Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Review of Scientific Instruments
57 (1986), S. 2020-2022
ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The poloidal rotation velocity in the edge region of ohmically heated Alcator C plasmas was measured using the Doppler shift of impurity emission lines. The measurements were made using a high-resolution, photon counting detector, sensitive to wavelengths from ∼1200 to ∼2000 A(ring), mounted in the exit plane of a 1-m Ebert–Fastie spectrometer. The transitions used were the 2s2p 1P01–2p2 1D2 at 1371.292 A(ring) in O v and 2s 2S1/2–2p 2P01/2 at 1242.804 A(ring) in N v, both of which exist near the limiter radius in Alcator C. The measured rotation velocity is ∼4.1×105 ±2.1×105 cm/s at n¯e∼1.7×1014 cm−3 in the direction of the electron diamagnetic drift and is ∼1.4×105 ±2.5×105 cm/s at n¯e∼2.3×1014 cm−3 in the ion diamagnetic drift direction, although the error bars associated with this last measurement do not preclude the possibility of zero rotation or rotation in the electron diamagnetic drift direction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1138777
| Library |
Location |
Call Number |
Volume/Issue/Year |
Availability |
