Uittreksel
Radial profiles of bulk ion and impurity ions density are simultaneously measured and quantified using charge exchange spectroscopy and peaking parameter, Cv. The peaking parameter is positive for inward and negative for outward convection in a plasma with an impurity hole in the Large Helical Device. Following the formation of an impurity hole associated with the transition from L-mode to ion ITB plasma, the bulk ion becomes peaked by the inward convection (Cv>0), while impurities (helium and carbon) become hollow due to the outward convection (Cv<0). In contrast to the ion ITB plasma, in the L-mode plasma the impurity profiles are peaked (Cv>0), where the bulk ion density profile remains flat (Cv∼0). Understanding of the impurity behavior in the ion ITB plasma could lead to a self cleaning plasma reactor concept, with an efficient impurity exhaust.
| Originele taal-2 | Engels |
|---|---|
| Artikelnummer | 076040 |
| Tijdschrift | Nuclear Fusion |
| Volume | 57 |
| Nummer van het tijdschrift | 7 |
| DOI's | |
| Status | Gepubliceerd - 7 jun 2017 |
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Observation of the bulk ion density peaking in a discharge with an impurity hole in the LHD. / Perek, A.; Ida, K.; Yoshinuma, M.; Goto, M.; Nakamura, Y.; Emoto, M.; Jaspers, R.
In: Nuclear Fusion, Vol. 57, Nr. 7, 076040, 07.06.2017.Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review
TY - JOUR
T1 - Observation of the bulk ion density peaking in a discharge with an impurity hole in the LHD
AU - Perek, A.
AU - Ida, K.
AU - Yoshinuma, M.
AU - Goto, M.
AU - Nakamura, Y.
AU - Emoto, M.
AU - Jaspers, R.
PY - 2017/6/7
Y1 - 2017/6/7
N2 - Radial profiles of bulk ion and impurity ions density are simultaneously measured and quantified using charge exchange spectroscopy and peaking parameter, Cv. The peaking parameter is positive for inward and negative for outward convection in a plasma with an impurity hole in the Large Helical Device. Following the formation of an impurity hole associated with the transition from L-mode to ion ITB plasma, the bulk ion becomes peaked by the inward convection (Cv>0), while impurities (helium and carbon) become hollow due to the outward convection (Cv<0). In contrast to the ion ITB plasma, in the L-mode plasma the impurity profiles are peaked (Cv>0), where the bulk ion density profile remains flat (Cv∼0). Understanding of the impurity behavior in the ion ITB plasma could lead to a self cleaning plasma reactor concept, with an efficient impurity exhaust.
AB - Radial profiles of bulk ion and impurity ions density are simultaneously measured and quantified using charge exchange spectroscopy and peaking parameter, Cv. The peaking parameter is positive for inward and negative for outward convection in a plasma with an impurity hole in the Large Helical Device. Following the formation of an impurity hole associated with the transition from L-mode to ion ITB plasma, the bulk ion becomes peaked by the inward convection (Cv>0), while impurities (helium and carbon) become hollow due to the outward convection (Cv<0). In contrast to the ion ITB plasma, in the L-mode plasma the impurity profiles are peaked (Cv>0), where the bulk ion density profile remains flat (Cv∼0). Understanding of the impurity behavior in the ion ITB plasma could lead to a self cleaning plasma reactor concept, with an efficient impurity exhaust.
KW - charge exchange spectroscopy
KW - helium exhaust
KW - impurity hole
KW - impurity transport
KW - LHD
UR - http://www.scopus.com/inward/record.url?scp=85020539815&partnerID=8YFLogxK
U2 - 10.1088/1741-4326/aa6c51
DO - 10.1088/1741-4326/aa6c51
M3 - Article
AN - SCOPUS:85020539815
VL - 57
JO - Nuclear Fusion
JF - Nuclear Fusion
SN - 0029-5515
IS - 7
M1 - 076040
ER -