Acryostat(fromcryomeaning cold andstatmeaning stable) is a device used to maintain lowcryogenictemperatures of samples or devices mounted within the cryostat. Low temperatures may be maintained within a cryostat by using various refrigeration methods, most commonly using cryogenic fluid bath such asliquid helium. Hence it is usually assembled into a vessel, similar in construction to avacuum flaskorDewar. Cryostats have numerous applications within science, engineering, and medicine.