PAC2013 - List of Authors (Ankenbrandt, C.M.)

Paper	Title	Page
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.

MOPAC26	Beam Brightness Booster with Ionization Cooling of Superintense Circulating Beams	123
	V.G. Dudnikov, C.M. Ankenbrandt, R.P. Johnson, L.G. Vorobiev Muons, Inc, Illinois, USA
	An increase of intensity and brightness of proton beam by means of charge exchange injection and devices developed for this experiment are considered. First observation of e-p instability, explanation and damping by feed back are discussed. Discovery of “cesiation effect” leading to multiple increase of negative ion emission from gas discharges and development of surface-plasma sources for intense high brightness negative ion beams production are considered. By these developments were prepared a possibility for production of stable “superintense” circulating beam with intensity and brightness fare above space charge limit. A beam brightness booster (BBB) for significant increase of accumulated beam brightness is discussed. New opportunity for simplification of the superintense beam production is promised by developing of nonlinear close to integrable focusing system with broad spread of betatron tune and the broad bend feed back system for e-p instability suppression. Effects of ionization cooling can be used for suppression of the beam particle scattering in the stripping target

MOPBA12	Mitigation of Numerical Noise for Space Charge Calculations in Tracking Codes	198
	L.G. Vorobiev, C.M. Ankenbrandt, T.J. Roberts Muons, Inc, Illinois, USA F. Schmidt CERN, Geneva, Switzerland
	Modern tracking codes have very high requirements to space charge calculations. They should combine the speed of calculations, to be able to track particles for very many turns (LHC accelerator chain, storage rings, etc), and a numerical accuracy and a physical symplecticity. Grid solvers and the modified Green's function algorithms were considered, compared, and the upgrades were suggested.

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.

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

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.

MOPAC26

Beam Brightness Booster with Ionization Cooling of Superintense Circulating Beams

123

V.G. Dudnikov, C.M. Ankenbrandt, R.P. Johnson, L.G. Vorobiev
Muons, Inc, Illinois, USA

An increase of intensity and brightness of proton beam by means of charge exchange injection and devices developed for this experiment are considered. First observation of e-p instability, explanation and damping by feed back are discussed. Discovery of “cesiation effect” leading to multiple increase of negative ion emission from gas discharges and development of surface-plasma sources for intense high brightness negative ion beams production are considered. By these developments were prepared a possibility for production of stable “superintense” circulating beam with intensity and brightness fare above space charge limit. A beam brightness booster (BBB) for significant increase of accumulated beam brightness is discussed. New opportunity for simplification of the superintense beam production is promised by developing of nonlinear close to integrable focusing system with broad spread of betatron tune and the broad bend feed back system for e-p instability suppression. Effects of ionization cooling can be used for suppression of the beam particle scattering in the stripping target

MOPBA12

Mitigation of Numerical Noise for Space Charge Calculations in Tracking Codes

198

L.G. Vorobiev, C.M. Ankenbrandt, T.J. Roberts
Muons, Inc, Illinois, USA
F. Schmidt
CERN, Geneva, Switzerland

Modern tracking codes have very high requirements to space charge calculations. They should combine the speed of calculations, to be able to track particles for very many turns (LHC accelerator chain, storage rings, etc), and a numerical accuracy and a physical symplecticity. Grid solvers and the modified Green's function algorithms were considered, compared, and the upgrades were suggested.

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.

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.