Alfvén-character oscillations in ohmic plasmas observed on the COMPASS tokamak.

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

Number of the records: 1

Alfvén-character oscillations in ohmic plasmas observed on the COMPASS tokamak.

1.

SYSNO ASEP	0482820
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	Conference Paper
Title	Alfvén-character oscillations in ohmic plasmas observed 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} Bogár, Klára (UFP-V)_ORCID Mlynář, Jan (UFP-V)_RID Pánek, Radomír (UFP-V)_RID Stöckel, Jan (UFP-V)_RID Varju, Jozef (UFP-V)_ORCID Weinzettl, Vladimír (UFP-V)_{RID, ORCID}
Article number	P5.140
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	tokamak ; COMPASS
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	Energetic Particle driven plasma modes resulting from interaction of shear Alfvén waves with fast ions generated by fusion reactions, NBI or ICRH heating are capable of causing fast particle losses, negatively affecting the plasma performance or having detrimental effects on plasma-facing components or vacuum vessel. A number of reviews has already been published, describing properties of EP modes, their appearance, excitation and damping mechanisms, etc. The modes are not expected to appear in ohmic plasmas, however, plasma oscillations with their typical signatures have been reported in plasmas without an apparent source of EP on a number of devices. While impact of these phenomena on plasma performance does not seem to be significant, their investigation will yield understanding of the underlying EP mode physics. An observation of two types of such instabilities in ohmic régime plasmas on the COMPASS tokamak is reported and the modes characterised.
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