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Magnetic Characterization of Micro Shutters for James Web Space Telescope (JWST)Summary of Research that was part of the grant: NASA NAG5 - 13405: Magnetic Characterization of Micro Shutters for James Web Space Telescope (JWST) Period: May 1 2003-October 31 2005 The above funding resulted in following major achievements related to microshutter system for JWST. 1. The original rectangular pattern of magnetic material was changed into magnetic striped pattern to prevent unnecessary twisting during the actuation. The Original geometry favored magnetic remanence vector being oriented along the longer side of the shutter and thus resulting torque caused out of plane twist. Stripe pattern minimizes the out of plane motion and thus prolongs the life-time of microshutter device. 2. We built a new magnetic system (magnetic rotisserie) allowing an accelerated life test of microshutters at various temperatures. This system identified that shutter are capable to withstand as many as several millions of actuating cycles. Our system also identified fabrication related features, like bowing with temperature, collisions with the frame due to misalignment, delaminating of the light shields due to uncontrolled voltage release and poorly fabricated light shields.
Document ID
20050236259
Acquisition Source
Headquarters
Document Type
Contractor or Grantee Report
Authors
Wasilewski, P.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kletetschka, Gunther
(Catholic Univ. of America Washington, DC, United States)
Date Acquired
August 23, 2013
Publication Date
October 10, 2005
Subject Category
Instrumentation And Photography
Funding Number(s)
CONTRACT_GRANT: NAG5-13405
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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