Development of a combined interferometer using millimeter wave solid state source and a far infrared laser on ENN’s XuanLong-50 (EXL-50)

doi:10.1088/2058-6272/ac5e72

	Development of a combined interferometer using millimeter wave solid state source and a far infrared laser on ENN’s XuanLong-50 (EXL-50)
	XIE,Jiaxing 1,2; WEI,Xuechao 2; LIU,Haiqing 2; LI,Songjian 4; ZHANG,Jibo 2; YAO,Yuan 2; WANG,Yunfei 2,3; JIE,Yinxian 2
刊名	Plasma Science and Technology
	2022-05-26
卷号	24
关键词	plasma diagnostics—interferometry spectroscopy and imaging nuclear instruments and methods for hot plasma diagnostics
ISSN号	1009-0630
DOI	10.1088/2058-6272/ac5e72
通讯作者	WEI,Xuechao()
英文摘要	Abstract A millimeter wave solid state source—far infrared laser combined interferometer system (MFCI) consisting of a three-channel 890 GHz hydrogen cyanide (HCN) laser interferometer and a three-channel 340 GHz solid state source interferometer (SSI) is developed for real-time line-integrated electron density feedback and electron density profile of the EXL-50 spherical tokamak device. The interferometer system is a Mach–Zehnder type, with all probe-channels measured vertically, covering the plasma magnetic axis to the outermost closed magnetic plane. The HCN laser interferometer uses an HCN laser with a frequency of 890 GHz as a light source and modulates a 100 kHz beat signal by a rotating grating, giving a temporal resolution of 10 μs. The SSI uses two independent 340 GHz solid-state diode sources as the light source, the frequency of the two sources is adjustable, and the temporal resolution of SSI can reach 1 μs by setting the frequency difference of the two lasers at 1 MHz. The main optical path of the two interferometers is compactly installed on a set of double-layer optical platform directly below EXL-50. Dual optical path design using corner cube reflectors avoids the large support structures. Collinear the probe-beams of two wavelengths, then the phase error caused by vibration can be compensated. At present, the phase noise of the HCN Interferometer is 0.08 rad, corresponding to a line-integrated electron density of 0.88?×?1017 m?2, one channel of measuring result was obtained by the MFCI system, and the highest density measured is about 0.7?×?1019 m?2.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:PST_24_6_064004
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/129645]
专题	中国科学院合肥物质科学研究院
通讯作者	WEI,Xuechao
作者单位	1.University of Science and Technology of China, Hefei 230026, People’s Republic of China 2.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 3.Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan 4.ENN Science and Technology Development Co., Ltd, Langfang 065001, People’s Republic of China
推荐引用方式 GB/T 7714	XIE,Jiaxing,WEI,Xuechao,LIU,Haiqing,et al. Development of a combined interferometer using millimeter wave solid state source and a far infrared laser on ENN’s XuanLong-50 (EXL-50)[J]. Plasma Science and Technology,2022,24.
APA	XIE,Jiaxing.,WEI,Xuechao.,LIU,Haiqing.,LI,Songjian.,ZHANG,Jibo.,...&JIE,Yinxian.(2022).Development of a combined interferometer using millimeter wave solid state source and a far infrared laser on ENN’s XuanLong-50 (EXL-50).Plasma Science and Technology,24.
MLA	XIE,Jiaxing,et al."Development of a combined interferometer using millimeter wave solid state source and a far infrared laser on ENN’s XuanLong-50 (EXL-50)".Plasma Science and Technology 24(2022).