Use of machine learning for a helium line intensity ratio method in Magnum-PSI

Autor: Shin Kajita, Sho Iwai, Hirohiko Tanaka, Daisuke Nishijima, Keisuke Fujii, Hennie van der Meiden, Noriyasu Ohno

Publikováno v: Nuclear Materials and Energy, Vol 33, Iss , Pp 101281- (2022)

Optical emission spectroscopy (OES) of helium (He) line intensities has been used to measure the electron density, ne, and temperature, Te, in various plasma devices. In this study, a neural network with five hidden layers is introduced to model the

Externí odkaz: https://doaj.org/article/489ee45854dd4e0e90613d7ee6f743c4

Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux

Autor: Yuki Hayashi, Hirohiko Tanaka, Noriyasu Ohno, Shin Kajita, Thomas Morgan, Hennie van der Meiden, John Scholten, Jordy Vernimmen, Hiroki Natsume, Keiji Sawada, Shota Masuda

Publikováno v: Plasma Physics and Controlled Fusion, 64, 105013
Yuki Hayashi et al 2022 Plasma Phys. Control. Fusion 64 105013

From pulsed plasma experiments focusing on neutral pressure dependence, the impacts of a transition from a low to a high recycling target on the particle load were investigated and discussed in the linear plasma device, Magnum-PSI. Time traces of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41f58570683b7d527e4a015ee8578062
https://www.differ.nl/bibcite/reference/8807

In-situ LIBS and NRA deuterium retention study in porous W-O and compact W coatings loaded by Magnum-PSI

Autor: Indrek Jõgi, Peeter Paris, Matteo Passoni, Wim M. Arnoldbik, K. Piip, David Dellasega, Hennie van der Meiden, E. Grigore

Publikováno v: Fusion engineering and design 168 (2021): 112403-1–112403-8. doi:10.1016/j.fusengdes.2021.112403
info:cnr-pdr/source/autori:Paris P.; Jogi I.; Piip K.; Passoni M.; Dellasega D.; Grigore E.; Arnoldbik W.M.; van der Meiden H./titolo:In-situ LIBS and NRA deuterium retention study in porous W-O and compact W coatings loaded by Magnum-PSI/doi:10.1016%2Fj.fusengdes.2021.112403/rivista:Fusion engineering and design/anno:2021/pagina_da:112403-1/pagina_a:112403-8/intervallo_pagine:112403-1–112403-8/volume:168
Fusion Engineering and Design, 168, 112403
Fusion Engineering and Design

The purpose of this study is to investigate the applicability of in-situ laser induced breakdown spectroscopy (LIBS) for deuterium retention measurements in tungsten coatings with different morphology and oxygen content. These were exposed to a Gauss

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::004f9883346927a1f0372d79612023af

Low frequency fluctuation study using a microwave interferometer and Hα line emission measurement systems in the Pilot-PSI device

Autor: Yoriko Shima, R. Al, Junko Kohagura, Yousuke Nakashima, Mizuki Sakamoto, J.W.M. Vernimmen, Hennie van der Meiden, Masayuki Yoshikawa

Publikováno v: AIP Advances, 9, 085225
AIP Advances, Vol 9, Iss 8, Pp 085225-085225-7 (2019)

A frequency multiplied microwave interferometer, a Hα line emission measurement system, and a high speed camera system were installed on the Pilot-PSI device for low frequency fluctuation study in the detached plasma condition. The two dimensional H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bd7b912711500aa370d6de4eb180cf1
https://www.differ.nl/bibcite/reference/8457

Thomson Scattering Measurement of Two Electron Temperature Components in Transition to Detached Plasmas

Autor: H. Ohshima, Hennie van der Meiden, Shin Kajita, Hirohiko Tanaka, Noriyasu Ohno

Publikováno v: Plasma and Fusion Research, 13, 1201099

We have performed laser Thomson scattering (LTS) measurements during the transition between attached and detached helium plasmas in the linear divertor simulator NAGDIS-II. In the detached plasma, the LTS spectrum shows a discrepancy with a single Ga

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c7b71f7a3502355e3ed85c43eb74ff6
https://doi.org/10.1585/pfr.13.1201099