PAC2013 - List of Authors (Grote, D.P.)

Paper	Title	Page
THPHO13	Space-Charge Limitations on the Final Stages of a Muon Collider Cooling Channel	1331
	D. Stratakis, J.S. Berg, R.B. Palmer BNL, Upton, Long Island, New York, USA D.P. Grote LLNL, Livermore, California, USA
	Funding: This work is funded by US Dept. of Energy grant numbers DE AC02-98CH10886. Muon Colliders use ionization cooling to reduce the emittance of the muon beam prior to acceleration. A Muon Collider requires the normalized longitudinal emittance to be less than 2 mm while the normalized transverse emittance is a few hundred μm. At the last stages of the cooling channel, the bunch has 4×10¹² muons, an average momentum of 200 MeV/c, and an rms bunch of 2 cm. With this beam intensity and relatively low momentum, we expect space charge effects to have a significant impact on beam dynamics. Currently, codes that could study both space-charge and particle-matter-interaction are limited. Here, with the aid of the particle-in-cell code Warp, a model is developed to examine space-charge for muon cooling lattices and some recent results are presented. Space-charge compensation solutions are discussed and the minimum cooling emittance as a function of the beam charge is identified.

Paper

Title

Page

Space-Charge Limitations on the Final Stages of a Muon Collider Cooling Channel

1331

D. Stratakis, J.S. Berg, R.B. Palmer
BNL, Upton, Long Island, New York, USA
D.P. Grote
LLNL, Livermore, California, USA

Funding: This work is funded by US Dept. of Energy grant numbers DE AC02-98CH10886.
Muon Colliders use ionization cooling to reduce the emittance of the muon beam prior to acceleration. A Muon Collider requires the normalized longitudinal emittance to be less than 2 mm while the normalized transverse emittance is a few hundred μm. At the last stages of the cooling channel, the bunch has 4×10¹² muons, an average momentum of 200 MeV/c, and an rms bunch of 2 cm. With this beam intensity and relatively low momentum, we expect space charge effects to have a significant impact on beam dynamics. Currently, codes that could study both space-charge and particle-matter-interaction are limited. Here, with the aid of the particle-in-cell code Warp, a model is developed to examine space-charge for muon cooling lattices and some recent results are presented. Space-charge compensation solutions are discussed and the minimum cooling emittance as a function of the beam charge is identified.