JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Alharthi, F. AU - Bandiera, L. AU - Chaikovska, I. AU - Chehab, R. AU - Diefenbach, J. AU - Khomyshyn, O. AU - Klekots, D.M. AU - Lauth, W. AU - Mazzolari, A. AU - Mytrochenko, V.V. AU - Ogur, S. AU - Romagnoni, M. AU - Sievers, P. AU - Soldani, M. AU - Sytov, A.I. AU - Ushakov, A. AU - Wallon, S. AU - Zhao, Y. ED - Zimmermann, Frank ED - Tanaka, Hitoshi ED - Sudmuang, Porntip ED - Klysubun, Prapong ED - Sunwong, Prapaiwan ED - Chanwattana, Thakonwat ED - Petit-Jean-Genaz, Christine ED - Schaa, Volker R.W. TI - Target Studies for the FCC-ee Positron Source J2 - Proc. of IPAC2022, Bangkok, Thailand, 12-17 June 2022 CY - Bangkok, Thailand T2 - International Particle Accelerator Conference T3 - 13 LA - english AB - FCC-ee injector study foresees 3.5~nC electron and positron bunches with 200 Hz repetition and 2 bunches per linac pulse at 6~GeV extraction energy. Regarding the possible options of positron production, we retain both of the conventional amorphous target and the hybrid target options. The hybrid scheme uses an intense photon production by 6 GeV electrons impinging on a crystal oriented along a lattice axis. In such a way, it involves two targets: a crystal as a photon radiator and an amorphous target-converter. Therefore, to avoid early failure or damage of the target, the candidate materials for the crystal and conversion targets have started to be tested by using the intense electron beam at Mainzer Mikrotron in Germany by the end of 2021. By manipulating the beam intensity, focusing, and chopping, a Peak Energy Deposition Density in the tested targets could be achieved close to that generated by the electron/photon beam in the FCC-ee positron target. Radiation-damage studies of the crystal sample have been also performed allowing estimating the effect on the photon enhancement used in the hybrid positron source. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1979 EP - 1982 KW - target KW - radiation KW - positron KW - electron KW - photon DA - 2022/07 PY - 2022 SN - 2673-5490 SN - 978-3-95450-227-1 DO - doi:10.18429/JACoW-IPAC2022-WEPOPT054 UR - https://jacow.org/ipac2022/papers/wepopt054.pdf ER -