| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation and Transitions at Grain Boundaries VII
|
| Presentation Title |
Critical Assessment of Grain Boundary Role on the Magnetic Flux Trapping in Niobium |
| Author(s) |
P Garg, Thomas R. Bieler, Kiran Solanki |
| On-Site Speaker (Planned) |
Kiran Solanki |
| Abstract Scope |
The functional and mechanical properties of crystalline material like niobium are controlled by the nature of grain boundaries (GBs), since significant degradation in Nb performance at high accelerating fields has been attributed to material defects. Several theories had been proposed to explain the GB flux trapping, but the mechanism(s) underlying the flux pinning has not been unequivocally established. Therefore, it is crucial to understand the relationship between the GB and associated properties to develop interface-dominant materials. Thus, using first-principles calculations, the effects of macroscopic degrees of freedom and local electronic structure associated with different GBs is examined to quantify magnetic flux trapping at niobium interfaces. The interactions between the residual strain field around microstructural defects and external magnetic field are also studied. Once understood, this information will help identify new processing methods to obtain an optimized microstructure for Nb cavities. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |