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Design and Manufacturing of an HTS Helical Undulator Demonstrator for Compact FELs
/ Richter, S C (CERN ; KIT, Karlsruhe) ; Ballarino, A (CERN) ; Bernhard, A (KIT, Karlsruhe) ; Müller, A S (KIT, Karlsruhe)
Among all superconducting undulator geometries, a helical undulator provides a very compact geometry and further is more effective in producing synchrotron radiation, providing circularly polarized photons, which are widely usable for synchrotron radiation users. These characteristics make it a very attractive option for realizing more compact free-electron lasers, requiring a combination of short-period and high-field undulators to produce coherent light up to X-rays. [...]
2024 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4101507
Fulltext: PDF;
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Progress on HTS Undulator Prototype Coils for Compact FEL Designs
/ Richter, S C (CERN ; KIT, Karlsruhe) ; Ballarino, A (CERN) ; Schoerling, D (CERN) ; Nes, T H (CERN) ; Bernhard, A (KIT, Karlsruhe, IKP) ; Müller, A S (KIT, Karlsruhe)
Compact free-electron lasers require short accelerator structures followed by high peak field and short-period undulators to produce coherent radiation up to hard X-rays. Likewise, future lepton colliders, like CLIC or FCC-ee, require high-field damping wigglers for the creation of low emittance beams. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4100305
In : 15th European Conference on Applied Superconductivity (EUCAS 2021), Online, 5 - 9 Sep 2021, pp.4100305
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High-Temperature Superconducting Undulator Prototype Coils for Compact Free-Electron Lasers
/ Richter, S C (CERN ; KIT, Karlsruhe) ; Ballarino, A (CERN) ; Bernhard, A (KIT, Karlsruhe) ; Grau, A W (KIT, Karlsruhe) ; de Jauregui, D Saez (KIT, Karlsruhe) ; Müller, A S (KIT, Karlsruhe)
Short-period and high-field undulators are crucial for the production of coherent light up to X-rays in compact free-electron lasers (FELs). Besides, future colliders like CLIC or FCC-ee demand high-field damping wigglers to reach a low beam emittance. [...]
2023 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4100207
In : Applied Superconductivity Conference, Honolulu, Hawaii, United States, 23 - 28 Oct 2022
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FOCUS: Fast Monte-CarlO Approach to Coherence of Undulator Sources
/ Siano, Mirko (U. Milan (main)) ; Butti, Daniele (CERN) ; Geloni, Gianluca (European XFEL, Hamburg) ; Iriso, Ubaldo (CELLS - ALBA, LLS) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) ; Nosych, Andriy (CELLS - ALBA, LLS) ; Paroli, Bruno (U. Milan (main)) ; Potenza, Marco (U. Milan (main)) ; Torino, Laura (CELLS - ALBA, LLS) et al.
We present Fast Monte-CarlO approach to Coherence of Undulator Sources (FOCUS), a new GPU-based code to compute the transverse coherence of X-ray radiation from undulator sources. The code relies on scaled dimension- less quantities and analytic expressions of the electric field emitted by electrons in an undulator. [...]
2022 - 4 p.
- Published in : JACoW IBIC 2022 (2022) 257-260
Fulltext: PDF;
In : 11th International Beam Instrumentation Conference (IBIC 2022), Cracow, Poland, 11 - 15 Sep 2022, pp.257-260
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The upgraded quench protection system for main quadrupoles in the LHC
/ Skoczeń, Andrzej (AGH-UST, Cracow) ; Steckert, Jens (CERN) ; Spasic, Jelena (CERN) ; Blasco Serrano, Daniel (CERN) ; Mundra, Surbhi (CERN) ; Pridii, Tetiana (CERN)
The protection of superconducting magnets is a very important issue and demanding challenge in the LHC and other superconducting accelerating facilities. The quench phenomenon can destroy components of the accelerator, and therefore this digital system was designed, implemented, tested, and installed near each superconducting magnet in the LHC tunnel. [...]
