Au cours de dix dernières années la science aux attoseconde ou Physique au champ-fort a été l’objet d’un fort développement. La production d’impulsions laser énergétiques de courte durée à haute cadence et stabilisées en CEP constitue la première étape pour accéder aux dynamiques ultra-rapides caractérisant l’interaction de la matière avec une source de lumière cohérente, intense et ultra-rapide. Le travail de cette thèse consiste à améliorer globalement les performances d’un système laser Ti:Sa à haute cadence optimisé pour la génération des impulsions attoseconde. Nous avons développé une nouvelle configuration de cavité régénérative fonctionnant à 10 kHz qui permet une meilleure gestion des effets thermiques dans le cristal. En sortie de l’amplificateur les impulsions atteignent des valeurs de puissance de 5 W en bande étroite (35 fs), ou 2.7 W en bande spectrale large permettant une compression des impulsions proche de 17 fs. La CEP des impulsions en sortie d’amplificateur a été stabilisée ; le bruit résiduel mesuré tir-à-tir est de 210 mrad pendant trois heures.L’amplificateur peut supporter également le fonctionnement en mode accordable, en sélectionnant des spectres de 30 à 40 nm de largeur à mi-hauteur et en accordant leur longueur d’onde centrale dans une gamme de 80 nm autour de 800 nm. Nous avons conçu et mis en fonctionnement un amplificateur multi-passages non-cryogéné à imagerie par lentille thermique pour accroître la puissance des impulsions jusqu’à 10 W à une cadence de 1 kHz. Le régime de forte saturation d’amplificateur garantit une variation négligeable (±3% pic à pic) de la puissance des impulsions en sortie du module, face à une variation importante de la puissance en entrée (±25% pic à pic) sur la bande spectrale accordable. L’amplification peut encore être plus importante grâce à une ligne d’amplification à refroidissement cryogénique, qui permet d’atteindre des puissances au niveau TW, à la cadence de 1 kHz, tout en maintenant un régime de courte durée (17.5 fs) et stabilité en CEP (350 mrad de bruit résiduel tir-à-tir). Nous proposons aussi une étude des sources de bruit de CEP dans les modules hautement dispersifs: nous avons conçu une nouvelle approche numérique sur la base d’un logiciel de tracé de rayon commercial (Zemax) pour évaluer les variations de CEP dans les modules contenant réseaux de diffraction. / The last decade has seen a lot of progress in attosecond science or in strong field physics. Generating energetic, few-cycle laser pulses with stabilized Carrier-Envelope Phase at high repetition rate constitutes the first step to access the ultra-fast dynamics underlying the interaction of matter with intense, ultrashort coherent light source. The work of this thesis consists in globally improving the performances of a high repetition rate Ti:Sa laser system optimized for attosecond science. We present an original 10 kHz Ti:Sa CPA laser based on an newlydesigneddouble-crystal cavity for thermal lensing management. The amplifier delivers up to 5 W in narrow band mode (35 fs pulses), or 2.7 W in broad band mode, supporting 17 fs pulses after temporal compression. We demonstrate shot-to-shot CEP stabilization with a remaining noise of 210 mrad over three hours at the front-end output. In parallel to the short pulse duration operation mode, it is possible to use the front end in a wavelength tunability mode within a 80 nm range around 800 nm, with a resolution of 1 nm and 30 to 40 nm of bandwidth. We designed and demonstrated a complete water-cooled lens-less multipass amplifier using thermal lensing for modeadaptation boosting the pulse energy up to 10mJ at 1 kHz repetition rate (up to 10 W). The saturation regime of the amplifier ensures negligible variation (±3% peak to peak) of the output power for significant variation of the input power (±25% peak to peak) over the tunability range. The energy scalability of the front-end is demonstrated by coupling its output to cryogenically cooled amplifier, delivering 1 kHz, TW-class pulses at 17.5 fs and CEP stabilized with a residual noise of 350 mrad. A study of CEP noise sources in high dispersive module is also addressed, proposing a numerical approach based on a commercial ray-tracing software (Zemax) for predicting CEP fluctuation in grating based modules.

