Results 31 to 40 of about 1,756,819 (195)

Optimization of the Collective Thomson scattering diagnostic for future operation

Journal of Instrumentation, 2019
Collective Thomson scattering (CTS) is a microwave diagnostic allowing measurements of a number of plasma parameters such as the bulk ion temperature, the plasma composition, drift velocities and fast ion velocity distribution function. A CTS system has been successfully installed and commissioned on the Wendelstein 7-X (W7-X) stellarator. The measured
Abramovic, I., Moseev, D., Stange, T., Marsen, S., Kasparek, W., Nielsen, S., Tancetti, A., Salewski, M., Pavone, A., Svensson, J., Wolf, R., Laqua, H., Lopes Cardozo, N.   +12 more
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Design and performance of the collective Thomson scattering receiver at ASDEX Upgrade [PDF]

Review of Scientific Instruments, 2012
Here we present the design of the fast-ion collective Thomson scattering receiver for millimeter wave radiation installed at ASDEX Upgrade, a tokamak for fusion plasma experiments. The receiver can detect spectral power densities of a few eV against the electron cyclotron emission background on the order of 100 eV under presence of gyrotron stray ...
Furtula, Vedran, Salewski, Mirko; id_orcid 0000-0002-3699-679X, Leipold, Frank, Michelsen, Poul, Korsholm, Søren Bang; id_orcid 0000-0001-7160-8361, Meo, Fernando, Moseev, Dmitry, Nielsen, Stefan Kragh, Stejner Pedersen, Morten, Johansen, Tom Keinicke; id_orcid 0000-0001-8182-1051   +9 more
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105-GHz Notch Filter Design for Collective Thomson Scattering [PDF]

Fusion Science and Technology, 2011
A millimeter-wave notch filter with 105-GHz center frequency, >20-GHz passband coverage, and 1-GHz rejection bandwidth has been constructed. The design is based on a fundamental rectangular waveguide with cylindrical cavities coupled by narrow iris gaps, i.e., small elongated holes of negligible thickness.
Furtula, Vedran, Michelsen, Poul, Leipold, Frank, Johansen, T., Korsholm, Søren Bang; id_orcid 0000-0001-7160-8361, Meo, Fernando, Moseev, Dmitry, Nielsen, Stefan Kragh, Salewski, Mirko; id_orcid 0000-0002-3699-679X, Stejner Pedersen, Morten   +9 more
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Effects of relativistic electrons on the calculated collective Thomson scattered spectra [PDF]

Physical Review E, 1995
The effects of relativistic electrons on the spectral density function {ital S}({bold k},{omega}) are evaluated in the collective Thomson scattering regime for ion diagnostics. An electromagnetic code that calculates the electron density fluctuation term of {ital S}({bold k},{omega}) has been modified by treating the electrons with a relativistic ...
, Rhee, , Woskov, , Machuzak
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Recovering non-Maxwellian particle velocity distribution functions from collective Thomson-scattered spectra

AIP Advances, 2023
Collective optical Thomson scattering (TS) is a diagnostic commonly used to characterize plasma parameters. These parameters are typically extracted by a fitting algorithm that minimizes the difference between a measured scattered spectrum and an ...
B. C. Foo, D. B. Schaeffer, P. V. Heuer
doaj   +1 more source

Development of a Thomson Scattering system for the SMART tokamak

, 2023
reservedThis master thesis presents the development of Thomson scattering di- agnostic system in SMART tokamak, estimating the number of detected photoelectrons and designing the laser beam path for Thomson scattering diagnostic of SMART tokamak ...
WAR WAR MYINT MYAT PHYO, XXX
core  

Interaction of 0.53 μm laser pulse with millimeter-scale plasmas generated with gas-bag target

EPJ Web of Conferences, 2013
Reported are the interactions of 0.53 μm laser pulse with millimeter-scale plasmas that are produced with gas-bag target irradiated with 0.35 μm laser pulses.
Zheng Jian, Li Zhi-chao, Jiang Xiao-hua, Wang Zhe-bin, Zhao Bin, Hu Guang-yue, Yin Qiang, Wang Feng, Peng Xiao-shi, Zhu Fang-hua, Li San-wei, Yuan Zheng, Liu Yong-gang, Chen Li, Yuan Peng, Guo Liang, Liu Shen-ye, Ding Yong-kun   +17 more
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Collision correction on collective Thomson scattering spectra and its application in inertial confinement fusion hohlraum plasmas [PDF]

Matter and Radiation at Extremes
Collective Thomson scattering (CTS) is crucial for inertial confinement fusion (ICF) hohlraum diagnostics, but measurement of the electron plasma wave (EPW) feature remains challenging.
Hang Zhao, Yaoyuan Liu, Zhichao Li, Tao Gong, Chaoxin Chen, Jianhua Zheng, Longyu Kuang, Xin Li, Kaiqiang Pan, Qi Li, Sanwei Li, Xuelong Qin, Liang Guo, Dong Yang   +13 more
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Side emissions during EC injection for PDI studies in FTU tokamak [PDF]

EPJ Web of Conferences, 2019
The evidence of Parametric Decay Instabilities (PDI) excited by the ECH power injected in O-Mode has been explored in FTU Tokamak, using the Collective Thomson Scattering (CTS) diagnostic.
Bruschi Alessandro, Alessi Edoardo, Baiocchi Benedetta, Bin William, D’Arcangelo Ocleto, Fanale Francesco, Figini Lorenzo, Galperti Cristian, Garavaglia Saul, Gittini Giuseppe, Granucci Gustavo, Grosso Giovanni, Lubyako Lev, Mazzotta Cristina, Mellera Vittoria, Moro Alessandro, Orsitto Francesco, Pallotta Fabrizio, Rocchi Giuliano, Simonetto Alessandro, Tartari Umberto, Tudisco Onofrio   +21 more
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On the influence of plasma turbulence on collective Thomson scattering measurements

Physics of Plasmas, 2023
Plasma turbulence can result in significant distortion of probing and receiving microwave beams, and this effect can modify the registered spectrum in a collective Thomson scattering (CTS) experiment. An analytical description of the CTS experiment is provided in this paper for the probing beam distortion due to the plasma edge turbulence.
Tretinnikov, P, Gusakov, E, Heuraux, S
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