1. L3Harris Electron Devices, Torrance, CA, USA
2. SLAC National Accelerator Laboratory, Menlo Park, CA, USA
3. Department of Radiation Oncology and Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, USA
4. Department of Physics and the Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA, USA
5. Department of Chemistry and the Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, MA, USA
6. Beijing Vacuum Electronics Research Institute, Beijing, China
7. RF Equipment and Technologies Section, European Space Agency (ESA), Noordwijk, AG, The Netherlands
8. United Kingdom Atomic Energy Authority, Culham Science Centre, Abingdon, U.K
9. Swiss Plasma Center, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland