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本文评论红外辐射源的特性,确立同步加速器在激光和热辐射源中的位置。同步加速器辐射是小样品分光学的理想辐射源,约有27个射束系统已在全世界得到广泛的应用。这是一种宽带辐射源,比标准的热辐射源亮1000倍。它是纳秒范围的偏振脉冲辐射,在空间上严重相干。它也是绝对辐射源,这使它能够执行精确的吸收和反射测量。高亮度使得同步加速器辐射成为有限通量样品分光学的理想光源,其主要优点是能够实现非常高的信噪比值。这种优点不仅体现在小样品上,而且还体现在远红外范围内。在远红外范围内,3000K背景是主要的噪声源。然而,同步加速器辐射并不适合大功率应用和非线性应用。现代自由电子激光器在其操作波长处比同步加速器辐射亮8个数量级。
This article reviews the characteristics of infrared radiation sources and establishes the location of the synchrotron in lasers and thermal radiation sources. Synchrotron radiation is an ideal source for small sample fractional optics and about 27 beam systems have been widely used throughout the world. This is a broadband radiation source, 1,000 times brighter than a standard heat radiation source. It is polarized pulse radiation in the nanosecond range that is spatially coherent. It is also an absolute source of radiation, which enables it to perform accurate absorption and reflection measurements. High brightness makes synchrotron radiation an ideal light source for finite-flux sample spectroscopy, with the main advantage of being able to achieve very high signal-to-noise ratios. This advantage not only reflected in the small sample, but also reflected in the far-infrared range. In the far-infrared range, the 3000K background is the main source of noise. However, synchrotron radiation is not suitable for high-power and non-linear applications. Modern free-electron lasers emit 8 orders of magnitude more bright than synchrotron radiation at their operating wavelength.