The Importance of Nanotechnology and Nanometrology for Space ...
The Importance of Nanotechnology and Nanometrology for Space ...
The Importance of Nanotechnology and Nanometrology for Space ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
MLS-2001-11-20.01<br />
X-ray wavelength λ ~ 1 nanometer.<br />
Why is nano-accuracy important?<br />
Diffraction from d = 2 mm-spaced x-ray mirrors is<br />
∆θ = λ/d = 0.5 microradian = 0.1 arcsecond.<br />
Diffraction-limited per<strong>for</strong>mance (λ/10) <strong>for</strong> 200 mm long mirror with 2 mm spacing<br />
occurs when mirror placement error is<br />
∆X = L ∆θ/10 = 10 nanometer.<br />
Nanometer accuracy achieves sub-arcsecond diffraction-limited per<strong>for</strong>mance.<br />
X ray Mirror<br />
L = 200 mm<br />
d = 2 mm<br />
X ray<br />
λ ~ 1 nm
Change language