US 11,946,598 B2
Cryogenically cooled vacuum chamber radiation shields for ultra-low temperature experiments and extreme high vacuum (XHV) conditions
Daniel Dessau, Boulder, CO (US); and Justin Griffith, Morrison, CO (US)
Assigned to The Regents of of the University of Colorado, a body corporate, Denver, CO (US)
Appl. No. 17/274,881
Filed by The Regents of the University of Colorado, a body corporate, Denver, CO (US)
PCT Filed Sep. 12, 2019, PCT No. PCT/US2019/050871
§ 371(c)(1), (2) Date Mar. 10, 2021,
PCT Pub. No. WO2020/056177, PCT Pub. Date Mar. 19, 2020.
Claims priority of provisional application 62/838,999, filed on Apr. 26, 2019.
Claims priority of provisional application 62/730,233, filed on Sep. 12, 2018.
Prior Publication US 2022/0057046 A1, Feb. 24, 2022
Int. Cl. F25B 9/14 (2006.01); F17C 3/08 (2006.01); F25B 9/10 (2006.01); F25D 19/00 (2006.01)
CPC F17C 3/085 (2013.01) [F25B 9/10 (2013.01); F25B 9/14 (2013.01); F25D 19/00 (2013.01); F17C 2203/0316 (2013.01); F17C 2203/0629 (2013.01); F17C 2223/0161 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ultra-high vacuum (UHV) or extreme-high vacuum (XHV) system comprising:
a vacuum chamber;
a target within the vacuum chamber;
two or more overlapping radiation shields arranged within an inner vacuum space of a vacuum chamber, wherein the two or more overlapping radiation shields surround at least a portion of the target;
a first cooling element unit thermally coupled to a first radiation shield of the two or more overlapping radiation shields, wherein the first cooling element unit is configured to reduce the first radiation shield's temperature to at least <100K;
a second cooling element unit thermally coupled to a second radiation shield of the two or more overlapping radiation shields, wherein the second cooling element unit is configured to reduce the second radiation shield's temperature to at least <25K; and
a third cooling element unit thermally coupled to the target, the third cooling element unit thermally isolated from both the first radiation shield and the second radiation shield, wherein the third cooling element unit is configured to reduce the target's temperature to at least <4K.