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Schematic of the principal components of the NSLS beamline X9 from the undulator source (at the right) to the endstation hutch (large black box). Abbreviations used: gate valve (GV); double-crystal monochromator (DCM); Kirkpatrick–Baez (KB); horizontal/vertical focusing mirrors (HFM/VFM); ion chamber beam-position monitor (IC BPM); slits (S1, S2, S3); upstream/downstream monitor (usmon/dsmon).
