Continuous wave electron-beam accelerator and continuous wave electron-beam accelerating method thereof
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorHirofumi Tanaka
Life of this patent
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Abstract
A continuous wave electron-beam accelerator that accelerates a continuous wave electron beam having a large average current includes an electron beam generator, an electron-beam accelerating unit using a radio-frequency electric field having a frequency of approximately 500 MHz to accelerate an continuous wave electron beam, and electron-beam bending units located across the electron-beam accelerating unit and that bend the continuous wave electron beam a number of times. Each electron-beam bending unit includes divided magnets having identical-polarity magnetic fields, and controls the continuous wave electron beam so that the beam passes through the electron-beam acceleration unit a number of times on almost the same path.
Claims9
A continuous wave electron-beam accelerator comprising:
- electron-beam generating means for generating a continuous wave electron beam;
- electron-beam accelerating means for accelerating the continuous wave electron beam;
- first electron-beam bending means located close to a first end of said electron-beam accelerating means, said first electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means;
- and
- second electron-beam bending means located close to a second end of said electron-beam accelerating means, said second electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means, wherein:
- each of said first electron-beam bending means and said second electron-beam bending means comprises a first bending electromagnet having a first surface opposed to a respective end of said electron-beam accelerating means, a second bending electromagnet and a third bending electromagnet which are discretely provided and are opposed to a second surface of said first bending electromagnet;
- said first bending electromagnet is a reverse bending electromagnet having a polarity opposite that of said second and third bending electromagnets;
- said second bending electromagnet has a polarity identical to that of said third bending electromagnet, and has a first magnetic field strength different from that of said third bending electromagnet;
- and
- said third bending electromagnet has a second magnetic field strength different from that of said second bending electromagnet.
A continuous wave electron-beam accelerator comprising:
- electron-beam generating means for generating a continuous wave electron beam;
- electron-beam accelerating means for accelerating the continuous wave electron beam;
- and
- electron-beam bending means for bending the accelerated continuous wave electron beam, said electron-beam bending means comprising:
- first electron-beam bending means located close to a first end of said electron-beam accelerating means, said first electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means;
- second electron-beam bending means located close to a second end of said electron-beam accelerating means, said second electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means, and
- third electron-beam bending means located between said first electron-beam bending means and said second electron-beam bending means opposed to said electron-beam accelerating means, said third electron-beam bending means generating dipole magnetic fields for adjusting a circumferential path of the continuous wave electron beam when the continuous wave electron beam passes through the magnetic fields.
A continuous wave electron-beam accelerating method for a continuous wave electron-beam accelerator including electron-beam generating means for generating a continuous wave electron beam, electron-beam accelerating means for accelerating the continuous wave electron beam, first electron-beam bending means located close to a first end of said electron-beam accelerating means, said first electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means, and second electron-beam bending means located close to a second end of said electron-beam accelerating means, said second electron-beam bending means bending the continuous wave electron beam, the continuous wave electron-beam accelerating method comprising:
- (a) adjusting an acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting a difference between the phase of the continuous wave electron beam in said electron-beam generating means and the phase of an acceleration electric field in said electron-beam accelerating means;
- (b) adjusting the acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting distance between said electron-beam accelerating means and said first electron-beam bending means;
- (c) adjusting the acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting distance between said first electron-beam bending means and said second electron-beam bending means;
- and
- (d) adjusting the acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting a ratio between magnetic field strengths of identical-polarity bending electromagnets provided in said first electron-beam bending means and said second electron-beam bending means and bending angles thereof.
A continuous wave electron-beam accelerating method for a continuous wave electron-beam accelerator including electron-beam generating means for generating a continuous wave electron beam, electron-beam accelerating means for accelerating the continuous wave electron beam, first electron-beam bending means located close to a first end of said electron-beam accelerating means, said first electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means, second electron-beam bending means located close to a second end of said electron-beam accelerating means, said second electron-beam bending means bending the continuous wave electron beam accelerated by said electron-beam accelerating means, and third electron-beam bending means located between said first electron-beam bending means and said second electron-beam bending means opposed to said electron-beam accelerating means, said third electron-beam bending means generating dipole magnetic fields for adjusting a circumferential path of the continuous wave electron beam when the continuous wave electron beam passes through the magnetic fields, the continuous wave electron-beam accelerating method comprising:
- (a) adjusting an acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting a difference between the phase of the continuous wave electron beam in said electron-beam generating means and the phase of an acceleration electric field in said electron-beam accelerating means;
- (b) adjusting the acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting distance between said electron-beam accelerating means and said first electron-beam bending means;
- (c) adjusting the acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by adjusting distance between said first electron-beam bending means and said second electron-beam bending means;
- and
- (d) adjusting the acceleration phase of the continuous wave electron beam which is injected into said electron-beam accelerating means by changing the magnetic field strengths of said third electron-beam bending means so as to adjust the length of the path of the continuous wave electron beam each time the continuous wave electron-beam passes through the accelerator.
Dependencies are inferred from the claim text.