Electric lamp and discharge devices: systems – High energy particle accelerator tube – Magnetic field acceleration means
Patent
1995-05-16
1997-12-16
Pascal, Robert
Electric lamp and discharge devices: systems
High energy particle accelerator tube
Magnetic field acceleration means
315 542, 315507, H05H 1304
Patent
active
056989547
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an accelerator, particularly to an accelerator which is automatically operated and which can preferably be used for industries or medical treatment. The present invention also relates to an operating method for such an accelerator.
BACKGROUND ART
As described in "Electronic `Liniac` Beam Monitor OHO'86, High Energy Accelerator Seminar; Beam Monitor and Beam Instability, p. 4-1 (1986)" as the prior art, the starting operation of a circular accelerator and change of operation parameters are manually performed by observing the outputs of monitors such as a profile monitor, position monitor, and current monitor in accordance with previously calculated parameters.
The prior art is described below by taking the electron storage ring in FIG. 2 as an example. Electron beams obtained from a front accelerator 10 are shaped, aligned, and energy-sorted by an electromagnet group called a beam transfer system 11 and then applied to an electron storage ring 12. Thereafter, the electron beams are held on a certain orbit (hereafter referred to as a closed orbit) by the electromagnet group of the storage ring 12. Moreover, the electron beams are accelerated or kept in a storage state by receiving energy from an accelerating cavity 22 in the storage ring. This series of operations are called beam adjustment and is manually performed in the prior art while observing the outputs of various monitors set in the beam transfer system 11. The storage ring 12 and the operation of such an accelerator depends on experts. In the case of the above prior art, the starting operation and change of operation parameters are not easy because the beam adjustment is manually performed. Moreover, because the beam adjustment is manually performed in the case of the prior art, there are problems that a true operation parameter cannot easily be determined because there are too many parameters (e.g. exciting current of an electromagnet) to be determined and the beam adjustment greatly depends on the skill of an operator.
As other prior art, an accelerator for previously storing an exciting current to be supplied to a corrective electromagnet (for correcting the orbit of an electron beam) when a charged particle beam is injected into or extracted from a synchrotron and supplying the exciting current to the corrective electromagnet at a predetermined timing is disclosed in the official gazette of Japanese Patent Laid-Open No. 169100/1992.
Moreover, a control method for detecting a beam current taken out of a synchrotron and controlling the exciting current of an electromagnet so that the beam current is maximized is disclosed in the official gazette of Japanese Patent Laid-Open No. 140999/1983.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an operating method of an accelerator, an accelerator, and an accelerating system for realizing automatic operation in all modes of the accelerator without depending on the skill of an operator.
The above object is achieved by using data for injection energy, storage energy, and accelerating time of a charged particle beam of an accelerator, thereby obtaining operating patterns of components of the accelerator, and controlling the components in accordance with the obtained operating patterns.
Moreover, the above object is achieved by using data for injection energy, storage energy, accelerating time, extraction energy, and extraction current of a charged particle beam of an accelerator, thereby obtaining operating patterns of components of the accelerator, and controlling the components in accordance with the obtained operating patterns.
Furthermore, the above object is achieved by using an operating method of an accelerator provided with a first component for bending a charged particle beam and a second component for correcting the orbit of the beam, in which beam transfer is controlled for each of the components from the upstream side toward the downstream side of the traveling direction of the beam and thereafter beam transfer
REFERENCES:
patent: 5107222 (1992-04-01), Tsuzuki
Hiramoto Kazuo
Hirota Junichi
Bettendorf Justin P.
Hitachi , Ltd.
Pascal Robert
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