@misc{oai:repo.qst.go.jp:00086544, author = {Ohgaki, Hideaki and Ali, Khaled and Kii, Toshiteru and Zen, Heishun and Takehito, Hayakawa and Toshiyuki, Shizuma and Fujimoto, Masaki and Taira, Yoshitaka and Takehito, Hayakawa and Toshiyuki, Shizuma}, month = {Jun}, note = {Laser Compton Scattering Gamma-ray beam (F-LCS), which has a flat distribution in the energy spectrum and the spatial distribution with a small beam size, has been developed to study an isotope selective CT Imaging ap-plication in the beamline BL1U in UVSOR. We propose generation of an F-LCS beam by using a circular mo-tioned electron beam, which can be generated by a helical undulator installed in a storage ring, and collision with an intense laser beam. A simulation study on the LCS beam-line BL1U in UVSOR shows a weak magnetic field (K=0.2) can generate an F-LCS beam. A demonstration experiment has been carried out in UVSOR with the AP-PLE-II undulator. The spectra of the LCS beams were measured by using a 120% Ge detector. As a result, the energy bandwidth of the LCS peak was observed. The energy bandwidth measured in the energy spectra and the distribution map agreed with the EGS5 simulation., The 13th International Particle Accelerator Conference}, title = {GENERATION OF FLAT-LASER COMPTON SCATTERING GAMMA-RAY BEAM IN UVSOR}, year = {2022} }