Driven by the CMB temperature-redshift (T -z) relation as demanded by deconfining SU(2) Yang-Mills thermodynamics, an according cosmological model is proposed and analysed. This model -SU(2) cmb -exhibits a dark sector, representing ΛCDM with a certain late-time dark-matter density which transitions to a reduced (present-day) density parameter at high z. We statistically analyse constraints on cosmological parameters directly imposed by the values of the standard co-moving ruler r d and the angular size of the sound horizon θ * . Compared to the ΛCDM best fit to 2015 Planck data, we require an increased (present-day) dark matter density when r d · H 0 = const and a value H 0 ∼ 73.5 km s −1 Mpc −1 -typical for local extractions -are used. The ratio between the density parameters of primordial and late-time dark matter ranges between 0.5 and 0.7. We confirm this trend by fitting the predictions of SU(2) cmb , obtained from a modified CLASS code, to the angular power spectra TT, TE, and EE. We consider adiabatic, scalar primordial curvature perturbations and distinguish two treatments of thermal quasi-particles in the perturbation equations. Best fits predict a red-tilted primordial power spectrum. Moreover, a low baryon density is obtained compared with the coincidence value of BBN, the ΛCDM best fit of the 2015 Planck data, and the observed deuterium abundance. Our derived values of H 0 support the results of local cosmological observations. Also, there is a tendency for late reionisation. Pdflatex could not properly compile abstracts with less than
The assessment of radiation damage to electronics is a complex process and requires a detailed description of the full particle energy spectra, as well as a clear characterization of the quantities used to predict radiation damage. FLUKA, a multi-purpose particle interaction and transport code, is capable of calculating proton-proton and heavy ion collisions at LHC energies and beyond. It correctly describes the entire hadronic and electromagnetic particle cascade initiated by secondary particles from TeV energies down to thermal neutrons, and provides direct scoring capabilities essential to estimate in detail the possible risk of radiation damage to electronics. This paper presents the FLUKA capabilities for applications related to radiation damage to electronics, providing benchmarking examples and showing the practical applications of FLUKA at CERN facilities such as CNGS and LHC. Related applications range from the study of device effects, the detailed characterization of the radiation field and radiation monitor calibration, to the input requirements for important mitigation studies including shielding, relocation or other options.
Arrays of limited streamer tubes of the Iarocci type were deployed in our experiment at CERN as part of a forward muon detector system with provisions for the beam to pass through the center of each panel in the array. A total of sixteen 4 m x 4 m panels were assembled with inductive readout strips on both sides of each panel. An active feedback system was deployed to regulate the high voltage to the streamer tubes to insure a constant e ciency for minimum ionizing particles. The arrays were operated in this environment for over ve y ears of data taking. Streamer tube track-reconstruction e ciencies and tube replacement rates are reported.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.