable to measure the gate current, the gate current being a portion of the current released by the plurality of electron emission cathodes,
- wherein an electron current of at least one electron emission cathode of the plurality of electron emission cathodes is proportional to the gate current.
3 more elements
A method for the operation of an electron source, the method comprising:
- emitting electrons with a plurality of electron emission cathodes, wherein a voltage is applied between the plurality of electron emission cathodes and a control electrode;
- regulating, with a gate current regulator, gate current flowing through the control electrode via the voltage applied between an electron emission cathode of the plurality of electron emission cathodes and the control electrode;
- and
- measuring the gate current with a gate current measuring unit in a control loop including the gate current regulator, the gate current comprising a portion of the electrons emitted by the plurality of electron emission cathodes,
- wherein an electron current of at least one electron emission cathode of the plurality of electron emission cathodes is proportional to the gate current.
2 more elements
Dependencies are inferred from the claim text.