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Version control and DevOps for accelerator and experiments: Experience and outlook
/ Trobo, Ismael P (CERN) ; Evangelou, Konstantinos (CERN) ; Lossent, Alexandre (CERN) ; Wagner, Andreas (CERN)
GitLab has been in operation at CERN since 2012. It is a selfservice code hosting application based on Git that provides collaboration and code review features, becoming one of the key infrastructures at CERN. [...]
2024 - 10 p.
- Published in : EPJ Web Conf. 295 (2024) 05024
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.05024
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Building a user-oriented notification system at CERN
/ Antunes, Carina (CERN) ; Semedo, Jose (CERN) ; Wagner, Andreas (CERN) ; Ormancey, Emmanuel (CERN) ; Carpente, Caetan (CERN) ; Jakovljevic, Igor (CERN)
CERN, as many large organizations, heavily relies on a variety of communication means for different use-cases and teams. The large amount of notifications received every day leads to adverse consequences. [...]
2024 - 9 p.
- Published in : EPJ Web Conf. 295 (2024) 05002
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.05002
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3.
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Large scale dynamic web deployment for CERN, experience and outlook
/ Reddy, Rajula Vineet (CERN) ; Yde, Joachim Valdemar (CERN) ; Barros, Francisco Borges Aurindo (CERN) ; Antunes, Carina (CERN) ; Wagner, Andreas (CERN)
CERN hosts more than 1200 websites essential for the mission of the Organization, both for internal and external collaboration and communication, as well as public outreach. The complexity and scale of CERN’s online presence is very diverse with some websites, like home.cern, accommodating more than one million unique visitors in a day. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 05011
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.05011
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4.
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Beam-based commissioning of a novel X-band transverse deflection structure with variable polarization
/ González Caminal, P (DESY) ; Christie, F (DESY) ; D'Arcy, R (DESY) ; Jaster-Merz, S M (DESY) ; Assmann, R (DESY) ; Burkart, F (DESY) ; Conrad, B (DESY) ; Dinter, H (DESY) ; Foese, M (DESY) ; Herrmann, J (DESY) et al.
Longitudinal electron-beam diagnostics play a critical role in the operation and control of x-ray free-electron lasers, which rely on parameters such as the current profile, the longitudinal phase space, or the slice emittance of the particle distribution. On the one hand, the femtosecond-scale electron bunches produced at these facilities impose stringent requirements on the resolution achievable with the diagnostics. [...]
2024 - 19 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 032801
Fulltext: PDF;
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5.
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Impact and development of an Open Web Index for open web search
/ Granitzer, Michael (Pisa U.) ; Voigt, Stefan (Darmstadt, GSI ; DLR, Koln) ; Fathima, Noor Afshan (CERN) ; Golasowski, Martin (Ostrava, Tech. U.) ; Guetl, Christian (Graz, Tech. U.) ; Hecking, Tobias (DLR, Koln) ; Hendriksen, Gijs (Nijmegen U.) ; Hiemstra, Djoerd (Nijmegen U.) ; Martinovič, Jan (Ostrava, Tech. U.) ; Mitrovic, Jelena (Pisa U.) et al.
Web search is a crucial technology for the digital economy. Dominated by afew gatekeepers focused on commercial success, however, web publishers haveto optimize their content for these gatekeepers, resulting in a closed ecosystemof search engines as well as the risk of publishers sacrificing quality. [...]
2023 - 9 p.
- Published in : 10.1002/asi.24818
Fulltext: PDF;
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An intercomparison study of four different techniques for measuring the chemical composition of nanoparticles
/ Caudillo, Lucía (Frankfurt U., FIAS ; Frankfurt U.) ; Surdu, Mihnea (PSI, Villigen) ; Lopez, Brandon (Carnegie Mellon U.) ; Wang, Mingyi (Carnegie Mellon U. ; Caltech) ; Thoma, Markus (Frankfurt U., FIAS ; Frankfurt U.) ; Bräkling, Steffen (LLNL, Livermore) ; Buchholz, Angela (Aalto U.) ; Simon, Mario (Frankfurt U., FIAS ; Frankfurt U.) ; Wagner, Andrea C (Frankfurt U., FIAS ; Frankfurt U.) ; Müller, Tatjana (Frankfurt U., FIAS ; Frankfurt U. ; Mainz, Max Planck Inst.) et al.
