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P470 - Near ambient pressure experimental station for RIXS - SCS European XFEL

P470 –  Experimental station SCS European XFEL

Application

Near ambient pressure experimental station for RIXS

Year of delivery

2020

Installation site

SCS instrument of the European XFEL, Germany

This very compact experimental station was designed for near ambient pressure operation at the SCS beamline of the European XFEL. A short differential pumping unit had to account for a pressure factor of 106. Alignment can be controlled remotely, considering access and space constrains at the installation site.

Design Features

  • Provisions for laser in-coupling.
  • Differential pumping unit.

  • Motorized and encoded support structure for remote alignment.

Performance Features

  • High stability for small effective RIXS source size.
  • High positioning repeatability of the complete system after experiment exchange at the beamline.

  • High positioning resolution and repeatability of all motion axes.
  • High pressure gradient at large beam appertures in the differential pumping unit.

Outer Dimensions

P470 - Near ambient pressure experimental station for RIXS - SCS European XFEL

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

1.5 x 10-10 mbar

Vacuum chamber

Chamber lateral translation

Range

-15.40 mm to 15.10 mm

Resolution (design value)

0.025 µm/ motor fine step
(1/16, recommended)
0.05 µm /encoder count

Repeatability

2.6 µm

Chamber longitudinal translation

Range

-15.40 mm to 15.10 mm

Resolution (design value)

0.025 µm /motor fine step
(1/16, recommended)
0.05 µm /encoder count

Repeatability

3.3 µm

Chamber vertical translation / tilt

Range (translation)

-13.62 mm to 14.58 mm
(wedge leveler 1)
-14.12 mm to 14.21 mm
(wedge leveler 2)

Resolution (design value)

0.40 µm /motor step (at actuator)
0.08 µm/ motor step
(at wedge leveler)
0.05 µm /encoder count

Repeatability (translation)

1.2 µm

Range (tilt)

± 1.5°

Repeatability (tilt)

1.92 µrad

Chamber lateral rotation

Range

± 2.5°

Resolution (design value)

1.40 x 10-4  °/motor fine step
(1/512, recommended)
7.489 x 10-6 °/encoder count

Repeatability

0.45 µrad

Performance Test Results

Chemistry chamber longitudinal position deviation after longitudinal translation
P470 - Chamber longitudinal position deviation after longitudinal translation - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany
Chemistry chamber lateral position deviation after lateral translation
P470_Chamber lateral position deviation after lateral translation - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany
Chemistry chamber vertical position deviation after vertical translation
P470_Chamber vertical position deviation after vertical translation - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany
Chemistry chamber tilt deviation after
tilt rotation
P470_Chamber tilt rotation deviation after tilt rotation - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany
Chemistry chamber lateral orientation deviation after lateral rotation
P470 - Chamber lateral orientation deviation after lateral rotation - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany
Differential pumping unit pressure drop
P470 - Differential pumping unit pressure drop - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany
Residual gas analysis
P470 - Residual gas analysis - Near ambient pressure experimental station for RIXS at SCS instrument of the European XFEL, Germany