Crystal Offset


The crystal offset allows the experimenter to easily change the orientation of the sample while keeping it at cryogenic temperatures.  The SSRL cryo-pin is first removed from the cryo-stream with precooled cryo-tongs and stored in liquid nitrogen.  The Hampton magnet is replaced by the crystal offset and then the sample pin is replaced.  Using the crystal offset,  the crystal is 20 degrees from the original orientation and remains centered in the cryo-stream. The offset works best if the crystal/loop is mounted approximately 21 mm from the bottom of the ssrl style pin or 20 mm from the magnet face.


Schematic of the Crystal Offset