Research and Development of analyses on radioactive waste by means of laser

放射性废物激光分析研究与进展

• 批准号: 13308025
• 负责人: HASEGAWA Shuichi
• 金额: $ 23.88万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13308025/
• 关键词: laser; isotope analysis; radioactive waste; 微量分析

We have proposed the novel method of analyses on radioactive waste by means of laser and developed the apparatus to achieve the methodology. The following apparatus are developed. (1) The quadruple linear ion trap is developed. The ions that is generated by pulsed laser ablation are successfully trapped. (2) It is necessary to irradiate 397nm ultraviolet cw laser light to cool the ions. The bow-tie cavity with nonlinear crystal outside the laser was designed and developed. The stable ultraviolet light with enough power is obtained. (3) The wavelength, 866nm of the repumping laser (diode laser system) was stabilized with two methods, which used the modulation of the grating and the etalon, respectively. The better stabilization was performed with the modulation of the etalon. (4) Galvano spectroscopy was performed to obtain the absolute wavelengths of the resonance. The wavelengths of each laser system was controlled and obtained the resonance wavelengths. (5) The total system was built to perform laser cooling and the laser induced fluorescence was observed. With more efficient detection system, the laser cooling and single ion detection would be possible.

提出了利用激光分析放射性废物的新方法，并研制了实现该方法的装置。研制了下列装置。(1)研制了四重线性离子阱。脉冲激光烧蚀产生的离子被成功捕获。(2)需要用397nm紫外连续激光对离子进行冷却。设计并研制了激光器外部非线性晶体的领结腔。获得了功率足够的稳定紫外光。(3)分别采用光栅调制和标准子调制两种方法稳定了泵浦激光器（二极管激光系统）的波长866nm。通过对标准子的调制，实现了较好的稳定。(4)用Galvano光谱法获得共振的绝对波长。对每个激光系统的波长进行控制，得到共振波长。(5)建立总体系进行激光冷却，观察激光诱导荧光。利用更高效的探测系统，可以实现激光冷却和单离子探测。

项目成果

MT.Huang, L.Zhang, S.Hasegawa, SH.Southworth, L.Young: "Measurements of the electron-impact double-to-single ionization ratio using trapped lithium"PHYSICAL REVIEW A. 66:(1). 012715-012715-6 (2002)

MT.Huang、L.Zhang、S.Hasekawa、SH.Southworth、L.Young：“使用捕获的锂测量电子轰击双电离比与单电离比”物理评论 A.66：（1）。

H.Kurosawa, S.Hasegawa, A.Suzuki: "Plasma potential in the presence of an external electric field"Journal of Applied physics. 90. 3717-3719 (2001)

H.Kurosawa、S.Hasekawa、A.Suzuki：“存在外部电场时的等离子体电势”应用物理学杂志。

H.Kurosawa, S.Hasegawa, A.Suzuki: "Plasma potential in the presence of an external electric field"Journal of Applied physics. 90(8). 3713-3719 (2001)

H.Kurosawa、S.Hasekawa、A.Suzuki：“存在外部电场时的等离子体电势”应用物理学杂志。

Shuichi Hasegawa: "Construction on Tunable Diode Laser System"Journal of Japan Society for Design Engineering (Japanese). 37. 294-298 (2002)

长谷川修一：“可调谐二极管激光系统的构造”日本设计工程学会杂志（日语）。

H.Kurosawa, S.Hasegawa, A.Suzuki: "Ion extraction from a laser-ionized plasma produced between parallel plate cathodes and an anode above them"JOURNAL OF APPLIED PHYSICS. 91. 4818-4823 (2002)

H.Kurosawa、S.Hasekawa、A.Suzuki：“从平行板阴极和其上方的阳极之间产生的激光电离等离子体中提取离子”应用物理学杂志。