초록 ▼

A non-evacuated dewar 10 advantageously employs a molecular sieve 30 that serves to adsorb gasses in the dewar when cooled during operation of the detector 24 thereby preventing liquid formation onto the detector. The effects of outgassing and permeation during storage are substantially eliminated b

A non-evacuated dewar 10 advantageously employs a molecular sieve 30 that serves to adsorb gasses in the dewar when cooled during operation of the detector 24 thereby preventing liquid formation onto the detector. The effects of outgassing and permeation during storage are substantially eliminated because the dewar package is in partial pressure equilibrium with its environment since the interior of the dewar is backfilled with the same inert gas as is in the surrounding outside environment. A second molecular sieve 40 may be used to adsorb moisture which may permeate into the housing.

대표청구항 ▼

In a dewar having a non-evacuated housing at substantially ambient temperature and a detector mounted to the tip of a coldfinger for cooling the detector during operation thereof, the improvement comprising: means including a molecular sieve mounted to the coldfinger adjacent the detector for adsorb

In a dewar having a non-evacuated housing at substantially ambient temperature and a detector mounted to the tip of a coldfinger for cooling the detector during operation thereof, the improvement comprising: means including a molecular sieve mounted to the coldfinger adjacent the detector for adsorbing gas in the housing adjacent the detector when the coldfinger is cooled during operation of the detector; wherein the dewar is backfilled with an inert gas at substantially one atmosphere.