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Öğe The Development of an Argon Light Source for Calibration and Quality Control of Liquid Argon Light Detectors(Institute of Electrical and Electronics Engineers Inc., 2022) Tosun M.; Bilki B.; Sahbaz K.K.Future large-scale neutrino and dark matter experiments will mostly use liquid argon detectors. Since liquid argon is a very effective scintillator, light sensing systems are included in these experiments. The wavelength of liquid argon scintillation is 127 nm. For this reason special light detectors based on wavelength shifters have been produced to measure this wavelength, and recently photodetectors sensitive to deeper UV. Nonetheless, the effective calibration and quality assurance of these recently developed detectors remain an ongoing challenge. In response to this requirement, we have created an argon-based light source that relies on plasma generation and light transmission via an MgF2 window. This light source is designed to be compact, portable, and user-friendly, allowing for the practical evaluation of the performance attributes of light detectors of several square meters in size. In this report, we detail the progression of the light source's development and outline its performance attributes. © 2022 IEEE.Öğe Investigation of LED Stimulated Recovery of Radiation Damage in Optical Materials(Institute of Electrical and Electronics Engineers Inc., 2021) Sahbaz K.K.; Bilki B.; Dapo H.; Karslioglu G.; Kaya C.; Kaya M.; Tosun M.The radiation damage in the optical active media of collider detectors and beamline instrumentation is an outstanding problem. The exposed doses reach unprecedented levels in some current and projected implementations. In order to mitigate this, the development of optical materials with higher radiation resistance is underway. On the other hand, there is a significant lack of in-situ radiation damage recovery systems, whereas such systems have the potential to increase the useful lifetime of the optical materials considerably. Although it is well-known that stimulating the recovery of radiation damage with LED illumination significantly improves the recovery rate and the ultimate damage, a systematic study of the recovery e.g. as a function of the incident LED light spectra, intensity and exposure duration has not been performed. Here we attempt to do this study and present our first results of recovery from radiation damage under different recovery conditions. © 2021 IEEE.Öğe Systematic Investigation of LED Stimulated Recovery From Radiation-Induced Damage in Optical Materials(Institute of Electrical and Electronics Engineers Inc., 2022) Sahbaz K.K.; Bilki B.; Dapo H.; Karslioglu I.G.; Kaya C.; Kaya M.; Tosun M.The optical materials including scintillators, glasses and crystals are commonly used as active or support media in collider detectors and in beam-lines of various scientific facilities. When subjected to high levels of radiation, the optical materials exhibit loss of transmittance which degrades their overall performance. If the radiation exposure is stopped, the optical materials can gradually recover from radiation damage. The recovery can also be accelerated by LED stimulation, which provides a potential option for in-situ recovery systems from radiation damage in large-scale detector systems. On the other hand, a systematic study of the recovery from radiation damage as a function of the LED stimulation parameters has not been conducted to date. In order to respond to this need, we irradiated soda lime glass samples to 3.5 kGy and 7.0 kGy total doses and inspected their recovery from radiation damage under different LED stimulation conditions for an extended period. Here we report on the irradiation and recovery setups in detail and report on the dynamic recovery from radiation damage for various LED stimulation scenarios. © 2022 IEEE.
