Briefing paper for the proposed ultraviolet free-electron laser (UV- FEL) facility at Brookhaven National Laboratory
- comp.
The proposed Brookhaven National Laboratory ultraviolet free-electron laser (UV-FEL) user facility will provide picosecond and sub-picosecond pulses of coherent ultraviolet radiation for wavelengths from 300 to 75 nm. Pulse width will be variable from about 7 ps to {approx} 200 fs, with repetition rates as high as l0{sup 4}Hz, single pulse energies > 1 NJ 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 an insertion device in the x-ray ring of 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`` lasers are 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. A total of eight experimental stations are planned, with two currently assigned to general users, two each for solid state and chemical physics, and one each for atomic physics and biology. This document provides a few representative examples of experiments in these fields, as well as an introduction to the facility, its limitations, and its potential for future growth.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10178659
- Report Number(s):
- BNL-47802; ON: DE92040568
- Resource Relation:
- Other Information: PBD: 15 Jul 1992
- Country of Publication:
- United States
- Language:
- English
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