IPAC2015 - List of Authors (Hanson, G.G.)

Paper	Title	Page
TUPWI040	End-to-End Simulation of Bunch Merging for a Muon Collider	2336
	Y. Bao, G.G. Hanson UCR, Riverside, California, USA R.B. Palmer, D. Stratakis BNL, Upton, Long Island, New York, USA
	Muon accelerator beams are commonly produced indirectly through pion decay by interaction of a charged particle beam with a target. Efficient muon capture requires the muons to be first phase-rotated by rf cavities into a train of 21 bunches with much reduced energy spread. Since luminosity is proportional to the square of the number of muons per bunch, it is crucial for a Muon Collider to use relatively few bunches with many muons per bunch. In this paper we will describe a bunch merging scheme that should achieve this goal. We present for the first time a complete end-to-end simulation of a 6D bunch merger for a Muon Collider. The 21 bunches arising from the phase-rotator, after some initial cooling, are merged in longitudinal phase space into 7 bunches, which then go through 7 paths with different lengths and reach at the final collecting ”funnel” at the same time. The final single bunch has a transverse and a longitudinal emittance that matches well with the subsequent 6D rectilinear cooling scheme.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWI040
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WEPJE016	INTENSE MUON BEAMS FROM THE CSNS SPALLATION TARGET	2708
	Y. Bao, G.G. Hanson UCR, Riverside, California, USA
	Intense muon beams are useful for a wide range of physics experiments. Currently most of the muon beams are produced by protons hitting thin targets sitting upstream of spallation neutron targets. The intensity of the muons is greatly limited by the small thickness of the muon targets, which are intended to have minimum impact on the proton beams. When the majority of the proton beam hits the spallation target, a large number of pions/muons are produced. After being captured in a solenoidal magnetic field, a high intensity muon beam can be produced. In this paper we take the Chinese Spallation Neutron Source (CSNS) target as an example and investigate the production of high intensity muon beams. Two possibilities are presented in this paper: an upstream collection of surface muons and a downstream collection of pions which is followed by a decay and compress channel to obtain a high intensity muon beam. Simulations show both methods can reach high intensities which could significantly increase the statistics of many experiments.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPJE016
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

End-to-End Simulation of Bunch Merging for a Muon Collider

2336

Y. Bao, G.G. Hanson
UCR, Riverside, California, USA
R.B. Palmer, D. Stratakis
BNL, Upton, Long Island, New York, USA

Muon accelerator beams are commonly produced indirectly through pion decay by interaction of a charged particle beam with a target. Efficient muon capture requires the muons to be first phase-rotated by rf cavities into a train of 21 bunches with much reduced energy spread. Since luminosity is proportional to the square of the number of muons per bunch, it is crucial for a Muon Collider to use relatively few bunches with many muons per bunch. In this paper we will describe a bunch merging scheme that should achieve this goal. We present for the first time a complete end-to-end simulation of a 6D bunch merger for a Muon Collider. The 21 bunches arising from the phase-rotator, after some initial cooling, are merged in longitudinal phase space into 7 bunches, which then go through 7 paths with different lengths and reach at the final collecting ”funnel” at the same time. The final single bunch has a transverse and a longitudinal emittance that matches well with the subsequent 6D rectilinear cooling scheme.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWI040

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPJE016

INTENSE MUON BEAMS FROM THE CSNS SPALLATION TARGET

2708

Y. Bao, G.G. Hanson
UCR, Riverside, California, USA

Intense muon beams are useful for a wide range of physics experiments. Currently most of the muon beams are produced by protons hitting thin targets sitting upstream of spallation neutron targets. The intensity of the muons is greatly limited by the small thickness of the muon targets, which are intended to have minimum impact on the proton beams. When the majority of the proton beam hits the spallation target, a large number of pions/muons are produced. After being captured in a solenoidal magnetic field, a high intensity muon beam can be produced. In this paper we take the Chinese Spallation Neutron Source (CSNS) target as an example and investigate the production of high intensity muon beams. Two possibilities are presented in this paper: an upstream collection of surface muons and a downstream collection of pions which is followed by a decay and compress channel to obtain a high intensity muon beam. Simulations show both methods can reach high intensities which could significantly increase the statistics of many experiments.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPJE016

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)