Liubing Yu

Email:

lbyu@ucdavis.edu

Education

• Sep 2008 – Present, Department of Applied Science, University of California at Davis, USA
• Sep 2004 – July 2008, Department of Modern Physics, University of Science and Technology of China

Professional Experience

• Sep 2008 – Present, Researching Assistant in Plasma Diagnostics Group, UC Davis, USA

Affiliation

• Applied Science Graduate Group

Research Interests

Plasma diagnostics technology and theory, Phased Array, Millimeter Wave Imaging

Research Activities

My focus of research is developing Electron Cyclotron Emission Imaging (ECEI) and Microwave Imaging Reflectometry (MIR) to measure the electron temperature and density which is very important to understand the basic physics on Tokomak.

Jianxun Wang

Email:

xunwang@ucdavis.edu

Website:

http://tempest.das.ucdavis.edu/personal/jianxun/

Education

• Doctoral Candidate

Professional Experience

• Study in UCDavis from Sept. 2008

Affiliation

• University of Electronic Science and Technology of China

Research Interests

High Power Millimeter wave amplifier and Oscillator

Research Activities

Cusp Harmonic GyroTWT, Sheet Beam Klystron and TWT

Wen-Ching Tsai

Email:

wctsai@ucdavis.edu

Education

• University of California, Davis, CA, Ph.D in Electrical and Computer Engineering, Expected June 2010
• National Tsing Hua University, Taiwan (R.O.C), M.S. in Physics 2004
• B.S. in Physics 2002

Professional Experience

• W. C. Tsai, T. H. Chang, N. C. Chen, K. R. Chu, H. H. Song and N. C. Luhmann, Jr., “Study of Absolute Instabilities in the Gyrotron Traveling-Wave Amplifier,” presented at the 31st IEEE International Conference on Plasma Science, ICOPS 2004
• W.C. Tsai, C.W. Domier, K.C. Lee, N.C. Luhmann, Jr., H.K. Park, “Bandwidth Upgrade for the NSTX FIReTIP System,” poster at the 17th High Temperature Plasma Diagnostics Conference, Albuquerque, New Mexico, USA, May 11-15, 2008
• W.C. Tsai, C.W. Domier, L.R. Barnett, N.C. Luhmann, Jr, “Design and Test of a High Efficiency Energy Recovery Pulse Modulator,” poster at the 7th IEEE International Vacuum Electronics Conference, Monterey, CA, USA, May 18-20, 2010

Affiliation

• UC Davis, Department of Electrical and Computer Engineering

Research Interests

• Millimeter-wave Imaging and Sensors
• Microwave/THz Vacuum Electronics

Research Activities

• Development of IF electronics system of multi-channel far infrared interferometry/polarimetry “camera” for imaging and visualization of density fluctuations in a magnetic fusion plasma device
• Low noise IF electronics system : PCB board design, installation and testing of automatic gain control (AGC) and phase locked loop (PLL) circuits
• Phase comparison electronics: improved circuitry design for a digital fringe counter circuit
• Phase noise analysis: noise estimation by examining power spectral density using Matlab
• High voltage (~ 1 kV) modulator: PSpice simulation, PCB board design, experimental testing of a novel “energy recovery” modulator for a sheet beam klystron

Selected Publications

• W. C. Tsai, T. H. Chang, N. C. Chen, K. R. Chu, H. H. Song and N. C. Luhmann, Jr., “Absolute Instabilities in a High-Order-Mode Gyrotron Traveling-Wave Amplifier”, Phys. Rev. E 70, 056402 (2004)
• H.H. Song, D.B. McDermott, Y. Hirata, L.R. Barnett, C.W. Domier, H.L. Hsu, T.H. Chang, W.C. Tsai, K.R. Chu, N.C. Luhmann, Jr., “Theory and Experiment of a 94 GHz Gyrotron Traveling-Wave Amplifier,” Physics of Plasmas 11, pp. 2935-2941 (2004)
• L.R Barnett, W.C. Tsai, H.L. Hsu, N.C. Luhmann, C.C. Chiu, K.F. Pao, K.R. Chu, “140 kW W-Band TE01 Ultra High Gain Gyro-TWT Amplifier,” 2006 IEEE International Vacuum Electronics Conference held jointly with 2006 IEEE International Vacuum Electronics Sources, IVEC/IVESC 2006, pp. 461 – 462 (2006)

