The main source of RF signal for electron linac is master oscillator which should have possibility of ongoing RF frequency adjustment according to actual conditions of the accelerator microwave system such as standing wave ratio variations caused by temperature change. The basis for the construction was GaP monolithic integer-N synthesizer and voltage controlled oscillator in one Analog Devices ADF4360 chip. The generator is easy operable by the user during machine tune-up procedure and produces RF signal in well-defined frequency step, at least 30dB distant from noise level.
Ongoing energy measurement has become mandatory for accelerator installations for radiation sterilization. It is one of the parameters such as: electron beam current, transporter speed, or scanning width, that must be recorded according to the conditions imposed in the accelerator validation procedure. Described measurement method based on the use of a secondary electron collecting electrode has been tested at the electron beam linear accelerator installation typically used for radiation sterilization. Data processing and presentation of the electron beam characteristics is based on the information obtained via dedicated pulse acquisition interface. The energy spectra parameters provide also knowledge of accelerator RF alignment in case of service.
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