PAC2013 - List of Authors (Nagaitsev, S.)

Paper

Title

Page

Beam-Beam Limit in an Integrable System

75

A. Valishev, S. Nagaitsev
Fermilab, Batavia, USA
V.V. Danilov
ORNL, Oak Ridge, Tennessee, USA
D.N. Shatilov
BINP SB RAS, Novosibirsk, Russia

Funding: Fermi Research Alliance, LLC operates Fermilab under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
Round colliding beams have been proposed as a way to push the attainable beam-beam tune shift limit, and recent successful experiments at the VEPP-2000 collider at BINP demonstrated the viability of the concept. In a round-beam system the dynamical stability is improved by introducing an additional integral of motion, which effectively reduces the system from a two and a half dimensional to one and a half dimensional. In this report we discuss the possible further improvement through adding the second integral of motion and thus making the system fully integrable. We explore the ultimate beam-beam limit in such a system using numerical simulations taking into account various imperfections.

Slides MOODB1 [1.019 MB]

MOODB2

A Model Ring With Exactly Solvable Nonlinear Motion

78

T.V. Zolkin
University of Chicago, Chicago, Illinois, USA
Y. Kharkov, I.A. Morozov
BINP SB RAS, Novosibirsk, Russia
S. Nagaitsev
Fermilab, Batavia, USA

Recently, a concept of nonlinear accelerator lattices with two analytic invariants has been proposed. Based on further studies, the Integrable Optics Test Accelerator (IOTA) was designed and is being constructed at the FNAL. Despite the clarity and transparency of the proposed idea, the detailed analysis of the beam motion remains quite complicated and should be understood better even for the case when no perturbations are taken into account. In this paper we will review one of the three proposed realizations of the integrable optics, where the variables separation is possible in polar coordinates. This system allows for an exact analytical solution expressed in terms of elliptic integrals and Jacobi elliptic functions. It gives the possibility to check numerical algorithms used for tracking and to perform more rigorous analysis of the motion in comparison with the "crude" analysis of the topology of the phase space. In addition we will discuss some difficulties associated with numerical simulations of such a comparatively complex dynamical system and will take a look at the possible perturbations for a model machine.

Slides MOODB2 [0.987 MB]

MOPAC16

Issues and R&D Required for the Intensity Frontier Accelerators

99

V.D. Shiltsev, S. Henderson, P. Hurh, I. Kourbanis, V.A. Lebedev, S. Nagaitsev
Fermilab, Batavia, USA

Operation, upgrade and development of accelerators for Intensity Frontier face formidable challenges in order to satisfy both the near-term and long-term Particle Physics program. The near-term program continuing throughout this decade includes the long-baseline neutrino experiments and a muon program focused on precision/rare processes. It requires: a) double the beam power capability of the Booster; b) double the beam power capability of the Main Injector; and c)build-out the muon campus infrastructure and capability based on the 8 GeV proton source. We discuss key issues and R&D required for the Intensity Frontier accelerators.

MOPMA09

Status and Opportunities at Project X: A Multi-MW Facility for Intensity Frontier Research

315

S.D. Holmes, M. Kaducak, R.D. Kephart, I. Kourbanis, V.A. Lebedev, C.S. Mishra, S. Nagaitsev, N. Solyak, R.S. Tschirhart
Fermilab, Batavia, USA

Funding: Work supported by the Fermi Research Alliance under U.S. Department of Energy contract number DE-AC02-07CH11359
Project X is a high intensity proton facility that will support a world-leading U.S. program in Intensity Frontier physics over the next several decades. Project X is currently under development by Fermilab in collaboration with national and international partners. Project X will be unique in its ability to deliver, simultaneously, up to 6 MW of site-wide beam power to multiple experiments, at energies ranging from 235 MeV to 120 GeV, and with flexible and independently controlled beam time patterns. Project X will support a wide range of experiments utilizing neutrino, muon, kaon, nucleon, and atomic probes [1,2]. In addition, Project X will lay the foundation for the long-term development of a Neutrino Factory and/or Muon Collider.