2023 - 23 p.
- Published in : JINST 18 (2023) T01004
Fulltext: PDF;
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Magnetic Characterization of a Superconducting Transverse Gradient Undulator for Compact Laser Wakefield Accelerator-Driven FELs
/ Damminsek, Kantaphon (KIT, Karlsruhe, TTP) ; Bernhard, Axel (KIT, Karlsruhe, TTP) ; Cha, Hyuk Jin (KIT, Karlsruhe, TTP) ; Grau, Andreas (KIT, Karlsruhe) ; Müller, Anke-Susanne (KIT, Karlsruhe) ; Ning, Maisui (KIT, Karlsruhe) ; Richter, Sebastian (CERN) ; Rossmanith, Robert (DESY) ; Tong, Yimin (KIT, Karlsruhe)
A transverse gradient undulator (TGU) is a key component compensating for the relatively large energy spread of Laser Wakefield Accelerator (LWFA)-generated electron beams for realizing a compact Free Electron Laser (FEL). A superconducting TGU with 40 periods has been fabricated at the Karlsruhe Institute of Technology (KIT). [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1772-1775
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1772-1775
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Status and Powering Test Results of HTS Undulator Coils at 77 K for Compact FEL Designs
/ Richter, Sebastian (CERN ; KIT, Karlsruhe, EKP) ; Ballarino, Amalia (CERN) ; Bernhard, Axel (KIT, Karlsruhe, EKP) ; Müller, Anke-Susanne (KIT, Karlsruhe, EKP) ; Nes, Thomas (CERN) ; Schoerling, Daniel (CERN)
The production of low emittance positron beams for future linear and circular lepton colliders, like CLIC or FCC-ee, requires high-field damping wigglers. Just as compact free-electron lasers (FELs) require high-field but as well short-period undulators to emit high energetic, coherent photons. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2726-2729
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2726-2729
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A Start-to-End Optimisation Strategy for the CompactLight Accelerator Beamline
/ Zhao, Yongke (CERN) ; Aksoy, Avni (Ankara U. ; CERN) ; Castañeda Cortés, Hector Mauricio (Cockcroft Inst. Accel. Sci. Tech.) ; Dunning, David (Cockcroft Inst. Accel. Sci. Tech.) ; Latina, Andrea (CERN) ; Thompson, Neil (Cockcroft Inst. Accel. Sci. Tech.)
The CompactLight collaboration designed a compact and cost-effective hard X-ray FEL facility, complemented by a soft X-ray option, based on X-band acceleration, capable of operating at 1 kHz pulse repetition rate. In this paper, we present a new simple start-to-end optimisation strategy that is developed for the CompactLight accelerator beamline, focusing on the hard X-ray mode. [...]
2022 - 4 p.
- Published in : JACoW LINAC 2022 (2022) 573-576
Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.573-576
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Undulators and Light Production with the XLS-CompactLight Design Study
/ Nguyen, F (ENEA, Frascati) ; Carpanese, M (ENEA, Frascati) ; Petralia, A (ENEA, Frascati) ; Bernhard, A (KIT, Karlsruhe) ; Arnsberg, J (KIT, Karlsruhe) ; Fatehi, S (KIT, Karlsruhe) ; Gethmann, J (KIT, Karlsruhe) ; Grohmann, S (KIT, Karlsruhe) ; Krasch, B (KIT, Karlsruhe) ; Schmidt, T (PSI, Villigen) et al.
Free electron laser (FEL) facilities provide broadly tunable and highly coherent photon beams. These machines still have an unexplored potential and development. [...]
2022 - 4 p.
- Published in : Moscow Univ. Phys. Bull.: 77 (2022) , no. 2, pp. 241-244
In : 20th Lomonosov Conference on Elementary Particle Physics, Moscow, Ru, 19 - 25 Aug 2021, pp.241-244
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