Halo formation and control in space-charge-dominated electron and ion beams are investigated in parameter regimes relevant to the development of high-power microwave (HPM) sources and highintensity electron and ion linear accelerators. In particular, a mechanism for electron beam halo formation is identified in high-power periodic permanent magnet (PPM) focusing klystron amplifiers. It is found...

Abstract In the framework of Compact Light XLS project [1], a Ka-band linearizer with electric field ranging from 100 to 150 MV/m is requested [2, 3, 4]. order feed this structure, proper high power klystron amplifier efficiency needed. This paper reports possible solution for operating on TM 010 mode at 36 GHz, third harmonic 12 GHz linac frequency, an 44% and 10.6 MW radiofrequency output pow...

The 100-MeV Test Linac was constructed for the high brightness applications such as free electron lasers and coherent radiation generation experiments at PAL. The linac consists of a thermionic RF-gun, an alpha magnet, two accelerating structures, and a beam analysing magnet. The RF-gun is a one-cell cavity with a tungsten dispenser cathode of 3-mm diameter, and the longitudinal matching from t...

An analytical type-A approach is proposed for predicting the Worst-Case Uncertainty of a measurement system. In a set of independent observations of the same measurand, modelled as independentand identically-distributed random variables, the upcoming extreme values (e.g. peaks) can be forecast by only characterizing the measurement system noise level, assumed to be white and Gaussian. Simulatio...

This paper reviews the technology and demonstrated capability of mmW and Sub-mmW Extended Interaction Klystrons at CPI Canada. It discusses design and manufacturing concepts stating self-imposed restrictions and design modifications enhancing power capability, bandwidth and extending operating frequency into the THz region.

A new $X$-band high-power rotating mode SLAC energy doubler (SLED)-type rf pulse compressor is proposed. It based on a novel cavity type, single open bowl-shaped storage with high-quality factor and compact size, which coupled to the waveguide using launcher. The type applied compression system of main linac module klystron-based option Compact Linear Collider. Quasispherical modes ${\mathrm{TE...