Upgraded multipulse laser and multipoint Thomson scattering diagnostics on EAST

Zang, Qing; Zhao, Junyu; Yang, Li; Hu, Qingsheng; Xi, Xiaoqi; Dai, Xingxing; Yang, Jianhua; Han, Xiaofeng; Li, Mengting; Hsieh, C. L.

doi:10.1063/1.3599039

Cited by 81 publications

(53 citation statements)

References 9 publications

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“…In the formula, the impurity temperature is taken to be same as the main ion temperature. At present on EAST, T e and n e profiles are from Thomson scattering measurement [13,14]. T i profiles are from the x-ray imaging crystal spectrometer (XCS) [15,16].…”

Section: Kinetic Pressure Constraintmentioning

confidence: 99%

Kinetic equilibrium reconstruction on EAST tokamak

Li¹,

Ren²,

Qian³

et al. 2013

Plasma Phys. Control. Fusion

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Plasma equilibrium is an important basis for tokamak plasma research. The equilibrium reconstructed from experimental diagnostics is a key element for experiments analysis and for theory study. The kinetic equilibrium has the profiles information (current or safety factor profile, kinetic pressure profile), which are key issues for some studies of physics. With the constraints of magnetic measurements, pressure profile and edge current profile, we achieved the first reconstructed kinetic equilibrium on EAST tokamak. The pressure and edge current profiles are based on the diagnostics and theoretical bootstrap current model. The kinetic equilibrium has the pedestal structure for H-mode plasma, which the magnetic reconstruction missed. This improved equilibrium is an important basis for some experimental analysis and theory studies on EAST.

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Section: Kinetic Pressure Constraintmentioning

confidence: 99%

Kinetic equilibrium reconstruction on EAST tokamak

Li¹,

Ren²,

Qian³

et al. 2013

Plasma Phys. Control. Fusion

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“…Fig. 8 shows the comparison of the electron temperature profiles measured by the Michelson interferometer and the Thomson scattering (TS) diagnostic [26] for an ICRF heated pulse (#48272, B t : 2.25 T @ 1.85 m, I p : 400 kA, n e : 2.5 × 10 19 cm −3 ). The line of sight for TS is along a vertical chord, and the normalized effective radius ρ (ρ = √ ψ N , where ψ N is normalized toroidal flux) is used.…”

Section: Comparison With Results Of Other Diagnosticsmentioning

confidence: 99%

Impurity Emission Behavior in the Soft X-Ray and Extreme Ultraviolet Range on EAST

Shen

Lyu

2015

Plasma Sci. Technol.

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A Michelson interferometer, on loan from EFDA-JET (Culham, United Kingdom) has recently been commissioned on the experimental advanced superconducting tokamak (EAST, ASIPP, Hefei, China). Following a successful in-situ absolute calibration the instrument is able to measure the electron cyclotron emission (ECE) spectrum, from 80 GHz to 350 GHz in extraordinary mode (X-mode) polarization, with high accuracy. This allows the independent determination of the electron temperature profile from observation of the second harmonic ECE and the possible identification of non-Maxwellian features by comparing higher harmonic emission with numerical simulations. The in-situ calibration results are presented together with the initial measured temperature profiles. These measurements are then discussed and compared with other independent temperature profile measurements. This paper also describes the main hardware features of the diagnostic and the associated commissioning test results.

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“…where the impurity temperature is assumed to be the same as the main ion temperature T. i In the experiment, T e is measured by the Thomson scattering (TS) [31,32], n e is measured by the TS, the polarimeter-interferometer (POINT) [33]. With the assumption of a single impurity (usually carbon), n i and n z are deduced from the measured Z eff and n e according to the quasi-neutrality condition.…”

Section: Experimental Setup and Modelingmentioning

confidence: 99%

Kinetic equilibrium reconstruction for the NBI- and ICRH-heated H-mode plasma on EAST tokamak

Zheng¹,

Xiang²,

CHEN³

et al. 2018

Plasma Sci. Technol.

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The equilibrium reconstruction is important to study the tokamak plasma physical processes. To analyze the contribution of fast ions to the equilibrium, the kinetic equilibria at two time-slices in a typical H-mode discharge with different auxiliary heatings are reconstructed by using magnetic diagnostics, kinetic diagnostics and TRANSP code. It is found that the fast-ion pressure might be up to one-third of the plasma pressure and the contribution is mainly in the core plasma due to the neutral beam injection power is primarily deposited in the core region. The fast-ion current contributes mainly in the core region while contributes little to the pedestal current. A steep pressure gradient in the pedestal is observed which gives rise to a strong edge current. It is proved that the fast ion effects cannot be ignored and should be considered in the future study of EAST.

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Upgraded multipulse laser and multipoint Thomson scattering diagnostics on EAST

Cited by 81 publications

References 9 publications

Kinetic equilibrium reconstruction on EAST tokamak

Kinetic equilibrium reconstruction on EAST tokamak

Impurity Emission Behavior in the Soft X-Ray and Extreme Ultraviolet Range on EAST

Kinetic equilibrium reconstruction for the NBI- and ICRH-heated H-mode plasma on EAST tokamak

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