Coupling Structure for a High-Q Corrugated Cavity as a Microwave Undulator

Abstract

Microwave undulators can achieve smaller wiggler periods when compared with permanent magnet undulators. This work follows on the design of a microwave undulator composed of a corrugated waveguide operating at 36 GHz. Compatible end caps and coupling structures for the waveguide to form a complete cavity were studied and are presented in this paper. Their design is scalable for different operating frequencies and periods of the corrugated waveguide. A set of empirical equations, that allows the geometry to be determined analytically, were found from the post-processing of the FDTD simulation.

Beam dynamic study of a Ka-band microwave undulator and its potential drive sources

“…Using these two approaches a scalable design was achieved at different operating frequencies and different undulator lengths (different period numbers of the regular corrugation sections). More details can be referred to in 16 , 17 . Its main properties are shown in Table 2 .…”

Microwave Undulator to Generate Short-wavelength FEL Radiation

“…It achieved an equivalent Bu of 0.65 T and a period of 13.9 mm [5]. An EM-wave undulator operating at a higher frequency 36 GHz was designed to validate the concept and achieved a scalable design at different lengths and frequencies [6,7].…”

Updates on the Development of MW-level Ka-band Gyroklystron

“…In this paper, a MW-level 36 GHz gyroklystron is designed to drive the linearizer. It can also be used to drive a microwave undulator [10,11] which was also proposed for the CompactLight XFEL.…”