Testing of a `hard' X-ray interferometer for experimental investigations

Area of Science:

• Physics
• Optics
• Materials Science

Background:

• Traditional interferometers can be susceptible to environmental disturbances.
• The development of stable interferometers is crucial for high-precision measurements.

Purpose of the Study:

• To test a newly designed hard X-ray LLL interferometer for experimental investigations.
• To evaluate the interferometer's stability, sensitivity, and applicability in object and deformation studies.

Main Methods:

• Construction of a rigid interferometer with a base and ceiling connected by columns.
• Testing for preliminary moiré effects and intensity distribution uniformity.
• Assessment of sensitivity to mechanical stress and fringe pattern generation using a wedge.

Main Results:

• The interferometer exhibited no uncontrollable preliminary moiré due to its rigid structure.
• Uniform intensity distribution was observed in the interfering beams.
• High sensitivity to minor mechanical stresses was confirmed, necessitating free placement on a goniometer head.
• Constant-thickness fringes were achieved with a vertically apexed wedge.

Conclusions:

• The hard X-ray LLL interferometer offers a stable platform for investigations.
• Despite limited specimen volume, the design is suitable for object and deformation studies.
• Further optimization can overcome existing limitations for broader applications.