Logo SuperBFTOF

  • R&D on the supply of Quartz pure ultras.
  • R&D reading of the Cherenkov light by means of SiPM
  • Design and realization of a muon detection telescope

Quartz en cosmique Test QuartzDSCF4271

Contact : Jean-François Muraz

190117 14h17 oz hyperlinkSuperB - FTOF homepage

190117 14h17 oz hyperlink SuperB experiment (Wikipedia)


noy

  • Photo-detectors characterization and tests.
  • Design, elaboration and on-siteimplementation for the whole atmospheric sparks detection.
  • Implementtation of 3G telemetry and temporary acquisition system.

Patrick Stassi: Photodetection - Telemetry

Marc Marton : Detector Design/CAD

Mohammed Chala : Detector Assembly

Christophe Bernard : Detector Assembly


Installing the first NOY stations (french) : LPSC INFO janvier 2011

Poster : NOY, Neutrino ObservatorY in Grenoble, A network project based on stand-alone Air shower detector arrays

ICRC 2010 proceeding :  NOY, a neutrino observatory network project based on stand alone air shower detector arrays

190117 14h17 oz hyperlinkNOY homepage


For the North site project of Pierre Auger Observatory (Colorado, USA), the SDI studied a new photo-detection device for tanks.

Indeed, the detectors of Auger surface shall be brought to operate continuously. The tanks are arranged outdoors, the photomultiplier (PM) and associated electronics are subject to significant climatic variations (0 to 50 ° C, humidity). In addition to insulation, it was recommended to use a sealed enclosure which contains the basis of PM and associated electronics.

This would allow all be in the form of a compact sensor unit facilitating repairs and control.

phd auger1phd auger2

Two systems are studied, based on a plastic conical body molded by shape close to that used at present on the South site to isolate the PM from the light. The first one contains a window of entry to Plexiglas that fits the photocathode surface.

The second leaves free this surface, but contains a double torique joint at the level of the collar of the PM. In both proposed solutions, the systems are closed by a metallic bottom to which will be fixed the electronics.

 

190117 14h17 oz hyperlink AUGER homepage


During the second half of 2008, SDI has supported the design and manufacturing of the calibration bench of the electromagnetic calorimeter supermodules of ALICE. This calibration bench is composed of 16 large scintillators (1.5 m), located above and below the detector, allowing signal and locate the cosmic muons passing through the detector.

phd alice1.jpg

In total, 14 supermodules were calibrated within the ARIANE hall at LPSC using this equipment with a dispersion of 2 to 3%, much lower than specified in the original specifications.

Contact : Jean-François Muraz

190117 14h17 oz hyperlink ALICE EMCAL homepage


The muon spectrometer is arranged in front of the ALICE detector and is composed, among others, of hadronic absorber and 10 plans of wire chambers grouped in 5 stations. The latter allow to reconstruct the muons trajectory, bent by electromagnetic field of a dipolar magnet. Because of possible distortions and movements undergone by the structures, an alignment measurement of these 10 trajectography chambers, in better than 50 µm in the tracks curvature direction, is absolutely necessary to reach an invariant mass resolution better than 1%.

The GMS (Geometry Monitoring System) will allow to measure this alignment. It is constituted of optical lines BCAM and PROX among whom the number and the position were determined by simulation.

To allow the validaion of these simulations, the geometrical reconstructions programs as well as to study the effects on the dispersal of the measurements due to a thermal gradient etc., the LPSC took in charge the study and the realization of a workbench representing the scale 1 half a chamber) of stations 6, 7, 8 of the spectrometer. Chambers are realized in aluminum profiles. They allow the binding, in 4 corners, of optical elements such as they will be fixed in the experiment ALICE. The central chamber bases on motorized tables which allow known values moves, which GMS has to find. The chamber 6 is equipped with a heating and breathtaking device allowing to study the thermal influence of the active zones of the detector on the resolution of the optical elements measurements.

SDI department took in charge :

  • The workbench technical coordination and realization.
  • The heating and breathtaking device study and the realization.
  • The study, the choice and the programming (LabVIEW) of 3 motorized tables.
  • The workbench assembly and the complete cabling.

The campaign of measurements, in which the department participated actively took place from January till June, 2006.

 

190117 14h02 oz download pdf Mehdi Meziane training report

190117 14h02 oz download pdf GMS Test Bench results (French)

 

Contact : Jean-François Muraz

 

190117 14h17 oz hyperlink ALICE at LPSC Grenoble

Ensemble2

 

 


gms


Within the framework of the educational activity towards high schools (ECRINS), the SDI developed two compact detection of cosmic rays devices baptized " Mini ECRINS ". These systems are constituted each of both plastic scintillateurs, associated to two photomultipliers supplied by batteries. The acquisition of the signals is permformed by a mini oscilloscope USB (PicoScope®) piloted by a LabVIEW dedicated program . If we use a laptop computer, these devices become completely autonomous and transportable in an appropriate suitcase.

These devices are realizations of the SDI, not only due to their design and their manufacturing, but also due to their use within the framework of educational activities in 2007 as the physics exposition at St Ambroise High School of Chambéry and Physics Olympiads at Pierre and Marie Curie High School of Grenoble in 2007.

phd ecrin1phd ecrin2

190117 14h17 oz hyperlink ECRINS homepage