American Nuclear Society

Home / Publications / Journals / Fusion Science and Technology / Volume 70 / Number 2

A Flexure-Based Mechanism for Precision Adjustment of National Ignition Facility Target Shrouds in Three Rotational Degrees of Freedom

K.-J. Boehm, C. R. Gibson, J. R. Hollaway, F. Espinosa-Loza

Fusion Science and Technology / Volume 70 / Number 2 / August-September 2016 / Pages 265-273

Technical Paper /

First Online Publication:June 24, 2016
Updated:August 9, 2016

This paper presents the design of a flexure-based mount allowing adjustment in three rotational degrees of freedom (DOFs) through high-precision set-screw actuators. The requirements of the application called for small but controlled angular adjustments for mounting a cantilevered beam. The proposed design is based on an array of parallel beams to provide sufficiently high stiffness in the translational directions while allowing angular adjustment through the actuators. A simplified physical model in combination with standard beam theory was applied to estimate the deflection profile and maximum stresses in the beams. A finite element model was built to calculate the stresses and beam profiles for scenarios in which the flexure is simultaneously actuated in more than one DOF.

Questions or comments about the site? Contact the ANS Webmaster.