Results 21 to 30 of about 23,557 (298)

Fabrication and ab initio study of downscaled graphene nanoelectronic devices [PDF]

, 2012
In this paper we first present a new fabrication process of downscaled graphene nanodevices based on direct milling of graphene using an atomic-size helium ion beam. We address the issue of contamination caused by the electron-beam lithography process to
Marek E. Schmidt, Harvey N. Rutt, Moktadir, Zakaria, Tsuchiya, Yoshishige, Manoharan Muruganathan, Shuojin Hang, Darren M. Bagnall, Harold Chong, Hiroshi Mizuta, Kalhor, Nima, Chi, Dam Hieu, Cuong, Nguyen Tien, Boden, Stuart A., Chong, Harold, Mizuta, Hiroshi, Rutt, Harvey N., Dam Hieu Chi, Schmidt, Marek E., Stuart A. Boden, Zakaria Moktadir, Nima Kalhor, Yoshishige Tsuchiya, Bagnall, Darren M., Muruganathan, Manoharan, Nguyen Tien Cuong, Otsuka, Nobuo, Nobuo Otsuka, Hang, Shuojin   +27 more
core   +1 more source

Dissipation engineered directional filter for quantum ratchets

Physical Review Research, 2021
We demonstrate transport rectification in a Hermitian Hamiltonian quantum ratchet by a dissipative, dynamic impurity. While the bulk of the ratchet supports transport in both directions, the properly designed loss function of the local impurity acts as a
Zlata Fedorova, Christoph Dauer, Anna Sidorenko, Sebastian Eggert, Johann Kroha, Stefan Linden   +5 more
doaj   +1 more source

Reproduction of collector probe deposition profiles using the far-SOL impurity transport code 3DLIM

Nuclear Materials and Energy, 2020
First results are reported from the 3D Monte Carlo far-SOL impurity transport code 3DLIM. Tungsten deposition profiles measured on a Collector Probe (CP) located in the far-SOL near the outer midplane, OMP, during W tracer experiments in DIII-D are ...
S.A. Zamperini, J.D. Elder, P.C. Stangeby, J.H. Nichols, D.C. Donovan, J.D. Duran, E.A. Unterberg, D.L. Rudakov   +7 more
doaj   +1 more source

Impurity Transport in a Mixed-Collisionality Stellarator Plasma [PDF]

Physical Review Letters, 2017
11 pages, 3 ...
Helander, P., Newton, S., Mollen, A., Smith, H.   +3 more
openaire   +4 more sources

Refining light impurity content estimates at the lower divertor based on experimental data in WEST

Nuclear Materials and Energy, 2023
WEST is an actively cooled, long-pulse tokamak with nearly all plasma-facing components (PFC) made of tungsten (W). One of the aims of WEST is to study plasma operation with W PFCs in preparation for long-pulse operation on W divertor devices like ITER ...
A. Grosjean, D.C. Donovan, C.A. Johnson, J.P. Gunn, C. Guillemaut, N. Fedorczak, C.C. Klepper, E.A. Unterberg   +7 more
doaj   +1 more source

The influence of E× B drift on tungsten target erosion and W impurity transport during neon seeding on EAST

Nuclear Fusion, 2023
Mitigating tungsten (W) wall erosion and core accumulation are vitally important for the steady-state operation of tokamaks. It is well known that drifts have a great impact on the transport of charged particles in the edge region, which could affect W ...
Yilin Wang, Chaofeng Sang, Xuele Zhao, Yihan Wu, Qingrui Zhou, Yanjie Zhang, Dezhen Wang   +6 more
doaj   +1 more source

Modeling of Impurity Transport in the Divertor of JET

Plasma and Fusion Research, 2013
Deposition/erosion measurements by means of a Quartz Micro Balance (QMB) located below the Load Bearing Septum Replacement Plate in the private flux region of the inner divertor of JET (with full carbon wall) revealed net deposition with the inner strike point located on the vertical tile and net erosion with the inner strike point on the horizontal ...
KIRSCHNER, Andreas, MATVEEV, Dmitry, GROTH, Mathias, BREZINSEK, Sebastijan, KOTOV, Vladislav, KRIEGER, Karl, BORODIN, Dmitry, BJÖRKAS, Carolina, AIRILA, Markus, ESSER, Hans G., SERGIENKO, Gennady, SAMM, Ulrich, JET EFDA CONTRIBUTORS   +12 more
openaire   +5 more sources

