1980 年 49 巻 11 号 p. 1066-1081
The construction of the Photon Factory, the synchrotron radiation facility of National Laboratory for High Energy Physics, began in April 1978 and will be completed in March 1982. The facility includes a 2.5 GeV injector electron linac and a 2.5 GeV electron storage ring which will accumulate up to 500mA. The linac is equipped with two other extraction points at 0.4 and 1 GeV. The normal 0.96 T bending magnets of the storage ring produce synchrotron radiation with a critical wavelength of 3.1Å. A vertical wiggler with a 6 T superconducting magnet gives a critical wavelength of 0.5Å. Six beam lines will be built in Phase I, one for hard X-rays from the wiggler, two for X-rays, one for soft X-rays and two for VUV. 4_??_6 experimental stations will be attached to each beam line, and altogether 30 stations will be installed.