Conduction-Cooled Superconducting Magnet for Active-Target TPC Experiments at RAON

Shin Hyung Kim, Jung Keun Ahn

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A compact superconducting magnet was constructed for low-energy nuclear physics experiments at the RAON heavy-ion accelerator facility. Conduction-cooled Helmholtz coils with a radius of 40 cm generate a uniform magnetic field of up to 1.51 T at a current of 71 A. The magnet has two crossing beam windows that allows the beam to pass either parallel (solenoid mode) or perpendicular (dipole mode) to the field direction. The magnet operates at a ramping rate of 0.01 A/s without quenching and generates a highly uniform magnetic induction within 0.1% of the central value of 1.51 T over the volume of 10times 10times 10 cm^3 corresponding to the size of an active target time projection chamber. Herein, we report our first excitation test and field mapping results.

Original languageEnglish
Article number9222104
JournalIEEE Transactions on Applied Superconductivity
Issue number1
Publication statusPublished - 2021 Jan

Bibliographical note

Funding Information:
Manuscript received August 17, 2020; revised October 9, 2020; accepted October 9, 2020. Date of publication October 13, 2020; date of current version October 29, 2020. This work was supported in part by the National Research Foundation of Korea under Grants 2018R1A5A1025563, 2020R1A3B2079993, and 2020R1A6A3A13070680. This article was recommended by Associate Editor M. Parizh. (Corresponding author: Jung Keun Ahn.) The authors are with the Department of Physics, Korea University, Seoul 02841, South Korea (e-mail:;

Publisher Copyright:
© 2002-2011 IEEE.


  • Conduction cooling
  • Helmholtz coils
  • RAON
  • superconducting magnet

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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