方案摘要
方案下载应用领域 | 能源/新能源 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
采用立陶宛Ekspla公司的SL系列高能皮秒激光器对国际热核聚变实验堆(ITER)计划相关靶材料样品进行了激光诱导击穿光谱学(LIBS)测量和研究。
ITER foresees applying laser induced breakdown spectroscopy (LIBS) as a tool for quantitative assessment of fuel retention in the first walls. One open problem related to LIBS application is the choice of the laser type. Here we compare two Nd/YAG lasers with different pulse durations, 0.15 and 8 ns, working at λ=1064 nm for LIBS studies of samples with D-doped W/Al coatings of≈3 μm thickness (Al is used as a proxy of Be) on Mo. Low pressure argon was used as a background gas. Experiments were done in conditions where other factors (broadening of spectral lines, signal-to-noise ratio, limited thickness of coatings etc.) did not shadow the effect of laser pulse duration. For these reasons, low pressure argon was used as the background gas and fluences were kept at comparatively low values. Spectra of laser-produced plasma were recorded as a function of the number of laser pulses.
Partially overlapping lines of hydrogen isotopes were fitted with Voigt contours, intensities were fitted and depth profiles of deuterium were reconstructed. The relative standard error of curve-fitting of spectra recorded with the laser of shorter pulse duration was two times smaller than that recorded by the longer pulse laser. The electron density was found from the Stark broadening of Hα line of the laser-produced plasma and the electron temperature of plasma was found on the basis W and Mo lines. It was found that in the case of ps laser an acceptable accuracy of the detection of deuterium was possible at considerably lower values of fluence. Steps needed for comparison of ps and ns lasers in ITER-relevant conditions were discussed.
在一个双稳湍流涡旋火焰中,对间歇性动态的时间-频率定位
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
相关产品
汽车光学检测系统AIS
PT403型波长可调谐皮秒激光器
ANL系列高能量高重复频率DPSS纳秒激光器
APL4206 系列高能量皮秒激光放大器
UltraFlux FF/FT 5000 高能量可调谐飞秒激光器系统
UltraFlux FT300型波长可调谐飞秒激光器系统
Ekspla 超高功率激光器系统SYLOS 2A
LaVision PTUx 可编程时间控制单元
LaVision 用于粒子成像测速PIV的相机
LaVision StrainMaser 全场应变测试系统组件
LaVision 用于数字图像相关DIC的相机
LaVision StrainMaster 数字图像相关分析软件包
LaVision 标定板
LaVision StrainMaster 形变应变成像测量系统
LaVision StrainMaster DVC 体视全场应变测量系统
关注
拨打电话
留言咨询