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Neutrino Factory/Muon Collider Document 39-v1

An Emittance Diagnostic Channel for R&D on the Front End of a Muon Collider/Neutrino Factory

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MuCool Note
Submitted by:
John Urish
Updated by:
John Urish
Document Created:
10 Aug 1999, 12:00
Contents Revised:
10 Aug 1999, 12:00
Metadata Revised:
10 Aug 1999, 12:00
Actually Revised:
14 Sep 2006, 13:35
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07 Nov 2010, 15:23
Using the analytic estimates developed for the emittance diagnostic channel for
the final-stage cooling experiment, we conclude that diagnostics for both
an initial-stage cooling experiment, and for the targetry experiment could
be performed with a bent solenoid of 1.25~T field strength. The solenoid
bore would need to be at least 40~cm for either study.
The targetry study is less demanding in accuracy of momentum analysis, and
could be accomplished with a smaller bend angle to the solenoid, 0.1 rad,
compared to 0.25 rad as appears more appropriate for an initial cooling
study. The small bend angle permits a relatively large bend radius, which
in turn implies that a relatively weak guiding dipole field will suffice.
That guiding dipole field could be provided by tilting the coils in the
bend region, which would commit the system to a single central momentum.
The cost of such magnet systems is estimated to be less \$1M per bend,
including the straight sections needed for field
uniformity over the TPC's. The cost of the magnets is about half that for a
diagnostic channel of final-stage cooling.
Some brief remarks about instrumentation are given.

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Kirk T. McDonald
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