X-ray microscope system with cryogenic handling system and method
A cartridge-based cryogenic imaging system includes a sample handling system. This system uses a kinematic base and cold interface system that provides vertical loading to horizontally mounted high-precision rotation stages that are able to facilitate automated high-resolution three-dimensional (3D) imaging with computed tomography (CT). Flexible metal braids are used to provide cooling and also allow a large range of rotation. A robotic sample transfer and loading system provides further automation by allowing a number of samples to be loaded and automatically sequentially placed on the sample stage and imaged. These characteristics provide the capability of high-throughput and highly automated cryogenic x-ray microscopy and computed tomography.
1. A cryogenic imaging system, comprising:
a kinematic base that receives cartridges on a cryogenic base, with each cartridge carrying a specimen and further includes a positioning stage and a warm-cold interface between the positioning stage and the cryogenic base;
a flexible thermal linkage between the cryogenic base and a refrigeration source to provide conductive cooling;
a robotic loading and transfer system that is able to accept one or more cartridges and load the cartridges onto the cryogenic base;
a source for generating an x-ray beam that irradiates the cartridges on the cryogenic base; and
a detector for detecting the x-ray beam from the cartridges.
2. A system as claimed in claim 1 , wherein the positioning stage positions the cryogenic base along three axes.
3. A system as claimed in claim 1 , wherein the positioning stage rotates the cryogenic base.
4. A system as claimed in claim 1 , wherein the warm-cold interface comprises a ball and groove configuration.
5. A system as claimed in claim 1 , wherein the warm-cold interface comprises a ball and cone configuration.
6. A system as claimed in claim 1 , wherein the flexible thermal linkage comprises one or more metal wires.
7. A system as claimed in claim 1 , further comprising cryogenic shield surrounding the cryogenic base, the cryogenic shield being cooled by the refrigeration source.
8. A system as claimed in claim 7 , wherein the flexible thermal linkage extends between the cryogenic base and the cryogenic shield.
9. A system as claimed in claim 7 , wherein the cryogenic shield comprises beam ports through which the x-ray beam passes.
10. A system as claimed in claim 7 , wherein the cryogenic shield comprises loading ports through which the robotic loading and transfer system transfers the cartridges.
11. A system as claimed in claim 1 , wherein the robotic loading and transfer system comprises a shuttle holding multiple cartridges and a gripper for transferring cartridges between the shuttle and the cryogenic base.