Skip to main content
×
Home
    • Aa
    • Aa

Impedance matching condition analysis of the multi-filar tape-helix Blumlein PFL with discontinuous dielectrics

  • Y. Zhang (a1) and J.L. Liu (a1)
Abstract
Abstract

In this paper, the characteristic impedance matching of the inner line and outer line of the multi-filar tape-helix Blumlein pulse forming line (BPFL) is analyzed in detail by dispersion theory of tape helix. Analysis of the spatial harmonics of multi-filar tape-helix BPFL shows that the integer harmonic numbers of the excited spatial harmonics are not continuous. In addition, the basic harmonic component still dominates the dispersion characteristics of the multi-filar tape-helix BPFL at low frequency band. The impedance mismatching phenomenon caused by the discontinuity of filling dielectrics in the inner line of BPFL is studied as an important issue. Effects of dielectric discontinuity on the coupled electromagnetic fields and the parameters of the outer line are also analyzed. The impedance matching conditions are both obtained under the situations of continuous filling dielectric and discontinuous dielectrics, respectively. Impedance characteristics of these two situations are analyzed by comparison, and effects of the thickness of support dielectric on the impedance are also presented. When the 6 mm-thickness nylon support of the multi-filar tape helix is used in the filling dielectric of de-ionized water, the characteristic impedances of the inner line and outer line of BPFL are 53 Ω and 14.7 Ω, respectively. After the improvement about substituting de-ionized water by castor oil, the relative permittivities of the support dielectric and filling dielectric are almost the same, and the impedances of the inner and outer line of BPFL become 80 Ω and 79 Ω, respectively. That is to say, the impedance mismatching problem caused by dielectric discontinuity is solved. Circuit simulation and experimental results basically correspond to the theoretical results, and the fact demonstrates that impedance analysis of the multi-filar tape-helix BPFL based on dispersion theory is correct.

Copyright
Corresponding author
Address correspondence and reprint requests to: Jinliang Liu, College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, 410073. E-mail: ljle333@yahoo.com
References
Hide All
Cheng X.B., Liu J.L., Qian B.L. & Zhang J.D. (2009). Effect of transition section between the main switch and middle cylinder of Blumlein pulse forming line on the diode voltage of intense electron-beam accelerators. Laser Part. Beams 27, 439447.
Cheng X.B., Liu J.L. & Zhang Y. (2009). Effect of a transition section between the Blumlein line and a load on the output voltage of gigawatt intense electron-beam accelerators. Phys. Rev. 12, 110401.
Hartmann W., Roemheld M., Rohde K.D. & Spiess F.J. (2009). Large area pulsed corona discharge in water for disinfection and pollution control. IEEE Trans. Dielectr. Electr. Insul. 16, 10611065.
Hegeler F., McGeoch M.W., Sethian J.D., Sanders H.D., Glidden S.C. & Myers M.C. (2011). A durable gigawatt class solid state pulsed power system. IEEE Trans. Dielectr. Electr. Insul. 18, 12051213.
Johnson H.R., Everhart T.E. & Siegman A.E. (1956). Wave propagation on multifilar helices. IEEE Trans. Dielectr. Electr. 2, 1824.
Kino G.S. & Paik S.F. (1962). Circuit theory of coupled transmission system. J. Appl. Phys. 33, 30023008.
Kogelschatz U. (2003). Dielectric-barrier discharges: Their history, discharge physics, and industrial applications. Plasma Chem. Plasma Proces. 23, 4146.
Kompfner R. (1947). Traveling wave tube as amplifier at microwaves. I. R. E. 35, 124127.
Korovin S.D., Kurkan I.K., Loginov S.V., Pegel I.V., Polevin S.D., Vollkov S.N. & Zherlitsyn A.A. (2003). Decimeter-band frequency-tunable sources of high-power microwave pulses. Laser Part. Beams 21, 175185.
Laroussi M. (2005). Low temperature plasma-based sterilization: overview and state-of-the-art. Plasma Proc. Poly. 5, 391400.
Lewis I.A.D. & Wells F.H. (1959). Millimicrosecond Pulse Techniques. London: Pergarnon Press.
Liu J.L., Cheng X.B. & Qian B.L. (2009). Study on strip spiral Blumlein line for the pulsed forming line of intense electron-beam accelerators. Laser Part. Beams 27, 95105.
Liu J.L., Li C.L. & Zhang J.D. (2006). A spiral strip transformer type electron-beam accelerator. Laser Part. Beams 24, 355358.
Liu J.L., Yin Y. & Ge B. (2007 a). An electron-beam accelerator based on spiral water PFL. Laser Part. Beams 25, 593599.
Liu J.L., Zhan T.W. & Zhang J. (2007 b). A Tesla pulse transformer for spiral water pulse forming line charging. Laser Part. Beams 25, 305312.
Mesyats G.A., Korovin S.D. & Rostov V.V. (2004). The RADAN series of compact pulsed power generators and their applications. IEEE 92, 11661179.
Panousis E., Merbahi N., Clement F., Yousfi M., Loiseau J.F., Eichwald O. & Held B. (2009). Analysis of dielectric barrier discharges under unipolar and bipolar pulsed excitation. IEEE Trans. Dielectr. Electr Insul. 16, 734741.
Sensiper S. (1951). Electromagnetic Wave Propagation on Helical Conductors. Report No. 194. Cambridge: MIT.
Sensiper S. (1955). Electromagnetic wave propagating on helical structures: a review of survey of recent progress. I.R.E. 43, 149161.
Sethian J.D., Myers M. & Giuliani J.L. (2005). Electra: A repetitively pulsed, electron beam pumped KrF laser to develop the technologies for fusion energy. IEEE Pulsed Power Conference, 815.
Shimomura N., Nakano K., Nakajima H., Kageyama T. & Teranishi K. (2011). Nanosecond pulsed power application to nitrogen oxides treatment with coaxial reactors. IEEE Trans. Dielectr. Electr. Insul. 18, 12741280.
Sichak M. (1954). Coaxial line with helical inner conductor. I. R. E. 42, 13151319.
Teranishi T., Nojima K. & Motegi S. (1991). A 600 kV Blumlein modulator for an X-band klystron. IEEE Pulsed Power Conference, 315318.
Tien P.K. (1954). Bifilar helix for backward-wave oscillators. I.R.E. 42, 11371142.
Zhan H., Li C. & Xu J.B. (2007). Homogeneous dielectric barrier discharge in air for surface treatment. Annual conference on Electric Insulation and Dielectric Phenomena, 683686.
Zhang Y., Liu J.L., Fan X.L., Zhang H.B., Wang S.W. & Feng J.H. (2011 a). Characteristic impedance and capacitance analysis of Blumlein type pulse forming line of accelerator based on tape helix. Rev. Sci. Instr. 82, 104701.
Zhang Y., Liu J.L., Wang S.W., Fan X.L., Zhang H.B. & Feng J.H. (2011 b). Effects of dielectric discontinuity on the dispersion characteristics of the tape helix slow-wave structure with two metal shields. Laser Part. Beams 29, 459469.
Zhang Y., Liu J.L. & Feng J.H. (2012). Effects of dispersion on electromagnetic parameters of tape-helix Blumlein pulse forming line of accelerator. Euro. Physical J. Appl. Phys. 57, 30904.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Laser and Particle Beams
  • ISSN: 0263-0346
  • EISSN: 1469-803X
  • URL: /core/journals/laser-and-particle-beams
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 1
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 66 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 19th October 2017. This data will be updated every 24 hours.