Measurement of electron and neutral particle densities using a two-color optical fiber interferometer
A two-color homodyne Mach-Zehnder optical fiber interferometer is developed for the measurement of electron and neutral particle densities in a high-density capsule θ-pinch device. The interferometer leverages the disparate contributions of distinct particles to the refractive index across two discrete wavelengths of 1310 and 1550 nm and incorporates the contributions of both electron and neutral particle densities to the phase shift in the plasma. The temporal evolutions of line-integrated electron and neutral argon densities are successfully measured by the interferometer. Comparing the electron density waveforms under various working gas pressures as well as the results obtained using the monochromatic and two-color measurements, it is inferred that the influence of neutral particle density can be neglected when measuring the electron density using a long-wavelength laser. Moreover, the maximum electron density is linearly correlated with the capacitor bank voltage for the θ-pinch device (5-9 kV). Overall, the proposed interferometer is capable of simultaneously measuring the electron and neutral particle densities.
Authors
- Zhengwei Wu (ORCID: https://orcid.org/0000-0002-3500-5990)
- Yuhua Huang (ORCID: https://orcid.org/0000-0001-9610-2113)
- Chen CHEN (ORCID: https://orcid.org/0000-0002-1072-4999)
- Adi Liu (ORCID: https://orcid.org/0000-0002-3164-7320)
- Jie Wu (ORCID: https://orcid.org/0000-0001-9755-8761)
- C. Xiao (ORCID: https://orcid.org/0000-0002-1024-6253)
- Chu Zhou (ORCID: https://orcid.org/0000-0003-2928-242X)
- Jinlin Xie (ORCID: https://orcid.org/0000-0002-8902-672X)
- Zian Wei (ORCID: https://orcid.org/0000-0003-4923-7829)
- Qilong Dong (ORCID: https://orcid.org/0009-0000-1529-4310)
- Wenzhe Mao (ORCID: https://orcid.org/0000-0002-0676-8462)
- Wandong Liu (ORCID: https://orcid.org/0000-0003-3526-5079)
- Yongkang Zhou
- Tianxiong Wang (ORCID: https://orcid.org/0000-0002-8134-1418)
- Weixing Ding (ORCID: https://orcid.org/0000-0003-2363-405X)
- Xuan Sun (ORCID: https://orcid.org/0000-0002-8338-3654)
- Tao Lan (ORCID: https://orcid.org/0000-0002-2785-5178)
- Xiaohui Wen
- Hong Li (ORCID: https://orcid.org/0000-0002-4235-4101)
- Sen Zhang (ORCID: https://orcid.org/0000-0002-7193-7744)
- Pengcheng Lu
- Hai Wang (ORCID: https://orcid.org/0000-0002-3690-1578)
- G. Zhuang (ORCID: https://orcid.org/0000-0002-6048-8568)
- Han Zhang (ORCID: https://orcid.org/0009-0007-6753-7135)
- Peng Deng
- Jiaren Wu
- Ke Wang (ORCID: https://orcid.org/0000-0001-5585-0369)
- Zeqi Bai
- Zhiling Mao
- Min Wang (ORCID: https://orcid.org/0009-0002-8756-0707)
Institutions
- University of Science and Technology of China (CN)
- University of Saskatchewan (CA)
Publication Details
- Journal
- Review of Scientific Instruments
- Published
- 2024-10-01
- DOI
- https://doi.org/10.1063/5.0212144
- Citations
- 1
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 0.66
Funders
- National Natural Science Foundation of China
- National Magnetic Confinement Fusion Program of China
- Fundamental Research Funds for the Central Universities