@inproceedings{DoehringKrivanekovaPregleretal.2025, author = {D{\"o}hring, Thorsten and Krivanekova, Lucia and Pregler, Jan and Hildenbrand, Georg}, title = {Radiation measurements in the stratosphere by the balloon experiment ASTRABAX}, series = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, volume = {2025}, booktitle = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, number = {13531}, editor = {Hudec, Ren{\´e} and Pina, Ladislav}, publisher = {SPIE}, doi = {10.1117/12.3056175}, pages = {1353109-1 -- 1353109-11}, year = {2025}, abstract = {Stratospheric balloons are a platform of choice for meteorology, climate and atmospheric research, offering some advantages over sounding rockets and satellites. The Aschaffenburg Stratospheric Balloon Experiment (ASTRABAX) carries out experiments on material treatments and life sciences under the extreme radiation exposures at high altitude. The pioneer ASTRABAX flight took place mid of October 2024 in Germany. Measurements examined the UV spectral region by a miniature spectrometer and captured secondary cosmic rays employing a Geiger counter. Additional experiments assessed irradiation effects on polydopamine X-ray mirror coatings. The platform also carried samples of biological cells to evaluate effects of exposure to low-dose irradiation of high-energy particles, gamma rays and UV radiation simultaneously. Biological experiments under such realistic conditions are relevant for genetic research on Earth, for human space flights as well as for the understanding of astrobiological processes.}, subject = {Stratosph{\"a}ren-Ballon}, language = {en} } @inproceedings{Doehring2017, author = {D{\"o}hring, Thorsten}, title = {Critical discussion on the UV absorption properties of Earth's atmosphere}, series = {Proceedings of SPIE}, volume = {2017}, booktitle = {Proceedings of SPIE}, number = {10453}, publisher = {SPIE}, organization = {Hochschule Aschaffenburg}, doi = {10.1117/12.2271645}, pages = {104530I-1 -- 104530I-10}, year = {2017}, abstract = {Sun´s ultraviolet radiation is classified into UV-A, UV-B, and UV-C bands. Thereby UV-A passes through Earth´s atmosphere, while UV-B is partially absorbed by ozone. The limitations of the commonly accepted statement, that UV-C is always completely absorbed by Earth´s atmosphere, are discussed critically. Below 200 nm the solar spectrum is strongly absorbed by molecular oxygen. The stratospheric ozone layer has strong absorption between 200 nm and 300 nm. However, the "ozone hole" increases UV-B radiation just below 300 nm and may also open a transmitting atmospheric window for harmful UV-C at the overlap region between oxygen absorption and ozone absorption.}, subject = {Ozonloch}, language = {en} }