Speaker
Description
Direct wind technology is capable of manufacturing complex multi-functional multi-layer coil
structures without the need for creating custom production tooling and fixturing for each new
project. The prestressing and field quality corrections is integrated in the manufacturing steps, and
the final coil does not require curing. The direct wind coil has several unique features. The
conductor layout is characterized by thin single conductors wound over long lengths and separated
from the other turns with thick layer of insulation. Moreover, there are several layers of winding.
The strong non-uniformity in the magnetic field distribution results in different current and thermal
margins for quenching in different regions. The quench protection modeling involves multiphysics coupling between electrical, thermal and magnetic transient. The material properties vary
with time. This coupled with the complexity in the geometry adds to long computation times.
We propose a theoretical framework to simulate the quench propagation in the direct wind
magnets. Thereafter, we study the performance of different quench protection strategies. The
objective of this study is to understand the quench propagation in the EIC high inductance direct
wind magnet and to design appropriate quench protection strategy to protect the magnet. The
theoretical model has been validated with controlled spot heater induced quenches in a real 4T
class direct wind magnet.
