Speaker
Description
We have achieved a groundbreaking demonstration of utilizing FNDs as scintillators for imaging synchrotron-based EUV radiation. The carbon-based scintillator comprises an ensemble of NV0 centers serving as the primary source of light emission upon above-bandgap excitation (energy > 5.47 eV or wavelength < 227 nm) within the diamond matrix. These centers exhibit exceptional characteristics, including high photostability, minimal afterglow, and a fluorescence decay time of less than 30 ns.
Our research begins with the creation of a uniform thin film of FNDs, each approximately 100 nm in diameter, on an ITO-coated glass substrate via electrospray deposition. This film, about 1 µm in thickness, possesses non-hygroscopic properties, is compatible with vacuum environments, highly durable, and emits red fluorescence from the NV0 centers upon exposure to synchrotron radiation in the EUV region. We successfully capture and image the beam characteristics, encompassing dimensions, positions, intensity profiles, divergence, and pointing stability, of radiation at wavelengths of 13.5 nm on the fluorescent screen. These images are then recorded using a visible camera. Importantly, these operational principles and methodologies can be extended to the sensing and imaging of VUV and soft X-rays.
