Progress report on using magneto-strictive sputtered thin films to modify the shape of a X-ray telescope mirror

Melville P. Ulmer*, Xiaoli Wang, Jian Cao, Julia Savoie, Bridget Bellavia, Michael E. Graham, Semyon Vaynman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations


There is a basic need both in X-ray astronomy and in synchrotron X-ray and neutron beam optics to be able to modify the shape of an optic via an external source of actuation. We describe a technique of shape modification that can be applied to thin walled (∼ 100-400 micron thickness) electroformed replicated optics or glass optics to improve the near net shape of the mirror as well as the mid-frequency (∼ 2-10 mm length scales) ripple. The process involves sputter deposition of a magnetic smart material (MSM) film onto a magnetically hard material (i.e., one that retains a magnetic field, e.g. the material in hard disk drives). The MSM material exhibits strains about 400 times stronger than ordinary ferromagnetic materials. The deformation process involves a magnetic write head which traverses the surface, and under the guidance of active metrology feedback, locally magnetizes the surface to impart strain where needed. We describe the results of our current progress toward our ultimate goal of improving the angular resolution of grazing incidence optics.

Original languageEnglish (US)
Title of host publicationAdaptive X-Ray Optics II
StatePublished - 2012
EventAdaptive X-Ray Optics II - San Diego, CA, United States
Duration: Aug 14 2012Aug 14 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherAdaptive X-Ray Optics II
Country/TerritoryUnited States
CitySan Diego, CA


  • Grazing incidence optics
  • Magnetic smart materials
  • X-ray optics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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