Deve lopment of the TEA <CO_2> laser-pumped Submillimeter laser for ion temper ature measurement in high temperature plasma

高温等离子体中离子温度测量的TEA<CO_2>激光泵浦亚毫米激光器的研制

• 批准号: 60850012
• 负责人: OKADA Tatsuo
• 金额: $ 2.88万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60850012/
• 关键词: thermonuclear fusion; ion temperature; Thomson scattering; <CO_2> laser; submillimeter laser; injection-locking; 注入ロック; シングルモード; プラズマ計測

In order to perform the collective Thomson-scattering measurements of ion temperature of plasmas of thermonuclear interest, a high-power ( 1MW), narrow-band ( 100 MHz) and long-pulse (several hundreds ns) submillimeter laser is required. For the purpose, a <D_2O> laser pumped by a single-mode TEA <CO_2> laser has been developed. In a last few years, we have been mainly developing a single-mode TEA <CO_2> laser system based on an injection-locked scheme. The aim of this project is to develop a narrow-band <D_2O> submillimeter laser with an output-power of 100 mJ and a pulse duration of several hundreds of ns, with which the scattering experiment becomes possible against a high density laboratory plasma.Main results are as follows. (1) A single-mode TEA <CO_2> laser with an output-power of 30 J and a pulse-width of 1 s was developed based on an injection-locked scheme. (2) An output-energy of 120 mJ with a pulse-width of 800 ns and a spectral-width of less than 100 MHz was obtained from an unstable <D_2O> laser pumped by the <CO_2> laser.

为了进行热核等离子体离子温度的集体汤姆森散射测量，需要高功率（1MW），窄带（100 MHz）和长脉冲（数百ns）亚毫米激光器。为此，研制了由单模TEA <CO_2>激光器泵浦的<D_2O>激光器。在过去的几年中，我们主要开发了基于注入锁定方案的单模TEA <CO_2>激光系统。本课题的目标是研制一种窄带<D_2O>亚毫米激光器，其输出功率为100 mJ，脉冲持续时间为数百ns，使高密度实验室等离子体的散射实验成为可能。主要结果如下：(1)基于注入锁定方案，研制了输出功率为30 J、脉宽为1s的TEA <CO_2>单模激光器。(2)用<CO_2>激光器泵浦的不稳定<D_2O>激光器输出能量为120 mJ，脉冲宽度为800 ns，谱宽小于100 MHz。

项目成果

T.OKADA, S.INOUE, T.OHGA, K.MURAOKA, M.AKAZAKI: "An Injection-Locked Single-Mode TEA <CO_2> Laser for SMM Laser Pumping" International Journal of Infrared and Millimeter Waves. 6. 883-891 (1985)

T.OKADA、S.INOUE、T.OHGA、K.MURAOKA、M.AKAZAKI：“用于 SMM 激光泵浦的注入锁定单模 TEA <CO_2> 激光器”国际红外和毫米波杂志。

Tatsuo OKADA, Tetsuaki OHGA, Masakazu YOKOO, Katsunori MURAOKA, Masanori AKAZAKI: " <D_2O> Laser Pumped by an Injection-Locked <CO_2> Laser for Ion-Temperature Measurements" The Review of Laser Engineering. 14. 56-64 (1986)

Tatsuo OKADA、Tetsuaki OHGA、Masakazu YOKOO、Katsunori MURAOKA、Masanori AKAZAKI：“由注入锁定 <CO_2> 激光器泵浦的 <D_2O> 激光用于离子温度测量”激光工程评论。

レーザー研究. 8-1. (1986)

激光研究。8-1。

International Journal of Infrared and Millimeter Waves. 6-9. (1985)

国际红外和毫米波杂志。