Rounded Strap Fastener for Ion Source Faceplate Arcing Reduction

The patent applies curvature by replacing traditional sharp-cornered fasteners with straps featuring rounded portions. The rounded geometry increases the radius of curvature at stress concentration points, which redistributes and reduces electrostatic stress fields. This directly addresses the arcing problem by eliminating sharp edges that create high electric field gradients, while maintaining secure mechanical attachment of the faceplate to the arc chamber.

The patent changes the geometric parameters of the fastening component by introducing rounded portions with specific radii of curvature. This parameter modification transforms the electrostatic stress distribution pattern, reducing peak stress values that would otherwise occur at sharp corners. The controlled compression force applied by the tension system further modifies the contact parameters between the strap and faceplate, optimizing both mechanical securement and electrostatic performance.

The tension system incorporates springs that automatically apply compression force to press the strap against the faceplate. This self-service mechanism eliminates the need for external actuation or complex control systems - the springs naturally maintain the required contact pressure through their elastic recovery, ensuring reliable faceplate securement while keeping the overall system relatively simple.

The fastening function is segmented into distinct components: the strap with rounded portions for stress reduction, the tension system with springs for force application, and the attachment mechanism for securing to the chamber. This segmentation allows each component to be optimized independently and facilitates easier manufacturing, assembly, and maintenance compared to an integrated complex fastening system.