scholarly journals Design and performance of the Beamlet laser third-harmonic frequency converter

Author(s):  
Charles E. Barker ◽  
Bruno M. Van Wonterghem ◽  
Jerome M. Auerbach ◽  
Richard J. Foley ◽  
John R. Murray ◽  
...  
1984 ◽  
Author(s):  
Burt C. Johnson ◽  
J. D. Williams ◽  
M. A. Summers ◽  
David Milam ◽  
R. C. Murray

2013 ◽  
Vol 21 (3) ◽  
pp. 3715 ◽  
Author(s):  
Valentin P. Gapontsev ◽  
Valentin A. Tyrtyshnyy ◽  
Oleg I. Vershinin ◽  
Boris L. Davydov ◽  
Dmitri A. Oulianov

2019 ◽  
Vol 34 (36) ◽  
pp. 1942040 ◽  
Author(s):  
Gabriele Bassi ◽  
Jüri Tagger

We discuss the longitudinal beam dynamics in storage rings in the presence of a higher-harmonic cavity (HHC) system for bunch lengthening. First, we review the general conditions for HHC operations, both in active or passive modes, assuming the stability of the system. For uniform filling patterns, a distinction is made between operations with a normal-conducting HHC, where optimal conditions for bunch lengthening can be satisfied, and operations with a super-conducting HHC, where optimal conditions can be met only approximately. Second, we discuss the option to operate the NSLS-II storage ring with a passive, super-conducting third harmonic cavity (3HC) system. The stability and performance of the system in the presence of a gap in the uniform filling, which corresponds to the present mode of operation of the NSLS-II storage ring, is investigated with self-consistent Vlasov–Fokker–Planck simulations performed with the code SPACE. [G. Bassi, A. Blednykh and V. Smaluk, Phys. Rev. Accel. Beams 19, 024401 (2016).]


2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Mohammad Saeid Ghaffarian ◽  
Gholamreza Moradi ◽  
Reza Zaker

Two wide rectangle-shaped microstrip-fed 2.6-GHz slot antennas using defected ground structures (DGSs) with a low design complexity are proposed to achieve wideband harmonic suppression. To accomplish this, two rectangular DGSs (RDGSs) in the first antenna and two circular DGSs (CDGSs) in the second one with various dimensions are etched into the ground plane, which could have a wideband-stop characteristic. Simulated and measured reflection coefficients indicate that the two proposed structures effectively suppress the second and third harmonics up to 23 dB between 3.5 and 10.5 GHz with a maximum ripple of 2.4 dB. In addition, the radiation patterns and peak gains of the antennas can be suppressed at least 17 dB and 7.1 dBi, respectively, at the third harmonic frequency of 7.86 GHz.


1991 ◽  
Author(s):  
Mark A. Henesian ◽  
Paul J. Wegner ◽  
David R. Speck ◽  
Camille M. Bibeau ◽  
Robert B. Ehrlich ◽  
...  

2005 ◽  
Vol 52 (5) ◽  
pp. 829-838 ◽  
Author(s):  
C.-W. Baik ◽  
S.-G. Jeon ◽  
D.-H. Kim ◽  
N. Sato ◽  
K. Yokoo ◽  
...  

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