Pikuz Tatiana A, Faenov Anatoly Ya, Fukuda Yuji, Kando Masaki, Bolton Paul, Mitrofanov Alexander, Vinogradov Alexander V, Nagasono Mitsuru, Ohashi Haruhiko, Yabashi Makina, Tono Kensuke, Senba Yasunori, Togashi Tadashi, Ishikawa Tetsuya
Quantum Beam Science Directorate, Japan Atomic Energy Agency, Kizugawa, Kyoto, Japan.
Appl Opt. 2013 Jan 20;52(3):509-15. doi: 10.1364/AO.52.000509.
LiF crystal and film detectors were used to measure the far-field fluence profile of a self-amplified spontaneous-emission free-electron laser beam and diffraction imaging with high spatial resolution. In these measurements the photoluminescence (PL) response of LiF crystal and film was compared over a wide range of soft x-ray fluences. It was found that the soft x-ray fluence dependences of LiF crystal and film differ. At low fluence, the LiF crystal shows higher PL response compared to LiF film, while this comparison is the opposite at higher fluence. Accurate measurement of LiF crystal and film PL response is important for precise characterization of the spatial, spectral, and coherence features of x-ray beams across the full profile and in localized areas. For such measurements, crucial LiF detector attributes are high spatial resolution and high dynamic range.
使用氟化锂（LiF）晶体和薄膜探测器来测量自放大自发辐射自由电子激光束的远场注量分布以及进行具有高空间分辨率的衍射成像。在这些测量中，对LiF晶体和薄膜在宽范围的软X射线注量下的光致发光（PL）响应进行了比较。发现LiF晶体和薄膜的软X射线注量依赖性有所不同。在低注量时，LiF晶体相比LiF薄膜表现出更高的PL响应，而在高注量时这种比较则相反。准确测量LiF晶体和薄膜的PL响应对于精确表征整个轮廓和局部区域内X射线束的空间、光谱和相干特性非常重要。对于此类测量，关键的LiF探测器特性是高空间分辨率和高动态范围。