Event stream processing (ESP) applications enable the real-time processing of continuous flows of data. Algorithmic trading, network monitoring, and processing data from sensor networks are good examples of applications that traditionally rely upon ESP systems. In addition, technological advances are resulting in an increasing number of devices that are network enabled, producing information that can be automatically collected and processed. This increasing availability of on-line data motivates the development of new and more sophisticated applications that require low-latency processing of large volumes of data. ESP applications are composed of an acyclic graph of operators that is traversed by the data. Inside each operator, the events can be transformed, aggregated, enriched, or filtered out. Some of these operations depend only on the current input events, such operations are called stateless. Other operations, however, depend not only on the current event, but also on a state built during the processing of previous events. Such operations are, therefore, named stateful. As the number of ESP applications grows, there are increasingly strong requirements, which are often difficult to satisfy. In this dissertation, we address two challenges created by the use of stateful operations in a ESP application: (i) stateful operators can be bottlenecks because they are sensitive to the order of events and cannot be trivially parallelized by replication; and (ii), if failures are to be tolerated, the accumulated state of an stateful operator needs to be saved, saving this state traditionally imposes considerable performance costs. Our approach is to evaluate the use of speculation to address these two issues. For handling ordering and parallelization issues in a stateful operator, we propose a speculative approach that both reduces latency when the operator must wait for the correct ordering of the events and improves throughput when the operation in hand is parallelizable. In addition, our approach does not require that user understand concurrent programming or that he or she needs to consider out-of-order execution when writing the operations. For fault-tolerant applications, traditional approaches have imposed prohibitive performance costs due to pessimistic schemes. We extend such approaches, using speculation to mask the cost of fault tolerance.:1 Introduction 1 1.1 Event stream processing systems ......................... 1 1.2 Running example ................................. 3 1.3 Challenges and contributions ........................... 4 1.4 Outline ...................................... 6 2 Background 7 2.1 Event stream processing ............................. 7 2.1.1 State in operators: Windows and synopses ............................ 8 2.1.2 Types of operators ............................ 12 2.1.3 Our prototype system........................... 13 2.2 Software transactional memory.......................... 18 2.2.1 Overview ................................. 18 2.2.2 Memory operations............................ 19 2.3 Fault tolerance in distributed systems ...................................... 23 2.3.1 Failure model and failure detection ...................................... 23 2.3.2 Recovery semantics............................ 24 2.3.3 Active and passive replication ...................... 24 2.4 Summary ..................................... 26 3 Extending event stream processing systems with speculation 27 3.1 Motivation..................................... 27 3.2 Goals ....................................... 28 3.3 Local versus distributed speculation ....................... 29 3.4 Models and assumptions ............................. 29 3.4.1 Operators................................. 30 3.4.2 Events................................... 30 3.4.3 Failures .................................. 31 4 Local speculation 33 4.1 Overview ..................................... 33 4.2 Requirements ................................... 35 4.2.1 Order ................................... 35 4.2.2 Aborts................................... 37 4.2.3 Optimism control ............................. 38 4.2.4 Notifications ............................... 39 4.3 Applications.................................... 40 4.3.1 Out-of-order processing ......................... 40 4.3.2 Optimistic parallelization......................... 42 4.4 Extensions..................................... 44 4.4.1 Avoiding unnecessary aborts ....................... 44 4.4.2 Making aborts unnecessary........................ 45 4.5 Evaluation..................................... 47 4.5.1 Overhead of speculation ......................... 47 4.5.2 Cost of misspeculation .......................... 50 4.5.3 Out-of-order and parallel processing micro benchmarks ........... 53 4.5.4 Behavior with example operators .................... 57 4.6 Summary ..................................... 60 5 Distributed speculation 63 5.1 Overview ..................................... 63 5.2 Requirements ................................... 64 5.2.1 Speculative events ............................ 64 5.2.2 Speculative accesses ........................... 69 5.2.3 Reliable ordered broadcast with optimistic delivery .................. 72 5.3 Applications .................................... 75 5.3.1 Passive replication and rollback recovery ................................ 75 5.3.2 Active replication ............................. 80 5.4 Extensions ..................................... 