COOL2015 - List of Keywords (space-charge)

Paper	Title	Other Keywords	Page
MOPF03	Electron Lenses and Cooling for the Fermilab Integrable Optics Test Accelerator	electron, optics, proton, lattice	32
	G. Stancari, A.V. Burov, V.A. Lebedev, S. Nagaitsev, E. Prebys, A. Valishev Fermilab, Batavia, Illinois, USA
	Funding: Fermilab is operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the US Department of Energy. Recently, the study of integrable Hamiltonian systems has led to nonlinear accelerator lattices with one or two transverse invariants and wide stable tune spreads. These lattices may drastically improve the performance of high-intensity machines, providing Landau damping to protect the beam from instabilities, while preserving dynamic aperture. The Integrable Optics Test Accelerator (IOTA) is being built at Fermilab to study these concepts with 150-MeV pencil electron beams (single-particle dynamics) and 2.5-MeV protons (dynamics with self fields). One way to obtain a nonlinear integrable lattice is by using the fields generated by a magnetically confined electron beam (electron lens) overlapping with the circulating beam. The required parameters are similar to the ones of existing devices. In addition, the electron lens will be used in cooling mode to control the brightness of the proton beam and to measure transverse profiles through recombination. More generally, it is of great interest to investigate whether nonlinear integrable optics allows electron coolers to exceed limitations set by both coherent or incoherent instabilities excited by space charge.
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TUZAUD03	Simulation Studies on Intensity Limitations of Laser Cooling at High Energy	laser, synchrotron, ion, scattering	93
	L. Eidam, O. Boine-Frankenheim, D.F.A. Winters GSI, Darmstadt, Germany
	Within the FAIR project, laser cooling of highly intense, ultra relativistic ion beams will be attempted for the first time, and in a large (circumference 1084 m) and strong (max. magnetic rigidity 100 Tm) synchrotron, called "SIS100". Laser cooling of such ion beams should result in a further increase of the longitudinal phase space density and in non-Gaussian longitudinal beam profiles. For stable operation of such ion beams, and for optimization of the cooling process, both the laser force and the high-intensity effects have to be studied numerically in advance. The efficiency of laser cooling has been analyzed for different synchrotron frequency regimes. At high beam intensities, intra-beam scattering and space-charge effects have been found to counteract the laser cooling force. We will discuss how they influence the laser cooling efficiency and thus affect the cooling time.
	Slides TUZAUD03 [5.044 MB]
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Paper

Title

Other Keywords

Page

MOPF03

Electron Lenses and Cooling for the Fermilab Integrable Optics Test Accelerator

electron, optics, proton, lattice

32

G. Stancari, A.V. Burov, V.A. Lebedev, S. Nagaitsev, E. Prebys, A. Valishev
Fermilab, Batavia, Illinois, USA

Funding: Fermilab is operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the US Department of Energy.
Recently, the study of integrable Hamiltonian systems has led to nonlinear accelerator lattices with one or two transverse invariants and wide stable tune spreads. These lattices may drastically improve the performance of high-intensity machines, providing Landau damping to protect the beam from instabilities, while preserving dynamic aperture. The Integrable Optics Test Accelerator (IOTA) is being built at Fermilab to study these concepts with 150-MeV pencil electron beams (single-particle dynamics) and 2.5-MeV protons (dynamics with self fields). One way to obtain a nonlinear integrable lattice is by using the fields generated by a magnetically confined electron beam (electron lens) overlapping with the circulating beam. The required parameters are similar to the ones of existing devices. In addition, the electron lens will be used in cooling mode to control the brightness of the proton beam and to measure transverse profiles through recombination. More generally, it is of great interest to investigate whether nonlinear integrable optics allows electron coolers to exceed limitations set by both coherent or incoherent instabilities excited by space charge.

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

TUZAUD03

Simulation Studies on Intensity Limitations of Laser Cooling at High Energy

laser, synchrotron, ion, scattering

93

L. Eidam, O. Boine-Frankenheim, D.F.A. Winters
GSI, Darmstadt, Germany

Within the FAIR project, laser cooling of highly intense, ultra relativistic ion beams will be attempted for the first time, and in a large (circumference 1084 m) and strong (max. magnetic rigidity 100 Tm) synchrotron, called "SIS100". Laser cooling of such ion beams should result in a further increase of the longitudinal phase space density and in non-Gaussian longitudinal beam profiles. For stable operation of such ion beams, and for optimization of the cooling process, both the laser force and the high-intensity effects have to be studied numerically in advance. The efficiency of laser cooling has been analyzed for different synchrotron frequency regimes. At high beam intensities, intra-beam scattering and space-charge effects have been found to counteract the laser cooling force. We will discuss how they influence the laser cooling efficiency and thus affect the cooling time.

Slides TUZAUD03 [5.044 MB]

Export •

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