rf-induced beam dynamics in rf guns and accelerating cavities
نویسندگان
چکیده
منابع مشابه
Beam Loading in Rf Cavities
Beam loading is the conventional term for the effect of beam passage through an RF cavity installed for the control of some beam parameters such as energy, bunch length, energy spread, etc... The fields developed in such a structure and their effect on the beam can be analyzed as for all other discontinuities of the vacuum chamber. In particular, F. Sacherer's theory of impedances and beam inst...
متن کاملRf Focussing - an Instrument for Beam Quality Improvement in Superconducting Rf Guns
Rf electron guns require an external magnetic field focussing to produce a low emittance electron beam. A dc magnetic field focuses electrons in the beam already inside the cavity as they leave the photocathode. In superconducting rf guns (srf) the possibility of external magnetic focussing is quite limited. In this paper we investigate an effect of rf focussing in the first half cell of a 3+1/...
متن کاملSuperconducting Coatings for Accelerating Rf Cavities: Past, Present, Future
About 200 superconducting RF accelerating cavities of 352 MHz frequency, each consisting of four cells, are required to upgrade the LEP energy from an initial value of 55 GeV to about 90 GeV. About 170 of these cavities, which have already been ordered from European industry, will be made of copper and coated internally with a thin layer of niobium. The coating will be carried out by sputtering...
متن کاملAn RF Chopped Electron Beam Driver for H-Type Cavities
Member of the Graduiertenkolleg (DFG GK-GRK 410/1) During the last three years a high power rf generator design capable of providing several MW rf power at frequencies between 200 and 300 MHz has been investigated. Instead of using conventional techniques for bunch formation in electron beam based generators like grids or longitudinal velocity modulation it is based on an innovative scheme whic...
متن کاملIon Tracking in Photocathode RF Guns
Projected next-generation linac-based light sources such as PERL or the TESLA free-electron laser (FEL) generally assume, as essential components of their injector complexes, long-pulse photocathode rf electron guns. These guns, due to the nature in which they are operated, may be more susceptible to ion bombardment damage of their cathodes than conventional rf guns. This paper explores this po...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Special Topics - Accelerators and Beams
سال: 2015
ISSN: 1098-4402
DOI: 10.1103/physrevstab.18.064801