Title :
Accelerator magnet plugging by metal oxides: a theoretical investigation, remediation and preliminary results
Author_Institution :
TJNAF, Newport News, VA, USA
Abstract :
The Thomas Jefferson National Accelerator Facility has experienced magnet overheating at high power. Overheating is caused by cooling water passages becoming plugged and is a direct result of the Dean Effect deposition of corrosion products suspended in the water. Solving simplified dynamic model equations of the flow in the magnet tubing bends yielded a relationship for plugging rate as a function of particle size, concentration, velocity, channel width and bend radius. Calculated deposition rates using data from a previous study are promising. Remediation has consisted of submicron filtration, magnet cleaning, and dissolved oxygen removal. Preliminary results are good: no accelerator outages have been attributed to magnet plugging since the remediation has been completed.
Keywords :
accelerator magnets; beam handling equipment; electron accelerators; linear accelerators; superconducting magnets; Dean Effect; accelerator magnet plugging; cooling water passages; deposition rates; dissolved oxygen removal; magnet cleaning; magnet overheating; metal oxides; submicron filtration; Accelerator magnets; Cooling; Corrosion; Electron accelerators; Equations; Filtration; Heat transfer; Linear accelerators; Superconducting magnets; Water heating;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1288996