Journals of Accelerator Conferences Website (JACoW)

'Journal of Accelerator Conferences Website' (JACoW) is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.

Title	Target Studies for the FCC-ee Positron Source
Authors	F. Alharthi, I. Chaikovska, R. Chehab, S. Ogur, A. Ushakov, S. Wallon Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France L. Bandiera, A. Mazzolari, M. Romagnoni, A.I. Sytov INFN-Ferrara, Ferrara, Italy J. Diefenbach, W. Lauth IKP, Mainz, Germany O. Khomyshyn Taras Shevchenko National University of Kyiv, Kyiv, Ukraine D.M. Klekots National Taras Shevchenko University of Kyiv, The Faculty of Physics, Kyiv, Ukraine V.V. Mytrochenko NSC/KIPT, Kharkov, Ukraine P. Sievers, Y. Zhaopresenter CERN, Meyrin, Switzerland M. Soldani Università degli Studi di Ferrara, Ferrara, Italy
Abstract	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.
Paper	download WEPOPT054.PDF [2.400 MB / 4 pages]
Cite	download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote
Conference	IPAC2022
Series	International Particle Accelerator Conference (13th)
Location	Bangkok, Thailand
Date	12-17 June 2022
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	Frank Zimmermann (CERN, Meyrin, Switzerland); Hitoshi Tanaka (RIKEN, Hyogo, Japan); Porntip Sudmuang (SRLI, Nakhon, Thailand); Prapong Klysubun (SRLI, Nakhon, Thailand); Prapaiwan Sunwong (SRLI, Nakhon, Thailand); Thakonwat Chanwattana (SRLI, Nakhon, Thailand); Christine Petit-Jean-Genaz (CERN, Meyrin, Switzerland); Volker R.W. Schaa (GSI, Darmstadt, Germany)
Online ISBN	978-3-95450-227-1
Online ISSN	2673-5490
Received	16 June 2022
Revised	16 June 2022
Accepted	17 June 2022
Issue Date	21 June 2022
DOI	doi:10.18429/JACoW-IPAC2022-WEPOPT054
Pages	1979-1982
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.