TY - GEN
T1 - Expanded capability of the edge charge-exchange recombination spectroscopy system on JET
AU - Biewer, T. M.
AU - Andrew, Y.
AU - Crombe, K.
AU - Hawkes, N. C.
AU - Hillis, D. L.
AU - Strege, C.
AU - Zastrow, K. D.
PY - 2008
Y1 - 2008
N2 - A new instrument has been added to the Joint European Torus (JET) edge charge-exchange recombination spectroscopy (CXRS) suite of diagnostics. The new instrument consists of a short focal length spectrometer coupled to a fast framing CCD camera. With the addition of this instrument, the number of (predominantly poloidal) sightlines is increased by 20 to a total of 58 views. The radial range of the edge CXRS system extends from r/a ∼ 0.5 to ∼ 1.0. The time resolution of this instrument is 10 ms, but can be improved to 5 ms. This instrument observes the neutral-beam induced charge-exchange emission of C VI at 529 nm and of Ne X at 524 nm simultaneously, complementing the existing edge CXRS instruments, which can be tuned to observe any visible wavelength of interest. The entire edge CXRS diagnostic suite has been absolutely calibrated and provides measurements of impurity ion temperatures as well as the toroidal and poloidal components of impurity ion rotation. An overview of the edge CXRS diagnostic system on JET will be presented. Preliminary data will be shown from the current JET campaign. In particular, the temporal and spatial improvements afforded by this instrument will provide additional data during the formation of ion internal transport barriers (ITBs) in JET, especially on the relative timing and location of emerging rational-q flux surfaces and poloidal flow spin up.
AB - A new instrument has been added to the Joint European Torus (JET) edge charge-exchange recombination spectroscopy (CXRS) suite of diagnostics. The new instrument consists of a short focal length spectrometer coupled to a fast framing CCD camera. With the addition of this instrument, the number of (predominantly poloidal) sightlines is increased by 20 to a total of 58 views. The radial range of the edge CXRS system extends from r/a ∼ 0.5 to ∼ 1.0. The time resolution of this instrument is 10 ms, but can be improved to 5 ms. This instrument observes the neutral-beam induced charge-exchange emission of C VI at 529 nm and of Ne X at 524 nm simultaneously, complementing the existing edge CXRS instruments, which can be tuned to observe any visible wavelength of interest. The entire edge CXRS diagnostic suite has been absolutely calibrated and provides measurements of impurity ion temperatures as well as the toroidal and poloidal components of impurity ion rotation. An overview of the edge CXRS diagnostic system on JET will be presented. Preliminary data will be shown from the current JET campaign. In particular, the temporal and spatial improvements afforded by this instrument will provide additional data during the formation of ion internal transport barriers (ITBs) in JET, especially on the relative timing and location of emerging rational-q flux surfaces and poloidal flow spin up.
UR - http://www.scopus.com/inward/record.url?scp=84873020284&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84873020284
SN - 9781622763351
T3 - 35th EPS Conference on Plasma Physics 2008, EPS 2008 - Europhysics Conference Abstracts
SP - 1606
EP - 1609
BT - 35th EPS Conference on Plasma Physics 2008, EPS 2008 - Europhysics Conference Abstracts
T2 - 35th European Physical Society Conference on Plasma Physics, EPS 2008 Combined with the 10th International Workshop on Fast Ignition of Fusion Targets
Y2 - 9 June 2008 through 13 June 2008
ER -
