FIR SPECTROSCOPY AND BUNCH SHAPE MEASUREMENT BY COHERENT SYNCHROTRON RADIATION

通过相干同步加速器辐射进行冷杉光谱和束形状测量

基本信息

批准号：
03504001
负责人：
IKEZAWA Mikihiko
金额：
$ 17.98万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (A)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

Using a linear accelerator at Laboratory for Nuclear Science, Tohoku University, We have observed most fundamental properties of coherent synchrotron radiation. We observed the coherence of the wave packet of light from individual bunches by the observation of interference pattern with an interferometer, and confirmed spectral fine structure due to the interference using a high resolution spectrometer. We observed the suppression of the coherent radiation by a shielding effect of parallel plates of metal. properties of coherent transition radiation such as the spectrul intensity, dependence of the intensity on the emission lengths, angular distribution of the intensity have also been investigated and analyzed well by theory.By the coherent transition radiation, the transmission of a solid state specimen of a glass material was observed with high resolution in the long wavelength region to 3 mm and the measurement of transmission was confirmed to be possible up to 5 mm. Using a 100 ns pulse of transition radiation and the electron beam from the accelerator, a high speed measurement of radiolysis was done in the wavelength range from 0.2 to a few mm.It has been confirmed that analysis of coherent synchrotron radiation and coherent transition radiation as well gives the distribution function of the electron in a bunch, which is of almost the Gaussian shape with the width of 0.26 to 0.27 mm. The analysis of the angular distribution of coherent transition radiation also gives the emittance of the beam. These results indicates that the observation of the coherent radiation is a new method of the beam diagnosis with a high resolution of picosecond.

我们使用Tohoku University的核科学实验室的线性加速器，我们观察到了相干同步辐射的最基本特性。我们通过使用干涉仪观察干涉模式，观察到了单个束的光包的连贯性，并由于使用高分辨率光谱仪的干扰而确认了光谱细胞结构。我们观察到通过平行板的屏蔽作用抑制相干辐射。相干过渡辐射的特性，例如光谱强度，强度对发射长度的依赖性，强度的角度分布也通过理论进行了很好的研究和分析。通过相干的过渡辐射，在长波长区域的高分辨率上观察到了玻璃材料的固态传播，并确认了3 mm的较高分辨率，并可以测量3 mm的距离。使用100 ns的过渡辐射脉冲和加速器的电子束，在波长中进行了高速测量，从0.2到几毫米。已经证实，对相干同步辐射和相干过渡辐射的分析也几乎使电子的分布在g的分布中，并使速度为0.26的分布。相干过渡辐射的角度分布的分析也给出了光束的发射。这些结果表明，相干辐射的观察是梁诊断的一种新方法，具有高分辨率的分辨率。