EGU2020-12082
https://doi.org/10.5194/egusphere-egu2020-12082
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The Deflection Magnet Design for PKU Energetic Particle Instrument

Weihong Shi1, Xiangqian Yu2, Yongfu Wang3, Linghua Wang4, Xin Huang5, and Zixuan Liu6
Weihong Shi et al.
  • 1Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,China (whshi@pku.edu.cn)
  • 2Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,China(yuxiangqian@pku.edu.cn)
  • 3Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,China(wyffrank@gmail.com)
  • 4Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,China(wanglhwang@pku.edu.cn)
  • 5Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,China(sess_hx@pku.edu.cn)
  • 6Institute of Space Physics and Applied Technology,School of Earth and Space Sciences,Peking University,China(liuzixuan1995@pku.edu.cn)

The Energetic Particle Instrument (EPI), proposed by Peking University for a L1 mission, is designed to provide the three-dimensional distribution of suprathermal electrons and ions with good time, energy and angular resolutions in the interplanetary space, respectively, at energies from 20 keV to 1 MeV and from 20 keV to 11 MeV.  The EPI consists of four dual-double-ended foil/magnet semi-conductor telescopes, which cleanly separate electrons in the energy range from 20 to 400 keV and ions from 20 keV to 6 MeV.

The magnet of semi-conductor telescopes consists of four type 677H rare earth permanent magnets and a soft iron frame. Due to the high saturation polarization and high magnetic anisotropy of the Nd2Fe14B strongly magnetic matrix phase, this system can make the magnetic field strong enough to make the electrons deflected.

A frame made of iron-cobalt alloy VACOFLUX 50 will be able to combine two pairs of magnets and cause the magnetic field to decay rapidly in the far field. In this way, the two air gaps in the system can simultaneously provide a deflecting magnetic field for a pair of anti-parallel sensor systems.

How to cite: Shi, W., Yu, X., Wang, Y., Wang, L., Huang, X., and Liu, Z.: The Deflection Magnet Design for PKU Energetic Particle Instrument, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12082, https://doi.org/10.5194/egusphere-egu2020-12082, 2020