Beam-induced surface modifications as a critical source of heat loads in the Large Hadron Collider

Autor: Valentine Petit, Mauro Taborelli, Danilo Andrea Zanin, Marcel Himmerlich, Holger Neupert, Paolo Chiggiato, Giovanni Iadarola

Publikováno v: Communications Physics, Vol 4, Iss 1, Pp 1-10 (2021)

Sections of the Large Hadron Collider generate more secondary electrons, which induce heat load problems and limit collider performance. Here, beamline components are examined, surface modifications responsible for enhanced secondary electron emissio

Externí odkaz: https://doaj.org/article/21a674997b5945bfba13318a06328fa9

Learning and Understanding a Software Process through Simulation of Its Underlying Model

Autor: Ulrike Becker-Kornstaedt, Holger Neu

Publikováno v: Advances in Learning Software Organizations ISBN: 9783540205913
LSO

This paper describes the usage process simulation models for better understanding the dynamic effects of processes. First, a method to build a comprehensive descriptive model is presented, which can build the foundation for the simulation model. Base

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e7a906e351ccd326832c33952a105fa8
https://doi.org/10.1007/978-3-540-40052-3_8

First operation of the KATRIN experiment with tritium

Autor: Max Aker, Konrad Altenmüller, Marius Arenz, Woo-Jeong Baek, John Barrett, Armen Beglarian, Jan Behrens, Anatoly Berlev, Uwe Besserer, Klaus Blaum, Fabian Block, Steffen Bobien, Beate Bornschein, Lutz Bornschein, Heiko Bouquet, Tim Brunst, Thomas S. Caldwell, Suren Chilingaryan, Wonqook Choi, Karol Debowski, Marco Deffert, Martin Descher, Deseada Díaz Barrero, Peter J. Doe, Otokar Dragoun, Guido Drexlin, Stephan Dyba, Frank Edzards, Klaus Eitel, Enrico Ellinger, Ralph Engel, Sanshiro Enomoto, Dieter Eversheim, Mariia Fedkevych, Arne Felden, Joseph A. Formaggio, Florian M. Fränkle, Gregg B. Franklin, Heinz Frankrone, Fabian Friedel, Dominik Fuchs, Alexander Fulst, Kevin Gauda, Woosik Gil, Ferenc Glück, Steffen Grohmann, Robin Grössle, Rainer Gumbsheimer, Moritz Hackenjos, Volker Hannen, Julius Hartmann, Norman Haußmann, Martin Ha-Minh, Florian Heizmann, Johannes Heizmann, Klaus Helbing, Stephanie Hickford, David Hillesheimer, Dominic Hinz, Thomas Höhn, Bernhard Holzapfel, Siegfried Holzmann, Thibaut Houdy, Mark A. Howe, Anton Huber, Alexander Jansen, Christian Karl, Jonas Kellerer, Norbert Kernert, Luke Kippenbrock, Manuel Klein, Christoph Köhler, Leonard Köllenberger, Andreas Kopmann, Marc Korzeczek, Alojz Kovalík, Bennet Krasch, Holger Krause, Benedikt Kuffner, Norbert Kunka, Thierry Lasserre, Luisa La Cascio, Ondřej Lebeda, Manuel Lebert, Björn Lehnert, Johann Letnev, Fabian Leven, Thanh-Long Le, Steffen Lichter, Alexey Lokhov, Moritz Machatschek, Emma Malcherek, Martin Mark, Alexander Marsteller, Eric L. Martin, Fotios Megas, Christin Melzer, Alexander Menshikov, Susanne Mertens, Matthias Meier, Sebastian Mirz, Benjamin Monreal, Pablo I. Morales Guzmán, Klaus Müller, Uwe Naumann, Holger Neumann, Simon Niemes, Mathias Noe, Andreas Off, Hans-Werner Ortjohann, Alexander Osipowicz, Ernst Otten, Diana S. Parno, Anna Pollithy, Alan W. P. Poon, J. Manuel Lopez Poyato, Florian Priester, Philipp C.-O. Ranitzsch, Oliver Rest, Rolf Rinderspacher, R. G. Hamish Robertson, Caroline Rodenbeck, Petra Rohr, Marco Röllig, Carsten Röttele, Miloš Ryšavý, Rudolf Sack, Alejandro Saenz, Peter Schäfer, Lutz Schimpf, Klaus Schlösser, Magnus Schlösser, Lisa Schlüter, Michael Schrank, Bruno Schulz, Hendrik Seitz-Moskaliuk, Waldemar Seller, Valérian Sibille, Daniel Siegmann, Martin Slezák, Felix Spanier, Markus Steidl, Madlen Steven, Michael Sturm, Manfred Suesser, Menglei Sun, Denis Tcherniakhovski, Helmut H. Telle, Larisa A. Thorne, Thomas Thümmler, Nikita Titov, Igor Tkachev, Nikolaus Trost, Korbinian Urban, Kathrin Valerius, Drahoslav Vénos, Reiner Vianden, Ana P. Vizcaya Hernández, Marc Weber, Christian Weinheimer, Christiane Weiss, Stefan Welte, Jürgen Wendel, John F. Wilkerson, Joachim Wolf, Sascha Wüstling, Weiran Xu, Yung-Ruey Yen, Sergey Zadorozhny, Genrich Zeller

Publikováno v: European Physical Journal C: Particles and Fields, Vol 80, Iss 3, Pp 1-18 (2020)

Abstract The determination of the neutrino mass is one of the major challenges in astroparticle physics today. Direct neutrino mass experiments, based solely on the kinematics of $$\upbeta $$ β -decay, provide a largely model-independent probe to th

Externí odkaz: https://doaj.org/article/c233c69d63fd42ef8d9ea5e6c5f64e49

Nondestructive Testing of the Integrity of Solid Oxide Fuel Cell Stack Elements by Ultrasound and Thermographic Techniques

Autor: Udo Netzelmann, Andrea Mross, Thomas Waschkies, Dietmar Weber, Ewald Toma, Holger Neurohr

Publikováno v: Energies, Vol 15, Iss 3, p 831 (2022)

Single planar fuel cell elements consisting of metallic interconnectors that are bonded and sealed by a thin glass solder layer form the core of a solid oxide fuel cell. For reliable operation, the bonding layer has to adhere well and must be without

Externí odkaz: https://doaj.org/article/738f66fbc2a443ac95f3791562f23b16

First accelerator test of vacuum components with laser-engineered surfaces for electron-cloud mitigation

Autor: Sergio Calatroni, Elisa Garcia-Tabares Valdivieso, Holger Neupert, Valentin Nistor, Ana Teresa Perez Fontenla, Mauro Taborelli, Paolo Chiggiato, Oleg Malyshev, Reza Valizadeh, Stefan Wackerow, Svetlana A. Zolotovskaya, W. Allan Gillespie, Amin Abdolvand

Publikováno v: Physical Review Accelerators and Beams, Vol 20, Iss 11, p 113201 (2017)

Electron cloud mitigation is an essential requirement for high-intensity proton circular accelerators. Among other solutions, laser engineered surface structures (LESS) present the advantages of having potentially a very low secondary electron yield

Externí odkaz: https://doaj.org/article/eb146ec9207147e3ab56647ebf872577