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

@article{citeulike:3347675, 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.}, archivePrefix = {arXiv}, author = {Fairbairn, Malcolm and Mcelrath, Bob}, citeulike-article-id = {3347675}, citeulike-linkout-0 = {http://arxiv.org/abs/0809.4004}, citeulike-linkout-1 = {http://arxiv.org/pdf/0809.4004}, day = {23}, eprint = {0809.4004}, month = {Sep}, posted-at = {2008-09-28 19:45:14}, priority = {2}, title = {There is no explosion risk associated with superfluid Helium in the LHC cooling system}, url = {http://arxiv.org/abs/0809.4004}, year = {2008} }

TY - JOUR ID - citeulike:3347675 L3 - citeulike-article-id:3347675 N2 - 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. TI - There is no explosion risk associated with superfluid Helium in the LHC cooling system AU - Fairbairn, Malcolm AU - Mcelrath, Bob PY - 2008/Sep/23/ UR - http://arxiv.org/abs/0809.4004 ER -