Speaker
Katsushige Kotera
(Shinshu University)
Description
The CALICE collaboration is developing a granular electromagnetic calorimeter using (5-10) x 45 x 3 mm^3 plastic scintillator strips for a future linear collider experiment. A prototype module has been constructed and tested at Fermilab in 2008 and 2009. It has 2160 scintillator strips and each of them is read out by using a Pixelated Photon Detector (PPD). The experiment in 2009 was held in the temperature condition from 19 to 27 degrees of Celsius. The response to the muon beams as the minimum ionization particles was investigated in this large temperature fluctuation to make a comprehensive temperature correction method. Additionally, the sensitivity to a few photons from LED light also investigated to separately discuss the temperature dependence of PPD response.
The temperature correction established by using the results of these study improves the linear behavior of response to the electron beams from 2 GeV to 32 GeV. The deviation of the measured response from a linear behavior is reduced from greater than 10% to less than 1.5%. The energy resolution is also improved.
Author
Katsushige Kotera
(Shinshu University)
