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  The KLOE calorimeter consists of three parts: one barrel and two endcaps. Each part is built out of modules with a spaghetti structure made of lead layers with about 1,2 mm thickness (200 layers per 1 module) which are filled with scintillating fibers of 1 mm diameter. The barrel (Fig. 1) has a cilindrical shape and is divided into 24 modules with trapezoid shape. Each module is 23 cm thick.

Figure 1: A photo of the KLOE calorimeter [1]. The 24 modules of the barrel and the inner plane of the endcap are shown.

The volume of the calorimeter consists of 50% fiber, 40% lead and 10% glue. The section of one of the 24 modules and the details of the lead+fiber structure can be aprreciated in Fig. 2. The detailed structure of the module has been simulated as described in the following section.

Figure 2: Single module section (left) and details of the fibers structure in the calorimeter detector (right).

Giuseppe Battistoni; INFN, Milano
Jaroslaw Zdebik; UJ, Cracow

Last updated: 26th of October, 2010