Laser Ionisation Spectroscope

激光诱导电离光谱学是最古老的激光应用之一。无需特殊的样品制备，即可对固体、液体和气体物质的化学成分进行分析和测定；此外，它具有低检测限。这使得该方法在表面分析中成为一个强大而可靠的工具。此外，新的信号评估方法可以测量最低的化学变化和主要成分甚至微量元素的量化，而无需任何校准。由于激发是通过聚焦激光辐射进行的，因此可以很容易地实现高横向分辨率和深度分辨率，例如用于三维元素映射。通过在确定的环境中测量气体成分和压力，可以消除干扰等离子体诱导的影响，如谱线的自吸收，从而提高评估精度。激光电离分光镜的所有这些独特的卖点都允许分析由表面改性引起的各种材料或现象。例如，特异性诱导的化学计量变化可以被检测和量化。该设备的设计是激光安全等级1的封闭系统，可以快速安全地分析大量样品。由于这些测量原理的优势和独特的卖点，所需的激光电离分光镜代表了HAWK研究重点激光和等离子体技术分析可能性的重要扩展。在大多数情况下，有必要在许多不同样品材料的表面上检测最小的化学变化。因此，所提出的系统对研究小组各个研究领域的相互作用机制的理解作出了很大的贡献。

Laser-induced ionisation spectroscopy is one of the oldest laser applications. It allows the analysis and determination of the chemical composition of solid, liquid and gaseous substances without special sample preparation; further, it has a low detection limit. This makes the method a powerful and robust tool in surface analysis. In addition, novel approaches of signal evaluation enable the measurement of lowest chemical changes and the quantification of main components and even trace elements without any calibration. As the excitation is performed by means of focused laser radiation, a high lateral resolution and depth resolution, e.g. for three-dimensional element mapping, can be easily realised. By measurements in defined environments with respect to gas composition and pressure, disturbing plasma-induced effects such as self-absorption of spectral lines can be eliminated, resulting in an increased evaluation accuracy. All these unique selling points of a laser ionisation spectroscope allow the analysis of a wide range of materials or phenomena caused by surface modification. For example, specifically induced stoichiometric changes can be detected and quantified. The design of the device as a closed system of laser safety class 1 allows a fast and safe analysis of large sample quantities. Due to these measuring principle-specific advantages and unique selling points, the required laser ionisation spectroscope represents an essential extension of the analysis possibilities in the research focus laser and plasma technology at the HAWK. In most cases, the detection of smallest chemical changes on surfaces of a multitude of different sample materials is necessary. Thus, the proposed system contributes considerably to the understanding of interaction mechanisms in the individual research fields of the research group.