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A Radio Frequency Quadrupole (RFQ) based 14 MeV Neutron generator is being developed at BARC, as a part of its ADSS program. It is estimated that RF power of about 70 KW is required in RFQ to accelerate 1mA deuterium beam up to 400 KeV. Hence two RF systems, feeding power of about 35 KW at each of the two ports of the accelerator, are being developed. Each RF system employs a 100 W solid state driver, 1500 W intermediate power amplifier (IPA) using EIMAC 8938, and a high power amplifier (HPA) using TH571B. Solid state driver has been tested to 100 W. The IPA has been tested to 100 W in grounded grid configuration and with half wavelength strip line output circuit. The HPA cavity with tube is installed and being analyzed at low power. The 6 1/8 inch, 50 Ω coaxial transmission line has been simulated in Microwave Studio for analyzing RF parameters. The anode power supply (12KV/10 Amp) of HPA has been tested and installed. A spark gap based crowbar circuit for anode is under construction. For HPA the thyristor based safeguard circuit for screen grid, a ramping filament control circuit (0 to 8 Volts in 5 minutes) and an overall control-interlock system has also been developed.
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