Document Type

Annual Report

Publication Date



All technologies for the transmutation of nuclear waste require a large source of neutrons. One of the principal methods of generating these neutrons is by using a particle accelerator to bombard a heavy metal target. One of the more promising designs for particle accelerators for transmutation systems is the Superconducting Radio Frequency (RF) high-current linear accelerator (linac). The power supplies for these systems have three major components: niobium cavities, power couplers, and cryomodules. This research project will develop models to predict the behavior and performance of the niobium cavities, which will then be used to design and optimize the superconducting structures.

The overall goal of this research project is to develop a stronger understanding of the multipacting phenomenon, and to use this understanding to optimize the design of niobium cavities to minimize or eliminate this parasitic phenomenon.

To achieve this goal, the research team established the following objectives for the first year of this program:

  • To study the effect of multipacting on niobium cavities with single and multiple cells;
  • To improve the uniformity of surface finish in chemical etching; to investigate the relationship between the shape and surface condition of the cell and its performance;
  • And, to provide a systematic approach for improving the performance of the niobium cavities.


Elliptical cells; Holes; Linear accelerators; Niobium cavities; Niobium – Surfaces; Radio frequency; Resonant radio frequency; Surface preparation; Surfaces (Technology); Superconducting radio frequency; Superconductivity

Controlled Subject

Linear accelerators; Radio frequency; Superconductivity


Electrical and Computer Engineering | Mechanical Engineering | Metallurgy | Nuclear Engineering

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74 KB