Electron energy distribution function, plasma potential and electron density measured by Langmuir probe in tokamak edge plasma

Popov, Tsv K; Ivanova, P. K.; Ştöckel, J.; Dejarnac, R.

doi:10.1088/0741-3335/51/6/065014

Cited by 43 publications

(57 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An elevated non-Maxwellian tail into the plate results in an overestimate of the temperature estimation by divertor Langmuir probes by a factor of 2-6, using classical probe techniques [10,14].…”

Section: Contribution To the Mainstream Fusion Researchmentioning

confidence: 99%

See 1 more Smart Citation

Contribution to fusion research from IAEA coordinated research projects and joint experiments

et al. 2015

View full text Add to dashboard Cite

The paper presents objectives and activities of IAEA Coordinated Research Projects 'Conceptual development of steady-state compact fusion neutron sources' and 'Utilisation of a network of small magnetic confinement fusion devices for mainstream fusion research'. The background and main projects of the CRP on FNS are described in detail, as this is a new activity at IAEA. Recent activities of the second CRP, which continues activities of previous CRPs, are overviewed.

show abstract

Section: Contribution To the Mainstream Fusion Researchmentioning

confidence: 99%

“…Figure 4 shows results of measurements of the EEDF obtained using first-derivative method [10] during JE on CASTOR tokamak, IPP Prague. It clearly shows the bi-Maxwellian nature of the EEDF.…”

Section: Contribution To the Mainstream Fusion Researchmentioning

confidence: 99%

Contribution to fusion research from IAEA coordinated research projects and joint experiments

et al. 2015

View full text Add to dashboard Cite

show abstract

“…In order to address the I-V characteristic in the region beyond the floating potential, a more comprehensive probe theory is sought. In certain circumstances, it can be shown that the non-local approach is usable [12,23,24,25].…”

Section: Theorymentioning

confidence: 99%

“…In the case of a magnetized plasma, the diffusion parameter is given as follows for a perpendicularly oriented probe [12,26]:…”

Section: Theorymentioning

confidence: 99%

“…It is possible to formulate a theory describing the electron current channel based on transport arguments [10] although such theories have been criticized [9] due to reliance on anomalous cross-field transport terms. At present, the consensus is that the region of an I-V characteristic below floating potential can be utilized for the determination of a plasma electron temperature [11] This is referred to as the "classical" interpretation [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modification Of The Electron Energy Distribution Function During Lithium Experiments On The National Spherical Torus Experiment

Jaworski¹,

Gray²,

Kaita³

et al. 2011

View full text Add to dashboard Cite

The National Spherical Torus Experiment (NSTX) has recently studied the use of a liquid lithium divertor (LLD). Divertor Langmuir probes have also been installed for making measurements of the local plasma conditions. A non-local probe interpretation method is used to supplement the classical probe interpretation and obtain measurements of the electron energy distribution function (EEDF) which show the occurrence of a hot-electron component. Analysis is made of two discharges within a sequence that exhibited changes in plasma fueling efficiency. It is found that the local electron temperature increases and that this increase is most strongly correlated with the energy contained within the hot-electron population. Preliminary in- scrape-off layer (SOL) plasma. The decrease in plasma fueling efficiency, increase in local temperature, and increase in hot-electron fraction are all consistent with an absorbing surface intercepting the SOL plasma.

show abstract

Plasma Parameters in the COMPASS Divertor During Ohmic Plasmas

Dimitrova

Dejarnac

Popov

et al. 2014

Contrib. Plasma Phys.

View full text Add to dashboard Cite

This paper reports on probe measurements of the electron energy distribution function and plasma potential in the divertor region of the COMPASS tokamak during D‐shaped plasmas. The probe data have been processed using the novel first‐derivative technique. A comparison with the results obtained by processing the same data with the classical probe technique, which assumes Maxwellian electron energy distribution functions is presented and discussed. In the vicinity of the inner and outer strike points of the divertor the electron energy distribution function can be approximated by a bi‐Maxwellian, with a dominating low‐energy electron population (4‐7 eV) and a minority of higher energy electrons (12‐25 eV). In the private flux region between the two strike points the electron energy distribution function is found to be Maxwellian with temperatures in the range of 7‐10 eV. The comparative analysis using both techniques has allowed a better insight into the underlying physical processes at the divertor region of the COMPASS tokamak. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Electron energy distribution function, plasma potential and electron density measured by Langmuir probe in tokamak edge plasma

Cited by 43 publications

References 22 publications

Contribution to fusion research from IAEA coordinated research projects and joint experiments

Contribution to fusion research from IAEA coordinated research projects and joint experiments

Modification Of The Electron Energy Distribution Function During Lithium Experiments On The National Spherical Torus Experiment

Plasma Parameters in the COMPASS Divertor During Ohmic Plasmas

Contact Info

Product

Resources

About