Results 31 to 40 of about 190,947 (267)

Overview of fast particle experiments in the first MAST Upgrade experimental campaigns

Nuclear Fusion
MAST-U is equipped with on-axis and off-axis neutral beam injectors (NBI), and these external sources of super-Alfvénic deuterium fast-ions provide opportunities for studying a wide range of phenomena relevant to the physics of alpha-particles in burning
J.F. Rivero-Rodríguez, K.G. McClements, M. Fitzgerald, S.E. Sharapov, M. Cecconello, N.A. Crocker, I. Dolby, M. Dreval, N. Fil, J. Galdón-Quiroga, M. García-Muñoz, S. Blackmore, W. Heidbrink, S. Henderson, A. Jackson, A. Kappatou, D. Keeling, D. Liu, Y.Q. Liu, C. Michael, H.J.C. Oliver, P. Ollus, E. Parr, G. Prechel, T. Rhodes, D. Ryan, P. Shi, M. Vallar, L. Velarde, T. Williams, H. Wong, the EUROfusion Tokamak Exploitation Team, the MAST-U Team   +32 more
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Energy partition of fast ions and fast electrons in foil plasma expansion under continuous irradiation with kJ petawatt laser light

Frontiers in Physics
Kilojoule-class relativistic-intensity lasers with multi-picosecond (ps) pulse durations can efficiently produce fast ions in interactions with thin foil plasmas via target normal sheath acceleration (TNSA).
Natsumi Iwata, Yasuhiko Sentoku
doaj   +1 more source

Impact of interaction between RF waves and fast NBI ions on the fusion performance in JET DTE2 campaign

Nuclear Fusion, 2023
This work presents a study of the interaction between radio frequency (RF) waves used for ion cyclotron resonance heating and the fast deuterium (D) and tritium (T) neutral Beam injected (NBI) ions in DT plasma.
K.K. Kirov, C.D. Challis, E. De la Luna, J. Eriksson, D. Gallart, J. Garcia, M. Gorelenkova, J. Hobirk, P. Jacquet, A. Kappatou, Y.O. Kazakov, D. Keeling, D. King, E. Lerche, C. Maggi, J. Mailloux, P. Mantica, M. Mantsinen, M. Maslov, S. Menmuir, P. Siren, Z. Stancar, D. Van Eester, JET Contributors   +23 more
doaj   +1 more source

Controlling Fast Transport of Cold Trapped Ions [PDF]

Physical Review Letters, 2012
We realize fast transport of ions in a segmented micro-structured Paul trap. The ion is shuttled over a distance of more than 10^4 times its groundstate wavefunction size during only 5 motional cycles of the trap (280 micro meter in 3.6 micro seconds). Starting from a ground-state-cooled ion, we find an optimized transport such that the energy increase
Walther, Andreas, Ziesel, Frank, Ruster, Thomas, Dawkins, Sam T., Ott, Konstantin, Hettrich, Max, Singer, Kilian, Schmidt-Kaler, Ferdinand, Poschinger, Ulrich   +8 more
openaire   +3 more sources

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Study of ion cyclotron emission excited by tritium ions of fusion products via magnetoacoustic cyclotron instability theory in the EAST

Nuclear Fusion
This study investigates the ion cyclotron emission (ICE) excited by tritium ions generated through deuterium‒deuterium fusion reactions in the Experimental Advanced Superconducting Tokamak (EAST). ICE is an electromagnetic instability driven by fast ions,
Huapeng Zhang, Lunan Liu, Wei Zhang, Xuan Sun, Xinjun Zhang, Baolong Hao   +5 more
doaj   +1 more source

Real-time implementation of the high-fidelity NBI code RABBIT into the discharge control system of ASDEX Upgrade

Nuclear Fusion, 2023
For the first time, a real-time capable NBI code, which has a comparable fidelity to the much more computationally expensive Monte Carlo codes such as NUBEAM, has been coupled to the discharge control system of a tokamak.
M. Weiland, R. Bilato, B. Sieglin, F. Felici, L. Giannone, O. Kudlacek, M. Rampp, M. Scheffer, W. Treutterer, T. Zehetbauer, the ASDEX Upgrade Team, the EUROfusion MST1 Team   +11 more
doaj   +1 more source

Fast ion conductors with rotating sulphate ions

Le Journal de Physique Colloques, 1980
X-ray and neutron diffraction studies of fcc Li2SO4 (575 to 860 °C for pure Li2SO4) show a high degree of spherical delocation of the sulphate ions. This strongly coupled rotation causes the dimensions of the cation positions to be varying all the time.
Aronsson, R., Jansson, B., Knape, H., Lundén, A., Nilsson, L., Sjöblom, C.-A., Torell, L.   +6 more
openaire   +2 more sources

Prospecting the protein design landscape

FEBS Letters, EarlyView.
This review outlines the current state of various protein design approaches. We discuss the current possibilities enabled by recently released tools, highlight future avenues to pursue in protein design, and underscore the crucial role of key databases and resources for successful protein design workflows.
Jakob R. Riccabona, Katharina T. Stonig, Jens Meiler, Clara T. Schoeder, Monica L. Fernández‐Quintero   +4 more
wiley   +1 more source