Mini Course

We are pleased to announce that we are starting a mini-course on vacuum electronics technology under the auspices of the Nineteenth International Vacuum Electronics Conference (IVEC) that will be held in Monterey, California on April 24-26, 2018. The minicourse will be held on April 23, 2018 at the Marriott Conference Center in Monterey where the main conference will also be held. The lectures will focus on the science and technology of vacuum electronics devices of both the slow and fast-wave persuasion. The lectures will cover the introduction to the physics of these devices and methods and techniques for designing various subsystems.

Attendees at this mini-course can obtain an IEEE Certificate that offers Continuing Education Units (CEUs) and Professional Development Hours (PDHs) for attending.  An IEEE Certificate is a guarantee of educational quality and a credential that engineers can proudly share.  In order to receive this you would need to make sure you fill out an evaluation form onsite and hand it back in to the IVEC registration desk in the Ballroom Foyer.

Click here to view the Mini Course .pdf for full information.

Prof. John Booske, University of Wisconsin, Madison, WI, USA

John Booske received the Ph.D. degree in nuclear engineering from the University of Michigan, Ann Arbor, MI, USA, in 1985. From 1985 to 1989, he was a Research Scientist with the University of Maryland, College Park, MD, researching magnetically confined hot ion plasmas and sheet-electron-beam free electron lasers. Prof. Booske has been with the faculty of the Department of Electrical and Computer Engineering, University of Wisconsin-Madison (UW), Madison, WI, USA, since 1990. There, he is currently the Chair of the department, Director of the Wisconsin Collaboratory for Enhanced Learning (facilities for IT-assisted, peer-collaborative, active learning), and holds the titles of Duane H. and Dorothy M. Bluemke Professor of Engineering and UW-Madison Vilas Distinguished Achievement Professor. His research interests include experimental and theoretical study of coherent electromagnetic radiation, its sources and its applications, spanning the RF, microwave, millimeter-wave, and THz regimes. His recent research activities include vacuum electronics, microfabrication of millimeter-wave and THz regime sources and components, high-power microwaves, advanced cathodes, physics of the interaction of rf-to-thz radiation and materials, microwave-generated plasma discharges, electromagnetic metamaterials and biological applications of electric and electromagnetic fields.

Introduction to Linear Beam Tubes

Course content (preliminary) – This lecture will cover introduction to linear beam tubes such as klystrons, traveling wave tubes and their derivatives. The beam wave interaction mechanism and the physics of electron bunching and energy extraction will be discussed. The state-of-the-art in such devices and their recent advances in the terahertz frequency regime will be presented.

Prof. Manfred Thumm, Karlsruhe Institute of Technology, Karlsruhe, Germany
Distinguished Lecturer of IEEE NPSS