Benjamin John Tobias

Email:

bjtobias@ucdavis.edu

Website:

http://tempest.das.ucdavis.edu/personal/Benjamin/BenjaminTobias_files/slide0003.htm

Education

• Masters of Science in Electrical and Computer Engineering
  University of California at Davis
  Design and Implementation of an Electron Cyclotron Emission Imaging Diagnostic for the TEXTOR Tokamak
  September 2009
• Bachelor of Science in Electrical Engineering
  Arizona State University
  May 2007
• Associate of Applied Science in Electronic Systems Technology
  Community College of the Air Force
  RAF Mildenhall, Suffolk, UK
  February 2003

Professional Experience

• Wideband, Satellite Communications, and Telemetry Journeyman
  422 Air Base Squadron, 100th Air Refueling Wing, United States Air Forces Europe
  RAF Croughton, Northamptonshire, UK
  Senior Airman, E-4, AFSC 2E151
  July 2001 to 2004

Affiliation

• University of California at Davis Plasma Diagnostics Group
  Graduate Student Researcher
  June 2007 to present

Research Interests

• Microwave and Millimeter wave diagnostics for magnetically confined fusion plasmas, including radiometry, reflectometry, and interferometry.
• Magnetohydrodynamic (MHD) phenomena and turbulence in fusion plasmas.
• Plasma heating and current drive.
• Development of millimeter wave and sub-THz frequency sources, amplifiers, mixers, etc.
• Antennas, optics, and quasi-optical frequency filters.

Research Activities

Development of Electron Cyclotron Emission Imaging (ECEI) and Microwave Imaging Reflectometer (MIR) diagnostics and numerical data evaluation techniques for the study of MHD and microturbulence observed as temperature and density fluctuations in tokamak plasmas.

Selected Publications

• B. Tobias, X. Kong, T. Liang, A. Spear, C.W. Domier, I.G.J. Classen, J.E. Boom, M.J. van de Pol, R. Jaspers, A.J.H. Donné, H.K. Park, T. Munsat, and N.C. Luhmann Jr., Advancements in electron cyclotron emission imaging demonstrated by the TEXTOR ECEI diagnostic upgrade, Review of Scientific Instruments 80, 093502 (2009)
• B. Tobias, C.W. Domier, A.J.H. Donné, R. Jaspers, X. Kong, T. Liang, M. Smith, R. Nazikian, H.K. Park and N.C. Luhmann, Jr., A New and Highly Flexible Dual Array Electron Cyclotron Emission Imaging Diagnostic for DIII-D, in proceedings of the Asia-Pacific Microwave Conference 2009, December 7-10, Singapore
• B. Tobias, C.W. Domier, A.J.H. Donné, R. Jaspers, X. Kong, T. Liang, H.K. Park, and N.C. Luhmann, Jr., Dual Array ECE Imaging on the DIII-D Tokamak, in proceedings of the 34th International Conference on Infrared, Millimeter and Terahertz Waves, 21-25 September, 2009, Busan, Republic of South Korea
• G.S. Yun, W. Lee, M.J. Choi, J. Kim, H.K. Park, B. Tobias, C.W. Domier, T. Liang, X. Kong, N.C. Luhmann, Jr., ECE Imaging for KSTAR, in proceedings of the 19th International Toki Conference on Advanced Physics in Plasma and Fusion Research, December 8-11, 2009, Gifu, Japan
• T. Munsat, C.W. Domier, X. Kong, T. Liang, N.C. Luhmann, Jr., B. Tobias, W. Lee, H.K. Park, G. Yun, I.G.J. Classen, A.J.H. Donné, Electron Cyclotron Emission Imaging in Tokamak Plasmas, Applied Optics, accepted for publication December 2009