한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)

  • 제17권3호
  • /
  • Pages.23-27
  • /
  • 2015
  • /
  • 1229-3008(pISSN)
  • /
  • 2287-6251(eISSN)
한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
권호 표지
DOI QR코드

DOI QR Code

Magnetic field characteristics from HTS quadruple magnet of in-flight separator for a heavy ion accelerator

  • 투고 : 2015.08.10
  • 심사 : 2015.09.23
  • 발행 : 2015.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Quadruple magnet is an essential component for the accelerator, and the field uniformity in the good field region reflects the quality of quadruple magnet. In this paper, the total magnetic field B was separated into the coil-induced magnetic field $B_s$ and the iron-induced magnetic field $B_c$ to explain why the total magnetic field B has some inhomogeneity. Using Fourier analysis, harmonic components of $B_s$, $B_c$ and B have been analyzed at good field region, respectively. The harmonics of multipole magnet and Fourier analysis are helpful to show the uniformity of magnetic field. Several geometries of yoke and coils were defined to analyze the effect on field uniformity of an HTS quadruple magnet. By the analysis, it was found that the sixth harmonics which is the main factor of field inhomogeneity can be reduced to zero. It means that the sixth harmonics of the magnetic field B can be removed by adjusting the geometry of the magnet pole and the position of coils. We expect that this result can effectively improve the uniformity of an HTS quadruple magnet.

키워드

참고문헌

  1. Liesbeth Vanherpe, Olivier Crettiez, Alexey Vorozhtsov and Thomas Zickler, "Quadrupole Electro-magnets for Linac4 at CERN," ATS Seminar, Boston, 2013.
  2. Ramesh Gupta, "Superconducting Magnets for Particle Accelerators," RISP, IBS, Korea, 2012.
  3. A. Kalimov, P. Nalimov, "Pole Shape Optimization in Multipole Magnet," Recent Advances in Mathematical Methods in Applied Sciences, pp.358, 2014.
  4. A. Kalimov, P. Nalimov, "Optimization of the Pole Shape of Quadrupole Magnets by MULTIMAG," IEEE Trans. App. Supercond., vol. 16, pp.1282, 2006. https://doi.org/10.1109/TASC.2005.864356
  5. Andy Wolski, "Maxwell's Equations for Magnets--Part II: Realistic Fields," CAS Specialized Course on Magnets, Bruges, Belgium, pp.34, 2009.
  6. J. J. Muray, "Effective Length Measurement for Quadrupole Magnets," SLAC-TN-63-010, 1963.

피인용 문헌

  1. Harmonic analysis and field quality improvement of an HTS quadrupole magnet for a heavy ion accelerator vol.18, pp.2, 2016, https://doi.org/10.9714/psac.2016.18.2.021
  2. Comparative Study of Magnetic Characteristics of Air-Core and Iron-Core High-Temperature Superconducting Quadrupole Magnets vol.28, pp.3, 2018, https://doi.org/10.1109/TASC.2017.2786254
  3. A Study on the Optimization of an HTS Quadrupole Magnet System for a Heavy Ion Accelerator Through Evolution Strategy vol.26, pp.4, 2016, https://doi.org/10.1109/TASC.2016.2516907
  4. Control the length of beam trajectory with a quadruple triplet for heavy ion accelerator vol.18, pp.4, 2016, https://doi.org/10.9714/psac.2016.18.4.040
  5. Design of an Air-Core HTS quadruple triplet for a heavy ion accelerator vol.18, pp.4, 2016, https://doi.org/10.9714/psac.2016.18.4.035