Fully Coherent X-Ray Pulses from a Regenerative-Amplifier Free-Electron Laser

Journal Article · Fri Apr 14 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.144801· OSTI ID:20777143

Zhirong, Huang; Ruth, Ronald D ^[1]

---

1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)

We propose and analyze a regenerative-amplifier free-electron laser (FEL) to produce fully coherent, hard x-ray pulses. The method makes use of narrow-bandwidth Bragg crystals to form an x-ray feedback loop around a relatively short undulator. Self-amplified spontaneous emission (SASE) from the leading electron bunch in a bunch train is spectrally filtered by the Bragg reflectors and is brought back to the beginning of the undulator to interact repeatedly with subsequent bunches in the bunch train. The FEL interaction with these short bunches regeneratively amplifies the radiation intensity and broadens its spectrum, allowing for effective transmission of the x rays outside the crystal bandwidth. The spectral brightness of these x-ray pulses is about 2 to 3 orders of magnitude higher than that from a single-pass SASE FEL.

• OSTI ID: 20777143
• Journal Information: Physical Review Letters, Vol. 96, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.96.144801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
BEAM BUNCHING
BRAGG REFLECTION
BRIGHTNESS
CRYSTALS
ELECTRON EMISSION
ELECTRONS
FEEDBACK
FREE ELECTRON LASERS
HARD X RADIATION
INTERACTIONS
PULSES
TRANSMISSION
WIGGLER MAGNETS
X-RAY LASERS