Currently, the complete chemical characterization of nanoparticles
(< 100 nm) represents an analytical challenge, since these particles
are abundant in number but have negligible mass. Several methods for
particle-phase characterization have been recently developed to better
detect and infer more accurately the sources and fates of sub-100 nm
particles, but a detailed comparison of different approaches is missing.
Here we report on the chemical composition of secondary organic aerosol
(SOA) nanoparticles from experimental studies of α-pinene ozonolysis
at −50, −30, and −10 ∘C and intercompare the results measured by different
techniques. [...]
2023 - 19 p.
- Published in : Atmos. Chem. Phys. 23 (2023) 6613-6631
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Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere
/ He, Xu-Cheng (Helsinki U. ; Carnegie Mellon U. ; Helsinki Inst. of Phys.) ; Simon, Mario (Frankfurt U., FIAS ; Frankfurt U.) ; Iyer, Siddharth (Tampere U. of Tech.) ; Xie, Hong-Bin (Shanghai Jiao Tong U.) ; Rörup, Birte (Helsinki U.) ; Shen, Jiali (Helsinki U.) ; Finkenzeller, Henning (Colorado U. ; Colorado U., CIRES) ; Stolzenburg, Dominik (Helsinki U. ; Vienna U.) ; Zhang, Rongjie (Shanghai Jiao Tong U.) ; Baccarini, Andrea (PSI, Villigen ; Ecole Polytechnique, Lausanne) et al.
The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H2SO4), stabilized by ammonia (NH3). However, in marine and polar regions, NH3 is generally low, and H2SO4 is frequently found together with iodine oxoacids [HIOx, i.e., iodic acid (HIO3) and iodous acid (HIO2)]. [...]
2023 - 7 p.
- Published in : Science 382 (2023) adh2526
Manuscript: PDF;
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9.
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Role of sesquiterpenes in biogenic new particle formation
/ Dada, Lubna (PSI, Villigen ; Helsinki U.) ; Stolzenburg, Dominik (Helsinki U. ; Vienna U. ; TU Vienna) ; Simon, Mario (Frankfurt U.) ; Fischer, Lukas (Innsbruck U.) ; Heinritzi, Martin (Frankfurt U.) ; Wang, Mingyi (Carnegie Mellon U. ; Caltech) ; Xiao, Mao (PSI, Villigen) ; Vogel, Alexander L (Frankfurt U.) ; Ahonen, Lauri (Helsinki U.) ; Amorim, Antonio (Lisbon U.) et al.
Biogenic vapors form new particles in the atmosphere, affecting global climate. The contributions of monoterpenes and isoprene to new particle formation (NPF) have been extensively studied. [...]
2023 - 14 p.
- Published in : Sci. Adv. 9 (2023) adi5297
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10.
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NO at low concentration can enhance the formation of highly oxygenated biogenic molecules in the atmosphere
/ Nie, Wei (Nanjing U. (main) ; Unlisted, CN ; Helsinki U. ; SYRTE, Paris) ; Yan, Chao (Nanjing U. (main) ; Unlisted, CN ; Helsinki U. ; SYRTE, Paris) ; Yang, Liwen (Nanjing U. (main)) ; Roldin, Pontus (Khlopin Radium Inst. ; Malmo U.) ; Liu, Yuliang (Nanjing U. (main)) ; Vogel, Alexander L (Frankfurt U., FIAS ; Frankfurt U.) ; Molteni, Ugo (PSI, Villigen ; UC, Irvine (main) ; Unlisted, US) ; Stolzenburg, Dominik (Helsinki U. ; Vienna U.) ; Finkenzeller, Henning (Colorado U.) ; Amorim, Antonio (CMAF, Lisbon) et al.
The interaction between nitrogen monoxide (NO) and organic peroxy radicals (RO$_{2}$) greatly impacts the formation of highly oxygenated organic molecules (HOM), the key precursors of secondary organic aerosols. It has been thought that HOM production can be significantly suppressed by NO even at low concentrations. [...]
2023 - 11 p.
- Published in : Nature Commun. 14 (2023) 3347
Fulltext: PDF;
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