Results 21 to 30 of about 797,546 (295)

Radial Transport Characteristics of Fast Ions Due to Energetic-Particle Modes inside the Last Closed-Flux Surface in the Compact Helical System [PDF]

, 2008
The internal behavior of fast ions interacting with magnetohydrodynamic bursts excited by energetic ions has been experimentally investigated in the compact helical system.
Akihide Fujisawa, Akihiro Shimizu, Chihiro Suzuki, Haruhisa Nakano, Kazuo Toi, Keisuke Matsuoka, Kenichi Nagaoka, Masaki Osakabe, Mitsutaka Isobe, Shin Nishimura, Shoichi Okamura, Shunsuke Ohshima, Tsuyoshi Akiyama, Yasuo Yoshimura, Yasushi Todo, Yoshihiko Nagashima   +15 more
core   +1 more source

4D and 5D phase-space tomography using slowing-down physics regularization

Nuclear Fusion, 2023
We compute reconstructions of 4D and 5D fast-ion phase-space distribution functions in fusion plasmas from synthetic projections of these functions. The fast-ion phase-space distribution functions originating from neutral beam injection (NBI) at TCV and ...
B.S. Schmidt, M. Salewski, D. Moseev, M. Baquero-Ruiz, P.C. Hansen, J. Eriksson, O. Ford, G. Gorini, H. Järleblad, Ye O. Kazakov, D. Kulla, S. Lazerson, J.E. Mencke, D. Mykytchuk, M. Nocente, P. Poloskei, M. Rud, A. Snicker, L. Stagner, S. Äkäslompolo, the W7-X Team   +20 more
doaj   +1 more source

Nonclassical Imaging for a quantum search of trapped ions [PDF]

, 2004
We discuss a simple search problem which can be pursued with different methods, either on a classical or on a quantum basis. The system is represented by a chain of trapped ions.
F. Yamaguchi, G. O. Ariunbold, G. S. Agarwal, G. S. Agarwal, H. Walther, J. von Zanthier   +5 more
core   +3 more sources

Complex lithium ion dynamics in simulated LiPO3 glass studied by means of multi-time correlation functions

, 2003
Molecular dynamics simulations are performed to study the lithium jumps in LiPO3 glass. In particular, we calculate higher-order correlation functions that probe the positions of single lithium ions at several times. Three-time correlation functions show
A. Heuer, A. Heuer, A. Heuer, A. Heuer, A. Karthikeyan, A.K. Jonscher, A.N. Cormack, B. Doliwa, B. Park, B. Roling, C. Liu, C.T. Moynihan, D.L. Sidebottom, E. Sunyer, E. Sunyer, F. Qi, G. Williams, H. Lammert, J. Habasaki, J. Habasaki, J. Horbach, J. Horbach, J. Kieffer, J. Quian, J.-J. Liang, J.C. Dyre, K. Funke, K. Muruganandam, K. Refson, K.L. Ngai, Leo van Wüllen, M. Vogel, M. Vogel, M. Vogel, M.A. Manalang, M.D. Ingram, Michael Vogel, P. Jund, P.F. Green, P.F. Green, R. Böhmer, R.K. Brow, S. Balasubramanian, S. Beaufils, S. English, S.D. Baranovskii, S.R. Elliot, S.W. Martin, U. Hoppe, W. Smith   +49 more
core   +1 more source

Controlling the nature of a charged impurity in a bath of Feshbach dimers [PDF]

, 2020
We theoretically study the dynamics of a trapped ion that is immersed in an ultracold gas of weakly bound atomic dimers created by a Feshbach resonance.
Gerritsma, Rene, Groenenboom, Gerrit C., Hirzler, Henrik, Lous, Rianne S., Pérez-Ríos, Jesús, Trimby, Eleanor   +5 more
core   +3 more sources

The NSTX fast-ion D-alpha diagnostic [PDF]

Review of Scientific Instruments, 2008
A new diagnostic, aimed at energy-resolved measurements of the spatial and temporal dynamics of fast ions in NSTX plasmas, is described. It is based on active charge-exchange recombination spectroscopy. The fast-ion signal is inferred from light emitted in the wavelength range of the Dα line by fast ions recombining with an injected neutral beam.
Podestà, M, Heidbrink, WW, Bell, RE, Feder, R   +3 more
openaire   +4 more sources

Fast-ion physics in SPARC [PDF]

Journal of Plasma Physics, 2020
Potential loss of energetic ions including alphas and radio-frequency tail ions due to classical orbit effects and magnetohydrodynamic instabilities (MHD) are central physics issues in the design and experimental physics programme of the SPARC tokamak.
Scott, S. D., Kramer, G. J., Tolman, E. A., Snicker, A., Varje, J., Sarkimaki, K., Wright, J. C., Rodriguez-Fernandez, P.   +8 more
openaire   +3 more sources

Optimization of the operational domain for ICRH scenarios in WEST from statistical analysis

Nuclear Fusion, 2023
In the WEST tokamak, the Ion Cyclotron Resonance Heating (ICRH) system plays a substantial role in increasing the plasma temperature. However, its efficiency can be lowered by two main phenomena: ripple-induced fast ion losses and technical limits on the
D. Moiraf, J. Morales, L. Colas, N. Fedorczak, J. Gaspar, R. Dumont, the WEST Team   +6 more
doaj   +1 more source

Preliminary study of velocity-space distribution of fast-ion loss under ion cyclotron resonance heating in the EAST

He jishu, 2023
BackgroundScintillator-based fast-ion loss detector (FILD) can measure the velocity-space distribution of fast-ion loss and are key in studying the control mechanism of fast-ion loss in nuclear fusion devices.PurposeThis study aims to obtain the velocity-
WANG Shusong, HUANG Juan, CHANG Jiafeng, ZHANG Xinjun, GAO Wei, FU Jing, SUN Yanxu, SHI Chang, WANG Xihui, ZHANG Zixin   +9 more
doaj   +1 more source

Design and initial operation of lost fast-ion probe based on thin Faraday films in CHS [PDF]

, 2006
The purpose of this work is to measure lost fast ions as an ion current so as to make quantitative argument on flux of fast-ion loss possible. We have designed and constructed a lost fast-ion probe based on combination of thin Faraday films and small ...
A. Shimizu, C. Suzuki, CHS Team, , D. S. Darrow, Darrow D. S., K. Goto, K. Matsuoka, K. Nagaoka, K. Toi, M. Isobe, M. Nishiura, Nishimura K., S. Nishimura, S. Okamura, T. Akiyama, Y. Yoshimura   +15 more
core   +2 more sources