PAC2013 - List of Authors (Neuffer, D.V.)

Paper	Title	Page
MOPMA21	An Optimization Study of the Target Subsystem for the New g-2 Experiment	345
	C.Y. Yoshikawa, C.M. Ankenbrandt Muons, Inc, Illinois, USA A.F. Leveling, N.V. Mokhov, J.P. Morgan, D.V. Neuffer, S.I. Striganov Fermilab, Batavia, USA
	Funding: Work supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy A precision measurement of the muon anomalous magnetic moment, aμ = (g-2)/2, was previously performed at BNL with a result of 2.2 - 2.7 standard deviations above the Standard Model (SM) theoretical calculations. The same experimental apparatus is being planned to run in the new Muon Campus at Fermilab, where the muon beam is expected to have less pion contamination and the extended dataset may provide a possible 7.5σ deviation from the SM, creating a sensitive and complementary benchmark for proposed SM extensions. We report here on a study performed on the target subsystem utilizing a new optimization technique that overcomes complexities of asymmetric particle production and depth of focus of a Li lens. This new technique is applied to an apparatus that is optimized for pions that have favourable phase space to create polarized daughter muons around the magic momentum of 3.094 GeV/c, which is needed by the downstream g 2 muon ring.

TUPBA11	TOWARDS A GLOBAL OPTIMIZATION OF THE MUON ACCELERATOR FRONT END	547
	H. K. Sayed, J.S. Berg, H.G. Kirk, R.B. Palmer, D. Stratakis BNL, Upton, Long Island, New York, USA K.T. McDonald PU, Princeton, New Jersey, USA D.V. Neuffer Fermilab, Batavia, USA J. Qiang, R.D. Ryne LBNL, Berkeley, California, USA
	The baseline design for the neutrino factory and muon collider front end consists of a five major components, namely the muon production target, decay channel, buncher, phase rotator, and the ionization cooling channel. Although each of the mentioned systems has a complex design which is optimized for the best performance with its own set of local objectives, the integration of all of them into one system requires a global optimization to insure the effectiveness of the local objectives and overall performance. This global optimization represents a highly constrained multi-objective optimization problem. The objectives aimed for are the number of muons captured into a stable bunches and their transverse and longitudinal emittances. These objectives are constrained by the momentum and dynamic acceptance of the subsequent acceleration systems in addition to the overall cost. A multi-objective global evolutionary algorithm is employed to address such a challenge. In this study a statement of optimization strategy is discussed along with preliminary results of the optimization.

TUPBA18	nuSTORM Pion Beamline Design Update	562
	A. Liu, A.D. Bross, D.V. Neuffer Fermilab, Batavia, USA S.-Y. Lee Indiana University, Bloomington, Indiana, USA
	A facility producing neutrinos from muons that decay in a racetrack ring can provide extremely well understood neutrino beams for oscillation physics and the search for sterile neutrinos. The ‘‘neutrinos from STORed Muons"(nuSTORM) facility based on this idea has been introduced by Bross, Neuffer et al. The design of the nuSTORM facility and the particle tracking have been presented in the paper of Liu, et al. This paper demonstrates the recent optimization results of the pion beamline, with G4beamline simulations. The optimum choice of pion beam center momentum, a new algorithm on fitting bivariate Gaussian distribution to the pion phase space data at the downstream side of the horn, and the comparison of the beamline performance with the optics designed based on Graphite and Inconel targets are also described.

