一种用于微聚焦X射线毛细管束的新型束流挡板。
A new beamstop for microfocus X-ray capillary beams.
作者信息
Englich Ulrich, Revesz Peter, Miller William
机构信息
Cornell University, Macromolecular Diffraction at CHESS (MacCHESS), Cornell High Energy Synchrotron Source, Ithaca, NY 14853.
出版信息
Nucl Instrum Methods Phys Res A. 2011 Sep 1;649(1):101-103. doi: 10.1016/j.nima.2010.12.023.
In order to accurately measure the photon flux and to assist in aligning the beam, we have designed a modified beam stop device based on a photo diode integrated with the beam stop. The beam stop contains a small CdWO(4) crystal that completely stops the X-rays and at the same time produces photoluminescence proportional to the X-ray flux. The light is then guided to a photosensitive diode, using a flexible light pipe, to monitor the flux. With this device we achieve the goal of stopping the primary X-ray beam and simultaneously monitoring the X-ray intensity, thus eliminating the need for integrating ion-chambers into the capillary or collimator mount.
为了精确测量光子通量并辅助光束准直，我们设计了一种改进的束流阻挡装置，该装置基于与束流阻挡器集成的光电二极管。束流阻挡器包含一块小的钨酸镉（CdWO₄）晶体，它能完全阻挡X射线，同时产生与X射线通量成正比的光致发光。然后，利用一根柔性光导管将光引导至一个光敏二极管，以监测通量。通过该装置，我们实现了阻挡初级X射线束并同时监测X射线强度的目标，从而无需将电离室集成到毛细管或准直器支架中。
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