Bending magnet
First Claim
1. A bending magnet comprising:
- a core which is substantially sectoral or semi-circular in horizontal sectional configuration and in which opposed magnetic poles are formed and a gap is formed between said opposed magnetic poles for disposing a vacuum chamber for storage of a charged particle beam; and
a pair of upper and lower exciting coils for generating a bending magnetic field in the gap, said pair of exciting coils having a vertical sectional configuration, as viewed along a plane vertical to an orbit of the charged particle beam, which is unchanged over a whole length of the bending magnet in a direction of said orbit and asymmetrical with respect to a line vertically intersecting with a line of said orbit, a vertical distance between said upper and lower exciting coils measured at an outer circumference side of said orbit in said vertical sectional configuration being larger than that measured at an inner circumference side of said orbit, so as to make uniform the distribution of the magnetic flux over the whole length of the bending magnet.
1 Assignment
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Accused Products
Abstract
In a bending magnet, a core which is substantially sectoral or semi-circular in horizontally sectional configuration and in which opposed magnetic poles are formed and a vacuum chamber for storage of a charged particle beam is disposed in a gap between the opposed magnetic poles, and a pair of upper and lower exciting coils for generating a bending magnetic field in the gap between the magnetic poles of core, the reluctance against the magnetic flux passing through a portion of the core adjacent to the inner circumference of the orbit of the charged particle beam and a portion of the core adjacent to the outer circumference of the charged particle beam orbit is equally uniformed over the overall length of the orbit of the charged particle beam. With this construction, the magnetic flux density becomes uniform in the gap between magnetic poles where the magnetic flux passing through the inner and outer circumference side portions is concentrated and the magnetic flux distribution is uniformed in the orbital direction in the gap, thereby eliminating adverse influence upon the charged particle beam, and the bending magnet can be very effective for use in a synchrotron or a storage ring.
130 Citations
10 Claims
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1. A bending magnet comprising:
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a core which is substantially sectoral or semi-circular in horizontal sectional configuration and in which opposed magnetic poles are formed and a gap is formed between said opposed magnetic poles for disposing a vacuum chamber for storage of a charged particle beam; and a pair of upper and lower exciting coils for generating a bending magnetic field in the gap, said pair of exciting coils having a vertical sectional configuration, as viewed along a plane vertical to an orbit of the charged particle beam, which is unchanged over a whole length of the bending magnet in a direction of said orbit and asymmetrical with respect to a line vertically intersecting with a line of said orbit, a vertical distance between said upper and lower exciting coils measured at an outer circumference side of said orbit in said vertical sectional configuration being larger than that measured at an inner circumference side of said orbit, so as to make uniform the distribution of the magnetic flux over the whole length of the bending magnet. - View Dependent Claims (2, 3, 4, 5)
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6. A storage ring comprising a plurality of bending magnets, each bending magnet comprising:
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a core which is substantially sectoral or semi-circular in horizontal sectional configuration and in which opposed magnetic poles are formed and a gap is formed between said opposed magnetic poles for disposing a vacuum chamber for storage of a charged particle beam; and a pair of upper and lower exciting coils for generating a bending magnetic field in the gap, said pair of exciting coils having a vertical sectional configuration, as viewed along a line tangential to an orbit of the charged particle beam, which is unchanged over a whole length of the bending magnet in a direction of said orbit and asymmetrical with respect to a line vertically intersecting with a line of said orbit such that a vertical distance between said upper and lower exciting coils measured at an outer circumference side of said orbit in said vertical sectional configuration is larger than that measured at an inner circumference side of said orbit; said storage ring further comprising means for connecting said plurality of bending magnets so as to provide a path for said orbit or the charged particle beam through the vacuum chambers of said plurality of bending magnets and means for injecting the charged particle beam into said path. - View Dependent Claims (7)
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8. A bending magnet for use in apparatus for an orbiting charged particle beam which comprises in a vacuum chamber a magnetic core which is substantially sectored or semi-circular in configuration in an orbit plane of said charged particle beam with upper and lower poles which are on opposite sides of said beam forming a gap for said beam;
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means including upper and lower exciting coils for generating a bending magnetic field in said gap for making uniform the distribution of the magnetic flux both in a radial direction and over the entire length of the bending magnet in a direction along the beam orbit. - View Dependent Claims (9)
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10. A bending magnet comprising:
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a core which is substantially sectoral or semi-circular in horizontal sectional configuration and in which opposed magnetic poles are formed and a gap is formed between said opposed magnetic poles for disposing a vacuum chamber for storage of a charged particle beam; and a pair of upper and lower exciting coils for generating a bending magnetic field in the gap, said pair of exciting coils having a vertical sectional configuration, as viewed along a plane vertical to the orbit of the charged particle beam, which is unchanged over a whole length of the bending magnet in a direction of said orbit and asymmetrical with respect to a line vertically intersecting with a line of said orbit so that a vertical distance between said upper and lower exciting coils measured at an outer circumference side of said orbit in said vertical sectional configuration is larger than that measured at an inner circumference side of said orbit, thereby making the distribution of the magnetic flux in the radial direction and the circumferential direction in the bending magnet substantially uniform over the whole length of the bending magnet.
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Specification