Accession Number : AD0781018

Title :   Fast Retrace of Particle Orbits Through a Large Inhomogeneous Magnetic Field,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF PHYSICS

Personal Author(s) : McKee,R. J.

Report Date : 08 JUN 1973

Pagination or Media Count : 7

Abstract : A fast method of retracing orbits through a large, inhomogeneous magnetic field has been developed for applications in particle-physics experiments. The momenta of particles are found by simple linear interpolation in a mesh of previously calculated representative orbits. The essential feature of the scheme is to perform a transformation on the set of observables defining the orbit before doing the interpolation. This is done to reduce both interpolation errors and the required number of mesh points. A detailed development of the method is presented for an actual apparatus. For this apparatus particles were retraced in 0.6 ms/orbit using a CDC 6600 computer, and for 100 mesh points interpolation errors were found to be smaller than experimental errors by more than an order of magnitude. (Author)

Descriptors :   *Particle trajectories, *Magnetic fields, Interpolation, Transformations(Mathematics), Computer applications, Canada

Subject Categories : Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE