Which measure can help prevent water from entering a quench pipe in zone 3?

Quench pipes are designed to safely divert helium gas from the magnet coil in the event of a quench, preventing damage to the magnetic resonance imaging (MRI) system and ensuring safety. One critical aspect of quench pipe design is to prevent the ingress of water, which could lead to potential hazards.

Angling the quench pipe downward is significant because it allows gravity to aid in preventing water accumulation inside the pipe. An angle of 180 degrees downward ensures that any rain or water will run off and not enter the pipe at all, providing a robust measure against water ingress.

A vented cap on top of the quench pipe also plays a crucial role. This feature allows any escaping helium gas during a quench to vent safely while minimizing the chance of water entering the quench pipe. The vented design effectively prevents a vacuum seal that could draw water into the system.

Having the quench pipe angled down at a 45-degree angle serves a similar purpose, ensuring that the pipe is not positioned level or upward, which could allow water to pool.

Given these points, all measures—angling the pipe downwards (both 180 and 45 degrees) and using a vented cap—collectively contribute to a comprehensive strategy to minimize the