Question:

“In a recent incident at our facility, following the installation of a new MRI machine, we observed that all iOS devices ceased functioning while other electronics remained unaffected. Subsequent investigations revealed helium leakage from the MRI’s cooling process as the likely cause. Could you provide an expert explanation on why exclusively Apple devices were disabled by the helium exposure, and what specific components within these devices may have been affected?”

Answer:

In the wake of an unusual incident at a medical facility, where the installation of a new MRI machine coincided with the sudden malfunction of all iOS devices on the premises, a curious question arises: Why were Apple devices exclusively affected by helium exposure, and what internal components were compromised?

To unravel this mystery, we must delve into the intricacies of iOS device construction and the unique properties of helium. Apple devices, particularly those released after the iPhone 6 and Apple Watch Series 0, are equipped with microelectromechanical system (MEMS) oscillators. These tiny components are responsible for regulating the device’s timekeeping and ensuring the proper function of the processor.

Helium atoms, being among the smallest of elements, have the ability to penetrate the seals of these oscillators. Once inside, helium atoms disrupt the oscillator’s function, leading to a cascade of system failures as the device’s processor loses its timekeeping reference. This results in the device freezing or failing to respond to user inputs.

The specificity of this vulnerability to Apple devices can be attributed to their particular use of MEMS technology. Other electronics, including Android phones and various healthcare equipment, were likely unaffected due to different internal architectures that do not rely on the same type of oscillators, or due to more robust sealing methods that prevent helium ingress.

In the reported incident, the helium leakage occurred during the magnet ramping process of the MRI installation, which involves the boiling off of liquid helium used in cooling the superconducting magnet. It is hypothesized that the helium gas escaped through the venting system and dispersed throughout the facility via the HVAC system, reaching concentrations sufficient to infiltrate and disable the iOS devices.

The recovery process for these devices, as outlined by Apple, involves allowing the helium to dissipate naturally over the course of approximately one week. During this time, the device should remain uncharged and powered off to ensure complete helium evacuation and battery discharge. Afterward, the device can be recharged and powered on, typically restoring full functionality.

This incident serves as a fascinating case study in the intersection of advanced technology and unexpected chemical interactions. It underscores the importance of understanding the environmental sensitivities of modern electronics and the need for stringent controls in environments where such interactions can occur. For Apple and other tech companies, it may also prompt a reevaluation of design choices to mitigate similar risks in the future.