16
Ionization Cooling Using
Dr. Rolland
Dr. Rolland
DOE Grant No. DE-FG02-04ER84016
Amount: $650,000
Muon collider luminosity
depends on the number of muons in the storage ring and on the transverse size
of the beams in collision. As presently
envisioned, large muon intensities will be required, due to limitations with
ionization cooling, the intended method for cooling the beam. However, the proton accelerators needed to
produce the required muon intensity are expensive, and the decay of the large
number of muons in the storage ring create troublesome boundary radiation and
make the physics experiments difficult. This project will combine ionization cooling
with parametric resonances to produce beams with much smaller tranverse sizes,
allowing high muon collider luminosity to be achieved with fewer muons. In Phase I, the theory of transverse beam
cooling, using half-integer parametric resonances and ionization cooling, was
extended to include methods to compensate for chromatic and angular
aberrations. Computer programs were
developed which were used to confirm the general analytical predictions and to
compare the relative effectiveness of a quadrupole channel to one based on
solenoids with alternating polarity.
Phase II will further develop the theory and simulations in order to demonstrate
that transverse cooling using parameteric resonances can relax the requirements
on the proton driver, reduce the boundary radiation, and provide a better
environment for experiments at muon
colliders. Complete simulations using
realistic models of all components of the parametric resonance cooling channel
will be conducted.
Commercial
Applications and Other Benefits as described by the awardee: If the case
for a muon collider as the next energy frontier machine can be made compelling,
it becomes a candidate to be added to the other options for the High Energy