![P468 - Monochromator - Bestec GmbH_02 P468 - Plane grating monochromator (PGM) for soft X-ray synchrotron radiation at IPE beamline at Sirius Synchrotron Light Source, LNLS Brazil](https://bestec-optics.de/wp-content/uploads/2019/06/P468-Monochromator-Bestec-GmbH_02-683x1024.png)
P468 – PGM IPE LNLS
Application
Plane grating monochromator (PGM) for soft X-ray synchrotron radiation
Year of delivery
2019
Installation site
IPE beamline at Sirius Synchrotron Light Source, LNLS Brazil
Design Features
- High-resolution grazing incidence variable line spacing plane grating monochromator (PGM).
- Spectral range: 90 – 2000 eV.
- Optical elements: one plane mirror and four plane grating.
- Temperature sensors at internal mechanics, mirror and gratings holders.
-
Active water cooling of all optical elements.
- Water cooled zero-order stop.
- Permanently installed bakeout provisions.
- Adjustable support structure.
Performance Features
- High positioning resolution (minimum incremental motion).
- High pitch rotation stability and repeatability.
- Minimized mounting induced deformations.
Outer Dimensions
Technical specifications and performance values
General
Vacuum chamber
Chamber type
cylindrical, vertical axis
Main flange
at the top
Material
1.4404 (C < 0.02%)
Base pressure
10-10 mbar range
Optical design parameters
Beam height (entrance)
1390 mm
Beam offset
18 mm
Number of plane mirrors
1
Plane mirror dimensions
530 mm x 40 mm x 50 mm
Number of gratings
4
Gratings dimensions
160 mm x 50 mm x 50 mm
Support structure
Adjustment ranges
Vertical translation
5 mm
Lateral translation
± 10 mm
Longitudinal translation
± 10 mm
Pitch
± 1°
Roll
± 1°
Yaw
± 1°
Plane mirror
Pitch rotation
Range
-0.5° to +11°
Resolution (design value)
0.004 µrad /motor fine step
(1/64, recommended)
0.0097087 µrad /encoder count
Repeatability
0.14 µrad (pitch)
0.15 µrad (roll)
Long-term stability (2.5 h)
0.015 µrad
Translation
Range
-10 mm to +27 mm
Resolution (design value)
0.02 µm /motor fine step
(1/128, recommended)
0.05 µm /encoder count
Repeatability
0.16 µrad (pitch)
0.15 µrad (roll)
Gratings
Pitch rotation
Range
-0.9° to +9.4°
Resolution (design value)
0.004 µrad /motor fine step
(1/64, recommended)
0.0097087 µrad /encoder count
Resolution (measured value)
0.05 µrad
Repeatability
0.12 µrad (pitch)
0.07 µrad (roll)
Long-term stability
(ca. 30 minutes)
0.011 µrad
Translation (grating exchange)
Range
190 mm
Resolution (design value)
0.02 µm /motor fine step
(1/128, recommended)
0.05 µm /encoder count
Repeatability
0.17 µrad (pitch)
0.15 µrad (roll)