Results 11 to 20 of about 1,068 (190)

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   +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

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

Optimization of the Collective Thomson scattering diagnostic for future operation [PDF]

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
core   +6 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

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
openaire   +3 more sources

A novel system for micron-scale analysis of energy deposition and response to low-dose radiation. [PDF]

Med Phys
Abstract Background Micrometer‐scale evaluation of energy deposition is important for radiation protection and therapy as well as for advancing knowledge of responses to radiation in materials and biological systems. Due to the stochastic nature of radiation interactions, there is significant variation in energy deposition in micrometer‐sized targets ...
Pasricha P, McNairn C, Mansour IR, Milligan K, Muir BR, Andrews JL, Cassol E, Chauhan V, Subedi S, Jirasek A, Murugkar S, Thomson RM.   +11 more
europepmc   +2 more sources

Developments for collective Thomson scattering equipment with a sub-THz gyrotron in LHD [PDF]

EPJ Web of Conferences, 2019
Plan of collective Thomson scattering (CTS) experiment for the Large Helical Device (LHD) in NIFS with a 303 GHz gyrotron is under way. Use of a sub-THz gyrotron expands the CTS-applicable region of plasma parameters.
Saito Teruo, Tatematsu Yoshinori, Yamaguchi Yuusuke, Fukunari Masafumi, Hirobe Takumi, Shinbayashi Ryushi, Tanaka Shunsuke, Ohkubo Kunizo, Kubo Shin, Shimozuma Takashi, Tanaka Kenji, Nishiura Masaki   +11 more
doaj   +1 more source

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