KfB-Verbundforschungsworkshop "Teilchen 2027-2030"
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Das Bundesministerium für Forschung, Technologie und Raumfahrt (BMFTR) erwägt eine Förderung im ErUM-Themengebiet "Teilchen" in 2027-2030.
Die damit verbundenen Chancen zu nutzen, ist wesentliches Ziel unseres KfB-Workshops zur Verbundforschung "Teilchen 2027-2030", zu dem wir alle Interessierten einladen.
Das Treffen soll die Gelegenheit zum gemeinsamen Austausch bieten und so bei der Formierung geeigneter Forschungsverbünde im Bereich der Querschnitttechnologie R&D Beschleuniger helfen.
Nach einer Einführung durch den Projektträger PT-DESY werden DESY, CERN und GSI Themen für die Kooperation mit Universitäten vorstellen. Im Mittelpunkt steht danach die Vorstellung und Diskussion universitärer Forschungsvorhaben.
Der zoom link, siehe unten auf dieser Webseite, wird während der Online-Veranstaltung aktiv geschaltet.
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The Federal Ministry of Research, Technology and Space (BMFTR) is considering funding for the ErUM thematic area "Particles" in 2027–2030.
Taking advantage of the opportunities this presents is a key objective of our KfB workshop on collaborative research, “Particles 2027–2030”, to which we invite all interested parties.
The meeting is intended to provide an opportunity for mutual exchange and thus assist in the formation of suitable research consortia in the field of cross-cutting technology R&D accelerators.
Following an introduction by the project sponsor PT-DESY, DESY, CERN and GSI will present topics for cooperation with universities. The focus will then be on the presentation and discussion of university research projects.
The Zoom link, available at the bottom of this webpage, will be activated during the online event.
Wichtige Informationen für Vortragende / Important information for speakers
URL shortcut: https://indico.global/e/kfb_ws_teilchen2027
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Agenda und Ablauf: Organisatorisches WorkshopConvener: Erik Bründermann
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PT.DESY --- Center interests by DESY, CERN, GSIConvener: Erik Bründermann
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CERNSpeaker: Frank Tecker (CERN)
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PT DESYSpeaker: Maren Meinhard (PT DESY)
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10:15
Q&A und Kaffeepause (Zeit für Gespräche)
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Kurzvorstellung der Projektvorschläge der Universitäten
Moderation: NN
Convener: Florian Hug (Johannes Gutenberg-Universität Mainz)-
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Projects in Proton-driven Plasma Wakefield Acceleration
Topics in proton-driven PWFA will be addressed. These include the commissioning and operation of a novel plasma source for the AWAKE experiment at CERN, simulation studies of an FFA-based proton-driver for bringing electron beams to the many 100 GeV and TeV region, and the development of an energy-correction scheme for accelerated bunches exiting the plasma.
Speaker: Allen Caldwell (Max-Planck-Institut fur Physik (DE)) -
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Coupling Beam Dynamics and Wakefields for CSR wakes
CSR
Speaker: Jonas Christ (TU Darmstadt, Institute for Accelerator Science and Electromagnetic Fields (TEMF)) -
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Studying systematic effects in storage rings for EDM measurements
Electric dipole moments of subatomic particles may be observed by detecting “irregular” spin-motion. Such measurements are always limited by the control of systematic effects. Since suitable storage rings for, e.g. protons, are presently not available, we suggest to use existing hardware at HIM Mainz to study such effects with spin-polarized electrons.
Speaker: Kurt Aulenbacher -
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Photoemission study of nanostructured plasmonic photocathodes
We develop a simulation framework for nanostructured photocathodes that combines electromagnetic modeling, spatially resolved photoemission with Schottky correction, and particle-in-cell beam dynamics.
Nanostructured metallic photocathodes offer enhanced quantum efficiency through surface-plasmon excitation that leads to increased absorptance. For plasmonic copper cathodes at UV, the results show increased quantum efficiency, but however, with a degradation of beam quality, including up to a 1.5-fold increase in normalized emittance and higher energy spread.
The approach is general and can be extended to other metallic materials. Semiconductor photocathodes are also considered as a possible extension.
Speaker: Margarita Bulgacheva (Technical University Darmstadt) -
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R&D for Future Circular Collider Applications with Stored Spin Polarized Electron Beams at ELSA
The University of Bonn operates a 3.2 GeV synchrotron capable of accelerating spin polarized electrons from a dedicated GaAs-source to external experimental stations. The facility's key capabilities include the mitigation of depolarizing resonances (tune jumps, harmonic correction) and polarimetry (stored and extracted beam). It offers unique opportunities for testing applications for future circular colliders, such as beam energy calibration schemes, spin preservation techniques and verification of simulation codes. In particular the development of a fast Compton polarimeter for enhanced precision in beam energy monitoring is of interest.
