Speaker
Description
The design of the high-energy acceleration chain for the muon collider currently incorporates four rapid cycling synchrotrons (RCS). Because of the short muon lifetime, fast acceleration is vital, requiring injection and extraction at a non-zero ramp rate. This continuous acceleration inevitably produces a mismatch in the longitudinal phase space at each transfer. By optimising the synchronous phase for each RCS, the mismatch can be minimised, which is essential for preserving beam intensity and quality up to the collider. This contribution presents an optimisation study of the transfer scheme and evaluates its impact on longitudinal emittance preservation. The loss function for the optimisation is derived from beam dynamics simulations using the code BLonD. The scheme is found to significantly reduce emittance growth compared to the nominal synchronous phase both with and without including intensity effects such as induced voltages.
Funding Agency
This work is endorsed by the IMCC.
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