ECRIS2018 - List of Authors (Reitano, R.)

Paper	Title	Page
TUP12	Results of the Optical Emission Spectroscopy diagnostics of the ESS proton source	107
	G. Castro, L. Celona, S. Gammino, O. Leonardi, D. Mascali, M. Mazzaglia, A. Miraglia, E. Naselli, L. Neri, R. Reitano, G. Torrisi INFN/LNS, Catania, Italy E. Naselli Catania University, Catania, Italy R. Reitano Università degli Studi di Catania, Catania, Italy
	The high intensity proton source for the European Spallation Source, designed and commissioned at INFN-LNS, is able to produce a stable total current between 40 and 125 mA through an 8 mm extraction aperture, with a proton fraction up to 87%. The best source condition for PS-ESS requirements has been investigated by means of the Optical Emission Spectroscopy (OES). OES has permitted to evaluate simultaneously the H/H2 relative abundances together with electron density and temperature. Results demonstrated that high intensity proton beams are generated in overdense plasma conditions (around 10¹⁸ m^-3 electron density measured by OES), while electron temperature shows a decreasing trend with power. The results will be discussed and compared with Faraday-cup and Doppler shift measurements. Further upgrades of OES diagnostics will be highlighted.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2018-TUP12
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TUP25	Study of the Influence of Magnetic Field Profile on Plasma Parameters in a Simple Mirror Trap	144
	M. Mazzaglia, G. Castro, L. Celona, S. Gammino, D. Mascali, E. Naselli, R. Reitano, G. Torrisi INFN/LNS, Catania, Italy R. Miracoli ESS Bilbao, Zamudio, Spain E. Naselli Catania University, Catania, Italy R. Reitano Università degli Studi di Catania, Catania, Italy S.B. Stefan, U.F. Ursel MPI/IPP, Garching, Germany
	This work presents the multiple diagnostics characterization of the plasma in an axis-symmetric simple mirror trap as a function of magnetic field profile (mirror ratios and magnetic field gradient), neutral gas pressure and microwave power. The simultaneous use of Optical Emission Spectroscopy, Langmuir Probe and X-ray diagnostics allows the characterization of the whole electron energy distribution function (EEDF), from a few eV to hundreds of keV. Results show non-linear behaviours under small variations of even one source parameter and strong influence of EEDF on the Bmin/BECR ratio. Benefit and next developments will be highlighted.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2018-TUP25
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Results of the Optical Emission Spectroscopy diagnostics of the ESS proton source

107

G. Castro, L. Celona, S. Gammino, O. Leonardi, D. Mascali, M. Mazzaglia, A. Miraglia, E. Naselli, L. Neri, R. Reitano, G. Torrisi
INFN/LNS, Catania, Italy
E. Naselli
Catania University, Catania, Italy
R. Reitano
Università degli Studi di Catania, Catania, Italy

The high intensity proton source for the European Spallation Source, designed and commissioned at INFN-LNS, is able to produce a stable total current between 40 and 125 mA through an 8 mm extraction aperture, with a proton fraction up to 87%. The best source condition for PS-ESS requirements has been investigated by means of the Optical Emission Spectroscopy (OES). OES has permitted to evaluate simultaneously the H/H2 relative abundances together with electron density and temperature. Results demonstrated that high intensity proton beams are generated in overdense plasma conditions (around 10¹⁸ m^-3 electron density measured by OES), while electron temperature shows a decreasing trend with power. The results will be discussed and compared with Faraday-cup and Doppler shift measurements. Further upgrades of OES diagnostics will be highlighted.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2018-TUP12

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP25

Study of the Influence of Magnetic Field Profile on Plasma Parameters in a Simple Mirror Trap

144

M. Mazzaglia, G. Castro, L. Celona, S. Gammino, D. Mascali, E. Naselli, R. Reitano, G. Torrisi
INFN/LNS, Catania, Italy
R. Miracoli
ESS Bilbao, Zamudio, Spain
E. Naselli
Catania University, Catania, Italy
R. Reitano
Università degli Studi di Catania, Catania, Italy
S.B. Stefan, U.F. Ursel
MPI/IPP, Garching, Germany

This work presents the multiple diagnostics characterization of the plasma in an axis-symmetric simple mirror trap as a function of magnetic field profile (mirror ratios and magnetic field gradient), neutral gas pressure and microwave power. The simultaneous use of Optical Emission Spectroscopy, Langmuir Probe and X-ray diagnostics allows the characterization of the whole electron energy distribution function (EEDF), from a few eV to hundreds of keV. Results show non-linear behaviours under small variations of even one source parameter and strong influence of EEDF on the Bmin/BECR ratio. Benefit and next developments will be highlighted.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2018-TUP25

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)