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公开(公告)号：US20250003845A1
公开(公告)日：2025-01-02
申请号：US18886921
申请日：2024-09-16
Applicant: FEI Company
Inventor： Ronald Lamers , Hans Persoon , Alphons Theophile Augusta Maria de Waele , Theo Ruijl , Hugo van Leeuwen
Abstract: Apparatus and methods are disclosed for vibration-free cryogenic cooling, suitable for TEM and other analytic equipment. A thermal battery includes one or more of: a cryocooler, a thermal switch, a thermal cold storage reservoir, and a cold finger. The thermal reservoir is mounted outside a sample chamber. The cold finger provides thermal coupling between the reservoir and a sample holder inside the sample chamber. In varying embodiments, sample holder and sample temperatures are regulated by a heater or by an inline variable thermal resistor. Cyclic phased operation includes cooling the reservoir, decoupling the cryocooler from the reservoir, and temperature-regulated passive vibration-free thermal energy extraction from sample to reservoir. The described system delivers a stand time of 12 hours at 20 K. Temperature regulation, a hybrid thermal switch, damping of thermal fluctuations, and material selection are described.
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公开(公告)号：US20220404247A1
公开(公告)日：2022-12-22
申请号：US17353604
申请日：2021-06-21
Applicant: FEI Company
Inventor： Ronald Lamers , Hans Persoon , Alphons Theophile Augusta Maria de Waele , Theo Ruijl , Hugo van Leeuwen
Abstract: Apparatus and methods are disclosed for vibration-free cryogenic cooling, suitable for TEM and other analytic equipment. A thermal battery includes one or more of: a cryocooler, a thermal switch, a thermal cold storage reservoir, and a cold finger. The thermal reservoir is mounted outside a sample chamber. The cold finger provides thermal coupling between the reservoir and a sample holder inside the sample chamber. In varying embodiments, sample holder and sample temperatures are regulated by a heater or by an inline variable thermal resistor. Cyclic phased operation includes cooling the reservoir, decoupling the cryocooler from the reservoir, and temperature-regulated passive vibration-free thermal energy extraction from sample to reservoir. The described system delivers a stand time of 12 hours at 20 K. Temperature regulation, a hybrid thermal switch, damping of thermal fluctuations, and material selection are described.
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公开(公告)号：US12123816B2
公开(公告)日：2024-10-22
申请号：US17353604
申请日：2021-06-21
Applicant: FEI Company
Inventor： Ronald Lamers , Hans Persoon , Alphons Theophile Augusta Maria de Waele , Theo Ruijl , Hugo van Leeuwen
CPC classification number: G01N1/42 , F25D19/006 , G01N1/44 , H01J37/261 , H01J2237/2001
Abstract: Apparatus and methods are disclosed for vibration-free cryogenic cooling, suitable for TEM and other analytic equipment. A thermal battery includes one or more of: a cryocooler, a thermal switch, a thermal cold storage reservoir, and a cold finger. The thermal reservoir is mounted outside a sample chamber. The cold finger provides thermal coupling between the reservoir and a sample holder inside the sample chamber. In varying embodiments, sample holder and sample temperatures are regulated by a heater or by an inline variable thermal resistor. Cyclic phased operation includes cooling the reservoir, decoupling the cryocooler from the reservoir, and temperature-regulated passive vibration-free thermal energy extraction from sample to reservoir. The described system delivers a stand time of 12 hours at 20 K. Temperature regulation, a hybrid thermal switch, damping of thermal fluctuations, and material selection are described.
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