Synopsis

Keywords: Physics & Engineering: Hardware, Physics & Engineering: High-Field MRI, Physics & Engineering: Physics

Outline of a presentation describing the differences in magnet design for a conventional cryogen-filled magnet and that of a cryogen-free magnet.

Abstract

This talk will describe the components of a standard cryogen-filled magnet, the role of cryogenics, and the cooling of a magnet. With the increasing scarcity of liquid helium, there has been a move towards cyrogen-free magnets, reducing the volume of liquid helium needed by almost a factor of 1000. Cryogen-free magnets pose unique design challenges that are addressed in a number of ways which may change operating considerations. The differences in magnet design between a cryogen-filled and cryogen-free magnets will be reviewed. In addition, the next steps in advanced magnet design, especially pushing the field strength to 3T and 7T in a smaller footprint will be discussed.

Learning Objectives

In this session, the attendee will be able to:
- understand the differences between conventional cryogen-filled and cryogen-free magnets, and the criticality of the magnet heat load.

- understand the operational considerations, especially the impact of magnet-gradient interactions on the magnet design.
- understand the need for back-up power in cryogen-free systems.

Acknowledgements

Grant support from NIH R01EB010065, U01EB024450, U01EB026976, CDMRP W81XWH-16-2-0054

References

No reference found.