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  - 

TY  - CONF
AU  - Yamaguchi, A.
AU  - Hayashizaki, N.
AU  - Iwata, Y.
AU  - Nakayama, K.
AU  - Okaya, K.
AU  - Sato, K.
AU  - Takeuchi, T.
AU  - Yamada, S.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - 2D TRACKING CODE FOR DRIFT TUBE LINAC
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A 2D tracking code has been developed for Alternating-Phase-Focusing drift tube linacs (APF-DTL). This code can design DTLs with a 2D electric field simulation and particle tracking by approximate equations. In this paper, we describe an outline of the 2D tracking code and a comparison of 2D tracking results and 3D simulation.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3482
EP  - 3484
KW  - DTL
KW  - linac
KW  - simulation
KW  - focusing
KW  - drift-tube-linac
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPMP014
UR  - http://jacow.org/ipac2019/papers/thpmp014.pdf
ER  -