A high efficiency, 10 kW TWT employing an electron beam velocity resynchronization technique

1974 ◽  
Author(s):  
D.B. Giguere
Keyword(s):  
Electron Beam ◽  
High Efficiency ◽  
Beam Velocity

High-efficiency electron-beam-pumped sub-240-nm ultraviolet emitters based on ultra-thin GaN/AlN multiple quantum wells grown by plasma-assisted molecular-beam epitaxy on c-Al2O3

2018 ◽  
Vol 11 (9) ◽  
pp. 091003 ◽  
Author(s):  
Valentin N. Jmerik ◽  
Dmitrii V. Nechaev ◽  
Alexey A. Toropov ◽  
Evgenii A. Evropeitsev ◽  
Vladimir I. Kozlovsky ◽  
...  
Keyword(s):  
Electron Beam ◽  
Molecular Beam Epitaxy ◽  
Quantum Wells ◽  
Molecular Beam ◽  
High Efficiency ◽  
Multiple Quantum Wells ◽  
Multiple Quantum

scholarly journals Использование многоканальных лазерных комплексов для создания некогерентной накачки в комптоновских лазерах на свободных электронах рентгеновского диапазона

2018 ◽  
Vol 44 (14) ◽  
pp. 3
Author(s):  
Н.С. Гинзбург ◽  
Е.Р. Кочаровская ◽  
М.Н. Вилков ◽  
А.С. Сергеев
Keyword(s):  
Electron Beam ◽  
Energy Spectrum ◽  
Relativistic Electron Beam ◽  
High Efficiency ◽  
Relative Width ◽  
Free Electron Lasers ◽  
High Current ◽  
Scattering Process ◽  
X Ray ◽  
Multichannel Laser

AbstractIt is used that there is great potential in the use of multichannel laser complexes for incoherent pumping of X-ray Compton free-electron lasers based on stimulated wave backscattering on high-current moderately relativistic electron beam. The relative width of the pump spectrum must be comparable with that of the energy spectrum of the electron beam, which ensures involvement of a significant fraction of particles into the scattering process and, hence, high efficiency of their kinetic energy conversion into X-ray radiation.

Influence of Electron-Beam Annealing Duration on MgB2 Film Superconductivity

2013 ◽  
Vol 745-746 ◽  
pp. 255-260
Author(s):  
Xiang Dong Kong ◽  
Qian Dai ◽  
Han Li ◽  
Qing Rong Feng ◽  
Ming Zhang Chu ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
High Efficiency ◽  
Beam Current ◽  
Annealing Duration ◽  
Zero Field ◽  
Superconducting Properties ◽  
Dense Structure ◽  
Novel Method ◽  
The Relationship

A novel method to fabricate Magnesium diboride ( MgB2) film by electron beam annealing was presented. The MgB2 thin films could be prepared in a second or sub-second without any toxic diborane gas, extra Mg vapor or argon gas. The method has the advantages of short formation time and high efficiency. Based on this, the relationship between MgB2 conductivity and electron beam annealing duration was investigated experimentally with an accelerating voltage of 40 × 103 V, a beam current of 3×103 A and different annealing durations of 0.1796s, 1860s, 0.2108s, 0.2200s and 0.2332s. The experimental results showed the MgB2 film with 0.2200s has the highest Tconset , the most dense structure and the strongest diamagnetic signal. Its zero-field Jc at 5 K was 5.0 × 106 A/cm2. Also the variation of the film superconducting properties with the annealing duration was found, it will provide an important reference for the preparation of high-quality MgB2 thin films.

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