Title: Progress towards completion of the MICE demonstration of

   ionisation cooling of muons

Abstract content

The Muon Ionisation Cooling Experiment (MICE) based at the Rutherford

Appleton Laboratory aims to demonstrate 10%

ionisation cooling of a beam of muons by its interaction with low Z

absorber materials followed by restoration of

longitudinal momentum in RF linacs.

Extensions to the apparatus required to achieve STEP IV, including the

first absorber cell, of either liquid hydrogen or

lithium hydride, sandwiched between two particle tracking spectrometers

shall be described. Two very large

superconducting spectrometer solenoids (the first of which has just

completed acceptance trials) and one focus coil

solenoid (currently under test), manufactured in the US and UK

respectively, will provide a magnetic field of ~ 4T in the

volume of the two trackers and the absorber cell. The development,

testing and integration of these challenging

components will be reported.

Progress towards STEPs V & VI including the 8 RF cavities to provide the

required 8MV/m gradient in a strong magnetic

field will be presented, including the RF drive system to deliver 2MW,

1ms pulses of 201MHz frequency at a PRF of 1Hz,

the distribution network to deliver 1MW to each cavity with correct RF

phasing, diagnostics to determine the gradient and

transit phase of the muons and the development of the very large

diameter magnets required for the linacs.