TY - JOUR
T1 - Production of high brightness γ rays through backscattering of laser photons on high-energy electrons
AU - Sakai, I.
AU - Aoki, T.
AU - Dobashi, K.
AU - Fukuda, M.
AU - Higurashi, A.
AU - Hirose, T.
AU - Iimura, T.
AU - Kurihara, Y.
AU - Okugi, T.
AU - Omori, T.
AU - Urakawa, J.
AU - Washio, M.
AU - Yokoya, K.
N1 - Funding Information:
We would like to acknowledge all members of the KEK-ATF group for the operation of the damping ring and Dr. S. Yamada and Dr. S. Iwata for their continuous encouragement. For the design of the Compton chamber, we express our thanks for close cooperation with Dr. I. Ben-Zvi and Dr. I. Pogorelsky at BNL-ATF and Dr. A. Tsunemi at the Sumitomo Heavy Industries, Ltd. This research was partially supported by a Research Fund of KEK for Cooperative Developments, a Grant-in-Aid for Scientific Research [(B)11554010, (A)11694092], and a research program of Japan/U.S. Cooperation in the Field of High-Energy Physics.
PY - 2003
Y1 - 2003
N2 - Based on the requirements from a conceptual design of a polarized positron beam for future linear colliders, we constructed a special collision system with a short focal length of 150 mm of the laser beams so as to produce γ rays through inverse Compton scattering. In order to achieve efficient laser-electron collisions, we created a special optics to produce very small e --beam sizes of σ ex0 = 7.6 μm and σ ey0 = 5.4 μm in the horizontal and vertical directions at the collision point. Using laser light with a wavelength of 532 nm and an e - beam of 1.28 GeV provided from the ATF-damping ring at KEK, we generated 2 × 10 5 γ rays with a time duration of 26 ps in rms, leading to a peak brightness of 1.7 × 10 18/(mrad 2mm 20.1%bandwidth s) near to the maximum energy of 56 MeV.
AB - Based on the requirements from a conceptual design of a polarized positron beam for future linear colliders, we constructed a special collision system with a short focal length of 150 mm of the laser beams so as to produce γ rays through inverse Compton scattering. In order to achieve efficient laser-electron collisions, we created a special optics to produce very small e --beam sizes of σ ex0 = 7.6 μm and σ ey0 = 5.4 μm in the horizontal and vertical directions at the collision point. Using laser light with a wavelength of 532 nm and an e - beam of 1.28 GeV provided from the ATF-damping ring at KEK, we generated 2 × 10 5 γ rays with a time duration of 26 ps in rms, leading to a peak brightness of 1.7 × 10 18/(mrad 2mm 20.1%bandwidth s) near to the maximum energy of 56 MeV.
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U2 - 10.1103/PhysRevSTAB.6.091001
DO - 10.1103/PhysRevSTAB.6.091001
M3 - Article
AN - SCOPUS:18244362308
SN - 1098-4402
VL - 6
SP - 12
EP - 25
JO - Physical Review Special Topics - Accelerators and Beams
JF - Physical Review Special Topics - Accelerators and Beams
IS - 9
M1 - 091001
ER -