Observations of Alfvénic-character oscillations in ohmic plasmas on the COMPASS tokamak.

Markovič, Tomáš; Melnikov, A.; Seidl, Jakub; Eliseev, L.; Havlíček, Josef; Havránek, Aleš; Hron, Martin; Imríšek, Martin; Kovařík, Karel; Medvedev, S.; Bogár, Klára; Mlynář, Jan; Naydenkova, Diana; Pánek, Radomír; Stöckel, Jan; Varju, Jozef; Weinzettl, Vladimír

Number of the records: 1

Observations of Alfvénic-character oscillations in ohmic plasmas on the COMPASS tokamak.

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SYSNO ASEP	0482689
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Observations of Alfvénic-character oscillations in ohmic plasmas on the COMPASS tokamak.
Author(s)	Markovič, Tomáš (UFP-V)_RID Melnikov, A. (RU) Seidl, Jakub (UFP-V)_RID Eliseev, L. (RU) Havlíček, Josef (UFP-V)_{RID, ORCID} Havránek, Aleš (UFP-V)_ORCID Hron, Martin (UFP-V)_{RID, ORCID} Imríšek, Martin (UFP-V)_RID Kovařík, Karel (UFP-V)_{RID, ORCID} Medvedev, S. (RU) Bogár, Klára (UFP-V)_ORCID Mlynář, Jan (UFP-V)_RID Naydenkova, Diana (UFP-V)_{RID, ORCID} Pánek, Radomír (UFP-V)_RID Stöckel, Jan (UFP-V)_RID Varju, Jozef (UFP-V)_ORCID Weinzettl, Vladimír (UFP-V)_{RID, ORCID}
Article number	P5.005
Source Title	EPS 2017: 44th European Physical Society Conference on Plasma Physics, 41F. - Mulhouse : European Physical Society, 2017 / Fajardo M. ; Westerhof E. ; Riconda C. ; Melzer A. ; Bret A. ; Dromey B. - ISBN 979-10-96389-07
Number of pages	4 s.
Publication form	Online - E
Action	EPS 2017 Conference on Plasma Physics/44./
Event date	26.06.2017 - 30.06.2017
VEvent location	Belfast
Country	IE - Ireland
Event type	EUR
Language	eng - English
Country	FR - France
Keywords	Alfvén Eigenmode ; Magnetic Confinement Fusion ; MHD
Subject RIV	BL - Plasma and Gas Discharge Physics
OECD category	Fluids and plasma physics (including surface physics)
R&D Projects	GA16-25074S GA ČR - Czech Science Foundation (CSF)
	8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFP-V - RVO:61389021
Annotation	In plasma magnetic confinement devices, a significant presence of superthermal Energetic Particles (EP) (e.g. from auxiliary plasma heating systems) can drive instabilities via resonance of particle velocity with plasma Alfvén velocity, which can in turn negatively affect the EP confinement. However, there have been reports of plasma Alfvén eigenmode oscillations in purely ohmically-heated plasmas on several experimental devices. In this paper we report observation of similar Alfvén eigenmode oscillations in ohmically heated plasmas on the COMPASS tokamak and classify them with respect to the reports from other devices from the perspective of mode frequency scaling, localization and possible excitation mechanisms.
Workplace	Institute of Plasma Physics
Contact	Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975
Year of Publishing	2018

Number of the records: 1