Electric lamp and discharge devices – With positive or negative ion acceleration – Extraction or target electrode
Patent
1991-06-07
1993-08-10
Yusko, Donald J.
Electric lamp and discharge devices
With positive or negative ion acceleration
Extraction or target electrode
313420, 313230, 31511181, H05H 100, H01J 2700, H01J 3300
Patent
active
052352390
ABSTRACT:
Window constructions for use in particle accelerators to separate an evacuated accelerator beam chamber from a gas or liquid filled target area, which window structure enhances cooling of the foil covering the window opening and reduces stresses on the foil. For preferred embodiments, the window opening is shaped and dimensioned to provide high length-to-width aspect ratio and a rectangular shape with rounded corners. The openings should generally be as narrow as possible while still being wide enough to assure efficient transmission of the ion beam. Stresses in the foil is reduced by providing controlled bowing of the portions of the foil covering the window. This may be accomplished by providing some slack in the foil, at least in one dimension, but is preferably accomplished by pressing the foil between mating curved surfaces selectively extending from the edges of the window openings, resulting in the desired bow in the foil in the window area. With a rectangular opening, the bow is preferably a generally cylindrical bow about an axis parallel to the length dimension of the window. A generally spherical bow may also be utilized. A plurality of adjacent generally rectangular openings separated by struts are also utilized for some embodiments.
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Flusberg Allen M.
Hughey Barbara J.
Jacob Jonah H.
Klinkowstein Robert
Shefer Ruth
Science Research Laboratory, Inc.
Yusko Donald J.
Zimmerman Brian
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