大型放射光施設 SPring-8

日　時：2009年3月6日(金)　 15:00-16:00
Date：15:00-16:00　March 6, 2009

場　所：蓄積リング棟２階会議室（計算機室）
Place：in front of central control room

講演者：田辺 敏也
Speaker：Toshiya Tanabe

所属：ブルックヘブン国立研究所（アメリカ）
Affiliate： Brookhaven National Laboratory, USA

演題：NSLS-IIプロジェクトの現状
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.

担当者：渡部 貴宏
Organizer：Takahiro Watanabe