SU1646481A1 - Superconducting accelerating structure - Google Patents

Description

(46) 06/30/92, Rksh. K 24 (2) 4746097/21 (22) 03.10.89 (72) K.A.Sokolov

(53) 621.384.6 (088.8)

(56) - Sokolov PA, Progress in the technique of superconducting high-frequency systems of accelerators of charged particles, Review OB-05, L .: NIIEFA, J988. Bensick W. et AZ. Proceedings of the 1987, IEEE Particle-Accelerator for Conference Washington, 1987, p.1887.

(54) SUPERCONSTRUCTIVE HS, RINGING

STRUCTURE

(57) The invention relates to an accelerator technique. The purpose of the invention is to increase the acceleration rate and the magnitude of the accelerated current. The essence of the invention is that the accelerating structure in the form of a round corrugated tube with elliptic resonator cells is made detachable in radial planes so that it contains two or more separate sectors I and 2 with autonomous helium baths 3 separated from each other by gaps between the side radial walls 4 and placed in a vacuum container 5. 2 Il.

 This invention relates to accelerator technology, in particular, electron accelerators and high-frequency separators for particles.

1 {of the present invention is an increase in the acceleration rate and the magnitude of the accelerated beam current.

Fig. 1 shows a variant of the proposed construction of a detachable superconducting accelerating structure; in fig. and b - projections of the upper sector of this structure,

The ka of FIG. 1 depicts a three-sector detachable superconducting accelerating structure consisting of an upper 1 and two side sectors 2 with autonomous helium baths 3 separated from each other by vacuum gaps 4, and placed by a vacuum. container 5 on supports 6. The combination of sectors 1 and 2 forms a corrugated pipe.

Figure 2 shows the upper sector of this RF structure, consisting of a working wall 7, two lateral radial planes 8 with elements of end spans 9 and a node 10 for adjusting and fixing the radial clearances during assembly, the outer shell 1 and end kryi-ik) 2,

As a working EO-type of oscillation, the high-frequency current flows only in the axial direction and the radial clearances of the mevdu sectors do not cause additional losses of the high-frequency function. A superconducting RF structure consisting of two sectors can be used to stabilize the polarization plane of a deflecting field in a parator of charged particles. In accelerating structures of three or more sectors, radial gaps, as well as cuts in disks-diaphragms, prepa- rage

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05

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excitation of asymmetric waves of higher types of oscillations that limit the magnitude of the limiting current of an electron beam accelerated in superconducting RF structures.

Claims (1)

Superconducting RF structures of known construction, made of high-purity niobium, withstand accelerating fields typically 5-6 MV / m in the best samples - up to 15.3 MV / m, while the theoretical limit for niobium is MU MV / m, and for niobium stanida 100 kV / m. Invention Formula The superconducting accelerating structure of the electron accelerator contains a round corrugated tube with resonator cells of an elliptical shape, characterized in that, in order to increase the acceleration rate and increase the magnitude of the accelerated current of the beam, the corrugated tube is split in radial planes with two or more individual sectors with autonomous helium baths, separate gaps between the side radial walls, and placed in an additionally introduced vacuum container. "ABOUT