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CCR has decades of experience efficiently creating products that are primarily used in high energy physics and fusion research.

Our Products

RF Windows

CCR develops high power RF windows from 400 MHz to more 100 GHz at power levels form a few watts to more than 100 MW.

RF Sources

CCR develops RF sources from 350 MHz to more than 100 GHz. Sources include magnetrons, power grid tubes, klystrons (single and multiple beam), gyrotrons, traveling wave tubes, and multiple beam inductive output tubes.

Electron Guns

Delivered guns include single, sheet, and multiple beam devices. These have operated from a few kV up to 500 kV with current from milliamps to kiloamps.


CCR’s water loads are the highest power loads for gyrotrons commercially available anywhere in the world, operating from a few hundred kilowatts to 1.8MW. Rectangular waveguide loads can be designed up to several hundred kilowatts CW and 5 MW pulsed.

Waveguide Components

CCR designs a number of specialized components for rectangular and circular waveguide transmission lines, including vacuum pumpouts, mode converters, miter bends, and tapers. Circular guide expertise included both smooth wall and corrugated guide.

George Collins

George Collins is the Operations Manager, responsible for part procurement, fabrication, assembly, tests, and laboratory operations. He is highly skilled in SolidWorks and approves all mechanical designs in the company. He’s the primary interface with suppliers and vendors and ensures timely delivery and high quality of procured and machined products. He is responsible for high voltage and electron beam processing, including bakeout, hi-potting, and cathode activation. He is highly skilled in precision assembly involving complex interfaces and tight tolerance bonds. He is a major contributor to the mechanical design of all CCR products.

David Marsden

David Marsden is the company’s mechanical designer, responsible for transitioning advanced electron beam and electromagnetic devices from computational models to fabricated devices. He is highly skilled in 3D design and analysis using SolidWorks. Prior to joining CCR in 2001, Mr. Marsden worked as a Senior Mechanical Designer/Department Supervisor at Communications & Power Industries (Palo Alto, CA) and as a Senior Mechanical Designer/CAD Operator at Varian Associates, Inc. (Palo Alto, CA). Since joining CCR, he’s designed gyrotrons, multiple, sheet, and single beam klystrons, traveling wave tubes, multiple beam inductive output tubes, multiple beam power grid tubes, electron guns from a few kV to more than 250 kV, RF loads up to 2 MW, and many RF windows and waveguide components. He is highly skilled in ceramic bonding techniques and designs braze, electron beam, laser beam, tungsten arc, and diffusion bonded joints. Essentially all CCR products are high vacuum devices.

Thuc Bui

Thuc Bui (M’03) received the M.S. from the University of California at Berkeley and Engineer degree in Applied Mechanics from Stanford University. He has performed extensive research in finite element methods and developed and implemented three-dimensional, linear, tetrahedral and hexahedral elements to solve problems in elasticity and compressible fluids and supersonic flows. He is currently using object-oriented programming techniques and finite element methods to solve charged particle beams problems. Mr. Bui is also an experienced user of the finite element codes Marc, Ansys, Ansoft’s Maxwell 2D, Ansoft’s High Frequency Structure Simulator (HFSS), and the finite difference codes Poisson, Superfish, and xgun. He designed several products, including the inductive output tubes (IOTs) electron guns, input and output cavities, and state-of-the-art collectors dissipating 3.5 kW/in2 power densities. Mr. Bui is the principle author of Beam Optics Analyzer and developed the particle pusher, emission algorithms, electric and nonlinear magnetic field solvers and the integration of the mesh generator. He also implemented emission of thermal electrons, temperature limited emission algorithms, self magnetic field calculations, magnetic-to-electric mesh interpolation, variable time stepping algorithms, space charge deposition routines, non-uniform cathode emission, space charge neutralization, and analysis of injected beams.

Thomas Habermann, PH.D.

Quality Assurance

Dr. Habermann received a Ph.D. (Dr. rer. nat.) in Physics from the University of Wuppertal (Germany) in 1999, where he conducted research in field emission. He investigated carbon nanotubes, CVD diamond thin films, diamond-coated silicon microstructures for cold cathode applications, as well as researched the basic mechanisms of ‘parasitic’ field emission impacting superconducting RF cavities used in particle accelerators. From 2000 to 2019 he worked at Communications and Power Industries in Palo Alto, CA, on the development and manufacturing of klystrons. Dr. Habermann managed multiple programs to develop, produce and deliver prototypes or initial production runs of new vacuum electron devices. He contributed to numerous programs within the company and provided engineering support in production. In 2019 Dr. Habermann joined Calabazas Creek Research where he is supporting various R&D programs. He is also responsible for the company’s Quality Assurance.

Lawrence Ives, PH.D.

President & Founder

Lawrence Ives received the Ph.D. degree in Plasma Physics in 1984 and joined Varian Associates, Inc. as a gyrotron engineer. In 1986 he became manager of the High Power Klystron Department, which was responsible for klystron development and production from UHF through C-Band. Dr. Ives founded Calabazas Creek Research, Inc. in 1994 and led development of high power RF loads, multiple beam and sheet beam klystrons, backward wave oscillators, gyrotrons, TWTs, inductive output tubes, controlled porosity reservoir cathodes, advanced electron guns, high power RF windows, reservoir photocathodes, and advanced coatings for emission suppression and corrosion mitigation. He is currently developing multiple beam grid tubes, advanced multipactor coating processes, and gyrotron couplers, as well as integrating 3D printing into high power RF products.

Michael Read, PH.D.

Chief Scientist

Dr. Michael Read – Dr. Read received his Ph.D. in 1976 from Cornell University in Electrical Engineering and Plasma Physics. He worked at the Naval Research Laboratory (NRL) and from 1983 to 1986 was head of the Gyrotron Oscillators and Plasma Interactions Section of Plasma Physics Division. In October 1986, he joined Physical Sciences Inc., where he became Manager of the Electromagnetic Technology Area. Dr. Read joined Calabazas Creek Research in 1999, where he is Chief Scientist and responsible for electron gun, magnetics, and RF circuit design. He is currently leading development of a multiple beam electron gun for a Ka-Band TWT, a 100 kW CW L-Band ultra-high efficiency klystron, and a high power phase-locked magnetron.