Search

Ultra-high dose rate radiation therapy (FLASH) based on proton irradiation is of major interest for cancer treatments but creates new challenges for dose monitoring. Amorphous hydrogenated silicon is known to be one of the most radiation-hard semiconductors. In this study, detectors based on this material are investigated at proton dose rates similar to or exceeding those required for FLASH therapy. Tested detectors comprise two different types of contacts, two different thicknesses deposited either on glass or on polyimide substrates. All detectors exhibit excellent linear behaviour as a function of dose rate up to a value of 20 kGy/s. Linearity is achieved independently of the depletion condition of the device and remarkably in passive (unbiased) conditions. The degradation of the performance as a function of the dose rate and its recovery are also discussed. • Application of amorphous silicon-based devices for proton dosimetry. • Suitability for FLASH proton radiotherapy. • Remarkable linearity as a function of dose rates up to a value of 20 kGy/s. • Limited change in device sensitivity up to total dose rates of 8 MGy. [ABSTRACT FROM AUTHOR]

X‐ray radiation is a leading cause of cancer, and thus a device that offers effective and real‐time radiation monitoring is of significant interest. The configuration design, fiber drawing, and device construction are introduced for a multimaterial fiber detector system that allows real‐time and remote X‐ray monitoring. A fiber detector embedded with metal–semiconductor–insulator ladder‐like configuration is designed and successfully constructed on the basis of Plateau–Rayleigh instability. The multimaterial design affords the detector robust radiation‐harvesting ability, enabling the collection of up to ≈88.13% of total X‐ray energy. The unique ladder‐like configuration allows the efficient generation and collection of free charges. Moreover, the detector exhibits excellent mechanical flexibility and can be woven into a complex configuration and even wearable fabrics. Finally, the application of the micro‐detector in real‐time wireless X‐ray monitoring is demonstrated. This research not only presents a flexible radiation detection strategy for various ionizing radiation types, such as X‐ray, gamma ray, and neutrons radiation, but also has potential uses in remote radiation monitoring in case a conventional rigid device is inapplicable. [ABSTRACT FROM AUTHOR]