82 5.4.1 Active replication and software bugs ..................................... 82 5.4.2 Enabling operators to output multiple events ........................ 87 5.5 Evaluation .................................... 87 5.5.1 Passive replication ............................ 88 5.5.2 Active replication ............................. 88 5.6 Summary ..................................... 93 6 Related work 95 6.1 Event stream processing engines ......................... 95 6.2 Parallelization and optimistic computing ................................ 97 6.2.1 Speculation ................................ 97 6.2.2 Optimistic parallelization ......................... 98 6.2.3 Parallelization in event processing .................................... 99 6.2.4 Speculation in event processing ..................... 99 6.3 Fault tolerance .................................. 100 6.3.1 Passive replication and rollback recovery ............................... 100 6.3.2 Active replication ............................ 101 6.3.3 Fault tolerance in event stream processing systems ............. 103 7 Conclusions 105 7.1 Summary of contributions ............................ 105 7.2 Challenges and future work ............................ 106 Appendices Publications 107 Pseudocode for the consensus protocol 109

Durant la dernière décennie, les architectures orientées services (SOA) d'une part et la gestion des processus business (BPM) d'autre part ont beaucoup évolué et semblent maintenant en train de converger vers un but commun qui est de permettre à des organisations complètement hétérogènes de partager de manière flexible leurs ressources dans le but d'atteindre des objectifs communs, et ce, à travers des schémas de collaboration avancée. Ces derniers permettent de spécifier l'interconnexion des processus métier de différentes organisations. La nature dynamique et la complexité de ces processus posent des défis majeurs quant à leur bonne exécution. Certes, les langages de description de chorégraphie aident à réduire cette complexité en fournissant des moyens pour décrire des systèmes complexes à un niveau abstrait. Toutefois, rien ne garantit que des situations erronées ne se produisent pas suite, par exemple, à des interactions "mal" spécifiées ou encore des comportements malhonnêtes d'un des partenaires. Dans ce manuscrit, nous proposons une approche décentralisée qui permet la supervision de chorégraphies au moment de leur exécution et la détection instantanée de violations de séquences d'interaction. Nous définissons un modèle de propagation hiérarchique pour l'échange de notifications externes entre les partenaires. Notre approche permet une génération optimisée de requêtes de supervision dans un environnement événementiel, et ce, d'une façon automatique et à partir de tout modèle de chorégraphie / Cross-organizational service-based processes are increasingly adopted by different companies when they can not achieve goals on their own. The dynamic nature of these processes poses various challenges to their successful execution. In order to guarantee that all involved partners are informed about errors that may happen in the collaboration, it is necessary to monitor the execution process by continuously observing and checking message exchanges during runtime. This allows a global process tracking and evaluation of process metrics. Complex event processing can address this concern by analyzing and evaluating message exchange events, to the aim of checking if the actual behavior of the interacting entities effectively adheres to the modeled business constraints. In this thesis, we present an approach for decentralized monitoring of cross-organizational choreographies. We define a hierarchical propagation model for exchanging external notifications between the collaborating parties. We also propose a runtime event-based approach to deal with the problem of monitoring conformance of interaction sequences. Our approach allows for an automatic and optimized generation of rules. After parsing the choreography graph into a hierarchy of canonical blocks, tagging each event by its block ascendancy, an optimized set of monitoring queries is generated. We evaluate the concepts based on a scenario showing how much the number of queries can be significantly reduced

AH Cep and CW Cep are both early B-type binaries with short orbital periods of 1.8 days and 2.7 days, respectively. All four components are B0.5V types. The binaries are also double-lined spectroscopic and eclipsing. Consequently, solutions for orbital and stellar parameters make the pair of binaries ideal targets for a study of the colliding winds between two B stars. Chandra ACIS-I observations were obtained to determine X-ray luminosities. AH Cep was detected with an unabsorbed X-ray luminosity at a 90% confidence interval of erg s−1, or , relative to the combined Bolometric luminosities of the two components. While formally consistent with expectations for embedded wind shocks, or binary wind collision, the near-twin system of CW Cep was a surprising nondetection. For CW Cep, an upper limit was determined with , again for the combined components. One difference between these two systems is that AH Cep is part of a multiple system. The X-rays from AH Cep may not arise from standard wind shocks nor wind collision, but perhaps instead from magnetism in any one of the four components of the system. The possibility could be tested by searching for cyclic X-ray variability in AH Cep on the short orbital period of the inner B stars.

