TY  - CONF
AU  - Matsuba, S.
AU  - Harada, K.
AU  - Katoh, M.
AU  - Kawase, K.
AU  - Shimada, K.S.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Design Study of an Electron Storage Ring for the Future Plan of Hiroshima Synchrotron Radiation Center.
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Hiroshima synchrotron radiation center equips a 700 MeV electron storage ring nicknamed HiSOR. It has been operated for more than 20 years. The emittance of HiSOR is 400 nm, which is larger by one or more orders of magnitude than typical modern synchrotron light sources. Therefore, as the future plan of the facility, a new low emittance storage ring is desired. Several designs have been examined. In the newest version, we have selected the lattice structure similar to ASTRID 2 compact light source in Aarhus University, Denmark. The design goal is the energy of around 500 MeV, the circumference shorter than 50 m and the emittance smaller than 10 nm with straight sections for undulators more than 4. In this conference, we report the latest result from the design study.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 200
EP  - 202
KW  - storage-ring
KW  - synchrotron
KW  - radiation
KW  - emittance
KW  - synchrotron-radiation
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPGW048
UR  - http://jacow.org/ipac2019/papers/mopgw048.pdf
ER  - 

TY  - CONF
AU  - Matsuba, S.
AU  - Fujimoto, M.
AU  - Hosaka, M.
AU  - Katoh, M.
AU  - Kawase, K.
AU  - Konomi, T.
AU  - Miyamoto, A.
AU  - Sasaki, S.
AU  - Yamamoto, N.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Experimental Demonstration of Vector Beam Generation With Tandem Helical Undulators
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Vector beam is a light beam with spatially modulated polarization state across the beam. Particular examples of vector beam are radial and azimuthal polarization which have donut-shaped intensity and radially and azimuthally oriented linear polarization state. Vector beam has long been interest in the laser community and it is well known that vector beam can be created by superposing two optical vortex beams which have spiral wave fronts. It has been demonstrated that optical vortex beam can be generated from a helical undulator as harmonics. Therefore, we propose a scheme to generate vector beam by superposing two optical vortex beams from two helical undulators in tandem, based on the principle of the ’crossed undulator’. The experiment was carried out at UVSOR BL1U. In this paper, we describe the principle and the experimental details.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1766
EP  - 1768
KW  - polarization
KW  - undulator
KW  - experiment
KW  - radiation
KW  - simulation
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPRB037
UR  - http://jacow.org/ipac2019/papers/tuprb037.pdf
ER  -