David Neuffer

A practical high-energy high-luminosity mu+ mu- collider

We present a candidate design for a high-energy high-luminosity {mu}{sup +}-{mu}{sup -} collider, with {ital E}{sub cm}=4 TeV, {ital L}=3{times}10{sup 34} cm{sup -2}s{sup -1}, using only existing technology. The design uses a rapid-cycling medium-energy proton synchrotron, which produces proton beam pulses which are focused onto two {pi}-producing targets, with two {pi}-decay transport lines producing {mu}{sup +}{close_quote}s and {mu}{sup -}{close_quote}s. The {mu}{close_quote}s are collected, rf-rotated, cooled and compressed into a recirculating linac for acceleration, and then transferred into a storage ring collider. The keys to high luminosity are maximal {mu} collection and cooling; innovations with these goals are presented, and future plans for collider development are discussed. This example demonstrates a novel high-energy collider type, which will permit exploration of elementary particle physics at energy frontiers beyond the reach of currently existing and proposed electron and hadron colliders. {copyright} 1995 {ital American Institute of Physics}.

High-energy high-luminosity µ+ µ- collider design

We discuss the design of a high luminosity (10/sup 35/ cm/sup -2/ s/sup -1/), high energy (2+2 TeV) /spl mu/+/spl mu//sup -/ collider, starting from the proton accelerator needed to generate the muon beams and proceeding through the muon storage ring.We discuss the design of a high luminosity (1035 cm-2 s-1), high energy (2 + 2 TeV) µ+µ- collider, starting from the proton accelerator needed to generate the muon beams and proceeding through the muon storage ring.

Scheme for Ionization Cooling for a Muon Collider

We discuss a complete scheme for production and cooling a muo n beam for three specified Muon Colliders. We outline the parameters for these Muon Collide rs. The scheme starts with the front end of a proposed Neutrino Factory that yields bunch tr ains of both muon signs. Emittance exchange cooling in upward or downward broad helical lattic es reduces the longitudinal emittance until it becomes possible to merge the trains into single bun ches: one of each sign. Further cooling in all dimensions is applied to the single bunches in further upward climbing helical lattices. Final transverse cooling to the required parameters is achi eved in 50 T solenoids that use high temperature superconductor. Preliminary simulations of e ach element are presented. We discuss known challenges.

A possible ionization cooling experiment at the AGS

Ionization cooling may play an important role in reducing the phase space volume of muons for a future muon‐muon collider. We describe possible transverse and longitudinal emittance cooling experiments that utilize the capabilities of the AGS at Brookhaven National Laboratory.

Targets and Magnetic Elements for Pion Collection in Muon Collider Drivers

We review quasi‐achromatic magnetic focussing elements which collect pions produced in a target for transport into a π→μ decay channel, with features appropriate to the development of high energy muon colliders. We discuss how the collection and target requirements of a muon collider are different from and similar to existing secondary particle collection systems. We briefly discuss target technology issues.

Progress toward a high‐energy, high‐luminosity μ+‐μ− collider

In the past two years, considerable progress has been made in development of the μ+‐μ− collider concept. This collider concept could permit exploration of elementary particle physics at energy frontiers beyond the reach of currently existing and proposed electron and hadron colliders. As a bench‐mark prototype, we present a candidate design for a high‐energy high‐luminosity μ+‐μ− collider, with Ecm=4 TeV, L=3×1034 cm−2s−1, based on existing technical capabilities. The design uses a rapid‐cycling medium‐energy proton synchrotron, producing proton beam pulses which are focused onto two π‐producing targets, with two π‐decay transport lines producing μ+’s and μ−’s. The μ’s are collected, rf‐rotated, cooled and compressed into a recirculating linac for acceleration, and then transferred into a storage ring collider. The keys to high luminosity are maximal μ collection and cooling, and innovations with these goals are presented. Possible variations and improvements are discussed. Recent progress in collider con...