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O. Tarvainen
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Journal Articles

Influence of microwave parameters on the xenon afterglow beam currents of a superconducting electron cyclotron resonance ion source

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L. X. Li, J. B. Li, J. D. Ma, Y. C. Feng, X. Y. Wang, X. Fang, W. Lu, O. Tarvainen, L. T. Sun, H. W. Zhao
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 96, 023303 (2025)
https://doi.org/10.1063/5.0251710
Published: February 2025
View articletitled, Influence of microwave parameters on the xenon afterglow beam currents of a superconducting electron cyclotron resonance ion source
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Journal Articles

Experimental investigation of electrostatic capture of 1+ ions in charge breeder electron cyclotron resonance ion source plasma

Editor’s PickOpen Access
O. Tarvainen, J. Angot, P. Chauveau, A. Galatà, T. Thuillier
Journal: Physics of Plasmas
Phys. Plasmas 31, 053103 (2024)
https://doi.org/10.1063/5.0202875
Published: May 2024
View articletitled, Experimental investigation of electrostatic capture of 1+ ions in charge breeder electron cyclotron resonance ion source plasma
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Journal Articles

The effects of electron energy distribution and ionization cross section uncertainty on charge breeder ion source diagnostics with pulsed 1 + injection

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M. Luntinen, J. Angot, H. Koivisto, O. Tarvainen, T. Thuillier, V. Toivanen
Journal: Physics of Plasmas
Phys. Plasmas 30, 073904 (2023)
https://doi.org/10.1063/5.0150198
Published: July 2023
View articletitled, The effects of electron energy distribution and ionization cross section uncertainty on charge breeder ion source diagnostics with pulsed 1 + injection
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Journal Articles

Lost electron energy distribution of electron cyclotron resonance ion sources

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I. Izotov, V. Skalyga, O. Tarvainen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 93, 043501 (2022)
https://doi.org/10.1063/5.0075464
Published: April 2022
View articletitled, Lost electron energy distribution of electron cyclotron resonance ion sources
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Journal Articles

High power vacuum ultraviolet source based on gasdynamic ECR plasma

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R. L. Lapin, V. A. Skalyga, S. V. Golubev, I. V. Izotov, S. V. Razin, O. Tarvainen
Journal: Journal of Applied Physics
J. Appl. Phys. 131, 093301 (2022)
https://doi.org/10.1063/5.0074388
Published: March 2022
View articletitled, High power vacuum ultraviolet source based on gasdynamic ECR plasma
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Journal Articles

Quasi-periodical kinetic instabilities in minimum-B confined plasma

Open Access
B. S. Bhaskar, H. Koivisto, O. Tarvainen, T. Thuillier, V. Toivanen
Journal: AIP Advances
AIP Advances 12, 015223 (2022)
https://doi.org/10.1063/5.0070824
Published: January 2022
View articletitled, Quasi-periodical kinetic instabilities in minimum-B confined plasma
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Includes: Supplementary data
Journal Articles

Diagnostic techniques of minimum-B ECR ion source plasma instabilities

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V. Toivanen, B. S. Bhaskar, I. V. Izotov, H. Koivisto, O. Tarvainen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 93, 013302 (2022)
https://doi.org/10.1063/5.0075443
Published: January 2022
View articletitled, Diagnostic techniques of minimum-B ECR ion source plasma instabilities
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Journal Articles

Influence of axial mirror ratios on the kinetic instability threshold in electron cyclotron resonance ion source plasma

Editor’s PickAvailable to Purchase
V. Toivanen, B. S. Bhaskar, H. Koivisto, L. Maunoury, O. Tarvainen, T. Thuillier
Journal: Physics of Plasmas
Phys. Plasmas 29, 013501 (2022)
https://doi.org/10.1063/5.0069638
Published: January 2022
View articletitled, Influence of axial mirror ratios on the kinetic instability threshold in electron cyclotron resonance ion source plasma
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Journal Articles

H− ion source research and development at the Oak Ridge National Laboratory

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R. F. Welton, M. P. Stockli, B. X. Han, S. N. Murray, T. R. Pennisi, C. Stinson, A. Aleksandrov, C. Piller, Y. Kang, O. Tarvainen
Journal: AIP Conference Proceedings
AIP Conf. Proc. 2373, 070004 (2021)
https://doi.org/10.1063/5.0057549
Published: July 2021
View articletitled, H− ion source research and development at the Oak Ridge National Laboratory
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Journal Articles

Controlling the shape of the ISIS H− penning ion source beam pulse

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T. Sarmento, O. Tarvainen, R. Abel, S. Lawrie, J. Macgregor, C. Cahill, T. Wood, M. Whitehead, D. Adams, D. Faircloth
Journal: AIP Conference Proceedings
AIP Conf. Proc. 2373, 050001 (2021)
https://doi.org/10.1063/5.0057735
Published: July 2021
View articletitled, Controlling the shape of the ISIS H− penning ion source beam pulse
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Journal Articles