Stability of divertor detachment

Nuclear Materials and Energy, 2017
The 2D simulations of edge plasma transport show that unlike some earlier publications, the impurity radiation loss per se does not cause the bifurcation-like transition to detached divertor regime.
S.I. Krasheninnikov, A.S. Kukushkin, A.A. Pshenov, A.I. Smolyakov, Yanzeng Zhang   +4 more
doaj   +1 more source

Progress in Impurity-Related Physics Experiments in LHD

, 2010
A variety of density profiles observed in the Large Helical Device (LHD) have suggested an interesting core impurity transport. The edge impurity transport in the ergodic layer formed by stochastic magnetic field lines with long connection length (10 ...
KANEKO, Osamu, Suguru MASUZAKI, Naoko ASHIKAWA, YOSHINUMA, Mikiro, LHD, experiment group, Ryuichi SAKAMOTO, Kazuo TOI, Osamu KANEKO, CU, Zhengying, OSAKABE, Masaki, Jun YANAGIBAYASHI, Ichihiro YAMADA, IKEDA, Katsunori, Sadatsugu MUTO, IDA, Katsumi, IWAMAE, Atsushi, Masayuki YOKOYAMA, Satoshi OHDACHI, YAMAZAKI, Kozo, KOBAYASHI, Masahiro, TSUMORI, Katsuyoshi, YOKOYAMA, Masayuki, YAMADA, Ichihiro, HASUO, Masahiro, Tokihiko TOKUZAWA, Masaki OSAKABE, GOTO, Motoshi, Katsumi IDA, SAKAKIBARA, Satoru, Masahiro KOBAYASHI, Satoru SAKAKIBARA, YANAGIBAYASHI, Jun, Kenichi NAGAOKA, Xiang GAO, OHDACHI, Satoshi, Motoshi GOTO, FUJII, Keisuke, Kozo YAMAZAKI, Mamoru SHOJI, Zhengying CUI, Hangyu ZHOU, Masayuki TOKITANI, Hiroshi YAMADA, SHOJI, Mamoru, Tomohiro MORISAKI, SAKAMOTO, Ryuichi, TAKEIRI, Yasuhiko, MORITA, Shigeru, MORISAKI, Tomohiro, ZHOU, Hangyu, WATANABE, Kiyomasa, null LHD experiment group, MIYAZAWA, Junichi, AKIYAMA, Tsuyoshi, NARIHARA, Kazumichi, Akio KOMORI, Shigeru MORITA, Keisuke FUJII, Kenji TANAKA, YAMADA, Hiroshi, GAO, Xiang, Tsuyoshi AKIYAMA, Kazumichi NARIHARA, Mikiro YOSHINUMA, KOMORI, Akio, ASHIKAWA, Naoko, Katsunori IKEDA, DONG, Chunfeng, Kiyomasa WATANABE, TOKUZAWA, Tokihiko, Katsuyoshi TSUMORI, Junichi MIYAZAWA, Masahiro HASUO, Atsushi IWAMAE, Chunfeng DONG, Yasuhiko TAKEIRI, TANAKA, Kenji, MUTO, Sadatsugu, NAGAOKA, Kenichi, TOKITANI, Masayuki, MASUZAKI, Suguru, TOI, Kazuo   +81 more
core   +1 more source

Turbulent and neoclassical impurity transport in tokamak plasmas

, 2009
Impurity particle transport in tokamaks is studied using an electrostatic fluid model for main ion and impurity temperature gradient (ITG)͒ mode and trapped electron (TE͒) mode turbulence in the collisionless limit and neoclassical theory.
T. Fülöp, H. Nordman, Fülöp, Tünde, F\ufcl\uf6p, T\ufcnde, Nordman, Hans   +4 more
core   +2 more sources