2024-03-18 14:54 |
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2024-03-12 14:39 |
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2024-03-12 14:35 |
[PUBDB-2024-01171]
Poster
Scham, M. ; Krücker, D. ; Borras, K. ; et al
Fast Generation of High Dimensional Point Clouds
20246th Inter-experiment Machine Learning Workshop, IML2024, CERN, GenevaCERN, Geneva, Switzerland, 29 Jan 2024 - 2 Feb 20242024-01-292024-02-02
In High Energy Physics, detailed and time-consuming simulations are used for particle interactions with detectors. To bypass these simulations with a generative model, the generation of large point clouds in a short time is required, while the complex dependencies between the particles must be correctly modelled [...]
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2024-02-13 15:26 |
[PUBDB-2024-00756]
Poster
Komm, M.
Search for long-lived heavy neutral leptons using a displaced jet tagger
20246th Inter-experiment Machine Learning Workshop, IML2024, CERN, GenevaCERN, Geneva, Switzerland, 29 Jan 2024 - 2 Feb 20242024-01-292024-02-02
A search for long-lived heavy neutral leptons (HNLs) is presented, which considers the hadronic final state and coupling scenarios involving all three lepton generations in the 2-20 GeV HNL mass range for the first time. A central feature of the analysis is a novel jet tagger, based on a deep neural network (DNN), that has been developed to identify displaced jets from an HNL decay using various features of the jet and its constituent particles without explicitly requiring the reconstruction of displaced vertices. [...]
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2024-01-17 13:37 |
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2023-12-28 14:22 |
[PUBDB-2023-08157]
Poster
Aftab, N. ; Krasilnikov, M. ; Hillert, W. ; et al
Improvements in Longitudinal Phase Space Tomography at PITZ
202314th International Particle Accelerator Conference, IPAC23, VeniceVenice, Italy, 7 May 2023 - 12 May 20232023-05-072023-05-12
Methodical studies to improve the existing e-beam LongitudinalPhase Space (LPS) tomography were performed at the PhotoInjector Test facility at DESY in Zeuthen. Proof of principlesimulations were done to address some core concerns e.g. [...]
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2023-12-28 14:17 |
[PUBDB-2023-08155]
Poster
Aftab, N. ; Krasilnikov, M. ; Hillert, W.
4D Transverse Phase Space Characterization of High Brightness Electron Beams at PITZ
202314th International Particle Accelerator Conference, IPAC23, VeniceVenice, Italy, 7 May 2023 - 12 May 20232023-05-072023-05-12
The Photo Injector Test facility at DESY in Zeuthen (PITZ)utilizes slit scan technique as a standard tool for reconstructionof horizontal and vertical phase spaces of its space chargedominated electron beams. A novel method for 4-dimensionaltransverse phase space characterization, known as VirtualPepper Pot, is proposed at PITZ, that can give insight totransverse beam phase space coupling. [...]
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2023-12-28 14:12 |
[PUBDB-2023-08154]
Poster
Aftab, N. ; Krasilnikov, M. ; Hillert, W. ; et al
Improvements in Longitudinal Phase Space Tomography at PITZ
202311th MT ARD ST3 Meeting, Helmholtz-Zentrum Dresden-RossendorfDresden, Helmholtz-Zentrum Dresden-Rossendorf, Germany, 5 Jul 2023 - 7 Jul 20232023-07-052023-07-07
At the Photo Injector Test facility at DESY in Zeuthen, LongitudinalPhase Space (LPS) tomography is done to reconstruct the LPS beforethe booster. In order to improve the existing technique, methodicalstudies were done where some core concerns were addressed e.g.booster phase scan range, momentum resolution and space-chargeeffects. [...]
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2023-12-25 18:54 |
[PUBDB-2023-08143]
Poster
Kubullek, M. ; Silva Toledo, M. A. ; Scheiba, F. ; et al
The parametric optical waveform synthesizer as a platformfor future attosecond-pump attosecond-probe experiments
20234th AttoChem Annual Meeting, AttoChem2023, SzegedSzeged, Hungary, 18 Sep 2023 - 20 Sep 20232023-09-182023-09-20
Optical waveform synthesis allows for generating optical transients withdurations down to the sub-cycle timescale allowing for strong field pumping tobe confined to only one event per pulse.We present our parametric waveform synthesizer, capable of producing waveformswith durations down to 3 fs and a spectrum from 690 nm to 2200 nm, aswell as our in-situ detection method to determine their full electric field.The synthesis of the waveforms is achieved by coherently combining two fewcyclepulses produced in parallel channels based on optical parametric amplifiers.Active stabilization of the system offers us great control and long-term stabilityof the waveforms.Using these waveforms, we could show the direct generation of isolatedattosecond pulses (IAPs) with variable duration, central energy, and bandwidthreaching up to ∼400 eV.Many strong field processes studied in attosecond science are highly fieldsensitive. Therefore, knowing the precise electric fields of the waveforms used togenerate the IAPs and pump the system under investigation is paramount.We will present our pulse characterization technique based on the observationof the perturbative nonlinear response in gas. [...]
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2023-12-22 14:54 |
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