Institute for Research in Electronics and Applied Physics


A joint Institute of the
College of Computer, Mathematical and
Physical Sciences
and the A. James Clark School of Engineering

Gyroklystron Program

Design, Test, and Manufacture

Bart working on the CNC lathe CNC lathe - This is a computer numerically controlled lathe which vastly accelerates our production of all pieces, but enables us to create nonlinear transitions of the system which minimize the conversion of our propagating mode to other competing modes. We see Bart making a taper on it.

Portrait of the CNC mill CNC mill - This is the companion to the lathe which helps us create everything that is either not circularly symmetric or too large for the lathe. Here Phil has been making an inner conductor to a test piece for our acclerator compatible output cavity.

Input cavity cold test Cold test- This is a picture of our HP (now Agilent) 8720D Vector Network Analyzer hooked up to our vacuum jacket for a 'cold test' (that is a test of the circuit without the electron beam in it) which characterizes the frequency properties of the cavity.

waveguide mode converters Rectangular to circular converters - These are two waveguide arms that convert our input guiding system from its rectangular origins into circular waveguide so that it has better injection/reflection properties. These were largely designed and built in-house.

calibration of the directional coupler Directional coupler calibration This picture shows the directional coupler being calibrated. This piece is one of the pieces that provides the attenuation for the power measurement, so this measurement is one of the more critical that we will make.

amplifier discriminator Mixer circuit - I did not know where to put this picture. This is a small mixer circuit to tell us if we have some phase coherence between the input and output pulses - that is, if we are amplifying.

Serpentine mode converter Serpentine mode converter - This is a picture of the mandrel (this is an aluminum piece that will be plated with copper and then eaten out, so it is a 'negative' of the final piece) of a serpentine mode converter Wes Lawson designed and Bart Hogan built. It takes a TE11 mode and converts to a TE01 or TE21 mode.

Picture of the shop Wide angle view of our shop - This is our shop, lathes on the right, mills in the far left. Good place to get things done.

Tantawi converter in pieces Tantawi parts - This is a picture of a Tantawi converter which is a strange type of mode converter. It duplicates the Marie' coupler function, taking a TE10 rectangular mode and converts to a TE01 circular waveguide mode. This coupler has less breakdown problems and is much shorter than a Marie' coupler, however. This piece will be cold-tested and included in our accelerator compatible system.



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