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Neutrino Factory/Muon Collider Document 543-v1

Open Cavity Cooling Lattice for the Muon Collider

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Document type:
Technical Note
Submitted by:
Pavel V Snopok
Updated by:
Pavel V Snopok
Document Created:
05 Oct 2009, 15:00
Contents Revised:
05 Oct 2009, 15:00
Metadata Revised:
05 Oct 2009, 15:00
Actually Revised:
28 Oct 2009, 15:09
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The RFOFO ring and its derivative Guggenheim helix are the two efficient lattices for the initial stage of cooling in the Muon Collider. However, they have a certain disadvantage, namely, the RF cavities operate in a strong magnetic field. R\&D results to date suggest that this may cause breakdown of cavities before reaching desired RF gradients. The open cavity lattice studied in detail in this article attempts to address this problem by moving the magnetic coils into the irises of the RF cavities and shaping the cavities in such a way that the magnetic field lines are parallel to the walls. In such a layout the electrons do not gain enough energy to damage the walls, thus allowing the design gradients to be reached.
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