JJ X-ray Products
Explore our innovative products and technologies
Slit Systems
Over the last 25 years, JJ X-Ray has designed a large portfolio of slit systems used at x-ray and neutron facilities all over the world. Our top priority is to give the customer the best solution whether they need the slit system to be standard, modified or customized.

Collimators
All collimators are based on a custom design and are divided into three categories defined by the orientation of the foils.

Optics
JJ X-Ray A/S supplies high-precision refractive and reflective optics for synchrotron applications. Their refractive optics include SCD CRLs and lenses in beryllium, aluminum, and nickel for beam focusing. Reflective optics feature customizable mirror systems suitable for UHV/XHV environments, offering options like bending, cooling, and heating for enhanced stability and performance.

Monochromators
JJ X-Ray A/S provides a range of monochromators designed for precise control of X-ray wavelengths in various research and industrial applications. Monochromators are essential for selecting specific wavelengths from an X-ray beam, improving the quality and resolution of diffraction and spectroscopy measurements.

Diagnostics and Analysis
JJ X-Ray offers a range of cutting-edge products designed to enhance the precision and reliability of X-ray analysis systems. Diagnostic and analytic tools are essential for accurately measuring and analyzing X-ray beams, ensuring optimal performance across a variety of applications.

Positioning Systems
JJ X-Ray offers an extensive selection of positioning systems, designed for exact motion and endurance with a focus on scientific sector. Achieving groundbreaking results hinges on precise control, and our systems deliver reliable, repeatable motions for a variety of applications.

Custom Solutions
When working on complex or custom projects, we always work in close collaboration with the customer to make sure all requirements are met, and projects are executed in a timely manner.

Full Beamlines
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Attenuator
The Solid Attenuator Assembly is originally designed to precisely attenuate the XFEL beam intensity in several different circumstances: In cases where the full intensity would be harmful, or would create thermal distortions on downstream x-ray optical devices, and to adjust the beam intensity delivered to the sample for fluence or intensity-dependent experiments.
In the first case, the attenuation will typically be adjusted once per experiment, whereas in the second case, the user will make frequent changes throughout the duration of the experiment. Beamline staff will control the SAA remotely from the Instrument control room, defining the attenuation configuration, and the system’s fine alignment.
Each SAA will be integrated into Ultra-High Vacuum (UHV) beamlines and must be capable of indefinite operation while illuminated by the XFEL beam. The high heat load of the XFEL beam requires that the SAA is water-cooled, and the system can easily remove >50W absorbed power. More recent attenuator assemblies e.g. for LCLS-II at SLAC are designed to remove 200W.
Mechanical design
The solid attenuator assembly allows the insertion of a combination of absorbers with different thicknesses and different materials. Four arms (or rods) holding six different absorbers each can be inserted into the beam, giving a total of 24 different absorbers. Any absorber on one rod can be inserted into the beam with any combination of the absorbers on the three other rods giving the total number of combinations of 64=1296.
Categories:
Technical Specifications
Number of absorbers
6 per arm, 4 arms = 24 absorbers
Absorber thickness
0.1 mm to 16 mm
Cooling capacity
50 W or 200 W (depending on design)
Positioning accuracy
10 µm
Repeatability
2-3 µm
Common x-translation stroke
20 mm
Vacuum level
UHV (1·10-9 mbar)
| Position | Material | Arm 1 | Arm 2 | Arm 3 | Arm 4 |
|---|---|---|---|---|---|
| 1 | Diamond | 0.1 mm | 0.2 mm | 0.4 mm | 0.8 mm |
| 2 | Diamond | 0.4 mm | 0.8 mm | 1.6 mm | 3.2 mm |
| 3 | Silicon | 0.2 mm | 0.4 mm | 0.8 mm | 1.6 mm |
| 4 | Silicon | 0.8 mm | 1.6 mm | 3.2 mm | 6.4 mm |
| 5 | B4C | 0.5 mm | 1.0 mm | 2.0 mm | 4.0 mm |
| 6 | B4C | 2.0 mm | 4.0 mm | 8.0 mm | 16.0 mm |



