A New Structure for the NLC Positron Predamping Ring Lattice
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چکیده
The NLC positron source is specified to produce a beam of normalized edge emittance 30,000 mm-mrad. It is not practicable, using a single damping ring, to damp this emittance to meet the specification for injection into the main linac, so a pre-damping ring is used to reduce the emittance to a value at least as small as that of the electron beam from the source. In this note, we describe the design of a pre-damping ring based on a double-bend achromatic structure, as opposed to the previously investigated theoretical minimum emittance cell. The lattice meets the specifications for damping and has close to the required acceptance, and has advantages over previous lattices, in terms of component specifications and design flexibility. CBP Tech Note-233 LCC-0066 A New Structure for the NLC Positron Pre-Damping Ring Lattice Andrzej Wolski Lawrence Berkeley National Laboratory
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تاریخ انتشار 2001