Speaker
Raffaella Donghia
(LNF)
Description
As an alternative of the crystal choice for the Mu2e
calorimeter, we have tested single crystals of pure CsI in combination
with large area MPPC from Hamamatsu. The MPPC under consideration,
consisting of an array of 16 3$\times$ 3 mm$^2$ cells, 50 $\mu$m pixels,
grants an active area of 12$\times$12 mm$^2$ and has
an improved PDE reaching $\sim$ 40 \%
down to 250 nm thus well adapting to the emission spectra of these
crystals. We have measured the light yield, the
longitudinal response uniformity and the time
performances of CsI crystals procured from three different firms.
We have also determined their radiation hardness to a ionization
dose of up to 100 krad and to a neutron flux of up to 10$^{11}$ n/cm$^2$.
Primary author
Simona Giovannella
(LNF)
