1. Measurement of Density Profiles with Pressure in MAP-II and DiPS Linear Devices
- Author
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Shota Tanaka, T. Lho, Y.-J. Seo, Taiichi Shikama, K. Kurihara, Shinichiro Kado, M.-J. Lee, G.-S. Choi, Y. Kuwahara, H.-J. Woo, K.-S. Chung, and Filippo Scotti
- Subjects
Nuclear and High Energy Physics ,Materials science ,Thomson scattering ,Mechanical Engineering ,Divertor ,Magnetic field ,symbols.namesake ,Nuclear Energy and Engineering ,Mach number ,Torr ,symbols ,Electron temperature ,General Materials Science ,Plasma diagnostics ,Atomic physics ,Civil and Structural Engineering ,Plasma density - Abstract
Radial profiles of plasma density and electron temperature have been measured by a fast-scanning probe (FSP) system with various neutral pressures in the MAP-II and DIPS linear devices for the divertor simulation. The probe system is made of three probe tips, two of which is for a Mach probe consisting of two opposite-directional probes, and one is for an emissive probe installed on the pneumatically driven fast-scanning system with stroke of 30 cm. In MAP-II, density at the center has been varied from 1.5 × 10 13 cm -3 to 0.7 x 10 13 cm -3 with pressures of 5.5 to 112 mtorr, while that of DiPS varied from 3.5 × 10 12 cm -3 to 9 × 10 12 cm -3 with pressures of 0.8 to 50 mtorr. Relation of density profile with the working pressure/magnetic field is analyzed by using a simple fluid model. Electron temperature at the center is also measured by the Thomson scattering method and compared with those of FSP, which is varied from 0.6 to 6.5 eV.
- Published
- 2007
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