scholarly journals Design, fabrication and investigation of a silicon subwavelength terahertz axicon

2019 ◽  
Vol 43 (5) ◽  
pp. 756-764 ◽  
Author(s):  
S.N. Khonina ◽  
K.N. Tukmakov ◽  
S.A. Degtyarev ◽  
A.S. Reshetnikov ◽  
V.S. Pavelyev ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Nuclear Physics ◽  
Budker Institute

A silicon subwavelengh terahertz axicon has been designed, fabricated, and investigated by methods of numerical and optical experiments. The research has been performed on a free-electron laser workstation NOVOFEL (Budker Institute of Nuclear Physics of SB RAS, Novosibirsk). Diffractive and polarization features of realized element have been investigated.

Thermocathode radio-frequency gun for the Budker Institute of Nuclear Physics free-electron laser

2016 ◽  
Vol 13 (7) ◽  
pp. 796-799 ◽  
Author(s):  
V. Volkov ◽  
Ya. Getmanov ◽  
E. Kenjebulatov ◽  
E. Kolobanov ◽  
S. Krutikhin ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Free Electron ◽  
Free Electron Laser ◽  
Nuclear Physics ◽  
Budker Institute

scholarly journals Imaging the He2quantum halo state using a free electron laser

2016 ◽  
Vol 113 (51) ◽  
pp. 14651-14655 ◽  
Author(s):  
Stefan Zeller ◽  
Maksim Kunitski ◽  
Jörg Voigtsberger ◽  
Anton Kalinin ◽  
Alexander Schottelius ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Quantum Tunneling ◽  
Nuclear Physics ◽  
Particle Density ◽  
Classical Mechanics ◽  
Helium Atoms ◽  
System A ◽  
Quantum Particles ◽  
Forbidden Region

Quantum tunneling is a ubiquitous phenomenon in nature and crucial for many technological applications. It allows quantum particles to reach regions in space which are energetically not accessible according to classical mechanics. In this “tunneling region,” the particle density is known to decay exponentially. This behavior is universal across all energy scales from nuclear physics to chemistry and solid state systems. Although typically only a small fraction of a particle wavefunction extends into the tunneling region, we present here an extreme quantum system: a gigantic molecule consisting of two helium atoms, with an 80% probability that its two nuclei will be found in this classical forbidden region. This circumstance allows us to directly image the exponentially decaying density of a tunneling particle, which we achieved for over two orders of magnitude. Imaging a tunneling particle shows one of the few features of our world that is truly universal: the probability to find one of the constituents of bound matter far away is never zero but decreases exponentially. The results were obtained by Coulomb explosion imaging using a free electron laser and furthermore yielded He2’s binding energy of151.9±13.3neV, which is in agreement with most recent calculations.

The HIγS Facility: A Free-Electron Laser Generated Gamma-Ray Beam for Research in Nuclear Physics

2003 ◽  
Vol 18 (23) ◽  
pp. 1569-1590 ◽  
Author(s):  
Henry R. Weller ◽  
Mohammad W. Ahmed
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Nuclear Physics ◽  
Gamma Ray ◽  
Primary Component ◽  
Joint Project ◽  
Polarized Beams ◽  
Back Scattering ◽  
Γ Rays ◽  
Flux Energy

The High Intensity Gamma-ray Source (HIγS) is a joint project between Triangle Universities Nuclear Laboratory (TUNL) and the Duke Free Electron Laser Laboratory (DFELL). This facility utilizes intra-cavity back-scattering of the FEL photons in order to produce a γ-flux enhancement of approximately 103 over the existing sources. At present, gamma-ray beams with energies ranging from 2 to 50 MeV are available with intensities of 105–107 γ/ s , energy spreads of 1% or better (with lower intensities), and 100% linear polarization. An upgrade is presently underway which will allow for the production of γ rays up to an energy of about 225 MeV having intensities in excess of 108 γ/ sec . The primary component of the upgrade is a 1.2 GeV booster-injector which will provide for efficient injection at any chosen operating energy of the storage ring from 300 MeV to 1.2 GeV. In addition, an upgrade of the present OK-4 FEL to a helical undulator system (OK-5) is underway. This new system has many advantages over the present one, including making switchable linear and circularly polarized beams available, an increase in power and a decrease in mirror-damaging radiation. The full system, including the booster injector, is expected to be ready for use by 2006. TUNL researchers, in collaboration with outside theoretical and experimental colleagues, have proposed a broad based research program in nuclear physics which is designed to exploit the unique flux, energy resolution and polarization of the HIγS beams. A description of the presently available facility and the anticipated facility following the present upgrades will be given in this review, along with a description of recent and planned experiments.

FAR INFRARED FREE ELECTRON LASER

1983 ◽  
Vol 44 (C1) ◽  
pp. C1-385-C1-385
Author(s):  
E. D. Shaw ◽  
R. M. Emanuelson ◽  
G. A. Herbster
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Far Infrared

FULLY QUANTIZED MANY PARTICLE THEORY OF A FREE-ELECTRON LASER

1983 ◽  
Vol 44 (C1) ◽  
pp. C1-367-C1-367
Author(s):  
W. Becker ◽  
J. K. McIver
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Particle Theory
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