Design and test of a beam transformer as a chopper

Author

Chou, W. ; Mori, Y. ; Muto, M. ; Shirakabe, Y. ; Takagi, A.

Author_Institution

Fermi Nat. Accel. Lab., Batavia, IL, USA

Volume

1

fYear

1999

fDate

1999

Firstpage

565

Abstract

This paper introduces a new type of chopper, which is similar to a beam transformer first discussed by R. Wideroe (1928). It is based on the fact that the RFQ has a rather small energy window. A pulsed beam transformer that provides 10% energy modulation to the beam in front of an RFQ can effectively chop the beam. It has fast rise- and fall-time and a short physical length. A prototype, which consists of a cavity and a high voltage pulsed power supply, has been constructed and tested. Two types of magnetic materials were tried for making the core of the cavity-the Finemet and the ferrite Philips 4M2. While the former gave good performance, the latter failed the test. Results from the bench measurements and a plan for beam tests are briefly described

Keywords

accelerator cavities; beam choppers; booster injectors; linear accelerators; proton accelerators; Finemet; RFQ; beam transformer; cavity; chopper; ferrite Philips 4M2; high voltage pulsed power supply; magnetic materials; pulsed beam transformer; Choppers; Ferrites; Magnetic cores; Magnetic materials; Optical modulation; Prototypes; Pulse modulation; Pulse transformers; Pulsed power supplies; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795761

Filename

795761