Feasibility study of a high spatial and time resolution beam emission spectroscopy diagnostic for localized density fluctuation measurements in Lithium Tokamak eXperiment-β (LTX-β)

被引：0

作者：

Banerjee, Santanu ^{[1
]}

Boyle, D. P. ^{[1
]}

Maan, A. ^{[1
]}

Majeski, R. ^{[1
]}

Kaita, R. ^{[1
]}

Smith, D. ^{[2
]}

von Hellermann, M. ^{[3
]}

Hansen, C. ^{[4
]}

Capecchi, W. ^{[2
]}

Elliott, D. ^{[5
]}

机构：

[1] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA

[2] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[3] Forschungszentrum Julich, Inst Energy & Climate Res IEK 4, D-52425 Julich, Germany

[4] Univ Washington, Dept Aeronaut & Astronaut, Seattle, WA 98195 USA

[5] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2022年 / 93卷 / 11期

关键词：

PERFORMANCE;

D O I：

10.1063/5.0101834

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Trapped electron mode (TEM) is the main source of turbulence predicted for the unique operation regime of a flat temperature profile under low-recycling conditions in the LTX-beta tokamak, while ion temperature gradient driven turbulence may also occur with gas fueling from the edge. To investigate mainly TEM scale density fluctuations, a high spatial and time resolution 2D beam emission spectroscopy (BES) diagnostic is being developed. Apart from spatially localized density turbulence measurement, BES can provide turbulence flow and flow shear dynamics. This BES system will be realized using an avalanche photodiode-based camera and narrow band interference filter. The system can acquire data at 2 MHz. Simulations with the Simulation of Spectra (SOS) code indicate that a high signal to noise ratio can be achieved with the proposed system. This will enable sampling the density fluctuations at this high time resolution. The design considerations and system optimization using the SOS code are presented. Published under an exclusive license by AIP Publishing.

引用

页数：5