NewSUBARU synchrotron radiation facility

NewSUBARU facility has a 1.0-1.5 GeV electron storage ring 118 m in circumference. Electron beams are delivered from SPring-8 LINAC at the energy of 1.0 GeV. In addition to twelve normal bending magnets, our ring has six inverse bending magnets to easily make momentum compaction factor positive, negative and small values. The ring has four 2.5 m long and four 14 m long straight sections, at which magnets for injection, a RF cavity, insertion devices are installed. As insertion devices we use a 11 m long undulator, a short undulator (1.5m) and an optical klystron. In the 1.0 GeV user time, top-up operation is performed to keep the stored current 220 mA. In the 1.5 GeV user time. beam energy is ramped up after accumulation of beam current of 400mA at 1.0 GeV. By an automatic COD (closed orbit distortion) correction, the stability of beam positions is kept within about 10 microns.

The detail of our electron storafe ring is here.

Layout of NewSUBARU synchrotron Radiation Facility

The following figure shows radiation spectrum avaliable at NewSUBARU. Synchrotron radiation from a bending magnet is a continuous-spectrum light. The spectrum ranges from IR to soft X-ray. As insertion devices, we use two undulators, that is, a short undulator (SU) and an 11m long undulator (LU). Undulator light is quasi-monochromatic and has higher photon flux compared to light from a bending magnet.

Synchrotron Radiation Brightness from bending magnets and undulators of NewSUBARU

In addition to undulators and bending magnets, we have been developping new radiation sources. The following figure shows the photon beam energy of NewSUBARU. In a high energy regime, a quasi-monochromatic gamma-ray beam generated by laser Compton back-scattering is now avaliable at BL01. In a long-wavelength regime, the generation of coherent tera heltz radiation from short electron bunches circulating in the NewSUBARU storage ring is under study.

Spectrum of New Radiation Sources developping at NewSUBARU