TRIUMF Symposium on FFAGs, 14th April 2004

The symposium will present the accelerator physics of Fixed Field Alternating Gradient (FFAG) rings at an introductory level as preparatory material for their application to particle physics experiments with muons.

1:30 pm "Introduction to scaling FFAGs"
Yoshi Mori, KEK

This talk will cover the basics of classical FFAGs: why these machines must have reverse bends in addition to normal bends, what is meant by "scaling" - the geometrical similarity of orbits at different momenta and the constancy of the betatron tunes - and what are the differences between "radial sector" and "spiral sector" machines. FFAG R&D activities in Japan will be discussed briefly.

2:00 pm "Physics Potentials of a Muon Factory and a Neutrino Factory based on FFAG"
Yoshitaka Kuno, Osaka University

FFAG will open unique opportunity to consider muon and neutrino factories, where we can expect to have respectively muon and neutrino beams with high intensity and high quality. Regarding a muon factory, the PRISM (Phase Rotated Intense Slow Muon source) based on FFAG would offer the highest brightness muon beams in the world. It allows experimental searches for lepton flavor violating muon-electron conversion and also for CP-violating electric dipole moment of the muon. Further muon acceleration to higher energy with FFAG would offer a high intensity neutrino beam from muon decays. It is a neutrino factory, where CP violation in the lepton sector can be searched for. In my talk, physics motivation of muon and neutrino factories is presented with emphasis of FFAG. Also possible scenario at J-PARC is briefly mentioned.
3:00-3:15 break

3:15 pm "FFAGs as components of a Neutrino Factory or Muon Collider"
Carol Johnstone, FNAL

Neutrino oscillation experiments and neutrino and collider physics in general would benefit both from enhanced signal and background control with a well-collimated, intense neutrino beam generated from the decay of intense, stored muon beams, as proposed in the context of a Muon Collider and Neutrino Factory. This work explores the concept and technical challenges of both machines, with detailed attention to the Neutrino Factory which serves as a test of the principles underlying the more advanced Muon Collider. Beam cooling, large-acceptance lattices, and tranverse motion will be presented at an introductory level. In particular, this talk introduces the new, fixed field, acceleration techniques needed for rapid, large-emittance muon acceleration, with special emphasis on a new "non-scaling" FFAG approach uniquely adaptive to muon acceleration.

4:00 pm "Bucketless acceleration in nonscaling FFAGs and sketch of 10 GeV muon and 10 MeV electron rings"
Shane Koscielniak, TRIUMF

In conventional machines, path length is related linearly to momentum; and this allows acceleration inside RF buckets. In non-scaling FFAGs a new form of acceleration is permitted that does not rely on buckets; this will be explained in the context of a 10-20 GeV muon ring. It is proposed to demonstrate this bucketless acceleration in a 10-20 MeV electron model, and some parameters of this ring will be presented.
Symposium ends approx 4:30 pm.
last modified:13 April, 2004