TUPBA20	A Staged Muon-based Facility to Enable Intensity and Energy Frontier Science in the US	565
	J.-P. Delahaye SLAC, Menlo Park, California, USA C.M. Ankenbrandt Muons, Inc, Illinois, USA C.M. Ankenbrandt, S. Brice, A.D. Bross, D.S. Denisov, E. Eichten, R.J. Lipton, D.V. Neuffer, M.A. Palmer, P. Snopok Fermilab, Batavia, USA S.A. Bogacz JLAB, Newport News, Virginia, USA P. Huber Virginia Polytechnic Institute and State University, Blacksburg, USA D.M. Kaplan, P. Snopok Illinois Institute of Technology, Chicago, Illinois, USA H.G. Kirk, R.B. Palmer BNL, Upton, Long Island, New York, USA R.D. Ryne LBNL, Berkeley, California, USA
	Muon-based facilities offer a unique potential to provide capabilities at both the Intensity Frontier with Neutrino Factories and the Energy Frontier with Muon Colliders ranging from the Higgs energy to the multi-TeV energy range. They rely on novel technology with challenging parameters, which are currently being evaluated by the U.S. Muon Accelerator Program (MAP). A realistic scenario for a complementary series of staged facilities with increasing complexity and significant physics potential at each stage has been developed. It takes advantage of and leverages the capabilities already planned for Fermilab, especially Project X Stage II and LBNE. Each stage is defined in such a way to provide an R&D platform to validate the technologies required for subsequent stages. The rationale and sequence of the staging process, as well as the critical issues to be addressed at each stage, are presented.

THPHO19	A Charge Separation Study to Enable the Design of a Complete Muon Cooling Channel	1343
	C.Y. Yoshikawa, C.M. Ankenbrandt, R.P. Johnson Muons, Inc, Illinois, USA Y.S. Derbenev, V.S. Morozov JLAB, Newport News, Virginia, USA D.V. Neuffer, K. Yonehara Fermilab, Batavia, USA
	Funding: Work supported in part by DOE STTR grant DE-SC0007634 The most promising designs for 6D muon cooling channels operate on a specific sign of electric charge. In particular, the Helical Cooling Channel (HCC) and Rectilinear RFOFO designs are the leading candidates to become the baseline 6D cooling channel in the Muon Accelerator Program (MAP). Time constraints prevented the design of a realistic charge separator, so a simplified study was performed to emulate the effects of charge separation on muons exiting the front end of a muon collider. The output of the study provides particle distributions that the competing designs will use as input into their cooling channels. We report here on the study of the charge separator that created the simulated particles.

Paper

Title

Page

An Optimization Study of the Target Subsystem for the New g-2 Experiment

345

C.Y. Yoshikawa, C.M. Ankenbrandt
Muons, Inc, Illinois, USA
A.F. Leveling, N.V. Mokhov, J.P. Morgan, D.V. Neuffer, S.I. Striganov
Fermilab, Batavia, USA

Funding: Work supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy
A precision measurement of the muon anomalous magnetic moment, aμ = (g-2)/2, was previously performed at BNL with a result of 2.2 - 2.7 standard deviations above the Standard Model (SM) theoretical calculations. The same experimental apparatus is being planned to run in the new Muon Campus at Fermilab, where the muon beam is expected to have less pion contamination and the extended dataset may provide a possible 7.5σ deviation from the SM, creating a sensitive and complementary benchmark for proposed SM extensions. We report here on a study performed on the target subsystem utilizing a new optimization technique that overcomes complexities of asymmetric particle production and depth of focus of a Li lens. This new technique is applied to an apparatus that is optimized for pions that have favourable phase space to create polarized daughter muons around the magic momentum of 3.094 GeV/c, which is needed by the downstream g 2 muon ring.

TUPBA11

TOWARDS A GLOBAL OPTIMIZATION OF THE MUON ACCELERATOR FRONT END

547

H. K. Sayed, J.S. Berg, H.G. Kirk, R.B. Palmer, D. Stratakis
BNL, Upton, Long Island, New York, USA
K.T. McDonald
PU, Princeton, New Jersey, USA
D.V. Neuffer
Fermilab, Batavia, USA
J. Qiang, R.D. Ryne
LBNL, Berkeley, California, USA

The baseline design for the neutrino factory and muon collider front end consists of a five major components, namely the muon production target, decay channel, buncher, phase rotator, and the ionization cooling channel. Although each of the mentioned systems has a complex design which is optimized for the best performance with its own set of local objectives, the integration of all of them into one system requires a global optimization to insure the effectiveness of the local objectives and overall performance. This global optimization represents a highly constrained multi-objective optimization problem. The objectives aimed for are the number of muons captured into a stable bunches and their transverse and longitudinal emittances. These objectives are constrained by the momentum and dynamic acceptance of the subsequent acceleration systems in addition to the overall cost. A multi-objective global evolutionary algorithm is employed to address such a challenge. In this study a statement of optimization strategy is discussed along with preliminary results of the optimization.

