Design and characterization of a single-channel microwave interferometer for the Helicon Physics Prototype eXperiment
文献类型：期刊论文
| 作者 | Li, X. L.1,2; Liu, Y.1 ; Xu, G. S.1; Zhou, T. F.1; Zhu, Y. L.3
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| 刊名 | FUSION ENGINEERING AND DESIGN
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| 出版日期 | 2021-11-01 |
| 卷号 | 172 |
| 关键词 | Interferometer Gaussian beam propagation Electron density measurement |
| ISSN号 | 0920-3796 |
| DOI | 10.1016/j.fusengdes.2021.112914 |
| 通讯作者 | Liu, Y.(liuyong@ipp.ac.cn) |
| 英文摘要 | A heterodyne interferometer for measuring the plasma electron density in Helicon Physics Prototype eXperiment (HPPX) has been developed and characterized in the laboratory. The heterodyne-type interferometer uses a probing beam of 85 GHz and a reference beam of 85.7 GHz by using two Gunn oscillators for facilitating frequency modulation. The cutoff density for this frequency is 8.96 x 10(19) m(-3) that is much higher than the nominal electron density of the HPPX plasmas. The maximum deflection angle due to the refraction effect is estimated to be 0.63. assuming a parabolic electron density profile, and the impact on the measurement is negligible for the plasmas with a size of 100 mm. Two identical HDPE lenses act as the vacuum windows, and the lenses working together with the transmitter and receiver horns, form a beam with the beam waist of about 20 mm located at the plasma center. The characterization results of the lens and the critical microwave components show good performance. The plasma electron density measurement results are in line with the expectation. Furthermore, the Signal to Noise Ratio (SNR) of the measurement is defined as SNR = 20lg((n) over bar (e)/S), where (n) over bar (e) and S are respectively the average electron density and the standard deviation of the signal, and the SNR is 80 dB. This demonstrates the system's capability of providing a clear and detailed density resolution. |
| 资助项目 | National Magnetic Confinement Fusion Science Program of China[2015GB101000] ; U.S. DOE[DE-FG02-99ER54531] |
| WOS研究方向 | Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000716370400006 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Magnetic Confinement Fusion Science Program of China ; U.S. DOE |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/126502]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Liu, Y. |
| 作者单位 | 1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Univ Calif Davis, Davis, CA 95616 USA |
| 推荐引用方式 GB/T 7714 | Li, X. L.,Liu, Y.,Xu, G. S.,et al. Design and characterization of a single-channel microwave interferometer for the Helicon Physics Prototype eXperiment[J]. FUSION ENGINEERING AND DESIGN,2021,172. |
| APA | Li, X. L.,Liu, Y.,Xu, G. S.,Zhou, T. F.,&Zhu, Y. L..(2021).Design and characterization of a single-channel microwave interferometer for the Helicon Physics Prototype eXperiment.FUSION ENGINEERING AND DESIGN,172. |
| MLA | Li, X. L.,et al."Design and characterization of a single-channel microwave interferometer for the Helicon Physics Prototype eXperiment".FUSION ENGINEERING AND DESIGN 172(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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