Paper |
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WEPOPT054 |
Target Studies for the FCC-ee Positron Source |
1979 |
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- 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. Zhao
CERN, Meyrin, Switzerland
- M. Soldani
Università degli Studi di Ferrara, Ferrara, Italy
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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.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOPT054
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About • |
Received ※ 16 June 2022 — Revised ※ 16 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 21 June 2022 |
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WEPOPT062 |
Optimisation of the FCC-ee Positron Source Using a HTS Solenoid Matching Device |
2003 |
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- Y. Zhao, S. Döbert, A. Latina, S. Ogur
CERN, Meyrin, Switzerland
- B. Auchmann, P. Craievich, J. Kosse, R. Zennaro
PSI, Villigen PSI, Switzerland
- I. Chaikovska, R. Chehab
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
- M. Duda
IFJ-PAN, Kraków, Poland
- P.V. Martyshkin
BINP SB RAS, Novosibirsk, Russia
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In this paper, we present the simulation and optimisation of the FCC-ee positron source, where a high-temperature superconducting (HTS) solenoid is used as the matching device to collect positrons from the target. The "conventional" target scheme is used which simply consists of amorphous tungsten. The target is placed inside the bore of the HTS solenoid to improve the accepted positron yield at the entrance of the damping ring and the location of the target is optimised. The latest recommended baseline beam parameters are used and presented. An optimisation of the ideal positron yield using the analytic SC solenoid on-axis field is also performed and shows that the design of the HTS solenoid is optimal as far as the accepted positron yield is concerned.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2022-WEPOPT062
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|
About • |
Received ※ 07 June 2022 — Revised ※ 14 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 16 June 2022 |
Cite • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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