7th Asia-Pacific Conference on Plasma Physics, 12-17 Nov, 2023 at Port Messe Nagoya

Diagnostics design for three-dimensional magnetic field measurements inSPERF experiments
Qingmei Xiao1,2,3, Xiaogang Wang2,3, Aohua Mao1,2,3, Xiaoyi Yang2,3, Peng E1, Liyi Li1
1

Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin
150006, People’s Republic of China
2
School of Physics, Harbin Institute of Technology, Harbin 150006, People’s Republic of China
3
Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology, Harbin
Institute of Technology, Harbin 150006, People’s Republic of Chinae-mail (speaker): qmxiao@hit.edu.cn

The Space Plasma Environment Research Facility(SPERF), an important component of Space
Environment Simulation Research Infrastructure(SESRI), is a ground experimental platform to
reproduce the near earth magnetosphere forinvestigating
fundamental
processes
duringinteractions between solar wind and Earth’smagnetosphere, such as energetic particles
transportation and the interaction with waves inmagnetosphere, and also the three dimensional
magnetic reconnection at magnetopause andmagnetotail. The facility has three subsystems,
Asymmetric Reconnection EXperiment (AREX),
Dipole Research EXperiment (DREX), and Tail
Research EXperiment (T-REX). AREX is mainly
focused on the three dimensional (3D) daysidemagnetopause reconnection [1], and DREX mainly
investigates acceleration/loss and wave-particle
interaction of energetic particles and also the influenceof magnetic storms on the inner magnetosphere [2],while T-REX mainly investigates the hydromagnetic
waves excited by high speed flows and thedipolarization process, as well as 3D magnetic
reconnection processes. The schematic of SPERF isshown in Figure 1. The plasma is produced by anelectron cyclotron resonance (ECR) source to generatea background “artificial radiation belt” and seedelectrons, and then enhanced by a biased cold cathodeto generate the plasma in high density [3]. In addition,
a hot cathode (LaB6) plasma source is also used toproduce plasma with high density.
The diagnostics are essential parts for SPERF toachieve its scientific goals. As for the diagnostic, twokinds of probes, including electrostatic probes andmagnetic probes, and also interferometer, including
HCN interferometer and polarization interferometer,
as well as spectroscopy and high speed camera will beapplied to diagnose the equilibrium and fluctuation
parameters of plasma during different physicalprocesses in SPERF.

Excellent port access (several 1500×150 mm andmore than three hundreds of Φ160 mm) and high laser
power of interferometers would promise a profile
measurement across the whole plasma section withgood quality. In this work, a detailed diagnostics
design for three-dimensional magnetic fieldmeasurements as well as some preliminary results in
SPERF experiment will be presented.

Figure 1 The schematic of SPERF device with AREX,DREX and T-REX shown
References[1] A.H. Mao, Y. Ren, H.T. Ji, P. E, K. Han, Z.B. Wang,Q.M. Xiao, L.Y. Li, Plasma Sci. Technol. 19 (2017)
034002.
[2] Q.M. Xiao, Z.B. Wang, X.G. Wang, C.J. Xiao, X.Y.
Yang, J.X. Zheng, Plasma Sci. Technol. 19 (2017)035301.
[3] Q.M. Xiao, Z.B. Wang, X.G. Wang, et al., Plasma Sci.
Technol. 19 (2017) 055302.