Device and method for transferring liquid helium into an application cryostat

Abstract

A device (101) for transferring liquid helium (14) into an application cryostat (102), comprising: a storage dewar (1); a transfer line (9) comprising a first transfer line end (9a) in the storage dewar (1) and a second transfer line end (9b) for insertion into an application cryostat (102); a device (31) for generating a pressure difference between the storage dewar (1) and the application cryostat (102); is characterized by: a condensation heat exchanger (17) for condensing helium gas (12) to liquid helium (11), for insertion into the application cryostat (102); a cryocooler (29) for cooling the condensation heat exchanger (17); and a control device (8) with a measuring input (18a) for a pressure sensor (18) for measuring the gas pressure in the application cryostat (102) and a control output. (31a) for the device (31) for generating a pressure difference, wherein the control device (8) is programmed toThe device (31) is controlled to generate a pressure difference such that the volume of liquid helium (14) transferred per unit time through the transfer line (9) is approximately equal to the volume change of the helium that condenses from helium gas (12) to liquid helium (11) per unit time at the condensation heat exchanger (17). The device minimizes helium losses during the transfer of liquid helium in a simple manner.