Contributions to a conference proceedings

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2024-05-27
17:12
[PUBDB-2024-01896] Contribution to a conference proceedings/Contribution to a book
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Slice energy spread measurements of a 20 MeV electron beam at PITZ
The 15th International Particle Accelerator Conference, IPAC24, NashvilleNashville, USA, 19 May 2024 - 24 May 20242024-05-192024-05-24 2195-2198 () [10.18429/JACoW-IPAC2024-WEPG22]  GO
Due to improvements of the performance of FELs, the measurements of the beam’s slice energy spread is becoming increasingly important for optimization of the brightness. Of particular interest are measurements of the uncorrelated energy spread near the gun as this determines the lower limit of the energy spread for the rest of the machine. [...]
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2024-05-24
10:08
[PUBDB-2024-01860] Contribution to a conference proceedings
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FLASHlab@PITZ beamline upgrade towards full functionality – status and plans
15th International Particle Accelerator Conference, IPAC’24, NashvilleNashville, USA, 19 May 2024 - 24 May 20242024-05-192024-05-24 4 pp. () [10.18429/JACoW-IPAC2024-THPR48]  GO
At the Photo Injector Test facility at DESY in Zeuthen (PITZ), an R&D platform for electron FLASH cancer radi-ation therapy and radiation biology is being prepared: FLASHlablab@PITZ. The design of the full beamline with optimized beam properties was finished. [...]
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2024-05-15
11:34
[PUBDB-2024-01764] Contribution to a conference proceedings/Contribution to a book
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Multicycle Terahertz Generation Using High-Energy Pulse Trains
2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, CLEO/Europe-EQEC, MunichMunich, Germany, 26 Jun 2023 - 30 Jun 20232023-06-262023-06-30
IEEE 1 pp. () [10.1109/CLEO/EUROPE-EQEC57999]  GO
Frequency conversion in nonlinear crystals is a well-established method to provide narrowband, multicycle terahertz (THz) radiation for applications requiring high spectral purity like spectroscopy and electron acceleration [1], [2]. While significant progress has been made by using laser systems that produce pairs of narrow spectral lines separated by the THz frequency, optical-to- THz conversion efficiencies still remain below one percent [3], [4]. [...]
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2024-05-15
11:22
[PUBDB-2024-01761] Contribution to a conference proceedings/Contribution to a book
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Optimization of Multicycle THz generation using versatile optical pulse trains
[Ebook] IRMMW-THz 2023 : 48th International Conference on Infrared, Millimeter and Terahertz Waves : 17-22 September 2023, Montreal, Quebec, Canada / Cooke, David G. , [Piscataway, NJ] : IEEE, 2023,
48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, MontrealMontreal, Canada, 17 Sep 2023 - 22 Sep 20232023-09-172023-09-22
Piscataway, NJ : IEEE 2 pp. () [10.1109/IRMMW-THz57677.2023.10299242]  GO
Low efficiencies for narrowband optical-to-terahertz down-conversion remain a primary limiting factor for many applications of intense, laser-driven terahertz (THz) sources, highly sought after in material science and THz acceleration. Although simulations predict improvements in efficiency by using tailored trains of laser pulses as a driver, few studies have targeted this configuration. [...]
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2024-05-15
11:19
[PUBDB-2024-01760] Contribution to a conference proceedings/Contribution to a book
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Two-dimensional effects in Multicycle THz generation with tunable pump pulse trains in lithium niobate
[Ebook] IRMMW-THz 2023 : 48th International Conference on Infrared, Millimeter and Terahertz Waves : 17-22 September 2023, Montreal, Quebec, Canada / Cooke, David G. , [Piscataway, NJ] : IEEE, 2023,
48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, MontrealMontreal, Canada, 17 Sep 2023 - 22 Sep 20232023-09-172023-09-22
[Piscataway, NJ] : IEEE 2 pp. () [10.1109/IRMMW-THz57677.2023.10298999]  GO
A main limitation for many applications of laser-driven sources of narrowband terahertz (THz) radiation in spectroscopy and particle acceleration is the low optical-to-THz conversion efficiency. Due to power limitations, it is often necessary to use small sizes of the optical pump beam in the range of the THz wavelength to achieve sufficient intensity to effectively drive the nonlinear process. [...]
