HIGS . . .
The newest accelerator facility operated by TUNL is the HIGS at the Duke Free Electron Laser Laboratory (DFELL). The DFELL houses an accelerator based photon source in a 52,000 square-foot facility. There are two types of primary photon beams available at the DFELL: the HIGS with energies from 2 to 60 MeV and an optical beam with continuous tunable wavelength from IR to VUV. Both photon beam types are produced by an electron storage ring free electron laser (FEL) and its undulators.
What is HIGS
At the High Intensity Gamma-Ray Source (HIGS) beams are produced by Compton backscattering of the FEL photons in the resonator cavity with electrons in the Duke Electron Storage Ring (DSR). The gamma-ray beam is nearly mono-energetic, intense, and highly polarized. The beam energy is tunable by adjusting the electron energy and magnetic field strength in the undulators, and the energy spread of the gamma-ray beam is selectable down to about 1% by collimation. The current gamma-ray beam capabilities include reliable delivery of a nearly mono-energetic linearly or circularly polarized gamma-ray beam to target with polarization greater than 90% in the energy range from 2 to 60 MeV. The total beam flux before collimation is greater than 100 million gamma/s. The gamma-ray beam parameters are summarized below.
TUNL Main Office Contacts
1 (919) 660 2600
Duke University, Room 416,
TUNL Bldg, P. O. Box 90308,
Durham, NC 27708-0308, USA
bwest@tunl.duke.edu