Hostname: page-component-8448b6f56d-m8qmq Total loading time: 0 Render date: 2024-04-23T13:33:23.424Z Has data issue: false hasContentIssue false
  • English
  • Français

Output voltage waveform analysis of an intense electron beam accelerator based on strip spiral Blumlein line

Published online by Cambridge University Press:  10 July 2012

Xin-Bing Cheng ,
Jin-Liang Liu ,
Hong-Bo Zhang ,
Zhi-Qiang Hong  and
Bao-Liang Qian
Xin-Bing Cheng*
Affiliation:
College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, People's Republic of China
Jin-Liang Liu
Affiliation:
College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, People's Republic of China
Hong-Bo Zhang
Affiliation:
College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, People's Republic of China
Zhi-Qiang Hong
Affiliation:
College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, People's Republic of China
Bao-Liang Qian
Affiliation:
College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, People's Republic of China
*
Address correspondence and reprint request to: Xin-Bing Cheng, College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, 410073, People's Republic of China. E-mail: ljle333@yahoo.com
Get access Rights & Permissions [Opens in a new window]

Abstract

The Blumlein pulse forming line (BPFL) consisting of an inner coaxial pulse forming line (PFL) and an outer coaxial PFL is widely used in the field of pulsed power, especially for intense electron-beam accelerators (IEBA). The output voltage waveform determines the quality and characteristics of the output beam current of the IEBA. Comparing with the conventional BPFL, an IEBA based on a strip spiral type BPFL can increase the duration of the output voltage in the same geometrical volume. However, for the spiral type BPFL, the voltage waveform on a matched load may be distorted, which influences the electron-beam quality. In this paper, the output waveform of an IEBA based on strip spiral BPFL is analyzed. It is found that there is fluctuation on the flattop of the main pulse, and the flatness is increased with the increment of the output voltage. According to the time integrated pictures of the cathode holder during the operation of the IEBA, the electron emission of the cathode holder is one of the reasons to cause the variance of the flatness. Furthermore, the distribution of the current density of spiral middle cylinder of the BPFL is calculated by using electromagnetic simulation software, and it is obtained that the current density is not uniform, and which leads to the nonuniformity of the impedance of BPFL. Meanwhile, when the nonuniformity of the BPFL is taken into account, the operation of the whole accelerator is simulated using a circuit-simulation code called PSpice. It is obtained that the nonuniformity of the BPFL influences the flatness of the output voltage waveform. In order to get an ideal square pulse voltage waveform and to improve the electron beam quality of such an accelerator, the uniformity of the spiral middle cylinder should be improved and the electron emission of the cathode holder should be avoided. The theoretical analysis and simulated output voltage waveform shows reasonable agreement with that of the experimental results.