Speaker: Michael Switka (Universität Bonn, ELSA) -
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HTS-Magnettechnologie
Projektvorschlag des IBPT (KIT) zur nachhaltigen Fortführung der FuE Magnetstrukturen aus Hochtemperatursupraleitern.
Speaker: David Saez de Jauregui (KIT) -
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Additive Manufacturing (AM) for Efficient Particle Accelerators
Additive Manufacturing (AM) for Efficient Particle Accelerators
Speaker: Michael Mayerhofer (Universität der Bundeswehr München) -
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Ion Bunch Energy Acoustic Tracing (IBEAT)
As part of the ErUM-FSP APPA, this project will advance Ion-Bunch Energy Acoustic Tracing (I-BEAT) from qualitative single-shot monitoring towards quantitative ion-energy diagnostics in structured solid detector media. Building on previous work with water-based detectors and solid moderators, we have recently demonstrated that layered solid volumes, initially composed of aluminium and PEEK, generate acoustic signals with well-defined carrier frequencies. These frequencies correspond to the fundamental acoustic resonances of the individual layers and provide a robust signature of ion-induced energy deposition. This establishes the layered I-BEAT concept, termed TIMBRE, as a compact and vacuum-compatible diagnostic approach for laser-driven and conventionally accelerated ion bunches.
The next funding period will focus on solving the inverse reconstruction problem: deriving quantitative ion-energy distributions and deposited-dose profiles from the measured acoustic response of the layered detector. While qualitative dose monitoring has been demonstrated and the relevant material, acoustic and detector parameters are now well constrained, accurate reconstruction remains non-trivial. We will therefore develop a model-based machine-learning framework that combines physical forward modelling with data-driven inversion. The central benchmark will be the agreement between TIMBRE-reconstructed deposited dose and radiochromic-film stack measurements, aiming for quantitative consistency at the 10% level.
Speaker: Prof. Jörg Schreiber (University of Munich (LMU)) -
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Pulsed carrier-envelope-phase detection for beam stabilization
Terahertz (THz) frequencies (100 GHz – 10 THz, 414 µeV – 41 meV) are often part of synchrotron radiation, yet receive little attention for monitoring and control purposes. Previously, we investigated the capabilities of THz field effect transistors for beam positioning purposes of FELs and also spectrally characterized an FEL with a THz photonic spectrum analyzer at multiple THz. Here, we want to expand our monitoring capabilities to the detection of the carrier-envelope-phase (CEP) of pulsed radiation in the THz domain, a pre-requirement for CEP-stable operation. For the detection, the THz radiation is mixed with a pulsed laser in two photoconductive mixers. By inducing a slightly different time delay between the arrival times of the pulsed laser to two photoconductive mixers, the radiation is sampled at two points synchronously. Their amplitude difference gives information on the slope of the pulsed THz radiation at the selected measurement points and, therefore, on the phase. Its information may be used on a pulse-by-pulse base for active carrier-envelope-phase stabilization. Carrier-phase stability is important for applications using the THz field for excitation. If funded, DALI will be a CEP stable machine, amongst other accelerator facilities.
Speaker: Benedikt Krause (TU Darmstadt) -
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Additive Manufacturing of an Ionization Profile Monitor (IPM) Grid
Ionization profile monitors in accelerator beamlines rely on delicate wire grids with high optical transparency, but conventional wire fabrics are prone to shortcuts or sparkovers to nearby high-voltage components due to loose wires and can therefore cause malfunction. In the presented concept, additive manufacturing is explored as a route to produce more robust grid structures for IPMs, with current work focusing on alternative geometries such as honeycomb- or triangle-like patterns, which improves mechanical stability and reduced sagging. Thermal deformation during heating up to 300°C needs to be considered. The study also addresses lifetime extension toward maintenance-free operation and examines whether tailored surface properties of additively manufactured parts, including secondary electron yield, can improve performance. Beyond ionization profile monitors, the approach may open new options for other beam diagnostics such as profile grids and wire scanners.
Speaker: Stephan Klaproth (Technische Hochschule Mittelhessen) -
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Temporal electron beam measurements of a pulsed electron lens for space charge compensation
A pulsed electron lens is being developed at GSI for space charge compensation, but direct time-resolved diagnostics of the electron beam remain challenging because of the high beam power. Additionally, the electron beam will be modulated. The presented concept makes use of an additively manufactured fast Faraday cup for the temporal characterization of the electron beam. Due to geometric restrictions the geometric footprint shall be reduced by e.g., bending the coaxial design. Furthermore, operational capability through cooling of both the chassis and the inner conductor is aimed for. Another objective is to investigate whether the very rough surfaces typical of additive manufacturing can lower secondary electron yield and thereby help to mitigate an electron backflow. The work aims to establish a compact diagnostic concept for demanding pulsed low keV electron-beam environments.
