Results 11 to 20 of about 1,756,819 (195)

Advances in the FTU collective Thomson scattering system

Review of Scientific Instruments, 2016
The new collective Thomson scattering diagnostic installed on the Frascati Tokamak Upgrade device started its first operations in 2014. The ongoing experiments investigate the presence of signals synchronous with rotating tearing mode islands, possibly due to parametric decay processes, and phenomena affecting electron cyclotron beam absorption or ...
Bin W, Bruschi A, D'Arcangelo O, Grosso G, Lubiako L, Alessi E, Castaldo C, Centioli C, De Angeli M, Figini L, Galperti C, Garavaglia S, Granucci G, Lontano M, Magagnino S, Mellera V, Minelli D, Moro A, Muraro A, Nardone A, Orsitto F, Simonetto A, Tartari U   +22 more
core   +6 more sources

Subterahertz gyrotron developments for collective Thomson scattering in LHD [PDF]

Review of Scientific Instruments, 2008
Collective Thomson scattering (CTS) is expected to provide the spatially resolved velocity distribution functions of not only thermal and tail ions but also alpha particles resulting from fusion reactions. CTS using gyrotrons with frequency higher than the conventional ones used for plasma heating would have advantages to alleviate refraction, cutoff ...
T, Notake, T, Saito, Y, Tatematsu, S, Kubo, T, Shimozuma, K, Tanaka, M, Nishiura, A, Fujii, La, Agusu, I, Ogawa, T, Idehara   +10 more
core   +8 more sources

Collective Thomson scattering diagnostic at Wendelstein 7-X [PDF]

Review of Scientific Instruments, 2019
A Collective Thomson Scattering (CTS) diagnostic is installed at Wendelstein 7-X for ion temperature measurements in the plasma core. The diagnostic utilizes 140 GHz gyrotrons usually used for electron cyclotron resonance heating (ECRH) as a source of probing radiation.
D. Moseev, M. Stejner, T. Stange, I. Abramovic, H. P. Laqua, S. Marsen, N. Schneider, H. Braune, U. Hoefel, W. Kasparek, S. B. Korsholm, C. Lechte, F. Leipold, S. K. Nielsen, M. Salewski, J. Rasmussen, M. Weißgerber, R. C. Wolf   +17 more
openaire   +6 more sources

Design of the Collective Thomson Scattering System on HL-3 tokamak [PDF]

EPJ Web of Conferences
A collective Thomson scattering (CTS) diagnostic system is being developed to measure fastion velocity distribution on HL-3 tokamak. A 140 GHz gyrotron belonging to electron cyclotron resonance heating (ECRH) system would be used to generate probe beam ...
Deng Weichu, Shi Zhongbing, Shi Peiwan, Zhang Feng, Yu Xin, Yang Zengchen, Jiang Min, Zhou Yu, Shen Yuqi, Han Kexi, Hu Liwen, Zhong Wulyu   +11 more
doaj   +2 more sources

154 GHz collective Thomson scattering in LHD [PDF]

Journal of Instrumentation, 2018
Collective Thomson scattering (CTS) was developed by using a 154 GHz gyrotron, and the first data has been obtained. Already, 77 GHz CTS has worked successfully. However, in order to access higher density region, 154 GHz option enhances the usability that reduces the refraction effect, which deteriorates in the local measurements.
Tanaka, K., Nishiura, M., Kubo, S., Shimozuma, T., Saito, T., Moseev, D., Abramovic, I.   +6 more
openaire   +5 more sources

ITER Fast Ion Collective Thomson Scattering: Detailed integrated design of the collective Thomson scattering (CTS) system for ITER [PDF]

, 2005
The EFDA Contract 04-1213 with Risø National Laboratory concerning a detailed integrated design of a Fast Ion Collective Thomson Scattering (CTS) diagnostic for ITER was signed on 31 December 2004.In 2003 the Risø CTS group finished a feasibility study and a conceptual design of an ITER Fast Ion Collective Thomson Scattering System (Contract 01.654) [1,
Bindslev, Henrik, Larsen, Axel Wright, Meo, Fernando, Michelsen, Poul, Michelsen, Susanne, Nielsen, Anders Henry; id_orcid 0000-0003-3642-3905, Nimb, Søren Robert, Tsakadze, Erekle   +7 more
openaire   +2 more sources

Progress And Prospects Of The Ftu Collective Thomson Scattering Diagnostics [PDF]

Proceedings of 1st EPS conference on Plasma Diagnostics — PoS(ECPD2015), 2016
During the last years anomalous signals have been found in the spectra analyzed with the Collective Thomson Scattering (CTS) diagnostics in tokamak devices like TEXTOR, ASDEX and FTU. The signal frequency, down-shifted with respect to the probing one, suggested the explanation of their origin in terms of Parametric Decay Instability (PDI) processes ...
Bin W, Bruschi A, Figini L, Garavaglia S, Granucci G, Grosso G, Mellera V, Minelli D, Moro A, Nardone A, Simonetto A, Tartari U, D'Arcangelo O, Galperti C   +13 more
openaire   +3 more sources

Validation of EDGDE2D-EIRENE predicted 2D distributions of electron temperature and density against divertor Thomson scattering measurements in the low-field side divertor leg in DIII-D

Nuclear Materials and Energy, 2023
Comparisons of profiles of the electron temperature (Te), density (ne) and pressure (pe) measured with Divertor Thomson Scattering in DIII-D low-confinement mode discharges to predictions from the edge fluid code EDGE2D-EIRENE [1] show that the models ...
M. Groth, A.G. McLean, W.H. Meyer, A.W. Leonard, S.L. Allen, G. Corrigan, M.E. Fenstermacher, D. Harting, C.J. Lasnier, F. Scotti, H.Q. Wang, J.G. Watkins   +11 more
doaj   +1 more source

Two-Dimensional Thomson Scattering in Laser-Produced Plasmas

Instruments, 2023
We present two-dimensional (2D) optical Thomson scattering measurements of electron density and temperature in laser-produced plasmas. The novel instrument directly measures ne(x,y) and Te(x,y) in two dimensions over large spatial regions (cm2) with sub ...
Haiping Zhang, Jessica J. Pilgram, Carmen G. Constantin, Lucas Rovige, Peter V. Heuer, Sofiya Ghazaryan, Marietta Kaloyan, Robert S. Dorst, Derek B. Schaeffer, Christoph Niemann   +9 more
doaj   +1 more source

Material assessment for ITER's collective Thomson Scattering first mirror [PDF]

2015 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2015
ITER's Collective Thomson Scattering (CTS) system is a diagnostic instrument that will measure the plasma density and velocity through Thomson scattering of microwave radiation. Some of the key components of the CTS are quasioptical mirrors used to produce astigmatic beam patterns, which have impact on the strength and spatial resolution of the ...
Santos, R., Policarpo, H., Gonçalves, B., Varela, P., Nonbøl, Erik, Klinkby, Esben Bryndt; id_orcid 0000-0002-1908-5644, Lauritzen, Bent; id_orcid 0000-0001-7173-1650, Romanets, Y., Luis, R., Vaz, P.   +9 more
openaire   +2 more sources