The ALS Fourier-Transform Soft X-ray Spectrometer (FTSX)
E.J.Moler,
S.Burke, M.R.Howells, Z.Hussain, S.Locklin, J.Spring
Beamline
9.3.2
Technical Specifications
| Mirror Stage | custom flexure stage
roll and yaw runout travel distance position resolution |
high yield strength maraging steel
< 1 µrad 17 mm 3 Å @ 200 kHz |
| Mirrors | 4 mirrors permanently mounted on an alignment prism
interferometrically flat for soft x-rays alignment |
zerodur for thermal stability
slope error <0.5 µrad finish < 2 Å rms <0.6 µrad |
| Beam Splitter | preferentially etched, single-crystal silicon mirrors
wavefront dividing optical coating |
50 µm slots; 100 µm period
low-stress Mo film |
| Beam Splitter Mounts | computer controlled picomotors and high-precision LVDT encoders
alignment stability (preliminary) |
fine alignment control <0.2 µrad
<< 1 mrad/week |
* All specifications have been achieved for each component.
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