Multipactor Physics, Acceleration, and Breakdown in Dielectric-Loaded Accelerating Structures

[摘要] The objective of this 3-year program is to study the physics issues associated with rf acceleration in dielectric-loaded accelerating (DLA) structures, with a focus on the key issue of multipactor loading, which has been found to cause very significant rf power loss in DLA structures whenever the rf pulsewidth exceeds the multipactor risetime (~10 ns). The experiments are carried out in the X-band magnicon laboratory at the Naval Research Laboratory (NRL) in collaboration with Argonne National Laboratory (ANL) and Euclid Techlabs LLC, who develop the test structures with support from the DoE SBIR program. There are two main elements in the research program: (1) high-power tests of DLA structures using the magnicon output (20 MW @11.4 GHz), and (2) tests of electron acceleration in DLA structures using relativistic electrons from a compact X-band accelerator. The work during this period has focused on a study of the use of an axial magnetic field to suppress multipactor in DLA structures, with several new high power tests carried out at NRL, and on preparation of the accelerator for the electron acceleration experiments.

[发布日期] 2016-07-01

[学科分类] 核物理和高能物理

[关键词] ELECTRONS;DIELECTRIC MATERIALS;ACCELERATION;POWER LOSSES;GHZ RANGE 01-100;RELATIVISTIC RANGE;ACCELERATORS;BREAKDOWN;MAGNETIC FIELDS;POWER RANGE 10-100 GW;RELATIVISTIC RANGE dielectric-loaded accelerating structures;X-b