ABSTRACT
This chapter describes about the containers for cryogenic liquids, now called dewars by those in the trade. It then explores the basic concepts of a superconducting magnet design. Dewars are available in a wide range of sizes and design styles and in an equivalently large range of prices. There are two basic mechanisms for heat transport into the experimental region that one must consider when designing a dewar: thermal conduction and thermal radiation. There are two principal types of insulation, in addition to the vacuum, which are available for use in the vacuum space of a dewar: so-called superinsulation and powdered insulation. Glass dewars can provide an economical low temperature environment, particularly for experiments above 1 K and for demonstrations. Cooling a liquid nitrogen storage dewar can be a relatively straightforward event. The chapter focuses on a fundamental cryogenic hardware, one about superconducting magnets, and explores magnet accessories and home-built magnets.
