System with acceleration tube conditioning apparatus and acceleration tube conditioning method

• US 20080191645A1
• Filed: 09/28/2007
• Published: 08/14/2008
• Est. Priority Date: 02/08/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Yamashita, Ichiro, Aoi, Tatsufumi, Urano, Susumu, Nomura, Shinji, Kajinishi, Kuniyuki
• Granted Patent: US 7,683,556 B2
• Time in Patent Office: Days
• US Class Current: 315/505
• CPC Class Codes: H05H 7/00 Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
• CPC Class Codes: H05H 9/02 Travelling-wave linear accelerators travelling-wave tubes H01J25/34

Abstract

In an acceleration tube conditioning apparatus for performing a conditioning process on an acceleration tube when a high frequency power signal to be supplied to an acceleration tube is generated by a high frequency power supply, a power value collecting section collects a traveling wave power value and a reflection wave power value from a sensor which monitors the traveling wave power signal and the reflection wave power signal. A high frequency calculating section calculates a resonance frequency of the acceleration tube based on the traveling wave power value and the reflection wave power value. A high frequency adjusting section determines a high frequency value based on one of the traveling wave power value and the reflection wave power value as a selection power value, and a high frequency power supply control unit controls the high frequency power supply based on the high frequency value. The high frequency value indicates a constant value when the selection power value is smaller than a predetermined value, and indicates the calculated resonance frequency when the selection power value is larger than the predetermined value.

Claims

1. An acceleration tube conditioning apparatus for performing a conditioning process on an acceleration tube when a high frequency power signal to be supplied to an acceleration tube is generated by a high frequency power supply, wherein said high frequency power signal is supplied to said acceleration tube as a traveling wave power signal and said traveling wave power signal is reflected in said acceleration tube as a reflection wave power signal, said acceleration tube conditioning apparatus comprising:

a power value collecting section configured to collect a traveling wave power value and a reflection wave power value from a sensor which monitors said traveling wave power signal and said reflection wave power signal;

a high frequency calculating section configured to calculate a resonance frequency of said acceleration tube based on said traveling wave power value and said reflection wave power value;

a high frequency adjusting section configured to determine a high frequency value based on one of said traveling wave power value and said reflection wave power value as a selection power value; and

a high frequency power supply control unit configured to control said high frequency power supply based on said high frequency value,

wherein said high frequency value indicates a constant value when said selection power value is smaller than a predetermined value, and indicates the calculated resonance frequency when said selection power value is larger than the predetermined value.

2. The acceleration tube conditioning apparatus according to claim 1, further comprising:

a vacuum degree collecting section configured to collect a vacuum degree in said acceleration tube, and

wherein said high frequency power supply control unit controls said high frequency power supply to change said high frequency power signal when said vacuum degree degrades from a predetermined vacuum degree.

3. The acceleration tube conditioning apparatus according to claim 2, wherein said high frequency power supply control unit controls said high frequency power supply to change an RF power of said high frequency power signal, then to change a DC voltage used when said high frequency power signal is generated, and then to change a repetition frequency when said high frequency power signal is generated intermittently and periodically, or a pulse width of said high frequency power signal.

4. The acceleration tube conditioning apparatus according to claim 1, further comprising:

a vacuum degree collecting section configured to collect a vacuum degree in said acceleration tube, and

wherein said high frequency power supply control unit controls said high frequency power supply to stop supply of said high frequency power signal to said acceleration tube when said vacuum degree degrades from a predetermined vacuum degree.

5. An acceleration tube conditioning apparatus for performing a conditioning process on an acceleration tube when a high frequency power signal to be supplied to an acceleration tube is generated by a high frequency power supply, wherein said high frequency power signal is supplied to said acceleration tube as a traveling wave power signal and said traveling wave power signal is reflected in said acceleration tube as a reflection wave power signal, said acceleration tube conditioning apparatus comprising:

a power value collecting section configured to collect a traveling wave power value and a reflection wave power value from a sensor which monitors said traveling wave power signal and said reflection wave power signal;

a high frequency calculating section configured to determine a resonance frequency of said acceleration tube based on said traveling wave power value and said reflection wave power value;

a high frequency adjusting section configured to generate a high frequency value based on a repetition frequency when said high frequency power supply generates said high frequency power signal intermittently and periodically; and

a high frequency power supply control unit configured to control said high frequency power supply based on said high frequency value,

wherein said high frequency value indicates a constant value when said repetition frequency is smaller than a predetermined value, and indicates said resonance frequency of said acceleration tube when said repetition frequency is larger than the predetermined value.

6. The acceleration tube conditioning apparatus according to claim 5, further comprising:

a vacuum degree collecting section configured to collect a vacuum degree in said acceleration tube, and

wherein said high frequency power supply control unit controls said high frequency power supply to change said high frequency power signal when said vacuum degree degrades from a predetermined vacuum degree.

