Reaching muon collider target emittances by ionization cooling · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title
Reaching muon collider target emittances by ionization cooling
Plain
Muons must be squeezed in phase space by a factor of about a million within microseconds, by passing them through absorbers and re-accelerating them; the full chain has never been built.
Precise · changed · core
Revision 1: Transverse ionization cooling of muons through a single absorber was demonstrated by MICE (published 2020). Determine whether a realistic 6D cooling channel plus final cooling stage can reach normalized transverse emittance of approximately 2.5e-3 cm and longitudinal emittance of approximately $7\,\mathrm{cm}$ with overall muon transmission above $\sim 10$ percent, including RF limits in solenoid fields, absorber heating, space charge and muon decay.
Revision 2: Transverse ionization cooling of muons through a single absorber was demonstrated by MICE (published 2020). Determine whether a realistic 6D cooling channel plus final cooling stage can reach normalized transverse emittance of approximately $2.5 \times 10^{-3}$ cm and longitudinal emittance of approximately $7\,\mathrm{cm}$ with overall muon transmission above $\sim 10$ percent, including RF limits in solenoid fields, absorber heating, space charge and muon decay.
Settled by
An end-to-end simulation with engineering-feasible fields and gradients reaching both emittances, confirmed by a 6D cooling demonstrator for the first stages.
Kind
well-posed
Answer type
yes-no
References
(empty)
Literature status
open
Status note
(empty)
Posed since
(empty)

Decisions