Die vorliegende Arbeit ist der Verbesserung der Carrier-Envelope Phasenstabilisierung von ultrakurzen Laserimpulsen gewidmet. Zur Realisierung von Fortschritten auf diesem Gebiet werden die grundlegenden Rauschquellen identifiziert, die das erzielbare Restphasenrauschen limitieren, und geeignete Maßnahmen zu deren Verringerung vorgeschlagen. Es wird gezeigt, dass sowohl die Messung der Carrier-Envelope Phase (CEP) als auch deren Kontrolle durch verschiedene Rauschbeiträge beeinträchtigt wird. Der Detektionsprozess ist dabei einerseits durch technische Rauschquellen beeinflusst, die vor allem in den verwendeten nichtlinearen Interferometern auftreten. Andererseits repräsentiert das Detektionsrauschen während der elektro-optischen Wandlung eine fundamentale Limitierung, da das optische Schrotrauschen sowie das Rauschen des Lichtdetektors die Messung der CEP unausweichlich beeinträchtigen. Es wird demonstriert, wie solche Beschränkungen durch geeignete Wahl der Interferometertopologie, bzw. durch Optimierung des spektralen Verbreiterungsmechanismus verringert werden können. Experimentell gelingt es dadurch den Signal-Rauschabstand der Phasenmessung um 20 Dezibel zu steigern. Hinsichtlich der CEP Kontrolle von Oszillatoren wird in dieser Arbeit ein neuartiges Doppelstabilisierungskonzept vorgestellt, welches eine feed-forward Stabilisierung, die auf einem akustooptischen Frequenzschieber beruht, mit einer klassischen Feedback Regelung kombinert. Mit diesem Konzept gelingt eine Reduzierung des Phasenrestrauschen auf beispiellose 20 Milliradian. Darüber hinaus werden weitere neue Stabilisierungskonzepte vorgestellt, die ohne Feedback zu dem Laseroszillator auskommen. Bei einem dieser Konzepte, handelt es sich um eine gepulste feed-forward Stabilisierung, die speziell für das Zusammenwirken mit einer Verstärkerstufe konzipiert ist. Erste experimentelle Ergebnisse zeigen, dass Phasenrestrauschen von weniger als 100 Milliradian auch für Verstärkersysteme erreichbar sind. / The present thesis is dedicated to improvements of the carrier-envelope phase stabilization of ultrashort laser pulses. In order to realize such improvements, the fundamental noise sources are identified, and suitable measures for their reduction are proposed. It is shown that both, the measurement of the carrier-envelope phase (CEP) as well as its control are corrupted by different noise contributions. On the one hand, the detection process is influenced by technical noise sources, which arise especially in the used nonlinear interferometers. On the other hand, the detection noise in the electro-optic conversion represents a fundamental limitation, since the optical shot noise as well as the noise induced by the light detector inevitably influence the measurement of the CEP. It is demonstrated how such limitations can be minimized by a suitable choice of the interferometer topology and by an optimization of the spectral broadening process in a micro-structured fiber. This way an enormous improvement of the signal-to-noise ratio by 20 dB is obtained experimentally, which significantly reduces the limitation of detection noise. For controlling the CEP of mode-locked oscillators, a novel double stabilization scheme is introduced in this thesis, which combines a feed-forward stabilization based on an acousto-optic frequency shifter, with a classical feedback loop. This method enables a reduction of the residual phase jitter to an unprecedented value of 20 milliradian. Beyond that, several further concepts are introduced that are capable of stabilizing the CEP without any feedback to the laser oscillator. One of these concepts, represents a pulsed feed-forward stabilization, which is specifically designed for the use in combination with a subsequent amplification stage. First experimental results indicate that residual phase jitters of less than 100 milliradian are within reach also for amplified laser systems.

