This document discusses Silicon Drift Detectors (SDD) for use in synchrotron energy dispersive X-ray fluorescence (EDXRF) spectroscopy. It begins with an introduction to SDDs, explaining their structure and operating principle. It then describes the features and high performance of SDDs, including their high count rate, good energy resolution, and large active area. The document presents spectra from an Fe55 source taken with an SDD and includes diagrams of detector modules, cooling systems, and integration with spectroscopy systems. It concludes by emphasizing the key advantages of SDDs for spectroscopy applications like their lower noise and ability to operate at higher count rates than conventional semiconductor detectors.