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List of works by Hannu Koivisto

3D-simulation studies of the modified magnetic multipole structure for an electron cyclotron resonance ion source

scientific article

A Novel Approach to β-Decay: PANDORA, a New Experimental Setup for Future In-Plasma Measurements

A modified permanent magnet structure for a stronger multipole magnetic field

scientific article

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

scientific article published on 01 February 2020

A new plasma potential measurement instrument for plasma ion sources

scientific article

A status report of the multipurpose superconducting electron cyclotron resonance ion source

scientific article published on 01 February 2008

A study of VUV emission and the extracted electron-ion ratio in hydrogen and deuterium plasmas of a filament-driven H−/D− ion source

scientific article

Alpha-particle capture reactions in inverse kinematics relevant to p-process nucleosynthesis

Application and development of ion-source technology for radiation-effects testing of electronics

scientific article

Beam current oscillations driven by cyclotron instabilities in a minimum-Belectron cyclotron resonance ion source plasma

scientific article

Breakdown transient study of plasma distributions in a 2.45 GHz hydrogen discharge

scientific article

Broadband microwave emission spectrum associated with kinetic instabilities in minimum-B ECR plasmas

scientific article

Charge breeding at GANIL: Improvements, results, and comparison with the other facilities

scientific article published on 01 February 2020

Controlled turbulence regime of electron cyclotron resonance ion source for improved multicharged ion performance

scientific article

Cooling of the plasma chamber for the AECR-U type electron cyclotron resonance ion source ARTEMIS

scientific article

Correlation of bremsstrahlung and energy distribution of escaping electrons to study the dynamics of magnetically confined plasma

scientific article

Correlations between density distributions, optical spectra, and ion species in a hydrogen plasma (invited).

scientific article published in February 2016

Cyclotron instability in the afterglow mode of minimum-B ECRIS.

scientific article published in February 2016

Design of a 10 GHz minimum-B quadrupole permanent magnet electron cyclotron resonance ion source

scientific article

Diagnostics of a charge breeder electron cyclotron resonance ion source helium plasma with the injection ofNa231+ions

Double einzel lens extraction for the JYFL 14 GHz ECR ion source designed with IBSimu

scientific article

Dynamic regimes of cyclotron instability in the afterglow mode of minimum-Belectron cyclotron resonance ion source plasma

scientific article

E-sail test payload of the ESTCube-1 nanosatellite

ECRIS plasma spectroscopy with a high resolution spectrometer

scientific article published on 01 January 2020

ESTCube-1 nanosatellite for electric solar wind sail in-orbit technology demonstration

Effect of Ion Escape Velocity and Conversion Surface Material on H[sup −] Production

scientific article

Effects of magnetic configuration on hot electrons in a minimum-B ECR plasma

scientific article

Electron Cyclotron Resonance Ion Sources for Highly-Charged Ion Beams

scientific article

Electron cyclotron resonance ion source plasma chamber studies using a network analyzer as a loaded cavity probe

scientific article published on 01 February 2012

Electron cyclotron resonance ion sources – physics, technology and future challenges

scientific article

Electron heating with broadband microwave radiation: A new method for improving the performances of conventional B-minimum electron cyclotron resonance ion sources

scientific article

Electron–cyclotron–resonance plasma heating with broadband microwave radiation: Anomalous effects

scientific article

Erratum: “Effect of electron cyclotron resonance ion source frequency tuning on ion beam intensity and quality at Department of Physics, University of Jyväskylä” [Rev. Sci. Instrum. 81, 02A319 (2010)]

scientific article

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

scientific article published on 01 January 2020

Experimental evidence of E × B plasma rotation in a 2.45 GHz hydrogen discharge

scientific article

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

scientific article

Experimental study of hydrogen plasma breakdown in a 2.45 GHz microwave discharge

scientific article

First intense isotopic titanium-50 beam using MIVOC method

scientific article

First results with a modified multipole structure electron cyclotron resonance ion source

scientific article

Gyrotron-driven high current ECR ion source for boron-neutron capture therapy neutron generator

scientific article

High current proton beams production at Simple Mirror Ion Source 37.

scientific article published in February 2014

High current proton source based on ECR discharge sustained by 37.5 GHz gyrotron radiation

scientific article

High yield neutron generator based on a high-current gasdynamic electron cyclotron resonance ion source

scientific article

Hybrid simulation of electron cyclotron resonance heating

scientific article

Hydrogen plasma induced photoelectron emission from low work function cesium covered metal surfaces

scientific article

Injected 1+ ion beam as a diagnostics tool of charge breeder ECR ion source plasmas

Inner shell ionization of argon in ECRIS plasma

scientific article

Investigation into the gas mixing effect in ECRIS plasma using Kα and optical diagnostics

scientific article

Investigations into the alpha-decay of 195At

scientific article

Invited article: Electric solar wind sail: toward test missions

scientific article

Ion beam development for the needs of the JYFL nuclear physics programme.

scientific article published in February 2008

Ion source research and development at University of Jyväskylä: Studies of different plasma processes and towards the higher beam intensities

scientific article

Ionization efficiency studies with charge breeder and conventional electron cyclotron resonance ion source

scientific article published on 01 February 2014

Kinetic instabilities in pulsed operation mode of a 14 GHz electron cyclotron resonance ion source

Limitation of the ECRIS performance by kinetic plasma instabilities (invited)

