1. 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

2. What has been done since JUNE 2014

3. 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

5. 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

6. 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 = cm3
Weight W = g
Single crystal
Number of crystals along the diameter 25
Total number of crystals
External Diameter cm
Total weight kg
Depth on the diameter λI
Geometrical factor m2 sr
Spherical calorimetric

7. The Spherical Calorimeter
Cubes

8. 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

9. 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

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

11. 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

12. 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….