Experimental evidence on photo-assisted O− ion production from Al2O3 cathode in cesium sputter negative ion source

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O. Tarvainen, R. Kronholm, M. Laitinen, M. Reponen, J. Julin, V. Toivanen, M. Napari, M. Marttinen, D. Faircloth, H. Koivisto, T. Sajavaara
Journal: Journal of Applied Physics
J. Appl. Phys. 128, 094903 (2020)
https://doi.org/10.1063/5.0020751
Published: September 2020
View articletitled, Experimental evidence on photo-assisted O− ion production from Al2O3 cathode in cesium sputter negative ion source
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Journal Articles

ISIS Penning source extraction studies reveal the 3-dimensional Child–Langmuir effect

Open Access
D. Faircloth, O. Tarvainen, S. Lawrie, T. Sarmento, N. Savard, R. Abel, J. Macgregor, M. Whitehead, T. Wood, C. Cahill
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 043307 (2020)
https://doi.org/10.1063/1.5129675
Published: April 2020
View articletitled, ISIS Penning source extraction studies reveal the 3-dimensional Child–Langmuir effect
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Journal Articles

A new 18 GHz room temperature electron cyclotron resonance ion source for highly charged ion beams

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H. Koivisto, A. Ikonen, T. Kalvas, S. Kosonen, R. Kronholm, M. Marttinen, O. Tarvainen, V. Toivanen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 023303 (2020)
https://doi.org/10.1063/1.5128860
Published: February 2020
View articletitled, A new 18 GHz room temperature electron cyclotron resonance ion source for highly charged ion beams
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Journal Articles

Study of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency

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R. L. Lapin, V. A. Skalyga, I. Izotov, S. V. Razin, R. A. Shaposhnikov, S. S. Vybin, A. F. Bokhanov, M. Yu. Kazakov, O. Tarvainen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 013517 (2020)
https://doi.org/10.1063/1.5128313
Published: January 2020
View articletitled, Study of gasdynamic electron cyclotron resonance plasma vacuum ultraviolet emission to optimize negative hydrogen ion production efficiency
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Journal Articles

ECRIS plasma spectroscopy with a high resolution spectrometer

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R. Kronholm, T. Kalvas, H. Koivisto, S. Kosonen, M. Marttinen, D. Neben, M. Sakildien, O. Tarvainen, V. Toivanen
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 013318 (2020)
https://doi.org/10.1063/1.5128854
Published: January 2020
View articletitled, ECRIS plasma spectroscopy with a high resolution spectrometer
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Journal Articles

Estimating ion confinement times from beam current transients in conventional and charge breeder ECRIS

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M. Marttinen, J. Angot, A. Annaluru, P. Jardin, T. Kalvas, H. Koivisto, S. Kosonen, R. Kronholm, L. Maunoury, O. Tarvainen, V. Toivanen, P. Ujic
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 013304 (2020)
https://doi.org/10.1063/1.5128546
Published: January 2020
View articletitled, Estimating ion confinement times from beam current transients in conventional and charge breeder ECRIS
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Journal Articles

Measurements of the energy distribution of electrons lost from the minimum B-field—The effect of instabilities and two-frequency heating

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I. Izotov, O. Tarvainen, V. Skalyga, D. Mansfeld, H. Koivisto, R. Kronholm, V. Toivanen, V. Mironov
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 013502 (2020)
https://doi.org/10.1063/1.5128322
Published: January 2020
View articletitled, Measurements of the energy distribution of electrons lost from the minimum B-field—The effect of instabilities and two-frequency heating
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Journal Articles

The biased disc of an electron cyclotron resonance ion source as a probe of instability-induced electron and ion losses

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O. Tarvainen, R. Kronholm, T. Kalvas, H. Koivisto, I. Izotov, V. Skalyga, V. Toivanen, L. Maunoury
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 90, 123303 (2019)
https://doi.org/10.1063/1.5126935
Published: December 2019
View articletitled, The biased disc of an electron cyclotron resonance ion source as a probe of instability-induced electron and ion losses
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Journal Articles

Plasma diagnostic tools for ECR ion sources—What can we learn from these experiments for the next generation sources

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O. Tarvainen, T. Kalvas, H. Koivisto, R. Kronholm, M. Marttinen, M. Sakildien, V. Toivanen, I. Izotov, V. Skalyga, J. Angot
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 90, 113321 (2019)
https://doi.org/10.1063/1.5127050
Published: November 2019
View articletitled, Plasma diagnostic tools for ECR ion sources—What can we learn from these experiments for the next generation sources
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Journal Articles

Extending the pulse length of the ISIS H− Penning ion source

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O. Tarvainen, R. Abel, S. Lawrie, D. Faircloth, T. Sarmento, J. Macgregor, C. Cahill, M. Whitehead, T. Wood, N. Savard
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 90, 103311 (2019)
https://doi.org/10.1063/1.5126729
Published: October 2019
View articletitled, Extending the pulse length of the ISIS H− Penning ion source
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