COOL2015 - List of Authors (Lebedev, V.A.)

Paper	Title	Page
MOPF03	Electron Lenses and Cooling for the Fermilab Integrable Optics Test Accelerator	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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MOPF10	Design Beam Diagnostic System for Optical Stochastic Cooling at IOTA Ring	55
	K. Yonehara, V.A. Lebedev Fermilab, Batavia, Illinois, USA J.A. Maloney TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	Validation test of optical stochastic cooling (OSC) with 100 MeV electron beam is designed at IOTA ring at Fermilab. A beam diagnostic system for the test is discussed in this paper. The beam position and bunch length will be measured by using a standard button-pickup BPM; while the beam emittance will be measured by using a CCD-based synchrotron light detector. Especially, accurate time measurement is essential to carry out OSC experiments with a single particle. Desired time resolution is the order of 100 ps to study the cooling decrement in various lattice parameters. SiPM is an attractive solid-state device to detect a time domain synchrotron radiation photon. It can realize a fast rise time < 100 ps with a short time width 1-2 ns FWHM and its quantum efficiency is > 40 % at 420 nm. The beam instrumentation required to tune timing in the OSC insert is also discussed. It is based on the interference of radiation coming from the pickup and kicker undulators.
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WEWAUD03	Optical Stochastic Cooling at IOTA ring	123
	V.A. Lebedev, A.L. Romanov Fermilab, Batavia, Illinois, USA
	The optical stochastic cooling (OSC) represents a promising novel technology capable to achieve fast cooling rates required to support high luminosity of future hadron colliders. The OSC is based on the same principles as the normal microwave stochastic cooling but uses much smaller wave length resulting in a possibility of cooling of very dense bunches. In this paper we consider basic principles of the OSC operation and main limitations on its practical implementation. Conclusions will be illustrated by Fermilab proposal of the OSC test in the IOTA ring. Work supported by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy.
	Slides WEWAUD03 [1.018 MB]
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WEWAUD04	Single-pass-amplifier for Optical Stochastic Cooling Proof-of-Principle Experiment at IOTA	128
	M.B. Andorf, P. Piot Northern Illinois University, DeKalb, Illinois, USA V.A. Lebedev, P. Piot, J. Ruan Fermilab, Batavia, Illinois, USA
	Funding: This work is supported by the US DOE contracts No. DE-SC0013761 with Northern Illinois University and No. DE-AC02-07CH11359 with the Fermi Research Alliance, LLC which operates Fermilab. Test design of a single-pass mid-infrared Cr:ZnSe optical amplifier for an optical stochastic cooling (OSC) proof-ofprinciple experiment foreseen at the Integrable Optics Test Accelerator (IOTA) ring part of Fermilab Accelerator Science & Technology (FAST) facility. We especially present an estimate of the gain and evaluate effects of thermal lensing. A conceptual design of the amplifier and associated optics is provided.
	Slides WEWAUD04 [1.155 MB]
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Paper

Title

Page

Electron Lenses and Cooling for the Fermilab Integrable Optics Test Accelerator

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)

MOPF10

Design Beam Diagnostic System for Optical Stochastic Cooling at IOTA Ring

55

K. Yonehara, V.A. Lebedev
Fermilab, Batavia, Illinois, USA
J.A. Maloney
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

Validation test of optical stochastic cooling (OSC) with 100 MeV electron beam is designed at IOTA ring at Fermilab. A beam diagnostic system for the test is discussed in this paper. The beam position and bunch length will be measured by using a standard button-pickup BPM; while the beam emittance will be measured by using a CCD-based synchrotron light detector. Especially, accurate time measurement is essential to carry out OSC experiments with a single particle. Desired time resolution is the order of 100 ps to study the cooling decrement in various lattice parameters. SiPM is an attractive solid-state device to detect a time domain synchrotron radiation photon. It can realize a fast rise time < 100 ps with a short time width 1-2 ns FWHM and its quantum efficiency is > 40 % at 420 nm. The beam instrumentation required to tune timing in the OSC insert is also discussed. It is based on the interference of radiation coming from the pickup and kicker undulators.

Export •

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

WEWAUD03

Optical Stochastic Cooling at IOTA ring

123

V.A. Lebedev, A.L. Romanov
Fermilab, Batavia, Illinois, USA

The optical stochastic cooling (OSC) represents a promising novel technology capable to achieve fast cooling rates required to support high luminosity of future hadron colliders. The OSC is based on the same principles as the normal microwave stochastic cooling but uses much smaller wave length resulting in a possibility of cooling of very dense bunches. In this paper we consider basic principles of the OSC operation and main limitations on its practical implementation. Conclusions will be illustrated by Fermilab proposal of the OSC test in the IOTA ring.
Work supported by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy.

Slides WEWAUD03 [1.018 MB]

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

WEWAUD04

Single-pass-amplifier for Optical Stochastic Cooling Proof-of-Principle Experiment at IOTA

128

M.B. Andorf, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
V.A. Lebedev, P. Piot, J. Ruan
Fermilab, Batavia, Illinois, USA

Funding: This work is supported by the US DOE contracts No. DE-SC0013761 with Northern Illinois University and No. DE-AC02-07CH11359 with the Fermi Research Alliance, LLC which operates Fermilab.
Test design of a single-pass mid-infrared Cr:ZnSe optical amplifier for an optical stochastic cooling (OSC) proof-ofprinciple experiment foreseen at the Integrable Optics Test Accelerator (IOTA) ring part of Fermilab Accelerator Science & Technology (FAST) facility. We especially present an estimate of the gain and evaluate effects of thermal lensing. A conceptual design of the amplifier and associated optics is provided.

Slides WEWAUD04 [1.155 MB]

Export •

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