Keywords

Intense electron-beam acceleratorStrip spiral type Blumlein pulse forming lineVoltage waveformflatness
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 3 , September 2012 , pp. 379 - 385
Copyright
Copyright © Cambridge University Press 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Apruzese, J.P., Giuliani, J.L., Wolford, M.F., Sethian, J.D., Petrov, G.M., Hinshelwood, J.D., Myers, M.C.& Ponce, D.M. (2006). Experimental evidence for the role of Xe2+ pumping the Ar-Xe infrared laser. Appl. Phys. Lett. 88, 121120.CrossRefGoogle Scholar
Chernin, D., Antonsen, T.M. & Levush, B. (1999). Exact treatment of the dispersion and beam interaction impedance of a thin tape helix surrounded by a radially stratified dielectric. IEEE Trans. Plasma Sci. 46, 1472–1483.CrossRefGoogle Scholar
Clark, M.C., Mardar, B.M. & Bacon, L.D. (1988). Magnetically insulated transmission line oscillator. Appl. phys. Lett. 52, 78.CrossRefGoogle Scholar
Coogan, J.J., Davanloo, F. & Collins, C.B. (1990). Production of high-energy photons from flash X-ray sources powered by stacked Blumlein generators. Rev. Sci. Intrum. 61, 1448–1456CrossRefGoogle Scholar
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, 239–447.CrossRefGoogle Scholar
Cheng, X.B., Liu, J.L., Zhang, H.B., Feng, J.H. & Qian, B.L. (2010).Improving the output voltage waveform of and intense electron-beam accelerator based on helical type Blumlein pulse forming line. Phys. Rev. ST Accel. Beams 13, 070402.CrossRefGoogle Scholar
Cheng, X.B., Liu, J.L., Fan, X.L., Hong, Z.Q. & Qian, B.L. (2011). Electron emission of cathode holder of vacuum diode of an intense electron-beam accelerator and its effect on the output voltage. Phys. Rev. ST Accel. Beams 14, 040402.CrossRefGoogle Scholar
Friedman, S., Limpaecher, R. & Sirchis, M. (1988). Compact energy storage using a modified-spiral PFL. In Power Modulator Symposium. New York: IEEE.Google Scholar
Fan, Y.W., Zhong, H.H., Shu, T. & Li, Z.Q. (2008). Complex magnetically insulated transmission line oscillator. Phys. Plasmas 15, 083108.Google Scholar
He, J.T., Cao, Y.B., Zhang, J.D., Wang, T. & Ling, J.P. (2011). Design of a dual-frequency high-power microwave generator. Laser Part. Beams 29, 479–485.CrossRefGoogle Scholar
Kuai, B., Wu, G., Qiu, A., Wang, L., Cong, P. & Wang, X. (2009). Soft X-ray emissions from neon gas-puff Z-pinch powered by Qiang Guang-I accelerator. Laser Part. Beams 27, 569–577.CrossRefGoogle Scholar
Liu, J.L., Li, C.L., Zhang, J.D., Li, S. & Wang, X.X. (2006). A spiral strip transformer type electron-beam accelerator. Laser Part. Beams 24, 355–358.CrossRefGoogle Scholar
Liu, J.L., Yin, Y., Ge, B., Zhan, T.W., Cheng, X.B., Feng, J.H., Shu, T., Zhang, J.D. & Wang, X.X. (2007 a). An electron-beam accelerator based on spiral water PFL. Laser Part. Beams 25, 593–599.CrossRefGoogle Scholar
Liu, J.L., Zhan, T.W., Zhang, J., Liu, Z.X., Feng, J.H., Shu, T., Zhang, J.D. & Wang, X.X. (2007 b). A Tesla pulse transformer for spiral water pulse forming line charging. Laser Part. Beams 25, 305–312.CrossRefGoogle Scholar
Liu, J.L., Cheng, X.B., Qian, B.L., Ge, B., Zhang, J.D. & Wang, X.X. (2009). Study on strip spiral Blumlein line for the pulsed forming line of intense electron-beam accelerators. Laser Part. Beams 27, 95–102.CrossRefGoogle Scholar
Liu, R., Zou, X., Wang, X., He, L.& Zeng, N. (2008). X-pinch experiments with pulsed power generator(PPG-1) at Tsinghua University. Laser Part. Beams 26, 33–36.CrossRefGoogle Scholar
Phelps, D.A., Franklin, L., Homeyer, W., Nerem, A. & Overett, T. (1990). A compact high rep-rate pulse strip-Blumlein modulator. Power Modulator Symposium, 511–513.CrossRefGoogle Scholar
Robert, J.B. & Edl, S. (2001). High Power Microwave Sources and Technologies. Beijing: Tsinghua University Press.Google Scholar
Sethian, J.D., Myers, M., Smith, I.D., Carboni, V., Kishi, J., Morton, D., Pearce, J., Bowen, B., Schlitt, L., Barr, O. & Webster, W. (2000). Pulsed power for a rep-rate, electron beam pumped KrF laser. IEEE Trans. Plasma Sci. 28, 1333–1337.CrossRefGoogle Scholar
Yatsui, K., Shimiya, K., Masugata, K., Shigeta, M. & Shibata, K. (2005). Characteristics of pulsed power generator by versatile inductive voltage adder. Laser Part. Beams 23, 573–581.CrossRefGoogle Scholar
Zou, R., Liu, R., Zeng, N.G., Han, M., Yuan, J.Q., Wang, X.X. & Zhang, G.X. (2006). A pulsed power generator for X-pinch experiments. Laser Part. Beams 24, 503–509.CrossRefGoogle Scholar
Zhang, Y., Liu, J.L., Wang, S.W., Fan, X.L., Zhang, H.B. & Feng, J.H. (2011). Effects of dielectric discontinuity on the dispersion characteristics of the tape helix slow-wave structure with two metal shields. Laser Part. Beams 29, 459–469.CrossRefGoogle Scholar