Cooling Force Measurements at CELSIUS

Gålnander, Björn; Fedotov, A. V.; Litvinenko, Vladimir; Lofnes, Tor; Sidorin, A. O.; Smirnov, Alexander V.; Ziemann, Volker

doi:10.1063/1.2190120

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…3 (color online). Decays of stored negative oxygen O − ions in ELISA ring at 22 keV beam energy: a) experimental data taken from [15], beam lifetime τ = 12 s; b) BETACOOL simulations [34,35]. Pink curve shows the drop of the beam current in ELISA ring with electrodes of spherical shape.…”

Section: Nonlinear Effects In Electrostatic Storage Ringsmentioning

confidence: 99%

“…The program was initially developed by JINR scientists (Dubna, Russia) in collaboration with leading scientiˇc centers worldwide in order to estimate heating and cooling effects in high-energy storage rings with electron cooling [25]. The BETACOOL code was successfully benchmarked at BNL RHIC (USA) [26Ä28], RIKEN (Japan) [29,30], COSY synchrotron (KFZ, Juelich, Germany) [31,32], ESR and HESR storage rings (GSI, Darmstadt, Germany) [33,34], CELSIUS storage ring (Uppsala, Sweeden) [35], S-LSR ring of Kyoto University (Japan) [36], etc.…”

Section: Ion Kinetics and Long-term Beam Dynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Beam dynamics in an ultra-low energy storage rings (review of existing facilities and feasibility studies for future experiments)

2014

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Section: Nonlinear Effects In Electrostatic Storage Ringsmentioning

confidence: 99%

Section: Ion Kinetics and Long-term Beam Dynamicsmentioning

confidence: 99%

Beam dynamics in an ultra-low energy storage rings (review of existing facilities and feasibility studies for future experiments)

2014

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“…We have derived growth rates of root mean square (rms) beam emittance and rms momentum spread by simulating the evolution of the ion distribution function with time, using the BETACOOL code to study the long-term beam dynamics in storage rings [26,27]. Initially developed by JINR scientists in collaboration with leading scientific centers worldwide to estimate heating and cooling effects in high-energy storage rings with electron cooling, BETACOOL has been successfully benchmarked at different accelerator labs worldwide [28][29][30][31][32][33][34][35][36][37]. The software is under continual development and new physics models in the lowenergy range were implemented for our particular studies.…”

Section: Ion Kinetics and Long-term Beam Dynamicsmentioning

confidence: 99%

Nonlinear and long-term beam dynamics in low energy storage rings

Papash

Smirnov

Welsch

2013

Phys. Rev. ST Accel. Beams

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Electrostatic storage rings operate at very low energies in the keV range and have proven to be invaluable tools for atomic and molecular physics. Because of the mass independence of electric rigidity, these machines are able to store a wide range of different particles, from light ions to heavy singly charged biomolecules, opening up unique research opportunities. However, earlier measurements have shown strong limitations in maximum beam intensity, fast decay of the stored ion current, and reduced beam lifetime. The nature of these effects has not been fully understood and an improved understanding of the physical processes influencing beam motion and stability in such rings is needed. In this paper, a comprehensive study into nonlinear and long-term beam dynamics studies is presented on the examples of a number of existing and planned electrostatic storage rings using the BETACOOL, OPERA-3D, and MAD-X simulation software. A detailed investigation into ion kinetics, under consideration of effects from electron cooling and multiple scattering of the beam on a supersonic gas jet target, is carried out and yields a consistent explanation of the physical effects in a whole class of storage rings. The lifetime, equilibrium momentum spread, and equilibrium lateral spread during collisions with the target are estimated. In addition, the results from experiments at the Test Storage Ring, where a low-intensity beam of CF þ ions at 93 keV=u has been shrunk to extremely small dimensions, are reproduced. Based on these simulations, the conditions for stable ring operation with an extremely low-emittance beam are presented. Finally, results from studies into the interaction of 3-30 keV ions with a gas jet target are summarized.

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“…at the ESR at GSI [130][131][132], the TSR at Heidelberg [19,20], CRYRING at Stockholm [32,33] and CELSIUS at Uppsala [45]. For an insight into the cooling process itself a more detailed study of basic quantities like the stopping forces is needed.…”

Section: Cooling Forcesmentioning

confidence: 99%