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This thesis deals with an optimization problem from the field of theoretical plasma physics. Specifically, it deals with the question of how the accelerated electrons are spatially arranged in a plasma wave generated by a laser pulse. An internal structure of this so-called witness beam is of interest for the radiation characteristics of such electron beams, in particular with regard to the coherence of the generated radiation. The resulting internal structure of the electron beam is a result of the interaction of the electrons with each other and the electric fields of the wakefield, therefore it is determined by solving a minimization problem. The thesis builds on previous results in this field and aims to find suggestions for improved algorithms to determine the minimum sought. About the Author Melinda Hagedorn is a PhD student in Mathematical Optimization, research associate and teaching assistant at Heinrich Heine University in Düsseldorf. She holds master's degrees in mathematics and physics. In her research, she focuses in particular on variants of the stochastic gradient method applied to convex optimization problems.

Particle accelerators. --- Plasma (Ionized gases). --- Plasma accelerators. --- Mathematical optimization. --- Accelerator Physics. --- Plasma Physics. --- Plasma-based Accelerators. --- Optimization. --- Plasma (Ionized gases)

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This open access book is both a memoir and a biography. Born in Czechoslovakia in 1924, Herwig Schopper is one of the few people able to bear witness to 100 years of European history. His career has taken him from research to management to diplomacy, with a major part devoted to, and inspired by, CERN. Herwig enjoyed a rich childhood, spending his summers at his grandparent’s hotel on the Adriatic coast. It is there that he developed an interest in physics though eavesdropping on holidaying professors from Budapest and Belgrade who conversed in German. His youthful idyll was shattered by the annexation of the Sudetenland, which lead to him serving in the Luftwaffe signals corps. Working as a translator for the British administration in Hamburg after the war, he also enrolled at the University and was soon granted leave to travel outside Germany for his research. So began a long string of professional relationships with leading scientists of the day: Lise Meitner, Otto Frisch, Bob Wilson, Chien Shiung Wu, Masatoshi Koshiba and Sam Ting to name but a few. Herwig came to consider them all as friends. Through his long career, Herwig has played a leading role in institutions from Erlangen to Karlsruhe, and from DESY, where he was director from 1973 to 1980, to CERN, where he served as Director-General from 1981 to 1988. Since its foundation CERN has had two major missions: to conduct first-class scientific research and to foster peaceful relations between nations. Following this example Herwig has played a key role in pioneering the deployment of science for peace, notably through the SESAME laboratory in the Middle East. This book gives a full account of Herwig’s rich and varied life and concludes with his reflections on the challenges that society faces today. .

Physicists --- Astronomers --- Particle accelerators. --- Science --- Biographies of Physicists and Astronomers. --- Accelerator Physics. --- Science Education. --- Biography. --- Study and teaching.

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This open access book introduces readers to the physics of particle accelerators, by means of beam dynamics simulations and exercises using the computer code ZGOUBI. The respective chapters are organized chronologically and trace the historical development of accelerators from electrostatic columns to storage rings, to the numerous variations on resonant acceleration and focusing techniques, while also addressing side aspects such as synchrotron radiation and spin dynamics. The book offers computer simulations in which readers can manipulate, guide, and accelerate charged particles and particle beams in most types of particle accelerator. By performing these simulation exercises, they will acquire a deeper understanding of charged particle beam optics, accelerator physics and technology, as well as the why and how of when to use one technology or the other. These exercises guide readers through a virtual world of accelerator and beam simulations, and involve e.g. manipulating beams for cancer therapy, producing synchrotron radiation for condensed matter research, accelerating polarized ion beams for nuclear physics research, etc. In addition to acquiring an enhanced grasp of physics, readers will discover the basic theoretical and practical aspects of particle accelerators’ main components: guiding and focusing magnets, radio-wave accelerating cavities, wigglers, etc. .

Particle accelerators. --- Mathematical physics. --- Radiology. --- Measurement. --- Measuring instruments. --- Biophysics. --- Accelerator Physics. --- Theoretical, Mathematical and Computational Physics. --- Measurement Science and Instrumentation.

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This thesis highlights the development and analysis of multiple neutrino detectors deployed to the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory as part of the COHERENT experiment. It includes a preliminary measurement of the neutrino-induced neutron cross section on lead, and analysis that led to the first inclusive electron-neutrino charged-current measurement on iodine. These results add to the small number of inelastic neutrino-nucleus cross sections measured in this energy range, which are useful for understanding supernova and solar neutrino detection sensitivity. Additionally, it discusses preliminary work for and design of COHERENT’s ton-scale NaI coherent elastic neutrino-nucleus scattering (CEvNS) detector, currently being deployed to the SNS. Finally, it includes information on a campaign to measure the nuclear recoil quenching factor of NaI using multiple crystals, attempting to resolve inconsistencies with existing measurements.

Nuclear physics. --- Particle accelerators. --- Measurement. --- Measuring instruments. --- Particles (Nuclear physics) --- Quantum field theory. --- Nuclear Physics. --- Accelerator Physics. --- Measurement Science and Instrumentation. --- Elementary Particles, Quantum Field Theory.

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This third edition of a well-received monograph provides a comprehensive overview of the state-of-the-art of detectors and their evolution. In addition to the silicon sensor technology described in the second edition, the book covers the following new topics: precise timing detectors (3D sensors and sensors with intrinsic gain layers), passive CMOS sensors, new developments in HV-CMOS sensors, and sparking in strip and pixel detectors. The chapter on the HL-LHC CMS upgrades has been updated, and the historical overview has been enriched with a section on the UA2 SPD pad detector system. The book includes a wealth of schematics and photos of detectors. It is also valuable for detector courses at the master/PhD level.

Particle accelerators. --- Particles (Nuclear physics). --- Electronics. --- Materials. --- Chemical detectors. --- Measurement. --- Measuring instruments. --- Accelerator Physics. --- Particle Physics. --- Electronics and Microelectronics, Instrumentation. --- Materials for Devices. --- Sensors. --- Measurement Science and Instrumentation. --- Particles (Nuclear physics)