Rotating Target


A large diameter rotating target wheel has been designed to be used in the sliding seal scattering chamber. It allows high beam currents to be used on targets which would otherwise melt.
A large wheel accomodates many individual targets around its circumference. The target is rotated by a motor outside the chamber connected via a ferrofluid feedthrough. The wheel position is kept track of by a shaft encoder. A custom-designed CAMAC module reads this encoder and generates a signal which can be used to sweep the beam away while a wheel spoke is in the path of the beam. The target position for each event can also be incorporated in the data stream.


Setting Up the Rotating Target

Last Updated: May 23, 1996 (D.J. Blumenthal,