High-brightness electron beams
Creating and controlling electron pulses with the emittance, duration, and energy spread needed for precise experiments.
Musumeci Research · UCLA
Electron beams.
Light sources.
Ultrafast science.
We develop electron beams and the instruments they make possible—from compact accelerators and free-electron lasers to ultrafast probes of materials.
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Our research is part of UCLA’s Particle Beam Physics Laboratory (PBPL) ↗, directed by James Rosenzweig. Pietro Musumeci is a PBPL principal investigator and leads the Pegasus experimental program.
Research directions
From beam physics
to scientific instruments.
Ultrafast electron science
Developing diffraction, microscopy, and spectroscopy instruments to investigate the structure and dynamics of matter.
Free-electron lasers & light sources
Understanding coherent emission and laser–electron interactions to develop compact, efficient radiation sources.
Advanced acceleration & diagnostics
Exploring new accelerating fields and measuring the phase space of beams as they evolve.
In the laboratory · 2026
A sharper probe
of quantum materials.
In collaboration with Anshul Kogar’s group, we are developing electron energy-loss spectroscopy instrumentation that brings together momentum resolution, high energy resolution, and low-temperature measurements.
UCLA’s 2026 feature describes the collaboration and the instrument under construction.
Read the UCLA feature ↗People & scientific history
A laboratory is built
by generations of people.
From Saturnus and Neptune to Pegasus, PBPL’s history connects students, postdoctoral researchers, universities, national laboratories, and industry.
Explore the people & history archive →