Laser Ionisation Spectroscope

激光诱导电离光谱是最古老的激光应用之一。它可以分析和测定固体、液体和气体物质的化学成分，无需特殊的样品制备;此外，它的检测限很低。这使得该方法在表面分析中成为强大而强大的工具。此外，新的信号评估方法可以测量最低的化学变化，并在没有任何校准的情况下量化主要成分甚至痕量元素。由于通过聚焦的激光辐射执行激发，因此可以容易地实现例如用于三维元件映射的高横向分辨率和深度分辨率。通过在特定环境中测量气体成分和压力，可以消除干扰等离子体引起的效应，如光谱线的自吸收，从而提高评估精度。激光电离光谱仪的所有这些独特的卖点允许分析各种材料或表面改性引起的现象。例如，可以检测和定量特异性诱导的化学计量变化。该设备设计为激光安全等级1的封闭系统，可快速安全地分析大量样品。由于这些测量原理特有的优势和独特的卖点，所需的激光电离光谱仪代表了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，需要检测大量不同样品材料表面上的最小化学变化。因此，所提出的系统大大有助于理解的相互作用机制，在个别研究领域的研究小组。

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.