In-vacuum undulator installed in a 6.5 GeV storage ring for producing brilliant 14.4 keV Mössbauer photons

Abstract

Using a newly developed in-vacuum type undulator installed in the 6.5 GeV TRISTAN Accumulation Ring at the National Laboratory for High Energy Physics, a beam comprising of more than 2.4×104 Mössbauer photons/s at 14.4 keV has been achieved from an enriched α-57Fe2O3 single crystal. The spectrum in terms of brilliance in the region from 5 to 25 keV agrees well with the calculation.