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A.A. Varfolomeev
Researcher at Kurchatov Institute
Publications - 59
Citations - 502
A.A. Varfolomeev is an academic researcher from Kurchatov Institute. The author has contributed to research in topics: Undulator & Free-electron laser. The author has an hindex of 12, co-authored 59 publications receiving 482 citations.
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Journal ArticleDOI
Measurements of Gain Larger than 10 5 at 12 mm in a Self-Amplified Spontaneous-Emission Free-Electron Laser
Mark Hogan,Claudio Pellegrini,James Rosenzweig,Sue Anderson,Pedro Frigola,Aaron Tremaine,C.M. Fortgang,Dinh C. Nguyen,Richard L. Sheffield,J.M. Kinross-Wright,A.A. Varfolomeev,A. A. Varfolomeev,S.V. Tolmachev,Roger Carr +13 more
TL;DR: In this paper, the authors reported very large output intensities corresponding to a gain larger than 10sup 5 for a single pass free-electron laser operating in the self-amplified spontaneous emission (SASE) mode at 12 µm.
Journal ArticleDOI
Design of the 1 MW, 200 GHz, FOM fusion FEM
W.J. Urbanus,R.W.B. Best,W.A. Bongers,A.M. van Ingen,P. Manintveld,A.B. Sterk,A.G.A. Verhoeven,M.J. van der Wiel,M. Caplan,V. L. Bratman,G. G. Denisov,A.A. Varfolomeev,A.S. Khlebnikov +12 more
TL;DR: In this article, the main components of the free-electron maser, the electron beam line, the undulator and the millimetre-wave system are described, which are optimized with the help of a fully 3D, particle-pusher, FEM simulation code.
Journal ArticleDOI
High energy gain of trapped electrons in a tapered, diffraction-dominated inverse-free-electron laser.
Pietro Musumeci,S. Ya. Tochitsky,Salime Boucher,C. E. Clayton,A. Doyuran,R. J. England,C. Joshi,Claudio Pellegrini,Joseph Ralph,J. B. Rosenzweig,C. Sung,S.V. Tolmachev,Gil Travish,A.A. Varfolomeev,T. Yarovoi,R. B. Yoder +15 more
TL;DR: Energy gain of trapped electrons in excess of 20 MeV has been demonstrated in an inverse-free-electron-laser (IFEL) accelerator experiment and the structure in the measured energy spectrum arises because of higher harmonic IFEL interaction in the second half of the undulator.
Journal ArticleDOI
High-power electrostatic free-electron maser as a future source for fusion plasma heating: experiments in the short-pulse regime.
W.H. Urbanus,W.A. Bongers,C.A.J. van der Geer,P. Manintveld,Jeroen Plomp,J. Pluygers,A.J. Poelman,P.H.M. Smeets,A.G.A. Verhoeven,V. L. Bratman,G. G. Denisov,Andrey V. Savilov,M Y Shmelyov,M. Caplan,A.A. Varfolomeev,S V Tolmachev,S.N. Ivanchenkov +16 more
TL;DR: A high-power, frequency-tunable electrostatic free-electron maser, being developed at the FOM Institute for Plasma Physics "Rijnhuizen," shows lasing at various frequencies and the main issues, such as the possibility of high- power, single-mode operation and frequency tuning, have been confirmed.
Journal ArticleDOI
Wire method for magnetic field measurements in long undulators
A.A. Varfolomeev,Yu.P. Bouzouloukov,S.N. Ivanchenkov,A.S. Khlebnikov,N.S. Osmanov,S.V. Tolmachev +5 more
TL;DR: In this article, an effective and simple wire-position detector providing accuracy up to 1 μm was designed and tested, which can be applied to undulators with a length up to several meters.