A4 Artikkeli konferenssijulkaisussa
Time-resolved measurement of optical emission line profiles from electron cyclotron resonance ion source plasma (2024)

Timonen, O., Koivisto, H., Kronholm, R., & Toivanen, V. (2024). Time-resolved measurement of optical emission line profiles from electron cyclotron resonance ion source plasma. In 20th International Conference on Ion Sources (Article 012008). IOP Publishing. Journal of Physics : Conference Series, 2743. https://doi.org/10.1088/1742-6596/2743/1/012008

JYU-tekijät tai -toimittajat

Timonen, Oskari
Koivisto, Hannu
Kronholm, Risto
Toivanen, Ville

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Timonen, Oskari; Koivisto, Hannu; Kronholm, Risto; Toivanen, Ville

Emojulkaisu: 20th International Conference on Ion Sources

Konferenssi:

Konferenssin paikka ja aika: Victoria, BC, Canada, 17.-22.9.2023

Lehti tai sarja: Journal of Physics : Conference Series

ISSN: 1742-6588

eISSN: 1742-6596

Julkaisuvuosi: 2024

Ilmestymispäivä: 01.05.2024

Sarjan numero: 2743

Artikkelinumero: 012008

Kustantaja: IOP Publishing

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1088/1742-6596/2743/1/012008

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/95129

Tiivistelmä

Optical emission spectroscopy provides a non-invasive method to probe the properties of hot and highly charged magnetically confined plasmas. The optical emission line profiles enable, for example, to identify the different species and characterize the relative population densities and temperatures of the ions and neutrals forming the plasma. The feasibility of this approach has been demonstrated at the University of Jyväskylä accelerator laboratory by measuring the light emitted by Electron Cyclotron Resonance Ion Source (ECRIS) plasma with a high-resolution spectrometer setup POSSU (Plasma Optical SpectroScopy Unit). In these previous studies, the emission line profiles were measured by scanning the desired wavelength range by rotating the diffraction grating of the spectrometer. This process is slow compared to many interesting plasma phenomena, thus limiting the applicability of the setup. Recently, POSSU has been upgraded by changing the light sensor from a photomultiplier tube to a position-sensitive imaging sensor. As a result, it is possible to measure simultaneously a 1 - 2 nm wavelength range, with a spectral resolution in the order of picometers, without moving the grating. This enables a time-resolved study of the optical emission line profiles. By turning the grating, the measured wavelength region can be chosen between 370 nm and 870 nm, which covers the visible light spectrum. The time-evolution of optical emission line profiles emitted from the JYFL 14 GHz ECRIS plasma, during shifting plasma conditions induced by changing the gas balance, has been measured to demonstrate this new capability. The time-evolution of temperatures and emission intensities of selected ion species, correlated with extracted ion beam currents, are presented.

YSO-asiasanat: plasmafysiikka; syklotronit

Liittyvät organisaatiot

Hankkeet, joissa julkaisu on tehty

OKM-raportointi: Kyllä

Alustava JUFO-taso: 1