New development of a Radiation-Hard Polycrystalline CdTe Detector for LHC Luminosity Monitoring

Detectors presently considered for monitoring and control of the LHC luminosity will sample the hadronic/electromagnetic showers produced by neutrons and photons in copper absorbers designed to protect the superconducting magnets from quenching. At this location the detectors will have to withstand extreme radiation levels and their long term operation will have to be assured without requiring human intervention. For this application we have successfully tested thick polycrystalline-CdTe detectors. The paper summarizes the results obtained on rise-times, sensitivity and resistance to neutron irradiation up to a dose of 10 ^15/cm 2

CdTe Photoconductors for LHC Luminosity Monitoring

Detectors using CdTe photoconductors are being used with great success in LEP to monitor the vertical beam emittance. They can withstand tremendous irradiation, of up to 10^13 Gy, from hard X-rays. For the LHC, monitors measuring the relative luminosity will be placed inside absorbers located 142 m from the interaction points, where they will receive about 10^8 Gy per year due to gamma radiation and neutrons. Thick-polycristalline-CdTe detectors were recently tested for speed, sensitivity and radiation resistance before and after receiving up to 10^15 neutrons per cm^2. The test results are presented here, along with a comparison of the calculated charge deposition in Silicon, Diamond and GaAs detectors

Fast Polycrystalline-CdTe Detectors for LHC Luminosity Measurements

Beam diagnostics in future high-energy accelerators will require long lived instrumentation in highly hostile radiation environments. A research program aiming at individuating new solutions and testing them under extreme operational conditions has been launched at CERN in the framework of developments for the LHC instrumentation. Its outcome might be used in future accelerator projects, in industry or in physics applications. The detectors which will be adopted for the LHC luminosity monitoring and optimization will be installed close to or inside copper absorbers specifically designed for radiation protection of the accelerator magnetic elements in the interaction regions. These detectors will have to withstand extreme radiation levels and their long-term operation has to be assured without requiring human intervention. Polycrystalline-CdTe detectors have demonstrated their radiation hardness against extreme doses of X-ray exposure in the LEP collider and are considered as good candidates for LHC luminosity monitoring applications. After recalling a series of measurements obtained on CdTe samples exposed to different sources to study their time response and sensitivity we present results on their performance after irradiation at doses of 10^16 neutrons/cm^2. This is a preliminary step in the program intended to test the samples during and after irradiation up to levels of 10^18 neutrons/cm^2 and 10^16 protons/cm^2 comparable to those anticipated at the detector locations over ten years of operation of the accelerator

Co-energy-based lookup table model for DC-excited flux-switching motor: study at vehicle level

This paper concerns an initial simplified steady- state method to start to evaluate the behavior of a dc-excited flux-switching motor at a steady- state, or slow dynamic, vehicle level. Starting from a simplified finite-element motor representation, a two-dimensional co-energy lookup table model is extracted. Then, a model reduction is performed to create steady-state loss maps of the system parts at different torque-speed points, considering the simplified losses. These loss maps are integrated into an electric vehicle model, where a discussion is introduced to illustrate the limitation of using efficiency maps. Finally, to determine an average efficiency of the electrical powertrain during drive cycles, a fast simplified steady-state calculation is performed

Co-energy-based lookup table model for DC-excited flux-switching motor:study at vehicle level

\u3cp\u3eThis paper concerns an initial simplified steady- state method to start to evaluate the behavior of a dc-excited flux-switching motor at a steady- state, or slow dynamic, vehicle level. Starting from a simplified finite-element motor representation, a two-dimensional co-energy lookup table model is extracted. Then, a model reduction is performed to create steady-state loss maps of the system parts at different torque-speed points, considering the simplified losses. These loss maps are integrated into an electric vehicle model, where a discussion is introduced to illustrate the limitation of using efficiency maps. Finally, to determine an average efficiency of the electrical powertrain during drive cycles, a fast simplified steady-state calculation is performed.\u3c/p\u3

Extensive functional genomics information from early developmental time points for pig and chicken

The global Functional Annotation of Farm Animal Genomes initiative (FAANG) aims to improve animal breeding by improved genomic prediction via integration of functional genomics information. The GENESWitCH project has produced extensive functional genomics information for a variety of important tissues at early embryonic timepoints for both chickens and pigs. These datasets will be integrated to produce both tissue and time-point specific transcript, gene, and regulatory annotation for both species. In this paper, we describe the aims of the project, and the initial release of both raw and processed data