Proposed ultraviolet free-electron laser at Brookhaven National Laboratory: A source for time-resolved biochemical spectroscopy
- Brookhaven National Lab., Upton, NY (United States)
- Mount Sinai School of Medicine, New York, NY (United States). Dept. of Biochemistry
Brookhaven National Laboratory is designing an ultraviolet free- electron laser (UV-FEL) user facility that will provide pico-second and sub-picosecond pulses of coherent ultraviolet radiation for wavelengths from 300 to 75 nm. Pulse width will be variable from abut 7 ps to {approx} 200 fs, with repetition rates as high as 10{sup 4} Hz, single pulse energies > 1 mJ and hence peak pulse power >200 MW and average beam power > 10 W. The facility will be capable of ``pump-probe`` experiments utilizing the FEL radiation with: (1) synchronized auxiliary lasers, (2) a second, independently tunable FEL beam, or (3) broad-spectrum, high-intensity x-rays from the adjacent National Synchrotron Light Source. The UV-FEL consists of a high repetition rate recirculating superconducting linear accelerator which feeds pulses of electrons to two magnetic wigglers. Within these two devices, photons from tunable ``conventional`` laser would be frequency multiplied and amplified. By synchronously tuning the seed laser and modulating the energy of the electron beam, tuning of as much as 60% in wavelength is possible between alternating pulses supplied to different experimental stations, with Fourier transform limited resolution. Thus, up to four independent experiments may operate at one time, each with independent control of the wavelength and pulse duration. The UV-FEL will make possible new avenues of inquiry in time studies of diverse field including chemical, surface, and solid state physics, biology and materials science. The experimental area is scheduled to include a station dedicated to biological research. The complement of experimental and support facilities required by the biology station will be determined by the interests of the user community. 7 refs., 5 figs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Inst. for Occupational Safety and Health, Rockville, MD (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10121664
- Report Number(s):
- BNL-47086; CONF-920124-8; ON: DE92007451
- Resource Relation:
- Conference: Society of Photo-Optical Instrumentation Engineers (SPIE) international symposium on laser spectroscopy,Los Angeles, CA (United States),19-24 Jan 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Briefing paper for the proposed ultraviolet free-electron laser (UV- FEL) facility at Brookhaven National Laboratory
Briefing paper for the proposed ultraviolet free-electron laser (UV- FEL) facility at Brookhaven National Laboratory
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07 ISOTOPES AND RADIATION SOURCES
37 INORGANIC
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PHYSICAL AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FREE ELECTRON LASERS
DESIGN
TUNING
SYNCHRONIZATION
WIGGLER MAGNETS
PULSED IRRADIATION
FAR ULTRAVIOLET RADIATION
NEAR ULTRAVIOLET RADIATION
RADIATION SOURCES
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DESIGN, FABRICATION, AND OPERATION
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INTERACTIONS BETWEEN BEAMS AND CONDENSED MATTER