One-channel Ka-band pulse compressor

Abstract

A compact rf pulse compressor, fed by a phase-modulated pulse, is described for producing high-power flattop pulses at Ka-band. The compressor consists of a single axisymmetrical cavity operating in a combination of TE 0n modes (n 1, 2, 3), that have zero electric fields at the walls. This feature enhances the breakdown strength of the system and makes it possible to increase the output power, as compared with a traditional SLED-II pulse compressor. Advantages include use of one channel instead of two, and no requirement for a 3-dB hybrid coupler. This 34 GHz one-channel pulse compressor (OC SLED-II) is designed to multiply peak power produced by the Yale/Omega-P Ka-band magnicon amplifier (30 -40 MW, 0:5-1 s) by 3-4:1 and to compress in time by 5-6:1. The efficiency of the proposed compressor is similar to that of SLED-II. Results of low-power tests carried out on a 30 GHz prototype of the compressor are discussed.

One-channel, multi-mode active pulse compressor

“…A 30 GHz passive prototype of the one-channel compressor was tested in order to demonstrate key principles of operation [5]. The investigated compressor included two TE 02 ↔TE 03 reflectors, a TE 01 →TE 02 mode converter, and a waveguide section of variable length for fine tuning.…”

“…1. It is an axisymmetric multi-mode cavity which effectively operates in a near-reflectionless traveling-wave mode [4,5]. The traveling-wave eigenmode in the pulse compressor consists of the TE 02 mode propagating one way (left-to-right in Fig.…”

rf design of a pulse compressor with correction cavity chain for klystron-based compact linear collider

“…SLED and BOC generate output pulses with an unflattened shape, which is only suitable for single-bunch acceleration, like VLEPP and SLC [16,17]. For multibunch acceleration, SLED-II is preferred because of its high efficiency and flat output pulse [7,15,18,19]. In principle, active pulse compressors can achieve high power gains and high efficiency [20].…”