Design, fabrication, installation, and testing of high energy sweeper

A room temperature high-energy sweeper had been designed, fabricated, and installed at the postacceleration section of the Tandem accelerator. The sweeper, a part of the new pulsing system, is being used to inject the bunched beam without dark current into the linear accelerator acting as a booster of the Tandem. The resonance frequency of the sweeper was set at $6.0625MHz$ and a quality factor of $∼1300$ was achieved. During off-line testing of the sweeper, a deflector voltage of $∼30kV$ had been measured for an input power of $300W$⁠. A pair of indigenously fabricated capacitors is used for fine-tuning of the resonance frequency. The silver plated coil of the tank circuit was fabricated with two concentric copper tubes. During the successful beam test of the sweeper, a peak to dark current ratio of 97% has been achieved.