Recent developments at Pelletron
Various developments to improve the performance of the Pelletron accelerator have been implemented over the last decade.
¨ Installation of resistor chains
For a steady operation of the electrostatic accelerator, the uniform division of the high voltage is essential and was achieved in the original design using sharp corona needles. These corona needles required a frequent replacement because of the degradation in performance due to aging. This problem was overcome by replacing the needles with large value resistors (1 Giga ohm), which has resulted in a remarkable improvement in the voltage stability. Moreover, the machine can be operated at very low terminal voltages, which was not possible earlier.
¨ An electrostatic offset quadrupole (charge selector) at the terminal of the Pelletron has been designed and fabricated to minimize electronic loading from undesired charge states (after stripping in the terminal section).
¨ To facilitate easy beam changes, a multi cathode target wheel for SNICS ion source has been fabricated.
¨ High current proton irradiation setup (6m level)
¨ Installation of new accelerating tube at ion source
¨ Upgraded RF control electronics for bunching system
¨ Re-circulating turbo pumping system for Terminal gas stripper
¨ Major civil repairs of Experimental hall, Accelerator tower and Laboratory block
¨ Upgraded electrical distribution & emergency DG