Limitations of electron cyclotron resonance ion source performances set by kinetic plasma instabilities

scientific article published on 01 February 2015

Measurement of the energy distribution of electrons escaping minimum-B ECR plasmas

scientific article

Measurement of the high energy component of the x-ray spectra in the VENUS electron cyclotron resonance ion source

scientific article published on 01 March 2008

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

scientific article published on 01 January 2020

Method for estimating charge breeder ECR ion source plasma parameters with short pulse 1+ injection of metal ions

scientific article

Microwave emission from ECR plasmas under conditions of two-frequency heating induced by kinetic instabilities

scientific article

Microwave emission related to cyclotron instabilities in a minimum-Belectron cyclotron resonance ion source plasma

scientific article

Nano-graphite cold cathodes for electric solar wind sail

scholarly article in Carbon, vol. 81, January 2015

Neutron generator for BNCT based on high current ECR ion source with gyrotron plasma heating.

scientific article published on 17 August 2015

New progress of high current gasdynamic ion source (invited).

scientific article published in February 2016

Optical emission spectroscopy of the Linac4 and superconducting proton Linac plasma generators

scientific article published on 01 February 2012

Optimizing charge breeding techniques for ISOL facilities in Europe: Conclusions from the EMILIE project

scientific article

Oscillations of ECR ion source beam current along the beam transport of the JYFL K-130 cyclotron

scientific article

Photo-assisted O− and Al− production with a cesium sputter ion source

scientific article

Photoelectron emission experiments with ECR-driven multi-dipolar negative ion plasma source

scientific article

Photoelectron emission from metal surfaces induced by radiation emitted by a 14 GHz electron cyclotron resonance ion source

scientific article

Photoelectron emission induced by low temperature hydrogen plasmas

scientific article

Plasma breakdown diagnostics with the biased disc of electron cyclotron resonance ion source

scientific article

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

scientific article published on 01 November 2019

Plasma distributions observed in a 2.45 GHz hydrogen discharge

scientific article

Plasma instabilities of a charge breeder ECRIS

scientific article

Plasma instability in the afterglow of electron cyclotron resonance discharge sustained in a mirror trap

Plasma response to amplitude modulation of the microwave power on a 14 GHz electron cyclotron resonance ion source

scientific article

Power efficiency improvements with the radio frequency H⁻ ion source

scientific article published in February 2016

Prospects for advanced electron cyclotron resonance and electron beam ion source charge breeding methods for EURISOL

scientific article published on 01 February 2012

Recent negative ion source activity at JYFL

Reduction of the carbon contamination of an electron cyclotron resonance ion source

scientific article

Shape coexistence at the proton drip-line: First identification of excited states inPb180

scholarly article

Spectroscopic method to study low charge state ion and cold electron population in ECRIS plasma

scientific article published on 01 April 2018

Spectroscopic study of ion temperature in minimum-B ECRIS plasma

scientific article

Status of new 18 GHz ECRIS HIISI

scientific article

Studies of plasma breakdown and electron heating on a 14 GHz ECR ion source through measurement of plasma bremsstrahlung

Studying the double-frequency heating mode in ECRIS plasma using Kα diagnostics

scientific article

Superconductivity suppression in Fe-implanted thin Al films

scientific article

Suppression of cyclotron instability in Electron Cyclotron Resonance ion sources by two-frequency heating

scientific article

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

scientific article published on 01 December 2019

The effect of cavity tuning on oxygen beam currents of an A-ECR type 14 GHz electron cyclotron resonance ion source

scientific article published on 01 September 2016

The effect of gas mixing and biased disc voltage on the preglow transient of electron cyclotron resonance ion source

scientific article published in February 2012

The effect of magnetic field strength on the time evolution of high energy bremsstrahlung radiation created by an electron cyclotron resonance ion source

scientific article

The effect of microwave power on the Ar9+ and Ar13+ optical emission intensities and ion beam currents in ECRIS

scientific article

The effect of plasma electrode collar structure on the performance of the JYFL 14GHz electron cyclotron resonance ion source

scientific article

The effect of plasma instabilities on the background impurities in charge breeder ECRIS

scientific article

The effects of beam line pressure on the beam quality of an electron cyclotron resonance ion source

scientific article

The effects of gas mixing and plasma electrode position on the emittance of an electron cyclotron resonance ion source

scientific article

The electron cyclotron resonance ion source with arc-shaped coils concept (invited)

scientific article published on 01 February 2012

The first results with the new JYFL 14 GHz ECR ion source

The relationship between visible light emission and species fraction of the hydrogen ion beams extracted from 2.45 GHz microwave discharge

scientific article published in August 2015

The role of radio frequency scattering in high-energy electron losses from minimum-B ECR ion source

scientific article

The role of seed electrons on the plasma breakdown and preglow of electron cyclotron resonance ion source

scientific article published in February 2010

Time resolved measurements of hydrogen ion energy distributions in a pulsed 2.45 GHz microwave plasma

scientific article

Transverse distribution of beam current oscillations of a 14 GHz electron cyclotron resonance ion source.

scientific article published in February 2014

Ultra-fast intensified frame images from an electron cyclotron resonance hydrogen plasma at 2.45 GHz: some space distributions of visible and monochromatic emissions

scientific article published on 01 February 2014

VUV irradiance measurement of a 2.45 GHz microwave-driven hydrogen discharge

scientific article

VUV-diagnostics of a filament-driven arc discharge H− ion source

scientific article

Workshop on performance variations in H− ion sources 2012: PV H−12

scientific article

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