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

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。

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.