[pt] Etnografia afetiva do Boato, coletivo de artistas que atuou por onze anos no Rio de Janeiro. Partindo da poesia falada e estendendo sua atuação a diversas expressões artísticas, o Boato é caso original no cenário cultural carioca. Elemento importante na criação do CEP 20.000 – o Centro de Experimentação Poética do Rio de Janeiro, que desde 1990 realiza eventos em torno da poesia – o grupo praticou experimentações artísticas em diversas linguagens, tais como teatro, cinema, música, vídeo, dança e performance. A tese reconstrói a trajetória do Boato de maneira crítica, procurando repensá-la e ressignificá-la, compreender seu trânsito e sua produção no panorama cultural do Rio de Janeiro. A história do coletivo funciona como sistema irradiador das principais questões da pesquisa: a poesia falada, sua linhagem carioca, seus grupos históricos, a ocupação do espaço urbano, coletivos artísticos, experiência e criação coletiva, política e cultura, amizade, compartilhamento, performance. O autor, fundador e ex-integrante do grupo, apresenta um viés autoetnográfico e narrativo, incorporando ao texto diferentes dicções, entre elas a de tese oral. / [en] The thesis presents an affective ethnography of Boato, a collective of artists who during eleven years performed in Rio de Janeiro, from 1989 to 2000. Starting out with spoken poetry and evolving to perform in a variety of artistic expressions and segments, the Boato group is an unique case in Rio de Janeiro s cultural scene. While playing a key role in the creation process of CEP 20000 - Poetical Experimentation Center of Rio de Janeiro, which has held poetry events since 1990, Boato extended their artistic experimentation to several languages, such as theater, film, music, video, dance and performance. This thesis reconstructs the history of Boato in a critical manner, trying to analyse it and find new meanings therein, the causes and consequences in Rio de Janeiro s cultural panorama. The history of the group punctuates main issues of the research: spoken poetry, its origins in Rio, its historical groups, occupation of public places, artistic collectives, collective experience and creation, politics and culture, performance, friendship and sharing. The author, a former founding member of Boato, presents a self-ethnographic outlook, introducing different dictions to the text, such as the concept of oral thesis.

[pt] A dissertação procura realizar, através de uma rede de troca de cartas, um recorte hipotético do sentimento de uma época. Usando as cartas como registro daquilo que poderia se chamar uma geração, mas abandonando o sentido cronológico do termo para abraçar seu sentido gerador, o trabalho reúne em um diálogo epistolar um grupo de artistas que criam e criaram a partir de pontos de partida – experiências – que se cruzam, se influenciam ou se complementam. Tendo como ponto de partida o evento CEP 20.000 – importante palco de experimentação artística do Rio de Janeiro, que há 26 anos funciona como ponto de partida, ponte entre artistas e pista de decolagem para projetos artísticos diversos –, o trabalho encontra na morte do escritor Ericson Pires - um dos fundadores do CEP e aglutinadores principais desses encontros, circunscritos na Zona Sul do Rio de Janeiro – a faísca para a decolagem dessa troca de cartas coletiva. Buscando a sobreposição de vozes e a fricção de discursos a fim de ampliar qualquer noção que pudesse miopemente querer significar ou totalizar a ideia desse grupo selecionado como um retrato geracional, a dissertação não tem como ponto de chegada uma conclusão reveladora ou simbólica. Intercalar essas falas, encenar a epistolografia de um grupo em um período, um ponto de estímulo, uma natureza de diálogo – íntima ao mesmo tempo que ficcional, confessional ainda que crítica – é o que o trabalho procura alcançar. / [en] The dissertation attempt to create, through an epistolar network, a hypothetical portrait of an era. Using the letters as a document of what could be called a generation, but leaving the chronological sense of the term behind and embracing its generator aspect, this work puts together an epistological conversation between artists that create from similar or complementary starting points – experiences. Using as a starting point the event CEP 20.000 – an important artistic and experimental stage in Rio de Janeiro, working as meeting and melting point to poets, composers and music acts, actors and performers since 1990 -, this dissertation finds in the death of Ericson Pires – writer and one of the founders of CEP 20.000 – the spark that lights the fuel to this collective trading-letters network. Using the overlap and friction of voices and speeches to expand any idea of generation, the project doesn t really look for one symbolic conclusion. Merging these speeches, staging the epistolography of an group in a period of time, a point of stimulation, some kind of dialog – private and, at the same time, fictional; confessional but yet critical – are the goals that this project forward to reach.

