Application of a genetic algorithm to unfold thermoluminescence dosimeter (TLD) glow curves for use during radiation measurements for X-FEL experiment in DESY, Hamburg

This thesis is a part of an effort to broaden the possibilities of measuring radiation doses in a mixed field radiation when using Thermoluminescent Dosimeters (TLD). The topic of study is Glow Curve of TLD that are sensitive to both neutrons and gammas. The Glow Curve has many overlapping peaks present, described by TL kinetics models. Since deconvolution can be described as a multidimensional search, the idea is to use a Genetic Algorithm to try to find out how each peak contributes to the whole curve. Main use of this research effects is to easily, quickly and cheaply evaluate the doses of neutrons and gammas in the Tesla Test Facility (TTF) tunnel housing the Vacuum Ultra- Violet Free-Electron Laser (VUV-FEL). Since the technology created and refined for VUV-FEL will be used in X-Ray Free-Electron Laser (X-FEL), the data obtained with this thesis' effects can be later used for estimation of expected radiation levels of X-FEL. It can also be used for estimation of radiation effects on electronics housed in the tunnel. Based on those estimations radiation shielding and mitigation techniques for electronics will be chosen. They can also be tested with fruits of this thesis. (Orig.)