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http://dx.doi.org/10.1103/physreva.45.5957 | DOI Listing |
Space Sci Rev
May 2024
NASA, Goddard Space Flight Center, Greenbelt, 20771 MD USA.
Phys Rev E
November 2022
INFN-LNS, Via S. Sofia 62, 95123, Catania, Italy.
We establish multicomponent 1+ injection into a charge breeder electron cyclotron resonance ion source and an associated computational procedure as a noninvasive probe of the electron density n_{e}, average electron energy 〈E_{e}〉, and the characteristic times of ionization, charge exchange, and ion confinement of stochastically heated, highly charged plasma. Multicomponent injection allows refining the n_{e}, 〈E_{e}〉 ranges, reducing experimental uncertainty. Na/K injection is presented as a demonstration.
View Article and Find Full Text PDFRev Sci Instrum
March 2022
Argonne National Laboratory, 9700 South Cass Ave., Lemont, Illinois 60439, USA.
The development of new facilities routinely challenges ion source designers to build and operate sources that can achieve ever higher beam intensities and energies. Electron cyclotron resonance ion sources have proven to be extremely capable in meeting these challenges through the production of intense beams of medium and high-charge state ions. As performance boundaries are pushed, source stability becomes an issue as does the technology required to meet the challenge.
View Article and Find Full Text PDFUnderstanding the energization processes and constituent composition of the plasma and energetic particles injected into the near-Earth region from the tail is an important component of understanding magnetospheric dynamics. In this study, we present multiple case studies of the high-energy (≳40 keV) suprathermal ion populations during energetic particle enhancement events observed by the Energetic Ion Spectrometer (EIS) on NASA's Magnetospheric Multiscale (MMS) mission in the magnetotail. We present results from correlation analysis of the flux response between different energy channels of different ion species (hydrogen, helium, and oxygen) for multiple cases.
View Article and Find Full Text PDFRev Sci Instrum
February 2020
National Superconduction Cyclotron Laboratory, East Lansing, Michigan 48824, USA.
Production of high charge state ions in electron cyclotron resonance ion sources (ECRISs) is dependent on the electron energy distribution (EED) within the source plasma. In order to better understand the EED, a measurement of electrons escaping axially from an ECRIS device has been performed at the National Superconducting Cyclotron Laboratory. Electrons were measured escaping from the Superconducting Source for Ions, driven at 18 GHz.
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