7. The acceleration tube conditioning apparatus according to claim 5, further comprising:

a vacuum degree collecting section configured to collect a vacuum degree in said acceleration tube, and

wherein said high frequency power supply control unit controls said high frequency power supply to stop supply of said high frequency power signal to said acceleration tube when said vacuum degree degrades from a predetermined vacuum degree.

8. An acceleration tube conditioning system comprising:

an acceleration tube;

a high frequency power supply configured to generate a high frequency power signal;

a sensor configured to measure a traveling wave power value or reflection wave power value of said high frequency power signal in said acceleration tube; and

an acceleration tube conditioning apparatus configured to control said high frequency power supply,

wherein said acceleration tube conditioning apparatus comprises;

a power value collecting section configured to collect said traveling wave power value and said reflection wave power value from said sensor;

a high frequency calculating section configured to calculate a resonance frequency of said acceleration tube based on said traveling wave power value and said reflection wave power value; and

a high frequency adjusting section configured to determine a high frequency value; and

a high frequency power supply control unit configured to control said high frequency power supply based on said high frequency value.

9. The acceleration tube conditioning system according to claim 8, wherein said high frequency adjusting section determines said high frequency value based on one of said traveling wave power value and said reflection wave power value as a selection power value;

and

wherein said high frequency value indicates a constant value when said selection power value is smaller than a predetermined value, and indicates the calculated resonance frequency when said selection power value is larger than the predetermined value.

10. The acceleration tube conditioning system according to claim 8, wherein said high frequency adjusting section generates said high frequency value based on a repetition frequency when said high frequency power supply generates said high frequency power signal intermittently and periodically, and

wherein said high frequency value indicates a constant value when said repetition frequency is smaller than a predetermined value, and indicates said resonance frequency of said acceleration tube when said repetition frequency is larger than the predetermined value.

11. An acceleration tube conditioning method of performing a conditioning process on an acceleration tube when a high frequency power signal to be supplied to an acceleration tube is generated by a high frequency power supply, wherein said high frequency power signal is supplied to said acceleration tube as a traveling wave power signal and said traveling wave power signal is reflected in said acceleration tube as a reflection wave power signal, said acceleration tube conditioning method comprising:

collecting a traveling wave power value and a reflection wave power value from a sensor which monitors said traveling wave power signal and said reflection wave power signal;

calculating a resonance frequency of said acceleration tube based on said traveling wave power value and said reflection wave power value;

determining a high frequency value based on one of said traveling wave power value and said reflection wave power value as a selection power value; and

controlling said high frequency power supply based on said high frequency value,

wherein said high frequency value indicates a constant value when said selection power value is smaller than a predetermined value, and indicates the calculated resonance frequency when said selection power value is larger than the predetermined value.

12. The acceleration tube conditioning method according to claim 11, further comprising:

collecting a vacuum degree in said acceleration tube, and

wherein said controlling comprises;

controlling said high frequency power supply to change said high frequency power signal when said vacuum degree degrades from a predetermined vacuum degree.

13. The acceleration tube conditioning method according to claim 12, wherein said controlling comprises:

controlling said high frequency power supply to change an RF power of said high frequency power signal, then to change a DC voltage used when said high frequency power signal is generated, and then to change a repetition frequency when said high frequency power signal is generated intermittently and periodically, or a pulse width of said high frequency power signal.

14. The acceleration tube conditioning method according to claim 11, further comprising:

collecting a vacuum degree in said acceleration tube, and

wherein said controlling comprises;

controlling said high frequency power supply to stop supply of said high frequency power signal to said acceleration tube when said vacuum degree degrades from a predetermined vacuum degree.

15. An acceleration tube conditioning method of performing a conditioning process on an acceleration tube when a high frequency power signal to be supplied to an acceleration tube is generated by a high frequency power supply, wherein said high frequency power signal is supplied to said acceleration tube as a traveling wave power signal and said traveling wave power signal is reflected in said acceleration tube as a reflection wave power signal, said acceleration tube conditioning method comprising:

collecting a traveling wave power value and a reflection wave power value from a sensor which monitors said traveling wave power signal and said reflection wave power signal;

determining a resonance frequency of said acceleration tube based on said traveling wave power value and said reflection wave power value;

determining a high frequency value based on a repetition frequency when said high frequency power supply generates said high frequency power signal intermittently and periodically; and

controlling said high frequency power supply based on said high frequency value,

wherein said high frequency value indicates a constant value when said repetition frequency is smaller than a predetermined value, and indicates said resonance frequency of said acceleration tube when said repetition frequency is larger than the predetermined value.

16. The acceleration tube conditioning method according to claim 15, further comprising:

collecting a vacuum degree in said acceleration tube, and

wherein said controlling comprises;

controlling said high frequency power supply to change said high frequency power signal when said vacuum degree degrades from a predetermined vacuum degree.

17. The acceleration tube conditioning method according to claim 15, further comprising:

collecting a vacuum degree in said acceleration tube, and

wherein said controlling comprises;

controlling said high frequency power supply to stop supply of said high frequency power signal to said acceleration tube when said vacuum degree degrades from a predetermined vacuum degree.