Manfred Thumm (SM’94-F’02) was born in Magdeburg, Germany, on August 5, 1943. He received the Dipl. Phys. and Dr. rer. nat. degrees in physics from University of Tübingen, Germany, in 1972 and 1976, respectively.
At the University of Tübingen he was involved in the investigation of spin-dependent nuclear forces in inelastic neutron scattering. From 1972 to 1975 he was Doctoral Fellow of the Studienstiftung des deutschen Volkes. In 1976 he joined the Institute for Plasma Research in the Electrical Engineering Department of the University of Stuttgart, Germany, where he worked on RF production and RF heating of toroidal pinch plasmas for thermonuclear fusion research. From 1982 to 1990 his research activities were mainly devoted to electromagnetic theory and experimental verification in the areas of component development transmission of very high power millimeter waves through oversized waveguides and of antenna structures for RF plasma heating with microwaves. In June 1990 he became a Full Professor at the Institute for Microwaves and Electronics of the University of Karlsruhe, Germany, and Head of the Gyrotron Development and Microwave Technology Division, Institute for Technical Physics, Research Center Karlsruhe (Forschungszentrum Karlsruhe: FZK). From April 1999 to September 2011, he was the Director of the Institute for Pulsed Power and Microwave Technology, FZK, where his current research projects have been the development of high power gyrotrons, dielectric vacuum windows, transmission lines and antennas for nuclear fusion plasma heating, and industrial material processing. On October 1, 2009, the University of Karlsruhe and the FZK have merged to the Karlsruhe Institute of Technology (KIT). M. Thumm has authored/co-authored 6 books, 21 book chapters, 373 research papers in refereed scientific journals, and more than 1470 conference proceedings articles. He holds 14 patents on active and passive microwave devices.
He is member of the IEEE EDS Vacuum Devices Technical Committee and former member of the NPSS PSAC Executive Committee, a member of the Chapter 8.6 Committee Vacuum Electronics and Displays of the Information Technical Society in German VDE (Chairman from 1996 to 1999) and a member of the German Physical Society. From 2007 to 2008 he was an EU member of the ITER Working Group on Heating and Current Drive, the vice chairman of the Scientific-Technical Council of the FZK and the vice chairman of the Founding Senate of the KIT. From 2008 to 2010 he was the deputy head of the Topic Fusion Technology of the KIT Energy. He was the General Chair of the IRMMW-THz 2004 and IEEE ICOPS 2008 Conference in Karlsruhe, Germany. He has been a member of the International Organization and Advisory Committees of many International Conferences and a member of the Editorial Boards of several ISI refereed journals. From 2003 to 2010 he was the ombudsman for upholding good scientific practice at FZK/KIT. Since 2012 he has been Editor for Vacuum Electronics Devices of IEEE Trans. Electron Devices and Distinguished Lecturer of IEEE NPSS and since 2013 KIT Distinguished Senior Fellow and member of the International Advisory Committee of Cooperative Innovation Centre of THz Science in China. Since 2016 he serves as member of the Scientific Advisory Council of the Leibniz Institute for Plasma Science and Technology Greifswald.
He was awarded with the Kenneth John Button Medal and Prize 2000, in recognition of outstanding contributions to research on the physics of gyrotrons and their applications. In 2002, he was awarded the title of Honorary Doctor, presented by the St. Petersburg State Technical University, for his outstanding contributions to the development and applications of vacuum electron devices. He received the IEEE-EDS 2008 IVEC Award for Excellence in Vacuum Electronics for outstanding achievements in the development of gyrotron oscillators, microwave mode converters and transmission line components, and their applications in thermonuclear fusion plasma heating and materials processing. Together with two of his colleagues he received the 2006 Best Paper Award of the Journal of Microwave Power and Electromagnetic Energy and the 2009 CST University Publication Award. In 2010 he was awarded with the IEEE-NPSS Plasma Science and Applications Award for outstanding contributions to the development of high power microwave sources (in particular gyrotrons) for application in magnetically confined fusion plasma devices as well as for stimulation and establishing of extensive international co-operations. He is a winner of the 2010 open grant competition of the Government of the Russian Federation to support scientific research projects implemented under supervision of Leading Scientists at Russian institutions of higher education (with Novosibirsk State University). Together with A. Litvak and K. Sakamoto he has been the recipient of the EPS Plasma Physics Innovation Prize 2011 for outstanding contributions to the realization of high power gyrotrons for multi-megawatt long-pulse electron cyclotron heating and current drive in magnetic confinement nuclear fusion plasma devices. In 2012 he was awarded with the Heinrich Hertz Prize of the EnBW Foundation and the KIT for outstanding contributions to generation, transmission and mode conversion of high and very high microwave power for nuclear fusion and the HECTOR School Teaching Award in Embedded Systems Engineering. In 2017 he received the Exceptional Service Award of the IRMMW-THz Society.

This lecture will cover introduction to fast-wave devices such as gyrotrons, their derivatives and free electron masers. The beam wave interaction mechanism and the physics of electron bunching and energy extraction will be discussed. The development of continuous wave gyrotrons with megawatt level power for use in plasma heating will be presented. The lecture will also cover the development of terahertz gyrotrons for use in novel applications such as in spectroscopy and the use of gyro-amplifiers in millimeter-wave radar.

Dr. Richard True, L3 Technologies (Retired), USA

Richard True served as Chief Scientist for 25 years at Litton EDD, NGC, and L-3 Communications until his retirement in 2016. Over the years, he designed most of the electron beam optical systems in the travelling wave tubes, klystrons, and other devices manufactured by EDD using theories and software that he originated including DEMEOS. He has published numerous papers, he holds many patents, and he has received numerous IEEE and other awards. Three awards of special note are an IEEE Third Millennium Medal, John R. Pierce Award for Excellence in Vacuum Electronics, and L-3 Communications Best Engineer Award (the first year for this corporate award). He is a graduate of Brown University (Sc.B. in EE) and holds graduate degrees from the University of Connecticut (M.S. in Microwave Engineering and Ph.D. in Electrophysics). Dr. True is an IEEE Life Fellow.

Pierce Guns and Beam Focusing

Course content (preliminary) – This lecture will cover diode and gridded Pierce guns and beam focusing in microwave and millimeter wave tubes such as TWTs and klystrons. Analytical methods and computer-aided design techniques and codes useful in their design will be presented.

