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Title |
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| TUP13 |
Characterization of ECR Plasma by Means of Radial and Axial X-Ray Diagnostics |
111 |
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- R. Miracoli
ESS Bilbao, Zamudio, Spain
- G. Castro, L. Celona, S. Gammino, D. Mascali, M. Mazzaglia, E. Naselli, G. Torrisi
INFN/LNS, Catania, Italy
- E. Naselli
Catania University, Catania, Italy
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This work presents the X-ray characterization of the plasma generated in simple mirror axis symmetric trap as a function of magnetic field profile. A Si-Pin detector has been used to characterize warm electron population either in axial than in radial direction at two different operating frequencies: 4.1 GHz and 6.8 GHz. Moreover, the hot electrons emitted by axial direction has been measured by means of a HyperPure Germanium (HpGe) detector. Results show that X-ray emission is not homogenous and homogeneity and temperature depends strongly on the magnetic field profile.
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Poster TUP13 [1.422 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-ECRIS2018-TUP13
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| TUP25 |
Study of the Influence of Magnetic Field Profile on Plasma Parameters in a Simple Mirror Trap |
144 |
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- 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
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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.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-ECRIS2018-TUP25
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| WEA4 |
Time Resolved X-Ray Measurements in a Simple Mirror Trap |
162 |
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- S.T. Salvatore, C. Altana, G. Castro, L. Celona, S. Gammino, G.L. Lanzalone, G.L. Litrico, D. Mascali, M. Mazzaglia, A.M. Muoio, E. Naselli, G. Torrisi
INFN/LNS, Catania, Italy
- R. Miracoli
ESS Bilbao, Zamudio, Spain
- E. Naselli
Catania University, Catania, Italy
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The time-resolved characterization of the X-ray emission represents an innovative technique to investigate the heating mechanism of the worm/hot electron component in ECRIS devices. In this paper, the technique has been described and the results of an experimental campaign of measurements in order to characterize the X-rays emission of an axis-symmetric simple mirror trap has been showed. Particular attention has been paid to the ignition and turning off phase. This approach has permitted to estimate confinement time of the warm/hot electron population and put in evidence eventual instability effects during the critical phases. Further developments and perspectives of the technique will be highlighted.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-ECRIS2018-WEA4
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