There is no explosion risk associated with superfluid Helium in the LHC cooling system

TL;DR

This paper demonstrates that superfluid Helium in the LHC cooling system cannot undergo Bose-Nova explosions or related catastrophic events due to its atomic properties, ensuring safety during operation.

Contribution

It provides a detailed physical analysis showing that Bose-Nova phenomena are impossible in liquid Helium, confirming the safety of the LHC cryogenic system.

Findings

Bose-Novae cannot occur in liquid Helium due to atomic structure

Helium's properties prevent Feshbach resonances and attractive interactions

No physical mechanism exists for Helium to undergo catastrophic explosions

Abstract

We evaluate speculation about the possibility of a dangerous release of energy within the liquid Helium of the Large Hadron Collider (LHC) cryogenic system due to the occurrence of a "Bose-Nova". Bose-Novae are radial bursts of rapidly moving atoms which can occur when a Bose-Einstein Condensate (BEC) undergoes a collapse due the interatomic potential being deliberately made attractive using a magnetic field close to the Feshbach resonance. Liquid 4He has a monatomic structure with s-wave electrons, zero nuclear spin, no hyperfine splitting, and as a consequence no Feshbach resonance which would allow one to change its normally repulsive interactions to be attractive. Because of this, a Bose-Nova style collapse of 4He is impossible. Additional speculations concerning cold fusion during these events are easily dismissed using the usual arguments about the Coulomb barrier at low temperatures, and are not needed to explain the Bose-Einstein condensate Bose-Nova phenomenon. We conclude that that there is no physics whatsoever which suggests that Helium could undergo any kind of unforeseen catastrophic explosion.