2011 Particle Accelerator Conference - List of Authors (Caldwell, A.)

Paper

Title

Page

A Sphere Cooler Scheme for Muon Cooling

139

Y. Bao
MPI, Muenchen, Germany
A. Caldwell, D. Greenwald
MPI-P, München, Germany

Muon cooling is the greatest obstacle for producing an intensive muon beam. The frictional cooling method holds promise for delivering low-energy muon beams with narrow energy spreads. We outline a sphere cooler scheme based on frictional cooling to effectively produce such a “cold” muon beam. As an example source, we take the parameters of a surface muon source available at the Paul Scherrer Institute. Simulation results show that the sphere cooler has an efficiency of 50% to produce a “cold” muon beam with an energy spread of 0.9 keV. The high quality beam can potentially meet the requirements of a neutrino factory or a muon collider.

MOP018

The Impact of Beam Emittance on BSM-Physics Discovery Potential at a Muon Collider

142

D. Greenwald, A. Caldwell
MPI-P, München, Germany

A muon collider would allow for high precision probing of the multi-TeV energy regime and the potential discovery of new physics. Background radiation from electrons from the decay of muons interacting with the beam pipes near the interaction point (IP) places limitations on the design of a muon-collider detector. In particular, conical shielding extending out from the IP along the outside of the beam pipes prevents detection of particles at small angles to the beam line. For a given luminosity, bunches with smaller emittances will have fewer muons and therefore smaller background levels, allowing for shielding with shallower angles. The angular-acceptance dependence of the discovery potential for Kaluza-Klein excitations of the standard model particles is presented as a motivation for improved beam-cooling techniques that can achieve high luminosities with small bunch populations.

MOP108

Simulation Study of Proton-Driven PWFA Based on CERN SPS Beam

301

G.X. Xia, A. Caldwell
MPI-P, München, Germany
C. Huang
LANL, Los Alamos, New Mexico, USA
W.B. Mori
UCLA, Los Angeles, California, USA

We have proposed an experimental study of the proton-driven plasma wakefield acceleration by using proton beam from the CERN SPS. In this paper, the particle-in-cell (PIC) simulation of the SPS beam-driven plasma wakefield acceleration is introduced. By varying the beam parameters and plasma parameters, simulation shows that electric fields in excess of 1 GeV/m can be achieved.

TUOBN5

A Proposed Experimental Test of Proton-Driven Plasma Wakefield Acceleration Based on CERN SPS

718

G.X. Xia, A. Caldwell
MPI-P, München, Germany
W. An, C. Joshi, W. Lu, W.B. Mori
UCLA, Los Angeles, California, USA
R.W. Assmann, F. Zimmermann
CERN, Geneva, Switzerland
R.A. Fonseca, N.C. Lopes, J. Vieira
Instituto Superior Tecnico, Lisbon, Portugal
C. Huang
LANL, Los Alamos, New Mexico, USA
K.V. Lotov
BINP SB RAS, Novosibirsk, Russia
P. Muggli
USC, Los Angeles, California, USA
A.M. Pukhov
HHUD, Dusseldorf, Germany
L.O. Silva
IPFN, Lisbon, Portugal

Proton-driven plasma wakefield acceleration (PDPWA) has been proposed as an approach to accelerate electron beam to TeV energy regime in a single passage of plasma channel. An experimental test is recently proposed to demonstrate the capability of PDPWA by using proton beams from the CERN SPS. The preparation of experiment is introduced. The particle-in-cell simulation results based on realistic beam parameters are presented.

Slides TUOBN5 [2.208 MB]

Paper	Title	Page
MOP017	A Sphere Cooler Scheme for Muon Cooling	139
	Y. Bao MPI, Muenchen, Germany A. Caldwell, D. Greenwald MPI-P, München, Germany
	Muon cooling is the greatest obstacle for producing an intensive muon beam. The frictional cooling method holds promise for delivering low-energy muon beams with narrow energy spreads. We outline a sphere cooler scheme based on frictional cooling to effectively produce such a “cold” muon beam. As an example source, we take the parameters of a surface muon source available at the Paul Scherrer Institute. Simulation results show that the sphere cooler has an efficiency of 50% to produce a “cold” muon beam with an energy spread of 0.9 keV. The high quality beam can potentially meet the requirements of a neutrino factory or a muon collider.

MOP018	The Impact of Beam Emittance on BSM-Physics Discovery Potential at a Muon Collider	142
	D. Greenwald, A. Caldwell MPI-P, München, Germany
	A muon collider would allow for high precision probing of the multi-TeV energy regime and the potential discovery of new physics. Background radiation from electrons from the decay of muons interacting with the beam pipes near the interaction point (IP) places limitations on the design of a muon-collider detector. In particular, conical shielding extending out from the IP along the outside of the beam pipes prevents detection of particles at small angles to the beam line. For a given luminosity, bunches with smaller emittances will have fewer muons and therefore smaller background levels, allowing for shielding with shallower angles. The angular-acceptance dependence of the discovery potential for Kaluza-Klein excitations of the standard model particles is presented as a motivation for improved beam-cooling techniques that can achieve high luminosities with small bunch populations.

MOP108	Simulation Study of Proton-Driven PWFA Based on CERN SPS Beam	301
	G.X. Xia, A. Caldwell MPI-P, München, Germany C. Huang LANL, Los Alamos, New Mexico, USA W.B. Mori UCLA, Los Angeles, California, USA
	We have proposed an experimental study of the proton-driven plasma wakefield acceleration by using proton beam from the CERN SPS. In this paper, the particle-in-cell (PIC) simulation of the SPS beam-driven plasma wakefield acceleration is introduced. By varying the beam parameters and plasma parameters, simulation shows that electric fields in excess of 1 GeV/m can be achieved.

TUOBN5	A Proposed Experimental Test of Proton-Driven Plasma Wakefield Acceleration Based on CERN SPS	718
	G.X. Xia, A. Caldwell MPI-P, München, Germany W. An, C. Joshi, W. Lu, W.B. Mori UCLA, Los Angeles, California, USA R.W. Assmann, F. Zimmermann CERN, Geneva, Switzerland R.A. Fonseca, N.C. Lopes, J. Vieira Instituto Superior Tecnico, Lisbon, Portugal C. Huang LANL, Los Alamos, New Mexico, USA K.V. Lotov BINP SB RAS, Novosibirsk, Russia P. Muggli USC, Los Angeles, California, USA A.M. Pukhov HHUD, Dusseldorf, Germany L.O. Silva IPFN, Lisbon, Portugal
	Proton-driven plasma wakefield acceleration (PDPWA) has been proposed as an approach to accelerate electron beam to TeV energy regime in a single passage of plasma channel. An experimental test is recently proposed to demonstrate the capability of PDPWA by using proton beams from the CERN SPS. The preparation of experiment is introduced. The particle-in-cell simulation results based on realistic beam parameters are presented.
	Slides TUOBN5 [2.208 MB]