EunMi Choi, Department of Physics, Ulsan National Institute of Science and Technology (UNIST), Republic of Korea

EunMi Choi earned her Ph.D degree in physics department at Massachusetts Institute of Technology, USA in 2007 after receiving her B.S. and M.S. in physics department at Ewha Womans University and POSTECH in South Korea, respectively. Her thesis topic was to study a high efficiency MW gyrotron for fusion applications. She worked as a post-doctoral researcher at Brookhaven National Laboratory in 2008, and moved to Houston, Texas to work as a tool physicist at Schlumberger.

She joined in school of electrical and computer engineering at Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea as an assistant professor in 2010, and ranked to associate professor in physics department in 2014. In 2017, she was selected as a “Rising-Star Distinguished Professor” at UNIST.

Her research focus is to develop a vacuum based high power, compact sources in millimeter and THz waves and utilize the source for various applications such as to detect a long distance radioactive material, communications, plasma switching, medical imaging, probing system of semiconductor carriers, etc. Her group’s recent achievement can be found more in

Cavities, Waveguides and Transmission Lines

Course content (preliminary) – This lecture will cover the basic physics of cavities, waveguides and transmission lines. The design of these devices for use as subsystems in microwave tubes and their application in guiding microwave power will be discussed.

Dr. Simon Cooke, Naval Research Laboratory, Washington, D.C.

Simon Cooke received the B.Sc. in Physics from the University of Strathclyde, Glasgow, Scotland, in 1988 and the D.Phil. degree from the University of Oxford, Oxford, England, in 1993. Since 1993 he has researched new computational methods to accurately model a broad range of electron-beam, plasma, and electromagnetic devices, at the University of Strathclyde from 1993 to 1996, at the University of Maryland, College Park, MD from 1996 to 1998, and with Science Applications International Corporation, McLean, VA from 1998 to 2003. Since 2003 he has been with the Electromagnetics Technology Branch at the U.S. Naval Research Laboratory, Washington, DC, where he leads research into 3-D simulation algorithms to model complex RF and electron-beam devices. His current research interests include parallel electromagnetic particle-in-cell algorithms for GPUs, to enable fast, accurate design of advanced vacuum electronic amplifiers in the mm-wave to THz frequency range.

Dr. Cooke has been a Member of the IEEE NPSS since 1995 and Senior Member since 2012. He was a Guest Editor for the IEEE Transactions on Plasma Science Special Issue on High Power Microwaves in 2005 and for the IEEE Transactions on Electron Devices Special Issue on Vacuum Electronic Devices in 2014. He served on the IEEE NPSS Plasma Science and Applications Executive Committee between 2009 and 2011. In 2002, he was the recipient of the IEEE NPSS Early Achievement Award, and he received the Alan Berman Research Publication Award at the Naval Research Laboratory in 2006 and 2008. In 2014, he received the Dr. Delores M. Etter Top Navy Scientists and Engineers of the Year Award, and in 2016 he received the Naval Research Laboratory Edison Chapter Sigma Xi Award for Pure Science.

Physics of Simulation Tools for Vacuum Electronics Devices

This lecture will cover the physical models, equations and numerical methods that are used by modern simulation tools for vacuum electronic device design. Topics will include: basic electromagnetic theory for vacuum electronics, electron beam “gun” codes, frequency-domain electromagnetic solvers, time-domain electromagnetic particle-in-cell (PIC) codes, and custom “large-signal” codes. 

Dr. Stephen Cauffman, Communications & Power Industries, Palo Alto, CA, USA

Steve Cauffman earned his B.S. in Physics from Stanford University in 1991, and his Ph.D. in Plasma Physics from Princeton University in 1997. His graduate work at the Princeton Plasma Physics Laboratory involved the measurement and analysis of cyclotron instabilities driven by charged fusion products generated by deuterium-tritium plasmas in the Tokamak Fusion Test Reactor.
Dr. Cauffman joined the Millimeter-Wave/Gyrotron Technology Team in CPI’s Microwave Power Products Division in 1997, and is actively engaged in the design and development of high-power gyrotron oscillators and amplifiers, specializing in the modeling of interaction cavities, electron guns, depressed collectors, and quasi-optical mode converters and mirror systems.
As a member of CPI’s Gyrotron Team for over 20 years, Dr. Cauffman has contributed to the designs of numerous oscillators optimized for a wide range of frequencies and power levels, and works hard to convey the impression that he knows what he is doing. He served as a Guest Editor for the 2012 IEEE Transactions on Plasma Science Special Issue on High Power Microwaves, which was the most recent such issue to have been published at the time.

