Three-Dimensional Laser Cooling of Stored and Circulating Ion Beams by Means of a Coupling Cavity

Okamoto, Hiromi; Sessler, Andrew M.; Möhl, D.

doi:10.1103/physrevlett.72.3977

Cited by 53 publications

(38 citation statements)

References 9 publications

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“…The sympathetic scheme is thus irrelevant for our present purpose to achieve fast multidimensional laser cooling and consequent ultracold beam generation. In order to overcome these difficulties, we employed the synchrobetatron resonance coupling (SBRC) scheme, proposed by Okamoto et al [10,11], to artificially and dramatically enhance the transverse indirect laser-cooling efficiency. According to molecular dynamics (MD) simulations by Wei et al [12], it is theoretically possible to reduce the beam temperature in all three dimensions if the cooling force is sufficiently strong, and the ring lattice is properly designed to satisfy the so-called ''maintenance condition.''…”

Section: Introductionmentioning

confidence: 99%

Resonance coupling induced enhancement of indirect transverse cooling in a laser-cooled ion beam

Nakao

T.Hiromasa

Souda

et al. 2012

Phys. Rev. ST Accel. Beams

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We report the first observation of indirect resonantly enhanced transverse laser cooling of a bunched, stored ion beam of 40 keV 24 Mg þ . The longitudinal velocity distribution and the horizontal beam size of the laser-cooled 24 Mg þ ion beam with 280 nm laser light were simultaneously observed by the use of standard fluorescence-based techniques. Keeping the operation point at (2.068, 1.105), the synchrotron tune ( s ) was changed from 0.0376 to 0.1299. A strong decrease in the cooled horizontal beam size and a corresponding increase in the equilibrium cooled momentum spread were observed at the expected synchrobetatron resonance coupling condition of s ¼ 0:068, which is the first observation of a resonantly induced coupling for enhanced indirect transverse laser cooling of an ion beam, and is an important step towards creating a crystalline ground state of the beam.

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Section: Introductionmentioning

confidence: 99%

Resonance coupling induced enhancement of indirect transverse cooling in a laser-cooled ion beam

Nakao

T.Hiromasa

Souda

et al. 2012

Phys. Rev. ST Accel. Beams

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“…It has been shown both theoretically and numerically that one can enhance the transverse cooling rates up to the same level as the longitudinal rate. Introduction of a coupling cavity operating in w,,, mode is an alternate, mathematically equivalent scheme [9]. We can verify that the coupling cavity even more improves the transverse cooling efficiency.…”

Section: Introductionmentioning

confidence: 65%

Theory of tapered laser cooling

Okamoto¹,

Wei²

1998

Self Cite

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A theory of tapered laser cooling for fast circulating ion beams in a storage ring is constructed. We describe the fundamentals of this new cooling scheme, emphasizing that it might be the most promising way to beam crystallization. The cooling rates are analytically evaluated to study the ideal operating condition. We discuss the physical implication of the tapering factor of cooling laser, and show how to determine its optimum value. Molecular dynamics method is employed to demonstrate the validity of the present theory.

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“…[7]. Cylindrical cavities operating in the TM 210 mode (thus with a quadratic dependence of the longitudinal electric field on the distance from the axis) to couple the longitudinal and transverse motion to enhance laser cooling of ions in a storage ring [8], or to establish a correlation between betatron amplitude and momentum deviation to condition an FEL electron beam [9], have also been proposed. For the system under consideration we use a rectangular cavity having a longitudinal electric field which varies linearly with transverse distance, x, from the axis, as shown in Fig.…”

Section: The Dipole-mode Cavitymentioning

confidence: 99%

Transverse to Longitudinal Emittance Exchange

Emma¹

2002

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A scheme is proposed to exchange the transverse and longitudinal emittances of an electron bunch. A general analysis is presented and a specific beamline is used as an example where the emittance exchange is achieved by placing a transverse deflecting mode radio-frequency cavity in a magnetic chicane. In addition to reducing the transverse emittance, the bunch length is also simultaneously compressed. The scheme has the potential to introduce an added flexibility to the control of electron beams and to provide some contingency for the achievement of emittance and peak-current goals in free-electron lasers.

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Three-Dimensional Laser Cooling of Stored and Circulating Ion Beams by Means of a Coupling Cavity

Cited by 53 publications

References 9 publications

Resonance coupling induced enhancement of indirect transverse cooling in a laser-cooled ion beam

Resonance coupling induced enhancement of indirect transverse cooling in a laser-cooled ion beam

Theory of tapered laser cooling

Transverse to Longitudinal Emittance Exchange

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