Elleaume P, Fortgang C, Penel C, Tarazona E
J Synchrotron Radiat. 1995 Sep 1;2(Pt 5):209-14. doi: 10.1107/S0909049595008685.
A very simple pinhole camera set-up has been built to diagnose the electron beam emittance of the ESRF. The pinhole is placed in the air next to an Al window. An image is obtained with a CCD camera imaging a fluorescent screen. The emittance is deduced from the size of the image. The relationship between the measured beam size and the electron beam emittance depends upon the lattice functions alpha, beta and eta, the screen resolution, pinhole size and photon beam divergence. The set-up is capable of measuring emittances as low as 5 pm rad and is presently routinely used as both an electron beam imaging device and an emittance diagnostic.
已经搭建了一个非常简单的针孔相机装置来诊断欧洲同步辐射装置（ESRF）的电子束发射度。针孔放置在靠近铝窗的空气中。通过电荷耦合器件（CCD）相机对荧光屏成像来获取图像。发射度由图像尺寸推导得出。测量的束流尺寸与电子束发射度之间的关系取决于晶格函数α、β和η、屏幕分辨率、针孔尺寸以及光子束发散度。该装置能够测量低至5皮米弧度的发射度，目前常规用作电子束成像设备和发射度诊断工具。
