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| TUZD1 |
The Electron-Positron Future Circular Collider (FCC-ee) |
315 |
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- F. Zimmermann, M. Benedikt
CERN, Meyrin, Switzerland
- K. Oide
DPNC, Genève, Switzerland
- T.O. Raubenheimer
SLAC, Menlo Park, California, USA
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Funding: Work supported by the European Union’s H2020 Framework Programme under grant agreement no.~951754 (FCCIS).
The Future Circular electron-positron Collider (FCC-ee) is aimed at studying the Z and W bosons, the Higgs, and top quark with extremely high luminosity and good energy efficiency. Responding to a request from the 2020 Update of the European Strategy for Particle Physics, in 2021 the CERN Council has launched the FCC Feasibility Study to examine the detailed implementation of such a collider. This FCC Feasibility Study will be completed by the end of 2025 and its results be presented to the next Update of the European Strategy for Particle Physics expected in 2026/27.
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Slides TUZD1 [10.072 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-NAPAC2022-TUZD1
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| About • |
Received ※ 03 August 2022 — Revised ※ 11 August 2022 — Accepted ※ 21 August 2022 — Issue date ※ 02 September 2022 |
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| WEPA01 |
Beam Dynamics Optimization of a Low Emittance Photoinjector Without Buncher Cavities |
615 |
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- J. Qiang
LBNL, Berkeley, California, USA
- F. Ji, T.O. Raubenheimer
SLAC, Menlo Park, California, USA
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The photoinjector plays an important role in generating high brightness low emittance electron beam for x-ray free electron laser applications. In this paper, we report on beam dynamics optimization study of a low emittance photoinjector based on a proposed superconducting gun without including any buncher cavities. Multi-objective optimization with self-consistent beam dynamics simulations was employed to attain the optimal Pareto front.
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-NAPAC2022-WEPA01
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| About • |
Received ※ 02 August 2022 — Revised ※ 05 August 2022 — Accepted ※ 09 August 2022 — Issue date ※ 11 September 2022 |
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| WEPA02 |
Beam Dynamics Studies on a Low Emittance Injector for LCLS-II-HE |
619 |
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- F. Ji, C. Adolphsen, R. Coy, L. Ge, C.E. Mayes, T.O. Raubenheimer, L. Xiao
SLAC, Menlo Park, California, USA
- J. Qiang
LBNL, Berkeley, California, USA
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The SLAC High Energy upgrade of LCLS-II (LCLS-II-HE) will double the beam energy to 8 GeV, increasing the XFEL photon energy reach to about 13 keV. The energy reach can be extended to 20 keV if the beam emittance can be halved, which requires a higher gradient electron gun with a lower intrinsic emittance photocathode. To this end, the Low Emittance Injector (LEI) will be built that will run parallel to the existing LCLS-II Injector. The LEI design will be based on a state-of-the-art SRF gun with a 30 MV/m cathode gradient. The main goal is to produce transverse beam emittances of 0.1 mm-mrad for 100 pC bunch charges. This paper describes the beam dynamics studies on the design of the LEI including the simulations and multi-objective genetic algorithm (MOGA) optimizations. Performance with different injector layouts, cathode gradients, bunch charges and cathode mean transverse energies (MTEs) will be presented.
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-NAPAC2022-WEPA02
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| About • |
Received ※ 02 August 2022 — Revised ※ 11 August 2022 — Accepted ※ 12 August 2022 — Issue date ※ 17 August 2022 |
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| THYE3 |
Superconducting Undulators and Cryomodules for X-ray Free-Electron Lasers |
870 |
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- D.C. Nguyen, G.J. Bouchard, B.M. Dunham, G.L. Gassner, Z. Huang, E.M. Kraft, P. Krejcik, M.A. Montironi, H.-D. Nuhn, T.O. Raubenheimer, Z.R. Wolf, Z. Zhang
SLAC, Menlo Park, California, USA
- J.M. Byrd, J.D. Fuerst, E. Gluskin, Y. Ivanyushenkov, M. Kasa, E.R. Moog, M.F. Qian, Y. Shiroyanagi
ANL, Lemont, Illinois, USA
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Funding: Work supported by the US DOE Office of Science, Basic Energy Sciences, Office of Accelerator and Detector Research (Manager: Dr. Eliane Lessner).
We present connectable designs of superconducting undulators (SCU) and cryomodules (CM) based on previous SCU and CM designs at Argonne National Lab. The new SCU and CM designs will allow us to connect one CM to the next to form a contiguous line of SCUs with no breaks between the cryomodules. The SCU design will have correctors and phase shifters integrated into the main SCU magnet core, as well as external corrector magnets for trajectory corrections. There will also be a cryogenic magnetic quadrupole and a cold RF beam position monitor (BPM) integrated in the SCU CM. In addition to providing the usual FODO transverse focusing, the quadrupole and BPM will be used for the beam-based alignment technique that is critical for X-ray FEL operation. In this paper, we will present the conceptual design of the new SCU CM as well as results of FEL simulations using the SCUs as afterburners for the LCLS hard X-ray undulators.
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Slides THYE3 [2.657 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-NAPAC2022-THYE3
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| About • |
Received ※ 02 August 2022 — Revised ※ 07 August 2022 — Accepted ※ 08 August 2022 — Issue date ※ 16 August 2022 |
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