The time-resolved atomic, molecular and optical science instrument at the Linac Coherent Light Source

Area of Science:

• Atomic, Molecular, and Optical (AMO) Science
• Ultrafast Science
• Soft X-ray Physics

Background:

• The need for advanced experimental capabilities in AMO science.
• Limitations of previous instruments at SLAC.
• The potential of soft X-ray free-electron lasers.

Purpose of the Study:

• Introduce the newly constructed Time-Resolved Atomic, Molecular, and Optical science instrument (TMO).
• Highlight TMO's unique capabilities and flexibility.
• Expand experimental possibilities at the SLAC National Accelerator Laboratory.

Main Methods:

• Utilizing two linear accelerators: a copper accelerator (120 Hz) for high per-pulse energy and a superconducting accelerator (1 MHz) for high average intensity.
• Employing a soft X-ray free-electron laser with a variable-gap undulator.
• Implementing two in-line X-ray beam focus spots and a dynamic reaction microscope with a sub-micrometer focus.

Main Results:

• TMO supports a wide range of experimental techniques previously unavailable at LCLS.
• The instrument is optimized for studying ultrafast electronic and molecular phenomena.
• Sub-femtosecond soft X-ray pulse generation is fully leveraged.

Conclusions:

• The TMO instrument significantly enhances research capabilities in AMO science and ultrafast phenomena.
• Its flexible design and advanced light source enable novel investigations.
• TMO opens new avenues for studying dynamic reactions and electronic processes at the femtosecond timescale.