Calculation of lining parameters for Cryostat designing

The word cryostat is made up of a word whose meaning is cold and stable. Mainly it is a container having a device kept at very low temperature and provides thermal insulation to that device. Sir Dewar was the first who has invented it with double-walled design [1]. Cryogenic liquids are filled inside the cryostat [2]. There should be no heat transfer into the cold vessel of the cryostat. In this paper, we discuss mainly a process to reduce thermal radiation into the cryostat [2] as well as the minimum required materials to achieve minimum heat load. The main function of the cryostat is to provide thermal insulation, mechanical housing of the cryogenic devices and cooling of the device for its safe and reliable operation [1]. Nowadays, large numbers of experiments are planned for various physics goals to operate at liquid N2/He/Xe temperature. Therefore, it is necessary to study the minimum amount and layering of low activity material to get minimum amount of heat load. We are designing the cryostat considering the basic requirements of the LEGEND Collaboration – The Large Enriched Germanium Experiment for Neutrinoless Double-Beta Decay.