TUPBA18

nuSTORM Pion Beamline Design Update

562

A. Liu, A.D. Bross, D.V. Neuffer
Fermilab, Batavia, USA
S.-Y. Lee
Indiana University, Bloomington, Indiana, USA

A facility producing neutrinos from muons that decay in a racetrack ring can provide extremely well understood neutrino beams for oscillation physics and the search for sterile neutrinos. The ‘‘neutrinos from STORed Muons"(nuSTORM) facility based on this idea has been introduced by Bross, Neuffer et al. The design of the nuSTORM facility and the particle tracking have been presented in the paper of Liu, et al. This paper demonstrates the recent optimization results of the pion beamline, with G4beamline simulations. The optimum choice of pion beam center momentum, a new algorithm on fitting bivariate Gaussian distribution to the pion phase space data at the downstream side of the horn, and the comparison of the beamline performance with the optics designed based on Graphite and Inconel targets are also described.

TUPBA20

A Staged Muon-based Facility to Enable Intensity and Energy Frontier Science in the US

565

J.-P. Delahaye
SLAC, Menlo Park, California, USA
C.M. Ankenbrandt
Muons, Inc, Illinois, USA
C.M. Ankenbrandt, S. Brice, A.D. Bross, D.S. Denisov, E. Eichten, R.J. Lipton, D.V. Neuffer, M.A. Palmer, P. Snopok
Fermilab, Batavia, USA
S.A. Bogacz
JLAB, Newport News, Virginia, USA
P. Huber
Virginia Polytechnic Institute and State University, Blacksburg, USA
D.M. Kaplan, P. Snopok
Illinois Institute of Technology, Chicago, Illinois, USA
H.G. Kirk, R.B. Palmer
BNL, Upton, Long Island, New York, USA
R.D. Ryne
LBNL, Berkeley, California, USA

Muon-based facilities offer a unique potential to provide capabilities at both the Intensity Frontier with Neutrino Factories and the Energy Frontier with Muon Colliders ranging from the Higgs energy to the multi-TeV energy range. They rely on novel technology with challenging parameters, which are currently being evaluated by the U.S. Muon Accelerator Program (MAP). A realistic scenario for a complementary series of staged facilities with increasing complexity and significant physics potential at each stage has been developed. It takes advantage of and leverages the capabilities already planned for Fermilab, especially Project X Stage II and LBNE. Each stage is defined in such a way to provide an R&D platform to validate the technologies required for subsequent stages. The rationale and sequence of the staging process, as well as the critical issues to be addressed at each stage, are presented.

THPHO19

A Charge Separation Study to Enable the Design of a Complete Muon Cooling Channel

1343

C.Y. Yoshikawa, C.M. Ankenbrandt, R.P. Johnson
Muons, Inc, Illinois, USA
Y.S. Derbenev, V.S. Morozov
JLAB, Newport News, Virginia, USA
D.V. Neuffer, K. Yonehara
Fermilab, Batavia, USA

Funding: Work supported in part by DOE STTR grant DE-SC0007634
The most promising designs for 6D muon cooling channels operate on a specific sign of electric charge. In particular, the Helical Cooling Channel (HCC) and Rectilinear RFOFO designs are the leading candidates to become the baseline 6D cooling channel in the Muon Accelerator Program (MAP). Time constraints prevented the design of a realistic charge separator, so a simplified study was performed to emulate the effects of charge separation on muons exiting the front end of a muon collider. The output of the study provides particle distributions that the competing designs will use as input into their cooling channels. We report here on the study of the charge separator that created the simulated particles.