J. J. Lozano Bahilo

3D detectors with electrodes penetrating through the silicon wafer and covering the edges were tested in the SPS beam line X5 at CERN in autumn 2003. Detector parameters including efficiency, signal-to-noise ratio, and edge sensitivity were measured using a silicon telescope as a reference system. The measured sensitive width and the known silicon width were equal within less than 10 mum.

A large area (60 mm/spl times/60 mm) n-bulk and n-strip readout silicon strip detector prototype was fabricated for the ATLAS SCT detector. Detector modules with a strip length of 12 cm were made by butting two detectors. One of the 12 cm modules was irradiated with protons to a fluence of 1.2/spl times/10/sup 14/ p/cm/sup 2/, and a beam test was carried out for the non-irradiated and the irradiated detector modules. Efficiency and noise occupancy were analyzed using the beam test data. High efficiency was obtained for both detectors in the bias voltages down to about half the full depletion voltage. The noise occupancy was <2/spl times/10/sup -4/ for the 12 cm strips. The measurement of the edge region exhibited a difference in the sensitivity under the bias resistance where no extension of the n/sup +/-implant was fabricated: the non-irradiated detector showed sensitivity while the irradiated detector did not. The result was confirmed with a laser.

This paper describes the design and implementation of the grounding and shielding system for the ATLAS SemiConductor Tracker (SCT). The mitigation of electromagnetic interference and noise pickup through power lines is the critical design goal as they have the potential to jeopardize the electrical performance. We accomplish this by adhering to the ATLAS grounding rules, by avoiding ground loops and isolating the different subdetectors. Noise sources are identified and design rules to protect the SCT against them are described. A rigorous implementation of the design was crucial to achieve the required performance. This paper highlights the location, connection and assembly of the different components that affect the grounding and shielding system: cables, filters, cooling pipes, shielding enclosure, power supplies and others. Special care is taken with the electrical properties of materials and joints. The monitoring of the grounding system during the installation period is also discussed. Finally, after connecting more than four thousand SCT modules to all of their services, electrical, mechanical and thermal within the wider ATLAS experimental environment, dedicated tests show that noise pickup is minimised. © 2012 IOP Publishing Ltd and Sissa Medialab srl.

Presented at the Cracow Epiphany Conference on Physics in Underground Laboratories and Its Connection with LHC, Cracow, Poland, January 5–8, 2010.

Diez meses despues de la destruccion de la ciudad de Armero, Colombia, 100 pacientes adultos fueron entrevistados en dos centros de atencion primaria del area del desastre, para evaluar su problematica emocional. Los trabajadores de atencion primaria (TAP) detectaron a los pacientes con trastornos emocionales, por medio del cuestionario de Auto-Reporte (CAR), que ha sido validado tanto en situaciones clinicas rutinarias como en situaciones de desastre. Se encontro una prevalencia de trastornos emocionales del 45%, segun los criterios del CAR, y del 20% segun el diagnostico del TAP. El TAP no identifico al 73.7% de los pacientes que de acuerdo con el CAR tenian un trastorno emocional. Estos hallazgos indican que la necesidad de las victimas de los desastres y de las comunidades afectadas, de recibir atencion psiquiatrica excede a los recursos con los que se cuenta. Estos hallazgos tambien indican que el TAP no esta capacitado para detectar estos casos. Este estudio es un importante aporte empirico para orientar al sector especializado que capacita al TAP para que pueda brindar servicios de salud mental a las victimas de desastres en los paises en desarrollo.