1
|
Abstract : The international Muon Ionization Cooling Experiment (MICE), site
|
2
|
d at Rutherford Appleton Laboratory in the UK, aims to build and test one ce
|
3
|
ll of a a realistic ionization cooling channel lattice. This comprises three
|
4
|
Absorber-Focus-Coil (AFC) modules and two RF-Coupling-Coil (RFCC) modules.
|
5
|
Both are technically challenging.
|
6
|
The Focus Coils are dual-coil superconducting solenoids, in close proximity,
|
7
|
wound on a common mandrel. Each pair of coils is run in series, but can be
|
8
|
configured with the coil polarities in the same (solenoid mode) or opposite
|
9
|
(gradient mode). At the center of each FC there is a 20-L liquid-hydrogen ab
|
10
|
sorber, operating at about 14 K, to serve as the energy loss medium for the
|
11
|
ionization cooling process.
|
12
|
The longitudinal beam momentum is restored in the RFCC modules, each of whic
|
13
|
h houses four 201.25-MHz RF cavities whose irises are closed with 42-cm diam
|
14
|
eter thin Be windows. To contain the muon beam, each RFCC module also has a
|
15
|
1.4-m diameter superconducting coupling solenoid surrounding the cavities. B
|
16
|
oth types of magnet are cooled with multiple 2-stage cryo-coolers, each deli
|
17
|
vering 1.5 W of cooling at 4 K.
|
18
|
Designs for all components are complete and fabrication is under way. Descri
|
19
|
ptions of
|
20
|
the various components, design requirements, and construction status will be
|
21
|
described.
|