Les protoétoiles de masse intermédiaire (IM) (2 ≤ M* ≤ 8 Msun) sont le lien entre les étoiles de faible et haute masse car elles couvrent également un intervalle intermédiaire de luminosités, de densités et de températures [Fuente et al., 2012]. Même si les « IM-YSOs » jouent un rôle important dans l'étude de la formation des étoiles, on a très peu de connaissances sur la formation et l'évolution des premières étapes des protoétoiles de masse intermédiaire. Les études systématiques spectrales sont un outil puissant pour caractériser la composition chimique d'un objet astrophysique, et la seule façon d'obtenir un recensement complet des espèces chimiques. Une étude spectrale fournit également des lignes multiples de la même molécule, donnant la possibilité d'une analyse multifréquences ainsi que d'une modélisation. En outre, grâce aux profils des raies, nous pouvons obtenir des informations sur la cinématique, et identifier les structures au long de la ligne de vue, en tant que sources multiples, des jets ou des cavités, par exemple, [Caux et al., 2011]. Les phénomènes d'éjection (jets, des vents et des « outflows » bipolaires moléculaires), sont une phase inhérente au processus de formation d'étoiles observées dans les YSOs de toutes masses dans des longueurs d'onde millimétriques. Cependant, il n'y a pas d'études systématiques dans l'intervalle de masse intermédiaire comme dans le cas des protoétoiles de faible et haute masse. Compte tenu de l'absence d'une étude systématique de la partie mm/submillimétrique dans le spectre des protoétoiles de masse intermédiaire, au cours de ma thèse, j'ai mené une étude systématique spectrale vers la protoétoile de masse intermédiaire de classe 0 Cep E et de son « outflow » moléculaire. / Intermediate-mass (IM) protostars (2 ≤ M∗ ≤8 Msun) are the link between low and the high mass stars as they cover also an intermediate range of luminosities, densities and temperatures [Fuente et al., 2012]. Even though the IM-YSOs are important in the study of star formation, very little is known about the formation and first evolutionary stages of IM protostars. Unbiased spectral surveys are a powerful tool to characterize the chemical composition of an astrophysical object, and the only way to obtain a complete census of the chemical species. A spectral survey provides also multiple lines from the same molecule, giving the possibility of a multi-frequency analysis and modeling. Also, through line profiles, we can obtain kinematic information, and identify structures along the line of sight, as multiple sources, outflows, jets or cavities, e.g. [Caux et al., 2011]. The outflow phenomena (jets, winds and bipolar molecular outflows), are an inherent phase in the process of star formation observed in YSOs of all range of masses at millimeter wavelengths. However, there are not systematic studies in IM range as in the case of of low- and high-mass protostars. Given the lack of a systematic study of the mm/submm spectrum of IM protostars, during my thesis I carried out an unbiased spectral survey towards IM Class 0 Cep E protostar and its molecular outflow.

