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 ◽  
...  
2019 ◽  
Vol 43 (5) ◽  
pp. 756-764 ◽  
Author(s):  
S.N. Khonina ◽  
K.N. Tukmakov ◽  
S.A. Degtyarev ◽  
A.S. Reshetnikov ◽  
V.S. Pavelyev ◽  
...  

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.


1991 ◽  
Vol 27 (12) ◽  
pp. 2605-2612 ◽  
Author(s):  
C.G. Parazzoli ◽  
R.E. Rodenburg ◽  
J.B. Romero ◽  
J.L. Adamski ◽  
D.J. Pistoresi ◽  
...  

2016 ◽  
Vol 113 (51) ◽  
pp. 14651-14655 ◽  
Author(s):  
Stefan Zeller ◽  
Maksim Kunitski ◽  
Jörg Voigtsberger ◽  
Anton Kalinin ◽  
Alexander Schottelius ◽  
...  

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.


1989 ◽  
Author(s):  
C. M. Tang ◽  
P. Sprangle ◽  
A. Ting ◽  
B. Hafizi

2005 ◽  
Vol 32 (1) ◽  
pp. 83-93
Author(s):  
C. A. Thomas ◽  
J. I.M. Botman ◽  
C. Bruni ◽  
G. Orlandi ◽  
G. de Ninno ◽  
...  

2022 ◽  
Vol 12 (2) ◽  
pp. 626
Author(s):  
Norihiro Sei ◽  
Heishun Zen ◽  
Hideaki Ohgaki

Spectra of coherent edge radiation (CER) were observed at the S-band linac facility of Kyoto University Free Electron Laser. A local maximum was observed in the CER spectrum on-crest operation of the radio frequency (RF) field. As the phase of the RF field was shifted from the crest, the frequency of the maximum decreased, and the CER spectrum approached a spectrum of Gaussian-distributed electrons in a bunch. It was found that this strange spectrum can be explained by a model in which a satellite pulse exists around a main pulse in the electron bunch. Furthermore, it demonstrated that CER is an effective tool for monitoring the shape of the electron bunch.


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