Compact X-ray laser amplifier in the "Water Window"

Area of Science:

• Molecular biology
• X-ray science
• Biophysics

Background:

• The "water-window" spectral range (2.3–4.4 nm) is ideal for imaging biological samples.
• Coherent X-ray sources are needed for high-contrast, time-resolved imaging of water-rich bio-systems.
• Current table-top X-ray sources lack the necessary gain for advanced applications.

Purpose of the Study:

• To demonstrate the generation of high gain coherent X-rays in the water-window spectral range.
• To present a novel table-top device for producing X-rays suitable for bio-imaging.
• To achieve high gain in He-like CV ions for potential molecular biology applications.

Main Methods:

• Utilized a table-top device to generate X-rays.
• Focused on He-like Carbon V (CV) ions.
• Achieved X-ray generation via transitions to the ground state at 4.03 nm.

Main Results:

• Generated a high gain of approximately 60/cm in He-like CV ions.
• Successfully produced coherent X-rays within the 4.03 nm water-window spectral range.
• Demonstrated a significant advancement in table-top X-ray source technology.

Conclusions:

• The study presents the first demonstration of high gain X-ray generation in the water-window using a table-top device.
• This achievement offers a promising tool for time-resolved, high-contrast imaging of biological samples.
• The developed technology has significant implications for molecular biology and biophysics research.