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2024-05-14
19:36
[PUBDB-2024-01754] Journal Article/Contribution to a conference proceedings/Contribution to a book
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Parameter dependencies in multicycle THz generation with tunable high-energy pulse trains in large-aperture crystals
Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII
SPIE Photonics West LASE, San FranciscoSan Francisco, United States, 29 Jan 2024 - 31 Jan 20242024-01-292024-01-31
Proceedings of SPIE 12869, 128690M () [10.1117/12.3003195]  GO
Efficiencies of nonlinear optical-to-terahertz (THz) conversion below one percent remain a limiting factor for applications of multicycle THz radiation like THz-driven acceleration and inspired the use of multi-line pump spectra. To overcome the difficulty of phase stabilization of multiple narrowband sources required by the multi-line approach, we exploit its temporal analog, i.e., regular pulse trains with THz repetition rate, in which the THz waves generated by rectifying the individual pulses add coherently. [...]
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2024-05-14
11:18
[PUBDB-2024-01724] Contribution to a conference proceedings
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Towards Unlocking Insights from Logbooks Using AI
15TH INTERNATIONAL PARTICLE ACCELERATOR CONFERENCE, NashvilleNashville, USA, 19 May 2024 - 24 May 20242024-05-192024-05-24 0-4 ()  GO
Electronic logbooks contain valuable information about activities and events concerning their associated particle accelerator facilities. However, the highly technical nature of logbook entries can hinder their usability and automation. [...]
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2024-05-14
11:10
[PUBDB-2024-01722] Contribution to a conference proceedings
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Automated Anomaly Detection on European XFEL Klystrons
15TH INTERNATIONAL PARTICLE ACCELERATOR CONFERENCE, NashvilleNashville, USA, 19 May 2024 - 24 May 20242024-05-192024-05-24 0-4 ()  GO
High-power multi-beam klystrons represent a key component to amplify RF to generate the accelerating field of the superconducting radio frequency (SRF) cavities at European XFEL. Exchanging these high-power components takes time and effort, thus it is necessary to minimize maintenance and downtime and at the same time maximize the device's operation. [...]
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2024-03-20
11:00
OpenAccess [PUBDB-2024-01238] Journal Article/Contribution to a conference proceedings
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Precision Top Mass Measurement Using Energy Correlators
[DESY-23-189; arXiv:2311.14389]
2023 European Physical Society Conference on High Energy Physics, EPS-HEP2023, HamburgHamburg, Germany, 21 Aug 2023 - 25 Aug 20232023-08-212023-08-25 Proceedings of Science / International School for Advanced Studies (EPS-HEP2023), 312 () [10.22323/1.449.0312]  GO
Precision top mass measurements at hadron colliders have been notoriously difficult. The fundamental challenge in the current approaches lies in achieving simultaneously high top mass sensitivity and good theoretical control. [...]
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2024-03-13
14:25
OpenAccess [PUBDB-2024-01182] Contribution to a conference proceedings/Journal Article
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Feebly-interacting particles: FIPs 2022 Workshop Report
[CERN-TH-2023-061; DESY-23-050; FERMILAB-PUB-23-149-PPD; INFN-23-14-LNF; JLAB-PHY-23-3789; LA-UR-23-21432; MITP-23-015; arXiv:2305.01715]
Workshop on Feebly-Interacting Particles, FIPs 2022, CERNCERN, Switzerland, 17 Oct 2022 - 21 Oct 20222022-10-172022-10-21 The European physical journal / C 83(12), 1122 () [10.1140/epjc/s10052-023-12168-5]  GO
Particle physics today faces the challenge of explaining the mystery of dark matter, the origin of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent fine-tuning of the electro-weak scale, and many other aspects of fundamental physics. Perhaps the most striking frontier to emerge in the search for answers involves new physics at mass scales comparable to familiar matter, below the GeV-scale, or even radically below, down to sub-eV scales, and with very feeble interaction strength. [...]
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