2^ CaloCube meeting Firenze, 20 Febbraio 2015 Oscar Adriani Calocube Sviluppo di calorimetria omogenea ad alta accettanza per esperimenti di Raggi Cosmici nello spazio 2^ CaloCube meeting Firenze, 20 Febbraio 2015 Oscar Adriani

What has been done since JUNE 2014

Theoretical studies and simulation Intense study of optical materials to optimize the Cherenkov light collections by Florence and Milan We bought many different crystals, that need to be tested Big simulation work: Energy resolution for many different materials See Talks by N. Daddi Studies on alternative geometries by P. Papini I will present now few slides

A more exotic solution Basic ideas: Spherical configuration with small crystals with truncated octahedron shape More complex from the mechanical point of view Cubic configuration with small size cubic crystal Simpler from the mechanical point of view Basic ideas: Reduce as much as possible the leakages by avoiding possible escape planes Spherical geometry to increase the acceptance (maximize the surface, and hence the GF, once the weight is fixed) Optimization criteria: Crystals dimensions Gap btw crystals to increase the acceptance

a gap l Size of the red square a = 1.2 cm Size of the yellow cubic envelope l = √2 × 2 × a = 3.4 cm Gap gap = 0.8 cm Volume V = 8 × √2 × a3 = 19.55 cm3 Weight W = 139.4 g Single crystal Number of crystals along the diameter 25 Total number of crystals 14361 External Diameter 103.6 cm Total weight 2002 kg Depth on the diameter 3.75 λI Geometrical factor 10.6 m2 sr Spherical calorimetric

The Spherical Calorimeter Cubes

Very intense laboratory activities Test in Naples on the CsI(Tl)surface treatments See talk by G. Carotenuto/R. D’Alessandro Production and tests of dichroic filters in Catania See talk by S. Albergo Measurements in Florence for: Detailed Characterization of the Casis chip See talk by L. Pacini Light collection efficiency (Vikuiti OK, Labsphere 6080 Not ok!!!!) Optical cross talk (killed by Tevlar ;) Activity in Trieste on the new CASIS chip See talk by V. Bonvicini

Mechanical studies Pisa/Siena group has studied the mechanics and we placed a big order for: FEM model and simulation 2 small (6x6) carbon fiber prototype planes 1 large (28x28) carbon fiber plane See talk by A. Basti

Calibration system Pulsed light calibration system is under study by the PV group See talk by P. Cattaneo

Test beams Intense analysis work on the past test beams analysis See talk by E. Vannuccini for SPS See talk by S. Albergo for BTF Organization of future test beams Setup of the Messina Linac line See talk by A. Trifiro’ Parasitic Test beam in H8 Ion Beam next week Official SPS test beam on H2 line (electrons and protons) from 15 up to 22 July See Talk by S. Albergo

Still to do Continue the work already described Increase the size of the prototype We bought xxx crystals at the end of 2014 Optical studies of the new type crystals Milan/Naples SiC tests and prototyping P. Lenzi got the CSN5 INFN grant for this! He will work on SiC in strict collaboration with CT Studies and prototype of Charge Identifier System Aerogel blocks look promising….