From Fermilab: “A step closer to demonstrating muon ionization cooling”


Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

Wednesday, Oct. 23, 2013
Mark Palmer

This month, scientists of the Muon Accelerator Program celebrated the arrival of a U.S.-supplied magnet and six tons of RF hardware at the Muon Ionization Cooling Experiment (MICE), located at Rutherford Appleton Laboratory in the UK. The experiment’s goal is to demonstrate the feasibility of shrinking the size of a muon beam with a process called ionization cooling. Creating compact muon beams is a crucial step toward future muon accelerators and [muon] colliders*.

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Alan Bross works in the MuCool Test Area

In ionization cooling, muons are cooled by sending them through absorber materials made of light nuclei (such as hydrogen) and then are reaccelerated using RF cavities. This process can be repeated many times and reduces the transverse momentum of each muon relative to its longitudinal momentum.

In 2015, MICE scientists will begin key experiments that will characterize the interactions of muon beams with various absorbers. The muon trajectories will be carefully measured using scintillating fiber tracking detectors embedded in spectrometer solenoid magnets located at the beginning and end of the cooling beamline. A subsequent experimental configuration, expected to be in operation later in the decade, will employ a full “cooling cell” with suitable absorbers, focusing solenoid magnets and multiple RF cavities to characterize the evolution of the beam’s emittance as the beam travels through a whole sequence of devices.

In support of these R&D efforts, the DOE-funded U.S. Muon Accelerator Program is providing two spectrometer solenoid magnets and two coupling coil magnets, as well as RF and detector hardware for the experiment. The NSF has provided additional support for U.S. participation in the experiment.

*A.K.A. “Higgs factories”

See the full article here.

Fermilab Campus

Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics.


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