Where should the ferromagnetic envelope be bonded when skin effect exists?

The appropriate bonding location for a ferromagnetic envelope in the context of skin effect is at both ends. This is because skin effect refers to the tendency of alternating current (AC) to be distributed within conductors such that the current density is greater near the surface than in the center of the conductor. As a result, if the ferromagnetic envelope is only bonded at one end, it can lead to uneven distribution of electrical fields and potential hotspots, which may not adequately contain the electromagnetic fields generated.

Bonding the ferromagnetic envelope at both ends helps to maintain a uniform magnetic field throughout the system and ensures that the envelope effectively contains and stabilizes the magnetic flux, especially in high-frequency applications where skin effect is more pronounced. This also reduces the risk of resonance or interference that could adversely impact nearby equipment or systems. Proper bonding at both ends is therefore critical in managing these effects effectively.