PHOTOELECTRON GENERATED AMPLIFIED SPONTANEOUS RADITION SOURCE (PEGASUS)

The PEGASUS laboratory is home of a small university-size accelerator beamline for research in ultrafast beams, advanced beam manipulation and diagnostics techniques. Experiments currently planned include novel beam instrumentation like RF deflectors and Electro-Optic Sampling Technique, exploration of new regimes of operation of RF photoinjectors, high resolution longitudinal phase space measurements and ultrafast relativistic electron diffraction.

History

• Occupies same facility as the old Saturnus Lab (home of the first UCLA SASE experiments)
• Construction Begun Spring 1998
• Learned from Experience with Saturnus Lab, Shares Resources with Neptune, the other on-campus accelerator laboratory
• Up to 2006 operated as a Photoinjector Test Facility and FEL physics Lab.
• As of Spring 2007, under the supervision of Assistant Professor Pietro Musumeci the Pegasus laboratory has been commissined as an advanced photoinjector laboratory for conducting research in novel dynamical regimes of beam evolution, ultrafast beam sources and diagnostics.
• One of the main goals of the newly renovated laboratory is the development of a new, potentially revolutionary, technique in ultrafast material studies : Ultrafast relativistic electron diffraction.

Current Pegasus Parameters

Value	Parameter
Energy	4 MeV
Energy Spread	0.5 %
Emittance	<1 mm-mrad
Bunch Charge	1-100 pC
Bunch Length	<100 fs - 2 ps

Experiments

Ultrafast relativistic electron diffraction

Longitudinal phase space measurements

Electro-optic sampling diagnostics

Recent papers

[1] P. Musumeci, J. Moody, and G. Gatti. Ultrafast beam research at the Pegasus Laboratory. Proceedings of 2007 Particle Accelerator Conference, Albuquerque, NM, 2007

[2] P. Musumeci et al., Nuclear Instruments and Methods, 593, 103 (2008)

[3] P. Musumeci et al. Phys. Rev. Lett., 100, 244801 (2008)

[4] P. Musumeci et al. Ultramicroscopy,108, 1450 (2008)

[5] C. Scoby et al., Proceedings of Advanced Accelerator Workshop 2008, Santa Cruz, CA

[6] P. Musumeci et al., Proceedings of European Particle Accelerator Conference, Genova, Italy, 2008