Configurable linear accelerator

Patent metadata

Field	Value
Publication number	US-10693464-B2
Application number	US-201816147488-A
Country	US
Kind code	B2
Filing date	Sep 28, 2018
Priority date	May 18, 2018
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

Some embodiments include a system comprising: a particle power source configured to generate a particle power signal; a radio frequency (RF) power source configured to generate an RF power signal; a particle source configured to generate a particle beam in response to the particle power signal; a RF source configured to generate an RF signal in response to the RF power signal; and an accelerator structure configured to accelerate the particle beam in response to the RF signal; wherein a timing of the RF power signal is different from a timing of the particle power signal.

First claim

The invention claimed is:

1. A system, comprising:
a particle power source configured to generate a particle power signal including a particle power pulse having a particle power pulse timing;
a radio frequency (RF) power source configured to generate an RF power signal including an RF power pulse having an RF power pulse timing;
a particle source configured to generate a particle beam pulse in response to the particle power pulse;
a RF source configured to generate an RF signal pulse in response to the RF power pulse;
an accelerator structure configured to accelerate the particle beam pulse in response to the RF signal pulse; and
control logic coupled to the particle power source and the RF power source, wherein the control logic is configured to:
receive a pulse message;
activate the particle power source to generate the particle power pulse in response to the pulse message; and
activate the RF power source to generate the RF power pulse in response to the pulse message;

wherein the control logic is configured to activate the particle power source and the RF power source such that a difference between the particle power pulse timing and the RF power pulse timing is based on the pulse message.

2. The system of claim 1 , wherein the RF power source is configured to generate the RF power signal having a voltage independent of the particle power signal.

3. The system of claim 1 , wherein the RF power pulse timing is independent of the particle power pulse timing.

4. The system of claim 3 , wherein a pulse width of the RF power pulse is different from a pulse width of the particle power pulse.

5. The system of claim 3 , wherein a pulse delay of the RF power pulse is different from a pulse delay of the particle power pulse.

6. The system of claim 1 , wherein:
the particle power source comprises a first high-voltage source configured to generate a first high-voltage in response to a main power source and is configured to generate the particle power signal in response to the first high-voltage; and
the RF power source comprises a second high-voltage source configured to generate a second high-voltage in response to the main power source and is configured to generate the RF power signal in response to the second high-voltage.

7. The system of claim 1 , wherein the control logic is further configured to:
receive a trigger;
activate the particle power source to generate the particle power pulse in response to the pulse message and the trigger; and
activate the RF power source to generate the RF power pulse in response to the pulse message and the trigger.

8. The system of claim 1 , wherein:
the pulse message is one of a plurality of pulse messages; and
the control logic is configured to:
receive the plurality of pulse messages;
receive a plurality of triggers, each trigger associated with a corresponding one of the pulse messages; and
for each trigger:
activate the particle power source to generate a corresponding particle power pulse in response to the trigger and the corresponding pulse message; and
activate the RF power source to generate a corresponding RF power pulse in response to the trigger and the corresponding pulse message.

9. The system of claim 8 , wherein for a first trigger and a second trigger of the triggers:
the first trigger and the second trigger are consecutive; and
the pulse message corresponding to the first trigger includes an indication of a first amplitude of one of the corresponding particle power pulse and the corresponding RF power pulse;
the pulse message corresponding to the second trigger includes an indication of a second amplitude of the one of the corresponding particle power pulse and the corresponding RF power pulse; and
the first amplitude is different from the second amplitude.

10. The system of claim 8 , wherein for a first trigger and a second trigger of the triggers:
the first trigger and the second trigger are consecutive; and
the pulse message corresponding to the first trigger includes an indication of a first timing of a corresponding pulse of one of the particle power source and the RF power source;
the pulse message corresponding to the second trigger includes an indication of a second timing of a corresponding pulse of the one of the particle power source and the RF power source; and
the first timing is different from the second timing.

11. The system of claim 8 , wherein for a first trigger, a second trigger, and a third trigger of the triggers:
the first trigger, the second trigger and the third trigger are consecutive; and
the pulse message corresponding to the first trigger includes an indication of a first timing or amplitude of a corresponding pulse of one of the particle power source and the RF power source;
the pulse message corresponding to the second trigger includes an indication of a second timing or amplitude of a corresponding pulse of the one of the particle power source and the RF power source;
the pulse message corresponding to the third trigger includes an indication of a third timing or amplitude of a corresponding pulse of the one of the particle power source and the RF power source; and
the first timing or amplitude is different from the third timing or amplitude.

12. A system, comprising:
a particle power source configured to receive a first alternating current (AC) power and a first control signal and generate a particle power signal from the first AC power based on the first control signal;
a radio frequency (RF) power source configured to receive a second AC power and a second control signal and generate an RF power signal from the second AC power based on the second control signal;
a particle source configured to generate a particle beam in response to the particle power signal;
a RF source configured to generate an RF signal in response to the RF power signal;
an accelerator structure configured to accelerate the particle beam in response to the RF signal; and
control logic configured to generate the first control signal and the second control signal based on a pulse message;
wherein:
the first AC power is separate from the second AC power;
the particle power source is configured to generate the particle power signal including a particle power pulse having a particle power pulse timing;
the RF power source is configured to generate the RF power signal including an RF power pulse having an RF power pulse timing; and
for at least one set of the first control signal and the second control signal, a difference between the RF power pulse timing and the particle power pulse timing based on the pulse message.

13. The system of claim 12 , wherein for at least one set of the first control signal and the second control signal, an amplitude of the RF power signal is different from an amplitude of the particle power signal.

14. A method, comprising:
receiving a pulse message;
configuring a radio frequency (RF) power source to output an RF power signal having an RF power pulse based on the pulse message;
configuring a particle power source to output a particle power signal having a particle power pulse based on the pulse message wherein a difference between the RF power pulse and the particle power pulse is based on the pulse message;
driving a particle source with the particle power pulse;
driving an RF source with the RF power pulse; and
accelerating a particle beam generated in response to the particle power pulse from the particle source using an RF signal generated in response to the RF power pulse from the RF source.

15. The method of claim 14 , wherein a timing of the RF po

Assignees

• Varex Imaging Corp

Inventors

• Turner John C
• Miller Lawrence
• Hanson Nathan

Classifications

• H05H7/22

  Details of linear accelerators, e.g. drift tubes (H05H7/02 - H05H7/20 take precedence) · CPC title

• H05H7/02 Primary

  Circuits or systems for supplying or feeding radio-frequency energy · CPC title

• H05H2007/025

  Radiofrequency systems · CPC title

• H05H2007/022

  Pulsed systems · CPC title

• H05H9/048

  Lepton LINACS · CPC title