Depuis une vingtaine d’années, la physique attoseconde, via le phénomène de génération d’harmoniques d’ordres élevés (HHG), a permis de nombreuses avancées dans la compréhension des phénomènes de dynamique ultra-rapide. Les lasers femtoseconde émettant des impulsions de fortes énergies et de durées de quelques cycles optiques sont les outils indispensables à cette physique. De plus, la phase entre la porteuse et l’enveloppe (CEP) des impulsions doit être contrôlée. Récemment les lasers basés sur les fibres dopées ytterbium ont permis de transposer les expériences d’HHG à haute cadence. La stabilisation de la CEP pour ce type de systèmes constitue la brique manquante au développement de sources à haute cadence pleinement compatibles avec ces applications. Cette thèse a été consacrée à la stabilisation CEP d’un laser à fibre dopée ytterbium pour une application à la génération de rayonnement cohérent dans l’XUV à fort flux de photon. Dans la première partie nous présentons l’architecture d’une source à un taux de répétition de 100 kHz stable en CEP émettant des impulsions de 30 microjoules et 96 fs. Ce système constitue une preuve de principe pour les futures sources haute énergie. La stabilisation de CEP est assurée par une architecture hybride composée d’un injecteur stabilisé passivement suivi d’un amplificateur de puissance stabilisé activement. Un bruit résiduel de CEP inférieur à 400 mrad est obtenu dans différentes configurations, de la mesure courte durée (1 s) tir à tir jusqu’à la mesure sur une heure de fonctionnement. Dans la seconde partie nous présentons la mise au point d’une ligne HHG XUV optimisée à 13 nm sur les paramètres d’un laser à fibre, pour des applications à l’imagerie par diffraction cohérente. / In the last two decades, attosecond physics, based on the high harmonic generation (HHG) phenomenon, has allowed a better understanding of ultrafast dynamics in the microcosm. High-energy few-cycles carrier-envelope phase (CEP) stabilized sources are the main enabling tools for this physics. Recently, temporally compressed Ytterbium-doped fiber amplifiers have been successfully used as high XUV photon flux HHG drivers. CEP stabilization of these sources would ensure their full compatibility with attoscience. The thesis is devoted to the CEP stabilization of a high repetition rate Yb-doped fiber femtosecond source, for high XUV photon flux beamline applications. In the first part, we present the architecture of such a source at 100 kHz repetition rate delivering 30 microjoules 96 fs CEP-stable pulses. It constitutes a test bench for future energy-scaled few-cycle sources. The CEP stabilization is ensured in a hybrid architecture including a passively stabilized frontend followed by an actively stabilized power amplifier. A residual CEP noise <400 mrad is measured using various setups, including a shot-to-shot measurement over 1 s and a long-term stability over 1 h. In the second part, we discuss the design of a high flux HHG beamline optimized for a future generation of fiber-based driver at 13 nm for applications to coherent diffraction imaging.

[pt] A tese CEP 20.000 - Centro de Experimentação Poética - Uma Utopia Falada percorre e registra os 30 anos do CEP 20.000, um dos mais importantes e influentes eventos de poesia do Rio de Janeiro através de um olhar jornalístico, documental, historiográfico mas também testemunhal - visto que seu autor fez parte, como artista e também como produtor de uma fatia considerável dessa história. Abrindo espaço para experimentações artísticas nas mais diversas frentes - com enfoque especial na poesia falada - o CEP 20.000 já recebeu dezenas de milhares de artistas em suas três décadas de atividades, para participarem em apresentações curtas diante de um público ávido. A tese busca localizar o CEP, a partir das premissas estabelecidas por Michel Foucault, como uma heterotopia que merece seu lugar em uma espécie de linha pontilhada ou rizoma histórico da contracultura - partindo do Cabaret Voltaire, passando pelos Beats, os hippies, a geração marginal e os punks. A trajetória do CEP é contada de dentro do Espaço Cultural Sérgio Porto, seu palco principal, mas também pelo trabalho e a vida das tantas pessoas ligadas ao evento - e, com isso, a história do CEP supera seus próprios limites e acaba indo além dos 30 anos e das paredes de seu palco, contando também um pouco a história de um período da contracultura e da cena literária e musical do Rio de Janeiro, desde os anos 1990 e até hoje. / [en] The dissertation CEP 20.000 - Center of Poetic Experimentation - A Spoken Utopia covers the 30 years history of CEP 20.000, one of the most important and influential poetry events in Rio de Janeiro. Built on a journalistic, documentary, historiographic perspective, the dissertation also has a testimonial essence - given the author took part of it as cast and crew for over a decade. An open stage to all styles of artistic expression - with deeper focus on spoken poetry - CEP 20.000 has received tens of thousands of artists for short performances in front of an avid audience of around 200 people since 1990. This work seeks to positioning CEP 20.000, based on Michel Foucault s premisses, as an heterotopia, who deserves its place in a kind of dot line or historical rhizome of counterculture through history - from Cabaret Voltaire, the Beat generation, hippies, the marginal generation in Brazil, to punk and beyond. The trajectory of CEP is revisited from within Espaço Cultural Sergio Porto theater, its main venue, but also through the work and life of all the people connected to the event - transcending the boundaries of its own three decade existence and the limits of its stage to find its place as part of Rio s counterculture history, literary and musical scene, since the 1990 s till today.