Skip to main content

Advertisement

SpringerLink
Log in

Enhancement of charge breeding efficiency for rare isotope beam with the control of magnetic field profile and electron beam energy in EBIS

  • Research
  • Published:
Journal of Theoretical and Applied Physics

Abstract

The magnetic field in the ion trap of electron beam ion source (EBIS) determines the current density of electron beam and thus the depth of trap potential, which affects the charge breeding efficiency to desired charge state. An EBIS charge breeder has been constructed to be used for the Rare Isotope Science Project in Korea. A 6 T superconducting solenoid is used for the trap, and uniform magnetic field is extended with correction coils at the ends. The effect of field uniformity on the electron current density is evaluated using TRAK, and it is shown sizable improvement in the charge breeding efficiency for rare isotope beams can be obtained by elaborate magnetic design. Furthermore, the electron beam energy affects the ionization efficiency. The electron energy is often reduced in the trap for optimal matching with charge striping cross section. However, virtual cathode formation can appear in the process of energy reduction. Maximum beam currents limited by electron energy are studied analytically and by TRAK simulation in the view of improving the charge breeding efficiency.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9

Similar content being viewed by others

References

  1. Wenander, F.: Charge breeding of radioactive ions with EBIS and EBIT. J. Instrum. 5, C10004 (2010)

    Article  Google Scholar 

  2. Park, Y., Son, H., Kim, J.: Design of an EBIS charge breeder system for rare-isotope beams. J. Korean Phys. Soc. 69, 962–966 (2016)

    Article  ADS  Google Scholar 

  3. Son, H., Park, Y., Kondrashev, S., Kim, J., Kim, B., Chung, M.: Development of an EBIS charge breeder for the Rare Isotope Science project. Nucl. Instrum. Methods B 408, 334–338 (2017)

    Article  ADS  Google Scholar 

  4. Boussaid, R., Park, Y., Kondrashev, S.: Technical design of RISP RFQ cooler buncher. J. Korean Phys. Soc. 71, 848–854 (2017)

    Article  ADS  Google Scholar 

  5. Alessi, J., Beebe, E., Hershcovitch, A., Kponou, A., Prelec, K.: Progress in the BNL program for a RICH EBIS. Proc. of EPAC1996, pp. 1463–1465 (1996)

  6. Ostroumov, P., Barcikowski, A., Dickerson, C., Mustapha, B., Perry, A., Sharamentov, S., Vondrasek, R., Zinkaan, G.: Off-line commissioning of EBIS and plans for its integration into ATLAS and CARIBU. Rev. Sci. Instrum. 87, 02B506 (2016)

    Article  Google Scholar 

  7. See http://www.fieldp.com/ for Finite-element Software for Electromagnetics

  8. Pikin, A., Alessi, J., Beebe, E., Okamura, M., Raparia, D., Ritter, J., Snydstrup, L.: TANDEM EBIS Proc. of 12th HIAT, pp. 101–104 (2012)

  9. Breitenfeldt, M., Mertzig, R., Pitters, J., Shornikov, A., Wenander, F.: The twin EBIS setup: machine description. Nucl. Instrum. Methods A 856, 139–146 (2017)

    Article  ADS  Google Scholar 

  10. Kalinin, Y., Hramov, A.: Experimental and theoretical investigation into the effect of the electron velocity distribution on chaotic oscillations in an electron beam under virtual cathode formation conditions. Tech. Phys. 51, 558–566 (2006)

    Article  Google Scholar 

  11. Kondrashev, S., Kim, J., Park, Y., Son, H.: Advanced EBIS charge breeder for Rare Isotope Science Project. Proc. of IPAC2016, pp. 1304–1307 (2016)

  12. Zhao, L., Kim, J.S.: Simulation of ion beam injection and extraction in an EBIS. Rev. Sci. Instrum. 87, 02A908 (2016)

    Article  Google Scholar 

  13. Kurkin, S., Badarin, A., Koronivskii, A., Hramov, A.: The development and interaction of instabilities in intense relativistic electron beam. Phys. Plasma 22, 122110 (2015)

    Article  ADS  Google Scholar 

  14. Nezlin, M.: Physics of Intense Beams in Plasmas. Institute of Physics Publishing, Bristol (1993)

    Google Scholar 

Download references

Acknowledgements

The author would like to thank Mr. S. J. Heo and Drs. H. J. Son, Y. H. Park and T. S. Shin of the Institute for Basic Science for their helps in magnetic field measurement. This work is supported by the Ministry of Science, ICT and Future Planning (MSIP) and Technology and the National Research Foundation (NRF) of the Republic of Korea under Contract 2013MA1A1075764.

Author information

Authors and Affiliations

  1. Rare Isotope Science Project, Institute for Basic Science, Daejeon, 34000, Korea

    J. W. Kim

Authors
  1. J. W. Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to J. W. Kim.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Kim, J.W. Enhancement of charge breeding efficiency for rare isotope beam with the control of magnetic field profile and electron beam energy in EBIS. J Theor Appl Phys 14, 315–321 (2020). https://doi.org/10.1007/s40094-020-00388-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s40094-020-00388-z

Keywords

Search

Navigation