Abstracts Brochure - CERN

WEPLS004
WEPLS005
WEPLS006
28-Jun-06 16:00 - 18:00 WEPLS — Poster Session
Calculation of Emittance Change in the MICE Cooling Channel
C.T. Rogers (Imperial College of Science and Technology, Department
of Physics)
332
In the Muon Ionisation Cooling Experiment
(MICE), muons are passed through one or
two cells of a linear cooling channel one by
one. Normalised emittance is reduced by
passing particles through liquid hydrogen absorbers where the momentum is reduced. Longitudinal momentum is
replaced by RF cavities. In order to measure the emittance to a precision sufficient to predict the performance of many
cells that would be present in a Neutrino Factory, an exquisite measurement is required. The phase space coordinates
of the muons are measured before and after the channel using a pair of spectrometers and time-of-flight counters
(TOFs). Pion and electron rejection is achieved by Particle Identification detectors. In this paper we detail the origin
of the errors in the measurement and examine techniques for offline bunch reconstruction and the removal of the
detector errors.
The MICE Target Mechanism
C.N. Booth, L.C. Howlett, P.J. Smith (Sheffield University) N.
Schofield (University of Manchester, School of Electrical and Electronic
Engineering)
The MICE experiment requires a beam of low
energy muons to test muon cooling. This
beam will be derived parasitically from the
ISIS accelerator. A novel target mechanism
is being developed which will allow the in-
sertion of a small titanium target into the proton beam halo on demand. The target must remain outside the beam
envelope during acceleration, and then overtake the shrinking beam envelope to enter up to 5 mm into the beam
during the last 2 ms before extraction. The technical specifications are demanding, requiring large accelerations and
precise and reproducible location of the target each cycle. The mechanism must operate in a high radiation environment,
and the moving parts must be compatible with the stringent requirements of the accelerator’s vacuum system.
A prototype linear electromagnetic drive has been built, and the performance is being measured and improved to
meet the design specifications. Details of the drive, position readout and control systems will be presented, together
with the performance achieved to date.
Experimental Requirements for the Design of Future Accelerator-based Neutrino Facilities
Classification: 1-A18, 3-A09, 4-A15, 6-T03
A.P. Blondel (DPNC)
(non exhaustive). The study of neutrino oscillations
offers promises of great discoveries
including leptonic CP violation. The experimental programs that are under discussion pose considerable challenges
to accelerator builders. Extremely high intensities are needed for classical on- and off-axis pion decay beams; novel
ideas such as beta-beams and muon decay beams have been invented and are being studied. The experiments to be
performed require outstanding predictability and monitoring of the neutrino flux. The challenges will be reviewed
and a list of requirements will be proposed.