Speaker: Stephan Klaproth (Technische Hochschule Mittelhessen) -
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Beam Dynamics for reaching best energy spread in ERLs
Reliable SRF-ERLs with high energies (multi-turn) and currents needed for future machines/colliders. JGU and TUDa will be running the only European ERL projects within the upcoming funding period giving a chance to run studies on efficient ERL operation.
Years of operating MAMI and S-DALINAC (conventional mode) show tremendous beam stability and energy spread using off crest acceleration and non-isochronous beam transport. In Multi-turn ERLs this concept needs more investigation adaptions.Speaker: Florian Hug (Johannes Gutenberg-Universität Mainz) -
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Longitudinal ERL Beam Dynamics for High Efficiency Injection
One limiting factor of ERL efficiency is the injection energy. But lower injection energy increases phase slippage effects. We are going to measure beam properties (e.g. bunch length, emittance) of injection beams at different energies (4, 6, 8 MeV) before main acceleration and investigate limits of transversal and longitudinal acceptance for twice recirculating ERL operation of S-DALINAC.
Speaker: Florian Hug (Johannes Gutenberg-Universität Mainz) -
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Fast Rective Tuner Developments for Sustainable Operation of SRF Systems
For low beam loading machines (like ERLs having virtually no beamloading) the required RF power is dominated by microphonics. Residual microphonics require over-coupled FPC and are cost extensive. Using faster tuners would allow to couple more critically and increase the efficiency of the RF operation.
Speaker: Florian Hug (Johannes Gutenberg-Universität Mainz) -
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Co-sputtering optimization for QPR tests - Nb3Sn at ATFT
Based on previous results (coating of small substrates and HOM antennae) low temperature co-sputtering of Nb3Sn of Cu QPR cups will be optimised and compared to other coating methods. Part of the planned Phoenix collaboration, project partners: HZB, UHH, TU Chemnitz, Uni Wuppertal.
Speaker: Márton Major (Technical University of Darmstadt) -
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Polarization & spin tracking in plasma accelerators
Generation of polarized electron sources via LPA
Experimental test of spin behaviour of polarized sources in plasma environment, e.g. transfer through plasma lens
Depolarization analyses and Spin management
Further code development for spin tracking in HEP including plasmasSpeaker: gudrid moortgat-pick -
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FEM-Based State Space Concatenation for Coupled RF Cavity Simulation
The electromagnetic simulation of large accelerator structures, such as RF cavity chains, is computationally demanding due to the high number of degrees of freedom required by the finite element methods (FEM). This work presents a framework that combines Model-Order Reduction (MOR) with state-space concatenation (SSC) within the NGSolve finite element environment. Individual cavity segments are discretised using high-order FEM, reduced to compact state-space models, and coupled through continuity conditions at shared interfaces to construct larger accelerator assemblies at significantly lower computational cost. A 2-cavity elliptical cavity chain is used as a test example to demonstrate reductions of several orders of magnitude in system size while maintaining excellent agreement with reference simulations from CST Studio Suite.
Speaker: Sosoho-Abasi Udongwo (Brandenburgische Technische Universität Cottbus-Senftenberg) -
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Optimization and modeling of a Fast Reactive Tuner for 1.3 GHz TESLA cavities at MESA
We propose a multiscale modeling and optimization framework for Fast Reactive Tuners (FRTs) for 1.3,GHz TESLA cavities at MESA, combining fine thermal-mechanical simulations with reduced-order lumped circuit models. The project will investigate stochastic PDE/ODE formulations and polynomial chaos expansions to account for manufacturing imperfections, while employing coarse/fine model space mapping techniques to accelerate optimization toward mitigating microphonics-induced detuning.
Speaker: Prof. Simon Adrian -
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Multiscale numerical modeling of superconducting RF cavities
We aim to develop a multiscale boundary-element framework for the numerical modeling of superconducting RF cavities with micrometer-scale surface roughness, motivated in particular by Nb3Sn-coated cavity technologies. Building on our current 2D multiscale PEC formulation, we plan to incorporate superconducting surface boundary conditions and collaborate on modeling magnetic flux trapping and its relation to surface roughness and RF losses.
Speaker: Simon Adrian
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12:15
Lunch
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Agenda und Ablauf: Organisation Gespräche und Breakout-RoomsConvener: Danyal Winters
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Besprechungen in KleingruppenConvener: Danyal Winters
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Agenda und Ablauf: Zusammenführung GruppenConvener: Danyal Winters
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Vorstellung der Verbünde, Q&A, Abschlussdiskussion
Verbünde stellen sich vor inkl. Diskussion.
Zeitslot für Vortrag über jeden Verbund ca. 5 min. Verbünde erstellen ca. 2-3 Folien.
Schlussfolie jeweils mit geplanten Partnern, FTEs, Investitionen.
Vortragende: Berichterstatter:innen zu Beginn in den zoom-Unter- und Diskussionsräumen gewählt.Verbünde (Arbeitstitel/titles to be decided)
Conveners: Danyal Winters, Erik Bründermann
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