TUYAA1

The Project-X Injector Experiment: A Novel High Performance Front-end for a Future High Power Proton Facility at Fermilab

374

S. Nagaitsev, S.D. Holmes, D.E. Johnson, M. Kaducak, R.D. Kephart, V.A. Lebedev, C.S. Mishra, A.V. Shemyakin, N. Solyak, R.P. Stanek, V.P. Yakovlev
Fermilab, Batavia, USA
D. Li
LBNL, Berkeley, California, USA
S. Malhotra, M.M. Pande, P. Singh
BARC, Mumbai, India
P.N. Ostroumov
ANL, Argonne, USA

This presentation should describe the Project X Injector Experiment (PXIE)and its connection with Project X. It should focus on the novel aspects of PXIE, namely the programmable, bunch-by-bunch chopping of a CW H⁻ beam; acceleration in CW superconducting RF structures immediately following the RFQ; operation of SRF structures adjacent to a high-power chopper target; and preservation of high-quality chopped beams with acceptable emittance growth and halo.

Slides TUYAA1 [8.806 MB]

WEPBA16

Possible Experiments on Wave Function Localization Due to Compton Scattering

919

V.V. Danilov, A.V. Aleksandrov, J. Galambos, T.V. Gorlov, Y. Liu, A.P. Shishlo
ORNL, Oak Ridge, Tennessee, USA
S. Nagaitsev
Fermilab, Batavia, USA

Funding: This work is supported by the U.S. Department of Energy under contracts No. DE-AC02-07CH11359 and No. DE-AC05-00OR22725.
The reduction of a particle’s wave function in the process of radiation or light scattering is a longstanding problem. Its solution will give a clue on processes that form, for example, wave functions of electrons constantly emitting synchrotron radiation quanta in storage rings. On a more global scale, it may shed light on wave function collapse due to the process of measurement. In this paper we consider various experimental options using Fermilab electron beams and a possible electron beam from the SNS linac and lasers to detect electron wave function change due to Compton scattering.

WEPBA17

Measurement of Non-Linear Insert Magnets

922

F.H. O'Shea, R.B. Agustsson, A.Y. Murokh, E. Spranza
RadiaBeam, Marina del Rey, USA
S. Nagaitsev, A. Valishev
Fermilab, Batavia, USA

Fermilab's Integrable Optics Test Accelerator (IOTA) is an electron storage ring designed for testing advanced accelerator physics concepts, including implementation of nonlinear integrable beam optics and experiments on optical stochastic cooling. In this report we describe the contribution of RadiaBeam Technologies to the IOTA project which includes nonlinear magnet engineering, production and measurement.

Paper	Title	Page
MOODB1	Beam-Beam Limit in an Integrable System	75
	A. Valishev, S. Nagaitsev Fermilab, Batavia, USA V.V. Danilov ORNL, Oak Ridge, Tennessee, USA D.N. Shatilov BINP SB RAS, Novosibirsk, Russia
	Funding: Fermi Research Alliance, LLC operates Fermilab under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. Round colliding beams have been proposed as a way to push the attainable beam-beam tune shift limit, and recent successful experiments at the VEPP-2000 collider at BINP demonstrated the viability of the concept. In a round-beam system the dynamical stability is improved by introducing an additional integral of motion, which effectively reduces the system from a two and a half dimensional to one and a half dimensional. In this report we discuss the possible further improvement through adding the second integral of motion and thus making the system fully integrable. We explore the ultimate beam-beam limit in such a system using numerical simulations taking into account various imperfections.
	Slides MOODB1 [1.019 MB]

MOODB2	A Model Ring With Exactly Solvable Nonlinear Motion	78
	T.V. Zolkin University of Chicago, Chicago, Illinois, USA Y. Kharkov, I.A. Morozov BINP SB RAS, Novosibirsk, Russia S. Nagaitsev Fermilab, Batavia, USA
	Recently, a concept of nonlinear accelerator lattices with two analytic invariants has been proposed. Based on further studies, the Integrable Optics Test Accelerator (IOTA) was designed and is being constructed at the FNAL. Despite the clarity and transparency of the proposed idea, the detailed analysis of the beam motion remains quite complicated and should be understood better even for the case when no perturbations are taken into account. In this paper we will review one of the three proposed realizations of the integrable optics, where the variables separation is possible in polar coordinates. This system allows for an exact analytical solution expressed in terms of elliptic integrals and Jacobi elliptic functions. It gives the possibility to check numerical algorithms used for tracking and to perform more rigorous analysis of the motion in comparison with the "crude" analysis of the topology of the phase space. In addition we will discuss some difficulties associated with numerical simulations of such a comparatively complex dynamical system and will take a look at the possible perturbations for a model machine.
	Slides MOODB2 [0.987 MB]

