ALBA-CELLS, Carretera, BP 1413, Km. 3.3, E-08290 Cerdanyola, Barcelona, Spain.
J Synchrotron Radiat. 2011 Nov;18(Pt 6):842-50. doi: 10.1107/S0909049511031529. Epub 2011 Sep 22.
A concept is given for describing multicrystal analyser detectors (MADs), as they are in use for synchrotron powder diffraction, on the basis of the Rowland circle construction. The Rowland circle is typically used to describe focusing geometries and can be adapted for the case of MADs working at a single energy as well as in a limited energy range. With this construction it is also possible to quantify and optimize the walk of the beam along non-central crystals which is inevitable in certain detector designs. The results of this geometrical inspection are correlated with a real detector design that is implemented at the ALBA synchrotron facility in Spain. An error budget is given to estimate the influence and amount of tolerance of the manufacturing process.
提出了一种基于罗兰圆构造来描述多晶分析器探测器（MADs）的概念，因为它们在同步辐射粉末衍射中得到了应用。罗兰圆通常用于描述聚焦几何形状，并且可以适应 MADs 在单一能量以及有限能量范围内工作的情况。通过这种构造，还可以量化和优化光束在非中心晶体上的偏离，这在某些探测器设计中是不可避免的。该几何检查的结果与在西班牙 ALBA 同步加速器设施中实现的实际探测器设计相关联。给出了一个误差预算来估计制造过程的影响和容差量。
