Wisconsin Alumni Research Foundation

John P Wallace

Franco Cerrina

Jay Keith Anderson

Cary Brett Forest

Yuri V Petrov

Robert W Harvey

Hugh R Lowry

An apparatus for generating a highly energetic plasma employs a low-energy neutral beam injected into a magnetically contained mirror plasma to produce plasma ions boosted in energy to fusion levels by a coordinated radiofrequency field.

High-energy plasma generator using radio-frequency and neutral beam power

An imaging mount and apparatus that reduces or eliminates stress induced in an imaging mask mounted thereto. The mount comprises a support block and a trio of mounting pads connected thereto. At least two of the mounting pads are connected to the support block so that their respective positions are adjustable within a predetermined plane which is preferably substantially parallel to a surface of a substrate to be imaged. Each of the mounting pads including means for securing the imaging mask generally parallel to the predetermined plane. The positions the adjustable mounting pads adjust within the predetermined plane responsive to securing of the lithography mask thereto so that the imaging mask is essentially undeflected due to the securing thereof. The absence of deformation (and, as a result, stress) in the imaging mask due to its being secured to the mount reduces the degree of distortion of radiation passing through the mask and to the imprinted surface.

Stress-free mount for imaging mask

Disposable lighter with integrated clip

An electromagnetic levitation casting apparatus having an improved levitation coil assembly employing flux concentration devices, is provided. The improved levitation coil assembly comprises a plurality of slotted annular slugs surrounding a tubular casting vessel within which a liquid metal column is to be levitated and solidified by cooling pursuant to the General Electric Levitation Casting (GELEC (.RTM.)) process. Each of the slotted annular slugs is inductively coupled to a respective electromagnetic field producing coil having a large number of turns surrounding the slug. Each slotted annular slug serves to concentrate the magnetic field produced by its associated primary mutli-turn coil to substantially the interior cross sectional area of the tubular casting vessel it surrounds and functions as a current step-up transformer. A separate slotted annular slug and associated surrounding electromagnetic multi-turn field producing coil is provided for each phase winding of the multi-phase excitation employed in the improved levitation coil assembly.

Electromagnetic levitation casting apparatus having improved levitation

Growing community of inventors

Oregon, WI, United States of America

John P Wallace