The Sport Project: an Experimental Overview

The Sky Polarization Observatory (SPOrt) is presented as a project aimed to measure the diffuse sky polarized emission, from the International Space Station, in the frequency range 20-90 GHz with 7 degrees of HPBW. The SPOrt experimental configuration is described with emphasis on the aspects that make SPOrt the first European scientific payload operating at microwave wavelengths

Sensor development for the CMS pixel detector

The CMS experiment which is currently under construction at the Large Hadron Collider (LHC) at CERN (Geneva, Switzerland) will contain a pixel detector which provides in its final configuration three space points per track close to the interaction point of the colliding beams. Because of the harsh radiation environment of the LHC, the technical realization of the pixel detector is extremely challenging. The readout chip as the most damageable part of the system is believed to survive a particle fluence of 6x10 sup 1 sup 4 n sub e sub q /cm sup 2 (All fluences are normalized to 1 MeV neutrons and therefore all components of the hybrid pixel detector have to perform well up to at least this fluence. As this requires a partially depleted operation of the silicon sensors after irradiation-induced type inversion of the substrate, an ''n in n'' concept has been chosen. In order to perform IV-tests on wafer level and to hold accidentally unconnected pixels close to ground potential, a resistive path between the pixels has been implemented by the openings in the p-stop implants surrounding every pixel cell. A prototype of such sensors has been produced by two different companies and especially the properties of these resistors have extensively been tested before and after irradiation

Silicon sensors development for the CMS pixel system

The CMS experiment will operate at the Large Hadron Collider (LHC). A hybrid pixel detector located close to the interaction region of the colliding beams will provide high resolution tracking and vertex identification which will be crucial for b quark identification. Because of the radiation environment of the LHC, the performance of the sensors must be carefully evaluated up to a fluence of 6 multiplied by 10**1**4n//e//qcm **-**2. We expect that the sensors will be operated partially depleted during their operation at the LHC and we have implemented an n**+ on n sensor design. We have irradiated prototype sensors to a dose of 1 multiplied by 10 **1**5n //e//qcm**-**2. We present the results of our testing before and after irradiation

Design and test of pixel sensors for the CMS experiment

The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) will have a silicon pixel detector as its innermost tracking device. The pixel system will be exposed to the harsh radiation environment of the LHC. Prototype sensors have been designed to meet the specifications of the CMS experiment. The sensors are n/sup +/-n devices to allow partial depletion operation after bulk type inversion. The isolation of the n/sup +/ pixels is provided through a novel double open p-ring design that allows sensor testing before bump bonding and flip chipping. The prototype wafers contain a variety of p-stop designs and are fabricated by two vendors on different bulk substrates including oxygenated silicon. A study of the static measurement of the prototype sensors before irradiation is presented. (2 refs)

Beam test results of the US-CMS forward pixel detector

CMS will use silicon pixel as its innermost tracking device. Prototypes of these 150 mum square pixels bump bonded to DMILL readout chips were tested at CERN in a pion beam. A silicon telescope consisting of 8 planes of silicon strips was used to interpolate tracks to the position of the pixel detector. Data were taken with the beam at different angles of incidence relative to the pixel sensors. Position resolutions between 10 and 20 mum, depending on the hit position, were observed using charge sharing for the final configuration with unirradiated detectors. The observed resolution was as expected

Child care at CERN: Recommendations for Improvements of the Child Care Situation at CERN

This is a document summarizing a survey of child care needs of CERN staff and users which was performed in February 2008 by the CERN Child Care Initiative. The document presents the analysis of this data. Conclusions on the minimal facilities size are derived and possible funding source at the European Union are discussed