Context

TLDR

Photons of higher energies are generated by the undulators and needs to be blocked before they reach the interaction point (IP).

Details

More information about the HRM can be found here.

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The generation of x-ray by electrons passing through undulators produces, in addition of the fundamental energy, radiation at integer multiple of the fundamental energy, called harmonics. Because of symmetry, only the odd orders are allowed, so for example, for a fundamental at 5keV, photons at 15keV, 25keV, etc. are also generated.

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Gliffy Diagram
macroId 9f261fa5-e152-412c-a418-502192b07582 displayName HRM name HRM pagePin 3

Screens

You can access motors relating to the HRM by clicking on the beamline related display (shown below).

Image Added

More information about the HRM can be found here.