Measurement of instabilities and ion heating in an electron beam ion source

Levine, Morton A.; Marrs, R. E.; Schmieder, Robert W.

doi:10.1016/0168-9002(85)91051-4

Cited by 19 publications

(12 citation statements)

References 10 publications

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“…Ion heating was a reason to doubt that an EBIT could produce high-charge states. Furthermore, during the design of the EBIT there was some concern that electron-ion plasma instabilities could heat the ions at a much faster rate [4,14].…”

Section: Ion Heating and Evaporative Coolingmentioning

confidence: 99%

“…The difficulty of adapting an EBIS for spectroscopy, as well as the difficulty of producing very high-charge states in a room temperature apparatus was demonstrated to the EBIT developers during work with an EBIS at Lawrence Berkeley National Laboratory (LBNL) and influenced the design of the EBIT [4]. This was the state of the art in 1985-1986 when the first EBIT was constructed at Lawrence Livermore National Laboratory (LLNL).…”

Section: Introductionmentioning

confidence: 96%

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Milestones in EBIT spectroscopy and why it almost did not work

Marrs¹

2008

Can. J. Phys.

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The electron beam ion trap (EBIT) spectroscopy that now seems routine would not be possible without considerable good luck in several areas of EBIT technology. Among these are X-ray background, ion cooling, neutral gas density, and electron current density and energy control. A favorable outcome in these areas has enabled clean X-ray spectra, sufficient intensity for high-resolution spectroscopy, production of very high-charge states, and a remarkable variety of spectroscopic measurements. During construction of the first EBIT 20 years ago, it was not clear that any of this was possible.PACS Nos.: 34.80.Kw, 32.30.Rj Résumé : La spectroscopie « EBIT » qui semble être devenu une opération de routine ne serait pas possible sans un peu de chance dans plusieurs aspects de la technologie EBIT. Parmi ceux-ci, notons le fond de rayons-X, le refroidissement des ions, la densité de gaz neutre, ainsi que la densité de courant électronique et le contrôle en énergie. Le bon fonctionnement de ces éléments a permis l'obtention de spectres X propres, une intensité suffisante pour une spectroscopie de haute résolution, la production d'états hautement chargés et une variété remarquable de mesures spectroscopiques. Lors de la construction du premier EBIT il y a 20 ans, il n'était pas évident que tout ceci serait possible.[Traduit par la Rédaction]

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Section: Ion Heating and Evaporative Coolingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Milestones in EBIT spectroscopy and why it almost did not work

Marrs¹

2008

Can. J. Phys.

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“…When the Berkeley EBIS failed to produce ions with a high enough charge state, Levine, Marrs, and Schmieder traced the problem to instabilities in the electron beam [8], which heated the ionsso rapidly that they diffused out of the beam before becoming sufficiently ionized. An examination of beam heating by Litwjn, Vella, and Sessler [9] showed that one type of instability, the modified rotational two-stream (RTS) instability, could only be minimized by reducing the beam length.…”

Section: Historymentioning

confidence: 99%

Design and operation of the electron beam ion trap

Vogel¹

1990

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This report describes the basic features and operating principles of the Electron Beam Ion Trap. The differences between EBIT and other sources of highly charged ions are outlined. Its features and operatingparameters are discussed. The report also explains why certain design choices were necessary and the constraints involved in building an electron beam ion trap. EBIT's evaporation cooling system is described in detail.

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“…One further possible advantage of a shorter trap is the suppression of certain types of plasma instabilities. Levine et al [5] concluded that the rotational electron-ion two stream instability was suppressed for short trap lengths.…”

Section: Introduction To Electron Beam Ion Trapsmentioning

confidence: 98%

“…The first electron beam ion trap (EBIT) was developed by Levine et al [5] as a development of the EBIS. The main difference is that the EBIT had a much shorter trap length compared to a typical EBIS.…”

Section: Introduction To Electron Beam Ion Trapsmentioning

confidence: 99%

Numerical simulation of the charge balance and temperature evolution in an electron beam ion trap

Currell

2009

Phys. Rev. ST Accel. Beams

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A computer code has been developed to simulate and study the evolution of ion charge states inside the trap region of an electron beam ion trap. In addition to atomic physics phenomena previously included in similar codes such as electron impact ionization, radiative recombination, and charge exchange, several aspects of the relevant physics such as dielectronic recombination, ionization heating, and ion cloud expansion have been included for the first time in the model. The code was developed using object oriented concepts with database support, making it readable, accurate, and well organized. The simulation results show a good agreement with various experiments, and give useful information for selection of operating conditions and experiment design.

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Measurement of instabilities and ion heating in an electron beam ion source

Cited by 19 publications

References 10 publications

Milestones in EBIT spectroscopy and why it almost did not work

Milestones in EBIT spectroscopy and why it almost did not work

Design and operation of the electron beam ion trap

Numerical simulation of the charge balance and temperature evolution in an electron beam ion trap

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