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Hot electron enhanced photoemission from laser fabricated plasmonic photocathodes
/ Martinez-Calderon, Miguel (CERN) ; Groussin, Baptiste (CERN) ; Bjelland, Victoria (CERN ; Norwegian U. Sci. Tech.) ; Chevallay, Eric (CERN) ; Fedosseev, Valentin N (CERN) ; Himmerlich, Marcel (CERN) ; Lorenz, Pierre ; Manjavacas, Alejandro ; Marsh, Bruce A (CERN) ; Neupert, Holger (CERN) et al.
Photocathodes are key elements in high-brightness electron sources and ubiquitous in the operation of large-scale accelerators, although their operation is often limited by their quantum efficiency and lifetime. Here, we propose to overcome these limitations by utilizing direct-laser nanostructuring techniques on copper substrates, improving their efficiency and robustness for next-generation electron photoinjectors. [...]
2023 - 9 p.
- Published in : 10.1515/nanoph-2023-0552
Fulltext: PDF;
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First on-line application of the high-resolution spectroscopy laser ion source PI-LIST at ISOLDE
/ Heinke, Reinhard (CERN) ; Au, Mia (CERN ; Mainz U.) ; Bernerd, Cyril (CERN ; Leuven U.) ; Chrysalidis, Katerina (CERN) ; Cocolios, Thomas E (Leuven U.) ; Fedosseev, Valentin N (CERN) ; Hendriks, Isabel (CERN ; Lund U. (main)) ; Jaradat, Asar A H (CERN) ; Kaja, Magdalena (Mainz U., Inst. Phys.) ; Kieck, Tom (Darmstadt, GSI ; Helmholtz Inst., Mainz) et al.
We report on the development, characterization, and first application of a specialized resonance ionization laser ion source for high-resolution spectroscopy applications below usual hot cavity Doppler broadening limitations, for on-line experiments at CERN-ISOLDE. The new PI-LIST ion source comprises perpendicular laser/atom beam interaction in a radio-frequency quadrupole unit directly downstream the hot atomizer cavity. [...]
2023 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 541 (2023) 8-12
Fulltext: PDF;
In : 19th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS 2022), Daejeon, Korea, 3 - 7 Oct 2022, pp.8-12
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4.
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A cold electron-impact ion source driven by a photo-cathode – New opportunities for the delivery of radioactive molecular beams?
/ Ballof, Jochen (CERN ; Mainz U.) ; Au, Mia (CERN ; Mainz U.) ; Barbero, Ermanno (CERN) ; Chrysalidis, Katerina (CERN) ; Düllmann, Christoph E. (Mainz U. ; Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Fedosseev, Valentin (CERN) ; Granados, Eduardo (CERN) ; Heinke, Reinhard (CERN) ; Marsh, Bruce A. (CERN) ; Owen, Michael (CERN) et al.
The thick-target ISOL (Isotope mass Separation OnLine) method provides beams of more than 1000 radionuclides of 74 elements. The method is well established for elements with sufficiently high volatility at ca. [...]
arXiv:2110.00651.-
2022 - 8 p.
- Published in : J. Phys. : Conf. Ser. 2244 (2022) 012072
Fulltext: document - PDF; 2110.00651 - PDF;
In : 19th International Conference on Ion Sources (ICIS 2021), Vancouver, BC, Canada, 20 - 24 Sep 2021, pp.012072
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The AWAKE Run 2 programme and beyond
/ AWAKE Collaboration
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. Use of high energy protons to drive wakefields in plasma has been demonstrated during Run 1 of the AWAKE programme at CERN. [...]
arXiv:2206.06040.-
2022-08-12 - 21 p.
- Published in : Symmetry 14 (2022) 1680
Fulltext: document - PDF; 2206.06040 - PDF;
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7.
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Spectral synthesis of multimode lasers to the Fourier limit in integrated Fabry–Perot diamond resonators
/ Granados, Eduardo (CERN) ; Granados, Camilo ; Ahmed, Rizwan (CERN) ; Chrysalidis, Katerina (CERN) ; Fedosseev, Valentin N (CERN) ; Marsh, Bruce A (CERN) ; Wilkins, Shane G (CERN) ; Mildren, Richard P (Macquarie U.) ; Spence, David J (Macquarie U.)
Fourier-limited nanosecond pulses featuring narrow spectral bandwidths are required for applications in spectroscopy,
sensing, and quantum optics. Here, we demonstrate a direct and simple route for the generation of single-frequency light
relying on phonon-resonant Raman interactions within a monolithic diamond resonator. [...]
2022 - 8 p.
- Published in : Optica 9 (2022) 317-324
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8.
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Enabling the use of Raman lasers for spectroscopy: continuous tunability, narrow linewidth and efficient cascading in diamond
/ Echarri, Daniel T (CERN ; Navarra U.) ; Chrysalidis, Katerina (CERN) ; Fedosseev, Valentin N (CERN) ; Marsh, Bruce A (CERN) ; Mildren, Richard P (Macquarie U.) ; Olaizola, Santiago M (Navarra U.) ; Spence, David J (Macquarie U.) ; Wilkins, Shane G (CERN) ; Granados, Eduardo (CERN)
We demonstrate a Raman laser continuously tunable in the visible range, capable of performing element-selective photo-ionization. The Stokes outputs exhibited a linewidth of 11.0 ± 1.0 GHz with a conversion efficiency of more than 60%..
2020
- Published in : (2020) , pp. C6A_3
In : 14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020), Sydney, Austrialia, 3 - 5 Aug 2020, pp.C6A_3
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9.
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Efficient Production of High Specific Activity Thulium-167 at Paul Scherrer Institute and CERN-MEDICIS
/ Heinke, Reinhard (CERN ; Leuven U.) ; Chevallay, Eric (CERN) ; Chrysalidis, Katerina (CERN) ; Cocolios, Thomas E (Leuven U.) ; Duchemin, Charlotte (Leuven U. ; CERN) ; Fedosseev, Valentin N (CERN) ; Hurier, Sophie (Leuven U. ; SCK-CEN, Mol) ; Lambert, Laura (CERN) ; Leenders, Benji (Leuven U. ; SCK-CEN, Mol ; Gent U.) ; Marsh, Bruce A (CERN) et al.
Thulium-167 is a promising radionuclide for nuclear medicine applications with potential use for both diagnosis and therapy (“theragnostics”) in disseminated tumor cells and small metastases, due to suitable gamma-line as well as conversion/Auger electron energies. However, adequate delivery methods are yet to be developed and accompanying radiobiological effects to be investigated, demanding the availability of $^{167}$Tm in appropriate activities and quality. [...]
2021
- Published in : Frontiers in Medicine 8 (2021) 712374
Fulltext: PDF;
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CERN-MEDICIS: A Review Since Commissioning in 2017
/ MEDICIS Collaboration
The CERN-MEDICIS (MEDical Isotopes Collected from ISolde) facility has delivered its first radioactive ion beam at CERN (Switzerland) in December 2017 to support the research and development in nuclear medicine using non-conventional radionuclides. Since then, fourteen institutes, including CERN, have joined the collaboration to drive the scientific program of this unique installation and evaluate the needs of the community to improve the research in imaging, diagnostics, radiation therapy and personalized medicine. [...]
2021 - 11 p.
- Published in : Frontiers in Medicine 8 (2021) 693682
Fulltext: PDF;
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