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Over the last two years THALES ELECTRON DEVICES (TED) has developed and industrialized a new generation of Microwave Power Module (MPM). This generation has been designed for military applications such as data link, radars (illuminators or weather radars) and electronic countermeasures. TED has designed the MPM to be modular. Depending on the future system needs, the MPM can be reconfigured to take...
During the TWT design process, application- specific requirements often define the goals of a TWT development program. These requirements may be germane to most platforms but more often are unique to the given application under consideration. In addition, the performance goals are often conflicting, making the design process more challenging and the balance between the conflicting requirements more...
Communications and Power Industries, Inc (CPI) produced 81 klystrons for the spallation neutron source at Oak Ridge National Laboratory. The klystrons are rated for 550 kW peak at 805 MHz. The klystron production and factory test data provided confidence the device would provide reliable service. Seventy units have accumulated 866,000 hours of filament operation and 633,000 hours of high voltage operation...
Work function is one of the most fundamental electronic properties of a metallic surface. The calculation of work function in our work were performed using density functional theory in the local density approximation, with a plane wave basis set and ultra-soft pseudopotentials or the projector-augmented wave method, as implemented in the Vienna ab-initio simulation package. We put another two tungsten...
The manufacture of cathodes for microwave vacuum electron device industry is in essence the sale of precisely controlled processes verses the sale of goods. The function of a cathode is to produce electrons and while emission testing at cathode level is possible with a beam stick or other such devices to date no economically feasible scheme or device has been developed, that would permit such testing...
An S-band 50 MW klystron (Fig. 4) was successfully developed by the Institute of Electronics, Chinese Academy of Sciences (IECAS) for linear accelerators. A structure of six-cavity and single output window was adopted, and three prototypes were fabricated and tested before November of 2005. Although the first tube suffered from short circuit of heater as reaching operating voltage of 220 kV, the second...
This paper describes the design process for a 1.5 GHz, 120 kW CW injector klystron for use on the Energy Recovery Linac at Cornell University, and presents some of the early test performance data.
Impact on heater coil design due to variation in Tungsten 3 wt% rhenium (WSRe) resistivity between wire suppliers and the resulting influence on hot resistance (Rh).
Results of optimizations calculations of BWO and TWT in a frequency range 37... 3000 GHz are represented. Research of influence of the dimensions of a waveguide, losses, the dimensions of an electron beam on characteristics of devices are carried out.
Latest situation of vehicle safety drive application systems and millimeter-wave radar used for those safety systems are explained. Also, EMI concerns for those advanced electronic vehicle components are focused.
This paper deals with the TH4443, micro- TWT delivering 200 W minimum between 6 and 18 GHz and 100 W minimum at 4.5 GHz, which will be qualified mid 2007. The main electrical and RF test results, as well as design and technology will be addressed.
This paper describes the performance of a new Ka-band 500 W peak power Helix TWT (LD7319) which is a currently under development for the broadband digital satellite communication. The first engineering model is now under evaluation and has achieved the peak output power of more than 500W at saturation.
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