Dr. Baruch Levush Elected a Fellow of the Institute of Electrical and Electronics Engineers


2/26/2001 - 7-01r
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Dr. Baruch Levush, Supervisory Research Physicist in the Electronics Science and Technology Division at the Naval Research Laboratory (NRL), has been elected a Fellow of the Institute of Electrical and Electronics Engineers (IEEE). Dr. Levush was cited for leadership in the development of theoretical and computational models of free electron radiation sources.

Dr. Levush received his M.Sc. in physics from Latvian University in Riga, Latvia in 1972 and his Ph.D. in physics from Tel-Aviv University, Israel in 1981. He received the Dr. Ch. Weizman Postdoctoral Fellowship and attended the University of Maryland for two years. From 1984 to 1985 he was a research scientist with Rafael, Israel. In 1985 Dr. Levush joined the University of Maryland, where his research focused on the physics of coherent radiation sources and the design of high-power microwave sources, such as gyrotrons, relativistic backward wave oscillators, free electron lasers and applications of microwave sources. In 1993 he became a Senior Research Scientist at the Institute of Plasma Physics at University of Maryland. During his tenure at the Institute of Plasma Research, Dr. Levush collaborated with a number of scientists from NRL's Plasma Physics Division, MIT, and the microwave industry in the area of gyrotron research for fusion application. He also had strong collaboration with scientists from the high power microwave community working on the development of very high power microwave sources.

In 1995 Dr. Levush joined NRL as the head of the Theory and Design Section of the Vacuum Electronics Branch. The branch is the principal center for vacuum electronics research and development in the Department of Defense. Dr. Levush is actively involved in developing theoretical models and computational tools for analyzing the operation of existing microwave vacuum devices and in inventing new concepts for high power, high frequency coherent radiation sources. He is the author and co-author of over 100 journal articles. He received a Technology Transfer Award in 2000 and an ARPAD award 1998 from NRL.

Dr. Levush is responsible for formulating and directing several basic and applied research programs conducted at both the Vacuum Electronics Branch and industrial sites. This includes research and development of novel high-performance radiation sources for application in radar, electronic countermeasures and communication. In this regard, Dr. Levush has primary responsibility for providing direction in the development of theoretical modeling and design tools for new radiation sources. In addition, he shares responsibilities with other Vacuum Electronics Program managers for overall content, direction and leadership of several other projects within the Vacuum Electronics Program.

Since future military systems are likely to require a relatively small number of highly specialized vacuum electron devices, a reduction of development costs will have a significant impact on the total cost of the device. Dr. Levush directs the DoD effort in developing a fully integrated suite of design codes for vacuum electron devices.

These design tools will provide the basis for establishing simulation-based design methodology in place of the
present cyclic build-and-test methodology to achieve first-pass design success for vacuum electron devices. The concept of "first-pass design success" calls for balanced optimization via validated computer codes followed by a single hardware demonstration. In other words, the intent is to establish a design capability of sufficient integrity and validity that computational design and optimization will yield a prototype meeting the designed specifications in its first embodiment. Through the use of simulation-based design methodologies, vacuum electron devices manufacturers will have the flexibility to respond quickly to new design specifications for future military systems and to develop new products and product upgrades at minimal cost. Examples of this approach include the millimeter-wave gyro-klystron and microwave power module (MPM).

In support of the NRL WARLOC experimental radar effort, a number of W-band (94 GHz) gyro-klystrons have been designed and optimized using the design tools developed by the team lead by Dr. Levush. These gyro-klystrons met or even exceeded all the design specifications in the first testing at NRL. This provided the foundation for the development of the high average power W-band gyro-klystron in US industry. The demonstration of 10 kW average power from the gyro-klystron is a good example of first-pass design success. Together with his colleagues Dr. Levush received the DoD Robert L. Woods Award for his role in the successful development of the high average power, W-band gyro-klystron.

The recent development of the extremely efficient wide-band power booster (helix TWT) for the MPM provides another example of the impact of such codes on the TWT development cycle. By applying the former accepted approach, the vendor needed to design, fabricate and test 14 successive prototypes over a two-year period to extend the power booster circuit efficiency from 15% to 33%. A subsequent single-step effort, requiring less than two months, extended the circuit efficiency to 42% by using the newly developed TWT design and optimization codes by the team directed by Dr. Levush.



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