In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
El objetivo de estas Jornadas es reunir a la comunidad científica española integrada en la Agrupación CPAN(Centro Nacional de Física de Partículas, Astropartículas y Nuclear) en torno a una discusión conjunta sobre la situación actual del campo y su prospectiva
La consolidación del CPAN y su articulación como una nueva institución con carácter permanente a nivel nacional es también uno de los objetivos básicos de discusión de este encuentro.
Durante las jornadas habrá conferencias invitadas y presentaciones cortas de carácter científico sobre las distintas líneas de investigación que abarca el CPAN. Asimismo, en las jornadas se celebrarán reuniones de las diferentes redes y sesiones paralelas de discusión de las cuatro áreas del CPAN con el objeto de potenciar la cooperación de los grupos españoles de investigación y articular de forma conjunta las líneas prioritarias de actuación.
Fock Quantization of the Dirac Field in Hybrid Quantum Cosmology20m
I study the Fock representations for a Dirac field given by the the different choices of creation and annihilation variables. This is done in the context of a perturbed flat cosmology that, in addition, is minimally coupled to fermionic perturbations. In our description, I use a canonical formulation for the entire system, formed by the underlying cosmological spacetime and all its perturbations. I start with the family of vacua that allows a unitarily implementable quantum evolution that is employed in hybrid quantum cosmology. Then, its restriction to that lead to some finite ultraviolet backreaction in the quantum Hamiltonian constraint and to a fermionic Hamiltonian operator that is properly defined in the span of the n-particle/antiparticle states, in the context of hybrid quantum cosmology. The ultimate step comes with a completely diagonal quan- tum evolution, achieved by restricting our choice to an almost complete extent. I compare these results with the ones given by the so-called adiabatic scheme which was originally developed in the context of quantum field theory in fixed cosmological backgrounds, I find that all adiabatic states belong to the unitary equivalence class of Fock representations that allow a unitarily implementable quantum evolution. In particular, this unitarity of the dynamics ensures that the vacua defined with adiabatic initial conditions at different times are unitar- ily equivalent. Finally, all adiabatic orders other than zero allow the definition of annihilation and creation operators for the Dirac field with appropriate ultraviolet properties.
Activation measurements of interest in protontherapy20m
Andrea Espinosa Rodríguez
(Universidad Complutense de Madrid)
Blancos sólidos de He para experimentos de física nuclear básica20m
Francisco Javier Ferrer
(Centro Nacional de Aceleradores)
Image Reconstruction of Protoacoustic Signals20m
Proton-range verification is an important challenge in proton radiotherapy. Many methods have been proposed to reduce the uncertainty in the localization of the deposited dose with these treatments. The radio-induced thermoacoustic effect (i.e. the conversion of some of the deposited energy in a tissue into acoustic waves) can be used to measure the penetration depth of the proton beams in real-time. This method has significant advantages compared to other alternatives, as it requires a low-cost and small equipment, but it is challenging due to the intrinsic low signal-to-noise ratio (SNR) of the measured data and the complex propagation of the acoustic waves in heterogeneous media. In this work, we present several algorithms and regularization methods for protoacoustic image reconstruction, and evaluated which one is able to provide better image quality with very noisy data. We used simulated data of the deposited dose of a proton beam in a water tank, converted into an initial pressure-wave using the dose-acoustic equation, and then propagated the acoustic wave in the medium using the software k-Wave. We finally added zero-mean Gaussian noise to the resulting signal recorded by a transducer placed in the beam direction. Our results indicate that even with noisy data, both the gradient-descent and a adapted version of the MLEM algorithm, commonly used in other medical imaging techniques such as Positron Emission Tomography, can be used to successfully reconstruct the dose distribution. These promising results have to be validated with real data acquired in a proton-beam facility.
Técnicas de imagen en el CNA20m
María de los Ángeles Millán Callado
(Universidad de Sevilla - Centro Nacional de Aceleradores (US-CSIC-Junta de Andalucía))
Brans-Dicke as an effective Dynamical Dark Energy model20m
We revisit Brans-Dicke type cosmologies. In the last years, this alternative has grown in popularity, because of the possibility it may explain cosmological data better than the current ΛCDM paradigm. Besides, as a difference from other scalar-tensor theories, we can assign a clear role to the variation of the scalar field through the cosmic history: a change in the effective Gravitational constant which, despite small, can affect the structure formation and reduce the H0 tension. In addition, if one tries to encapsulate the slow evolution of the BD-field in terms of the current GR paradigm (in which G remains constant), the effective theory that emerges is a variant of the ΛCDM framework in which ρΛ acquires a time-evolving component and plays the role of an effective dynamical vacuum energy density. The effective model, therefore, is not exactly the traditional ΛCDM but, when confronted with cosmological data, it has additional features that let it to be a possible good candidate for the new model of gravity that governs our cosmos
Neutron dosimetry in pulsed fields with LINrem detectors20m
(Institut de Tècniques Energètiques (INTE), Universitat Politècnica de Catalunya (UPC))
Muography applied to the preventive maintenance of industrial structures20m
Muography is emerging as an effective Non-Destructive Testing technique in the last years. Due to the high penetration power of cosmic muons and its natural and inexpensive origin, several companies are considering to apply it to the preventive maintenance of industrial equipment such as pipes and cauldrons. This contribution reviews the construction of a fully operative gas-based muon detector system and the development of algorithms including state-of-the-art machine learning techniques applied to the measurement of the degradation of the inner walls of an insulated pipe.
Pablo Martinez Ruiz Del Arbol