MOPAC16	Issues and R&D Required for the Intensity Frontier Accelerators	99
	V.D. Shiltsev, S. Henderson, P. Hurh, I. Kourbanis, V.A. Lebedev, S. Nagaitsev Fermilab, Batavia, USA
	Operation, upgrade and development of accelerators for Intensity Frontier face formidable challenges in order to satisfy both the near-term and long-term Particle Physics program. The near-term program continuing throughout this decade includes the long-baseline neutrino experiments and a muon program focused on precision/rare processes. It requires: a) double the beam power capability of the Booster; b) double the beam power capability of the Main Injector; and c)build-out the muon campus infrastructure and capability based on the 8 GeV proton source. We discuss key issues and R&D required for the Intensity Frontier accelerators.

MOPMA09	Status and Opportunities at Project X: A Multi-MW Facility for Intensity Frontier Research	315
	S.D. Holmes, M. Kaducak, R.D. Kephart, I. Kourbanis, V.A. Lebedev, C.S. Mishra, S. Nagaitsev, N. Solyak, R.S. Tschirhart Fermilab, Batavia, USA
	Funding: Work supported by the Fermi Research Alliance under U.S. Department of Energy contract number DE-AC02-07CH11359 Project X is a high intensity proton facility that will support a world-leading U.S. program in Intensity Frontier physics over the next several decades. Project X is currently under development by Fermilab in collaboration with national and international partners. Project X will be unique in its ability to deliver, simultaneously, up to 6 MW of site-wide beam power to multiple experiments, at energies ranging from 235 MeV to 120 GeV, and with flexible and independently controlled beam time patterns. Project X will support a wide range of experiments utilizing neutrino, muon, kaon, nucleon, and atomic probes [1,2]. In addition, Project X will lay the foundation for the long-term development of a Neutrino Factory and/or Muon Collider.

TUYAA1	The Project-X Injector Experiment: A Novel High Performance Front-end for a Future High Power Proton Facility at Fermilab	374
	S. Nagaitsev, S.D. Holmes, D.E. Johnson, M. Kaducak, R.D. Kephart, V.A. Lebedev, C.S. Mishra, A.V. Shemyakin, N. Solyak, R.P. Stanek, V.P. Yakovlev Fermilab, Batavia, USA D. Li LBNL, Berkeley, California, USA S. Malhotra, M.M. Pande, P. Singh BARC, Mumbai, India P.N. Ostroumov ANL, Argonne, USA
	This presentation should describe the Project X Injector Experiment (PXIE)and its connection with Project X. It should focus on the novel aspects of PXIE, namely the programmable, bunch-by-bunch chopping of a CW H⁻ beam; acceleration in CW superconducting RF structures immediately following the RFQ; operation of SRF structures adjacent to a high-power chopper target; and preservation of high-quality chopped beams with acceptable emittance growth and halo.
	Slides TUYAA1 [8.806 MB]

WEPBA16	Possible Experiments on Wave Function Localization Due to Compton Scattering	919
	V.V. Danilov, A.V. Aleksandrov, J. Galambos, T.V. Gorlov, Y. Liu, A.P. Shishlo ORNL, Oak Ridge, Tennessee, USA S. Nagaitsev Fermilab, Batavia, USA
	Funding: This work is supported by the U.S. Department of Energy under contracts No. DE-AC02-07CH11359 and No. DE-AC05-00OR22725. The reduction of a particle’s wave function in the process of radiation or light scattering is a longstanding problem. Its solution will give a clue on processes that form, for example, wave functions of electrons constantly emitting synchrotron radiation quanta in storage rings. On a more global scale, it may shed light on wave function collapse due to the process of measurement. In this paper we consider various experimental options using Fermilab electron beams and a possible electron beam from the SNS linac and lasers to detect electron wave function change due to Compton scattering.

WEPBA17	Measurement of Non-Linear Insert Magnets	922
	F.H. O'Shea, R.B. Agustsson, A.Y. Murokh, E. Spranza RadiaBeam, Marina del Rey, USA S. Nagaitsev, A. Valishev Fermilab, Batavia, USA
	Fermilab's Integrable Optics Test Accelerator (IOTA) is an electron storage ring designed for testing advanced accelerator physics concepts, including implementation of nonlinear integrable beam optics and experiments on optical stochastic cooling. In this report we describe the contribution of RadiaBeam Technologies to the IOTA project which includes nonlinear magnet engineering, production and measurement.