Observation of Anomalous Ion Heating by Broadband Drift-Wave Turbulence

Journal Article · Fri Oct 22 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.175004· OSTI ID:21467040

Enge, S; Birkenmeier, G; Manz, P; Ramisch, M; Stroth, U ^[1]

---

1. Institut fuer Plasmaforschung, Universitaet Stuttgart, 70569 Stuttgart (Germany)

Using laser induced fluorescence and passive spectroscopy on a magnetically confined low-temperature plasma, anomalous ion heating is observed which exceeds collisional heating from the electrons by a factor of up to five. Direct wave heating due to the 2.45 GHz microwave as well as stochastic heating by large-amplitude fluctuations could be ruled out as explanations. Good quantitative agreement is found when comparing the missing power in the ion species with heating power due to the dissipation of drift-wave turbulence. This turbulent energy transfer into the ion channel could have important consequences for the interpretation of transport in fusion plasmas.

• OSTI ID: 21467040
• Journal Information: Physical Review Letters, Vol. 105, Issue 17; Other Information: DOI: 10.1103/PhysRevLett.105.175004; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHARGED-PARTICLE TRANSPORT
COLLISIONAL HEATING
ELECTRONS
EMISSION SPECTROSCOPY
ENERGY TRANSFER
FLUCTUATIONS
FLUORESCENCE
GHZ RANGE
IONS
LASERS
MAGNETIC CONFINEMENT
MICROWAVE RADIATION
PLASMA
PLASMA DRIFT
PLASMA WAVES
STOCHASTIC PROCESSES
TURBULENCE
WAVE PROPAGATION
CHARGED PARTICLES
CONFINEMENT
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EMISSION
FERMIONS
FREQUENCY RANGE
HEATING
HIGH-FREQUENCY HEATING
LEPTONS
LUMINESCENCE
MAGNETIC-PUMPING HEATING
PHOTON EMISSION
PLASMA CONFINEMENT
PLASMA HEATING
RADIATION TRANSPORT
RADIATIONS
SPECTROSCOPY
VARIATIONS