Limitation of cross-excitation instability in a relativistic Cerenkov generator with coaxial slow wave structure

Renzhen Xiao; Lijun Zhang; Tiezhu Liang; Yan Teng; Changhua Chen; Hao Shao; Guozhi Liu; Yuzheng Lin
May 2008
Physics of Plasmas;May2008, Vol. 15 Issue 5, p053107
Academic Journal
The operation in the cross-excitation instability regimes for relativistic backward wave oscillators has been reported and studied in some earlier papers. In the experiment of a relativistic Cerenkov generator with coaxial slow wave structure (CRCG), the cross-excitation instability has also been observed by us. In this paper, experimental results for the CRCG operating in this regime are given, and an explanation is provided to account for the appearance of the instability. Based on this explanation, two types of reflectors, i.e., coaxial Bragg reflectors and cutoff necks, are adopted to restrain the cross-excitation instability by increasing the reflection coefficient at the entrance of the coaxial slow wave structure.


Related Articles

  • Field theory of a terahertz staggered double-grating arrays waveguide Cerenkov traveling wave amplifier. Wenqiu Xie; Zicheng Wang; Fangming He; Jirun Luo; Ding Zhao; Qinglun Liu // Physics of Plasmas;Apr2014, Vol. 21 Issue 4, p1 

    Based on a rectilinear sheet electron beam propagating through the tunnel of a staggered doublegrating arrays waveguide (SDGAW) slow-wave structure (SWS), a three dimensional field theory for describing the modes and the beam-wave interaction is presented, in which the higher order terms inside...

  • Three-dimensional theory of the Cerenkov free-electron laser. Andrews, H. L.; Brau, C. A. // Journal of Applied Physics;5/15/2007, Vol. 101 Issue 10, p104904 

    We describe an analytical theory for the gain of a Cerenkov free-electron laser including diffraction of the optical beam in the direction transverse to the electron beam, parallel to the surface of the dielectric. Since the width of the optical beam depends on the gain, the usual cubic...

  • Relativistic Hartree-Bogoliubov description of nuclei at the drip-lines. Lalazissis, G. A.; Vretenar, D.; Ring, P. // AIP Conference Proceedings;2000, Vol. 529 Issue 1, p224 

    For nuclei close to the drip-lines the relativistic Hartree-Bogoliubov (RHB) model provides a unified and self-consistent description of mean-field and pairing correlations. The model has been applied in the analysis of the strong isospin dependence of the effective spin-orbit interaction and...

  • Radiation from and force acting on a point charge moving through a cylindrical hole in a conducting medium. De Zutter, D.; De Vleeschauwer, D. // Journal of Applied Physics;6/15/1986, Vol. 59 Issue 12, p4146 

    Determines the radiation from and the force acting on a point change and moving with relativistic velocity through a cylindrical hole in a conducting medium. Technical applications of the Cerenkov effect; Mathematical formulation of the problem; Calculation of scattered fields; Time dependence...

  • Relativistic heavy-ion physics without nuclear contact. Bertulani, Carlos; Baur, Gerhard // Physics Today;Mar94, Vol. 47 Issue 3, p22 

    Focuses on the investigation of nuclear collisions at relativistic energies. Theory; Relevance to astrophysics; Implications of the development of detection techniques; Excitation of giant resonances; Electromagnetic excitation; Production of particles.

  • Cherenkov Radiation by Particles Traversing the Background Radiation. Dremin, I. M. // JETP Letters;2/25/2002, Vol. 75 Issue 4, p167 

    High-energy particles traversing the Universe through cosmic microwave background radiation can, in principle, emit Cherenkov radiation. It is shown that the energy threshold for this radiation is extremely high and its intensity would be too low due to the low density of the �relic photons...

  • Cherenkov Detectors in Particle Physics. Akimov, Yu. K. // Physics of Atomic Nuclei;Jul2004, Vol. 67 Issue 7, p1385 

    The most impressive examples of the application of Cherenkov detectors in modern-physics experiments are considered.© 2004 MAIK “Nauka / Interperiodica”.

  • Relativistic Fe Kα Lines with XMM-Newton. Wilms, Jörn // AIP Conference Proceedings;2005, Vol. 801 Issue 1, p15 

    I give an overview of observations of relativistically broadened Kα lines with XMM-Newton. In addition to the canonical broad line source MCG—6-30-15, broad lines have now been seen in a variety of different active galaxies and also in Galactic sources. The interpretation of the line...

  • Exact solutions for the Tikekar superdense star. Maharaj, S. D.; Leach, P. G. L. // Journal of Mathematical Physics;Jan1996, Vol. 37 Issue 1, p430 

    We analyze a relativistic model for superdense stars proposed by Tikekar [R. Tikekar, J. Math. Phys. 31, 2454 (1990)]. In this model the hypersurfaces generated by {t = const} have the geometry of the 3-spheroid which gives the solutions a clear geometrical characterization. The solution of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics