SPring-8, the large synchrotron radiation facility

Date: 15:00-16:00 March 6, 2009

Place: in front of central control room

Speaker: Toshiya Tanabe

Affiliate: Brookhaven National Laboratory, USA

Title: Current Status of NSLS-II Project

Abstract:
National synchrotron light source –II (NSLS-II) will provide the electron beam with sub-nm.rad horizontal emittance and 500mA of electron beam current with top-off capability by the year 2014.  Damping wigglers with peak field of 1.8T will be utilized for both emittance reduction purpose and hard x-ray source for users.  The bending magnet field is chosen to be relatively weak (0.4T) compared to other light sources in order to minimize the dispersion in the arc.  Injectors will be composed of a 200MeV linac and a full energy (3 GeV) booster ring. 

There will be six phase-I beamlines.  One (X-ray powder diffraction) will utilize in-line DW (7m total), three (Hard X-ray nanoprobe, Coherent hard X-ray scattering, Inelastic X-ray scattering) will use 3m in-vacuuum undulators (IVUs), another one (sub-micron resolution X-ray spectroscopy) will employ a shorter (~1.2m) canted IVU.  Elliptically Polarized Undulators (EPUs) will be used for coherent soft-X-ray scattering and polarization beam line. Due to lack of hard X-ray flux from weak dipole field (0.4 Tesla), three pole wigglers of peak field over 1 Tesla will be mainly used by NSLS bending magnet beam line users.  Quasi-periodic EPU and superconducting wiggler have been planned for the second phase of the project.

As of February 18, 2009, a construction firm has been selected for conventional facility and a ground breaking ceremony is planned in April.  Major procurement such as magnets, vacuum chamber and linac will follow.

Organizer: Takahiro Watanabe