CaloCube project
(“Call” Gruppo 5)
Trieste, consiglio di sezione INFN
11 luglio 2013
Participants
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Project name: CaloCube
Research area: Detectors
Scientific responsible (PI) of the project: Oscar Adriani
Local PI: Diego Cauz
Duration: 3 years
Participating research units
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INFN Sezione di Trieste and g.c. Udine
INFN Sezione di Pisa
INFN Sezione di Firenze
INFN Sezione di Pavia
INFN Sezione di Catania
Fondazione Bruno Kessler (FBK)
IMCB-CNR
2
Aim
• Construction of a calorimeter with an innovative
design with applications in
– Space Physics
• Future missions possibly interested: HERD, GAMMA-400
– High-Energy Physics
• to precisely measure the charge and the energy
of high energy nuclei and electrons
• to properly separate hadronic from
electromagnetic particles
3
Scientific goals
• Measurement of the energy spectrum of the
nuclear component of cosmic rays (CR) in the
region of the knee (E~1015 eV)
• Measurement of the electromagnetic
component of CR above the TeV region
• Establishing a proof of principle for
homogeneous, very fine hadronic energy
resolution calorimetry
• A first step for innovative calorimeters in
future collider experiments
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Design
• Highly isotropic and homogeneous
– High geometrical acceptance: detection capability for
particles from any space direction
– Minimize sampling fluctuations to increase energy
resolution
• Fine 3D sampling capability
– Crystal dimensions (3-5)3 cm3
– Exploit shower topology, e.g. distinguish between
e.m. and hadronic showers: high discriminating power
for hadrons/nuclei vs. electrons
– Optimize leakage corrections
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Design (cont’ed)
• High hadronic energy resolution through
compensation techniques
– 2% for electrons between 100 GeV and 1 TeV for
space physics
– 16% (for space physics) and 30%/sqrt(E) for HEP
– measurement of the em fraction via Cherenkov light
detection
– detection of evaporation neutrons from nuclei in the
had fraction
• Measurement of the particle’s charge (Z)
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Activity
• Construction and extensive tests of a reasonablesize prototype
• Optimization of design
• Choice of the active materials
• Selection of the optical sensors (e.g. large area,
low mass, high gain photodetectors (SiPMs))
• Optimization of the Cherenkov light collection
• Optimization of the neutron component
identification
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Activity (cont’ed)
• Tests on beam with
– highly ionizing low-energy nuclei
– high-energy electrons and hadrons
– @ CERN, FNAL, LNF, LNS facilities
• Development of software algorithms for event
reconstruction and performance optimization
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Milestones
O ptim i zati on of ge ometry an d
materi als
1^
sem
2^
sem
Ph ase 3 (C omplete fi nal
prototype )
Assembly and characterization in
laborat ory
Beam test at SPS
4^
sem
5^
sem
6^ sem
x
Ph ase 1 (Basi c syste m)
P rototype for scintillation light
readout with space qualified
techniques
Z syst em prot otype
Beam test at LNS and Cern
Ph ase 2 (System with multiple
readou t for Chere nkov an d
neutrons )
Optimization of the Cherenkov
light collection and test at BT FLNF
Optimization of the neutron
signals and test at LNS
3^ sem
x
x
x
x
x
x
x
Trieste/Udine group’s task
• Development and test of CASIS1.2B ASIC
– It is an evolution from the family of low-noise, widerange CASIS ASICs designed at INFN-Trieste
– Charge-sensitive dual-range preamplifier, with
automatic real-time gain control network
– 16 channels serially multiplexed onto a single analog
bus
– maximum dynamic range of 53 pC
– noise less than 2300 electrons
– A/D conversion integrated on-chip via a 12-bit ADC for
each channel
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Trieste/Udine group’s task (cont’ed)
• Design and construction of
– electronic boards and power control ASICs
– electronic boards for an FPGA-based data
acquisition
• Simulation activity to complement the work of
design and characterization of the detectors
– packages like Fluka and GEANT4 will be used
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Trieste/Udine group’s task (cont’ed)
• Quality control of existing materials
– transmittance, light yield, time response
– optimization of materials for scintillation,
Cherenkov and neutrons
– capability of distinguishing between Cerenkov and
scintillation signals
– bench tests with lasers and cosmics
– exposure to particle beams at FNAL
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Trieste/Udine group’s task (cont’ed)
• Simulation studies of performance
– with an emphasis on leakage corrections
• Development of photo-detector assemblies
• Calorimeter module
– construction and test
– analysis of test beam data
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Anagrafica e richieste
• Partecipanti Ts-Ud:
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Giovanni Pauletta 20%
Diego Cauz 20% (resp. loc.)
Anna Gregorio 20%
Valter Bonvicini 10%
Tot. 0.7 FTE
• Richieste ai servizi di sezione:
– Servizio elettronica e rivelatori 2 m.u.
• Test di SiPM e di elettronica di front-end
– Servizio officina meccanica 1 m.u.
• Assemblaggio rivelatori-cristalli
• Richieste finanziarie: in fase di definizione
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