Abstract
This chapter presents a short report on the variable energy cyclotron at Chandigarh. The variable energy cyclotron, which was transferred from the department of Physics, Rochester University, Rochester, USA, is functioning satisfactorily at Chandigarh. The machine is housed in an underground building of about 80′ × 80′. Apart from repairing, renovating, and suitably modifying the various components, a few major modifications have been made, which have improved the functioning of the machine. The Dee and the central stem of the cavity have been directly connected together electrically and not through a press contact as before. This change has reduced the radiofrequency heating because of contact resistance to a very large extent. Another 12″ diffusion pump with 2000 liters/sec capacity has been added to increase the pumping speed. This additional pump has resulted in a very stable operation of the oscillator. The vacuum chamber containing the Dee has been supported from inside with brass supports, and further spacers have been provided between the chamber and the pole pieces. These spacers helped us to obtain undisturbed vacuum with or without the main magnetic field.
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