Foil Changer for the Chalk River Superconducting Cyclotron
Capture of an injected beam in the Chalk River superconducting cyclotron requires that a carbon stripping foil be accurately placed in a dee to intercept the incoming beam. Foil radial position must be precisely adjustable and foils must be easily replaced. A foil changing apparatus has been designed, built and tested to meet these requirements. The main components are a supply magazine, a transport system, and unloading and loading mechanisms. The magazine is on top of the cyclotron. It holds 300 foils and can be isolated from machine vacuum for refilling. Each foil is mounted on a stainless steel frame. A stainless steel roller chain fitted with 33 copper sleeves (shrouds) carries foils, one per shroud, down a dee stem to the midplane. A 12-bit absolute optical shaft encoder senses foil position. To replace a foil a shroud is positioned at the top of the cyclotron, a foil is removed, and another is transferred from the magazine to the empty shroud. Three stepping motors and associated electronics provide mechanical drive and are interfaced with a CAMAC control system.
First operation of the Chalk River superconducting cyclotron
Abstract Successful development of the first beam from the Chalk River superconducting cyclotron has verified the design and construction of all elements of the cyclotron.
Semi-Automatic Prodedures for Matching the Emittance of the Injected Beam to the Chilk River Superconducting Cyclotron
A system of programs and procedures has been developed that allows efficient matching of the MP Tandem beam to the superconducting cyclotron. The Chalk River Tandem AcceleratorSuperconducting Cyclotron project (TASCC) consists of a 13 MV tandem injecting into a K=520 (MeV A/Q/sup 2/) superconducting cyclotron. In order to minimize the radial and axial betatron amplitudes in the cyclotron, and to maximize the quality of the extracted beam, precise 6-dimensional emittance matching to the cyclotron is required. This paper deals with semi-automatic procedures for matching the emittance of the beam to the continuously variable optical properties of the cyclotron in order to meet its rather stringent yet variable acceptance phase space.