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.
Experimental Program at the HIGS Facility
All design capabilities and baseline
performance specifications for Gamma-ray beam production have been
demonstrated at the upgraded High Intensity Gamma-ray Source
(HIGS). The current Gammay-ray beam capabilities are:
reliable delivery of a nearly mono-energetic linear or circular
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 108 gamma/s. Facility commissioning
experiments are underway and will continue through December
2008. Initial results indicate that the signal-to-background ratio in
nuclear resonance fluorescence experiments at HIGS is about a
factor of 30 larger than similar experiments conducted with
Gamma-ray beams produced with bremsstrahlung sources.
Below are some of the recent research highlights and a list of
currently scheduled runs at HIGS:
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