Design of Electron Guns and Collectors for Gyrotrons

This lecture will present design principles, analysis techniques and simulation methods for optimizing the performance of electron guns and depressed collectors in gyrotrons.

Gun topics will include:
– adiabatic parameter variation in annular beams
– magnetron injection guns
– diode vs. triode guns
– space charge effects in temperature-limited guns
– design constraints and figures of merit

Collector topics will include:
– challenges in dissipating annular beam power
– non-adiabatic effects
– magnetic sweeping
– collector depression
– diagnostics
– design constraints and figures of merit

Aaron Jensen, Leidos

Aaron Jensen has been a Research Scientist at Leidos since 2016 in Advanced Physics. From 2005 to 2016 he was an Engineer and Engineering Physicist at SLAC National Accelerator Laboratory. From 2007 to 2008 he worked at Communication and Power Industries and SLAC. While at SLAC he authored the large signal klystron code AJDISK and was the project manager and engineer for several high efficiency sources and sheet beam devices. At Leidos he is working on various DoD and DoE programs with an emphasis on high performance computing, optimization, and code development. He performs electron source design, and designs beam transport/focusing systems, advanced high-current electron accelerator components, and multistage depressed collectors. Aaron is a graduate of Oregon Institute of Technology (B.S. in EE with a Minor in Applied Mathematics) and holds a graduate degree from the Stanford University (M.S. in EE).

Design of Depressed Collectors for TWTs

Course content (preliminary) – This lecture will cover the design and modeling of electron guns and depressed collectors for TWTs. The principles for the design and optimization of depressed collectors will be discussed.

Dr. John J. Petillo, Leidos, Billerica, MA, USA

John Petillo has been a Research Scientist at Leidos and SAIC for 31 years in Advanced Physics. He has been the Manager of the Center for Electromagnetics since 2000, overseeing scientists and engineers working on advanced vacuum electronics, plasma physics, laser fusion, including programs with the NRL Vacuum Electronics Branch, NRL Nike & Electra KrF Laser Fusion programs, and various DoD & DoE programs and providing SBIR support. He is the leader of the operation’s Advanced Electromagnetic/Beam Modeling capabilities, with an emphasis on the development of Electromagnetic Particle-in-Cell (PIC) simulation codes. John is the Principal Investigator for the MICHELLE program and manager of the ARGUS & AVGUN code projects. He performs electron and ion source design, and designs beam transport/focusing systems, advanced high-current electron accelerator components, and multistage depressed collectors. He also has experience with ion and electron beam lithography modeling and simulation. Professional Honors include: R&D 100 Award, 2006; the SAIC Technology & Program Management Performance Award, 2006; the SAIC Aspire Award in Science & Technology and Physical Sciences, 2006; The SAIC Corporate Achievement Award in Science & Technology and Physical Sciences, 2006, and is a Leidos and SAIC Technical Fellow and a member of the Leidos Directed Energy, Optics, and Space Technology Division Technical Council. John is a graduate of Northeastern University (B.S. in EE) and holds a graduate degree from the Massachusetts Institute of Technology (Ph.D. in Applied Plasma Physics). John is an IEEE Senior Member

Design of Depressed Collectors for TWTs

Course content (preliminary) – This lecture will cover the design and modeling of electron guns and depressed collectors for TWTs. The principles for the design and optimization of depressed collectors will be discussed.

Dr. Dietmar Wagner, Max-Planck-Institute for Plasma Physics, Garching, Germany

Dietmar Wagner was born in Schwäbisch Hall, Germany, in 1963. He received the Dipl.-Ing. and Dr.-Ing. degrees in electrical engineering from the University of Stuttgart in 1990 and 1996 respectively. He worked on high power millimeter wave transmission line components for his doctoral dissertation and his postdoctoral research at the Institute for Plasma Research at the University of Stuttgart, Germany. From 1999 until 2001 he was with the Gyrotron group at CPI Microwave Power Products Division in Palo Alto, California, where he worked on the design and development of high power Gyrotron oscillators. In 2001 he joined the ECRH group of the Max-Planck Institute for Plasma Physics in Garching, Germany, where he works on the application of high power millimeter waves for fusion plasma heating. Since 2011 he is a lecturer of High Power Microwave Technology at the Aix-Marseille Université, France.

Theory and Design of Waveguide Mode Converters

Course content – This lecture will cover the design of waveguide and quasi-optical mode converters in overmoded systems. Some examples of mode converter designs include mode converters for TE and TM modes in overmoded circular waveguides, mode conversion from the TE11 or TM11 mode to the low loss HE11 hybrid mode and internal mode converters for gyrotrons with Gaussian beam output.