AIR-COOLED MAGNETIC CORES.

摘要

Commercial and medical use of discharge-pumped lasers such as excimer lasers, metal vapor lasers, and pulsed CO2 lasers has resulted in the demand for increased repetition rates to provide increased total power output. Increased repetition rates, however, also result in greater losses in magnetic cores used to drive these lasers. The use of air cooling with known magnetic core configurations is inadequate to cool the magnetic cores. As a result, the excessive temperature rise of the magnetic core material results in undesirable changes in the magnetic properties such as reduced saturation induction. In addition, the excessive temperature rise may compromise the insulation materials either on the wire windings or interlaminar insulation within the magnetic core itself.The present invention provides a magnetic core which has improved cooling within the current cross-sectional area and length of cores used in lasers and which requires no cooling fluid. The present magnetic core comprises at least two concentric corelets wherein the corelets are formed of magnetic amorphous metal alloy and are substantially separated by a gas passage. The present magnetic cores are useful in various pulse power applications including in high power pulse sources for linear induction particle accelerators, as induction modules for coupling energy from the pulse source to the beam of these accelerators, as magnetic switches in power generators for inertial confinement fusion research, and in magnetic modulators for driving excimer lasers, metal vapor lasers, and pulsed CO2 assembly line lasers.