Side‐bounce beamlines with fixed‐exit angles have been intended to operate with only one selected energy. However, a tunable monochromator in a new geometry is presented here that will make side‐bounce beamlines energy tunable. It requires the addition of two more rotations. Analytic solutions for the values of these two rotation angles are provided. The validity of the new concept was checked by ray tracing and two‐dimensional searches in the additional angles. Operational details on the new scheme, including the exit offset and steering of the beams, were determined. In addition to tunability, the new monochromator will reduce the loss from the polarization factor at low energies.

中文翻译：

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可调侧反射单色仪

具有固定出射角的侧反射光束线旨在仅以一种选定的能量运行。但是，这里介绍了一种新几何形状的可调谐单色器，它将使侧反射光束线的能量可调。它需要再增加两个旋转。提供了这两个旋转角度值的解析解。通过在其他角度进行射线追踪和二维搜索，检查了新概念的有效性。确定了有关新方案的操作细节，包括出口偏移和光束转向。除可调性外，新的单色仪还将减少低能量下偏振因子的损耗。