TY  - CONF
AU  - Kuriki, M.
AU  - Hayano, H.
AU  - Jin, X.J.
AU  - Kashiwagi, S.
AU  - Konomi, T.
AU  - Piot, P.
AU  - Power, J.G.
AU  - Sakaue, K.
AU  - Seimiya, Y.
AU  - Tamura, R.
AU  - Washio, M.
AU  - Yamamoto, N.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Effect of Initial Parameters on the Super Flat Beam Generation with the Phase-Space Rotation for Linear Colliders
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Linear collider is a concept to realize e⁺e⁻ collision beyond the limitation of the ring colliders by the synchrotron radiation. To obtain an enough luminosity, eg. 1.0·10⁺³⁴ cm⁻²sec⁻¹, the beam is focused down to nano-meter size with a high aspect ratio. This super flat beam is useful to improve the luminosity and to compensate the beam-beam effect, eg. Beamstrahlung. In a conventional design, the super-flat beam is produced by radiation damping in a storage ring. We propose to produce this super-flat beam with phase-space rotation techniques. We employ both Round to Flat Beam Transformation and Transverse to Longitudinal Emittance eXchange, the super flat beam can be generated by controlling the space-charge effect which spoiled the performance. We present the RFBT performance with respect to the initial conditions, i.e. beam size, initial emittance, solenoid field (strength and profile), etc.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 442
EP  - 444
KW  - emittance
KW  - simulation
KW  - gun
KW  - collider
KW  - solenoid
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPMP009
UR  - http://jacow.org/ipac2019/papers/mopmp009.pdf
ER  - 

TY  - CONF
AU  - Hosaka, Y.
AU  - Honda, Y.
AU  - Kosuge, A.
AU  - Omori, T.
AU  - Sakaue, K.
AU  - Takahashi, T.
AU  - Uesugi, Y.
AU  - Urakawa, J.
AU  - Washio, M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Mode-Locked Pulse Oscillation of a Self-Resonating Enhancement Optical Cavity
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A power enhancement optical cavity is a compelling means of realizing a pulsed laser with a high peak power and high repetition frequency, which is not feasible using a simple amplifier scheme. However, a precise feedback system is necessary for maintaining the narrow resonance condition of the optical cavity; this has become a major technical issue in developing such cavities. We have developed a new approach that does not require any active feedback system, by placing the cavity in the outer loop of a laser amplifier. We report on the first demonstra-tion of a mode-locked pulse oscillation using the new system.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1471
EP  - 1474
KW  - cavity
KW  - laser
KW  - resonance
KW  - controls
KW  - feedback
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPGW032
UR  - http://jacow.org/ipac2019/papers/tupgw032.pdf
ER  - 

TY  - CONF
AU  - Morita, R.
AU  - Higashiguchi, T.
AU  - Koshiba, Y.
AU  - Ota, S.
AU  - Sakaue, K.
AU  - Urakawa, J.
AU  - Washio, M.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Development of Yb-Based Laser System for Crab Crossing Laser-Compton Scattering
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - We are going to demonstrate the principle of crab crossing in laser-Compton scattering which creates head-on collision in a pseudo manner to enhance the intensity of laser-Compton X-ray. When the electron beam is tilted by half of the collision angle, the scat-tered X-rays becomes the largest. Calculation shows that more than threefold luminosity will be achieved in our system and could be larger luminosity depending on the beam parameters. The intensity of scattered light can be efficiently enhanced by using a collision laser with high intensity, high quality and ultrashort pulse duration. Thus, we have introduced a regenera-tive amplifier using ceramics thin-disk as a collision laser and developed a dedicated laser system. In this conference, we will report on our laser system and results of crab crossing laser-Compton scattering.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3657
EP  - 3659
KW  - laser
KW  - electron
KW  - luminosity
KW  - experiment
KW  - scattering
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPGW035
UR  - http://jacow.org/ipac2019/papers/thpgw035.pdf
ER  -