Multipactor in a Coaxial Line Under the Presence of an Axial DC Magnetic Field

The main goal of this letter is the analysis of the multipactor effect within a coaxial waveguide structure when an external axial dc magnetic field is applied. We have designed and manufactured a coaxial waveguide sample that has been immersed within a long solenoid. Numerical and experimental results confirm a significant change in the RF breakdown behavior with regard to the case without the axial dc magnetic field, as well as the existence of single- and double-surface multipactor regimes. Good agreement between theory and experimental data has been found.
Manuscript received January 23, 2012; accepted January 31, 2012. Date of publication March 16, 2012; date of current version April 20, 2012. This work was supported in part by the Spanish Government through R&D project TEC2010-21520-C04-01. The review of this letter was arranged by Editor E. A. Gutierrez-D.