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P487 - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
P487 - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany

P487 – DCM-PGM MIFO PTB

Application

Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation

Year of delivery

2022

Installation site

MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany

Design Features

Performance Features

  • High positioning resolution (minimum incremental motion).
  • High pitch rotation stability and repeatability.
  • High scanning speed of pitch rotations.
  • Minimized mounting induced deformations.

Outer Dimensions

P487 - Outer dimensions - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation - Bestec GmbH

Technical specifications and performance values

General

Vacuum chamber

Chamber type

cylindrical, vertical axis

Main flanges

at the top

Material

1.4404 (C < 0.02%)

Base pressure

10-10 mbar range

Optical design parameters

Beam height (entrance)

1400 mm

Beam offset

-22 mm

Number of plane mirrors

1

Plane mirror dimensions

420 mm x 50 mm x 50 mm

Number of gratings

1

Gratings dimensions

130 mm x 40 mm x 40 mm

Crystal 1 dimensions

85 mm x 20 mm x 15 mm

Crystal 2 dimensions

32 mm x 20 mm x 10 mm

Support structure

Adjustment ranges

Vertical translation

± 5 mm

Lateral translation

± 5 mm

Longitudinal translation

± 5 mm

Pitch

± 1°

Roll

± 1°

Yaw

± 1°

Plane mirror

Pitch rotation

Range

-0.92° to +52°

Resolution (design value)

0.0218 µrad /motor fine step
(1/256, recommended)
0.00146 µrad /encoder count

Resolution (measured value)

0.05 µrad

Repeatability

0.47 µrad (pitch)
0.38 µrad (roll)

Long-term stability (> 2h)

0.04 µrad

Scanning speed

> 1° /s

Lateral translation

Range

+1.22 mm to -139.66 mm

Resolution (design value)

0.0065 µm /motor fine step
(1/128, recommended)
0.05 µm /encoder count

Repeatability

0.24 µrad (pitch)
0.23 µrad (roll)
< 100 µm (translation)

Long-term stability (> 2h)

0.02 µrad

Scanning speed

1 mm /s

Grating / crystals

Pitch rotation

Range

-1.03° to +56°

Resolution (design value)

0.0218 µrad /motor fine step
(1/256, recommended)
0.00146 µrad /encoder count

Resolution (measured value)

0.05 µrad

Repeatability

0.09 µrad (pitch)
0.11 µrad (roll)

Long-term stability (> 2h)

0.06 µrad

Scanning speed

> 1° /s

Lateral translation

Range

1.68 mm to -139.48 mm

Resolution (design value)

0.0065 µrad /motor fine step
(1/128, recommended)
0.05 µm /count

Repeatability

0.28 µrad (pitch)
0.15 µrad (roll)
< 100 µm (translation)

Long-term stability (> 2h)

0.03 µrad

Scanning speed

1 mm /s

Crystals

Distance between crystals

Range

10 mm

Resolution (design value)

3.64 µm /step (full step)
0.001 µm /encoder count

Upper crystal rotation

Range

-0.1° to +0.1°

Piezo travel range

105 µm

Resolution

~28.3 µrad /V (pitch)
~21.5 µrad /V (roll)
0.001 µm /encoder count

Performance Test Results

Pitch deviation after pitch change (mirror)
P487 - Pitch deviation after pitch variation (mirror) - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Roll deviation after pitch change (mirror)
P487 - Roll deviation after pitch variation (mirror) - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Pitch deviation after pitch change (grating)
P487 - Pitch deviation after pitch variation (grating) - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Roll deviation after pitch change (grating)
P487 - Roll deviation after pitch variation (grating) - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Pitch deviation after mirror translation
P487 - Pitch deviation after mirror translation - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Roll deviation after mirror translation
P487 - Roll deviation after mirror translation - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Pitch deviation after grating translation
P487 - Pitch deviation after grating translation - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Pitch deviation after grating translation
P487 - Roll deviation after grating translation - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Mirror pitch positioning resolution
P487 - Mirror pitch positioning - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Mirror pitch positioning resolution
P487 - Mirror pitch positioning - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Mirror pitch long-term stability
P487 - Mirror pitch stability - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Mirror lateral position long-term stability
P487 - Mirror position stability - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Grating pitch positioning resolution
P487 - Grating pitch positioning - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Grating pitch positioning resolution
P487 - Grating pitch positioning - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Grating pitch long-term stability
P487 - Grating pitch stability - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Grating lateral position long-term stability
P487 - Grating position stability - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Scanning speed of mirror pitch
P487 - Scanning speed of grating pitch - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Scanning speed of grating pitch
P487 - Scanning speed of mirror pitch - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Scanning speed of mirror translation
P487 - Scanning speed of mirror translation - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Scanning speed of grating translation
P487 - Scanning speed of grating translation - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany
Residual gas analysis
P487 - Residual gas analysis - Combined double crystal monochromator (DCM) and multilayer plane grating monochromator (MLM) to bridge the gap between soft and hard X-ray synchrotron radiation at MIFO beamline of National Metrology Institute of Germany (PTB) at BESSY HZB, Germany

Pictures