A simulation study for a Forward Calorimeter upgrade plan in ALICE at LHC
Abstract
We plan to install a Forward Calorimeter(FoCAL) in η=1 4 region of the ALICE experiment at LHC. A main subject is the search for signatures of small-x parton saturation effects, which is recently discussed from the point of Color Glass Condensate(CGC). It also enables to study long range hadron correlations like ``Ridge'' found in the AuAu collision at RHIC. The basic measurements are 0̂ and direct γ spectrums in p+p, p+A, and A+A collisions. Since two γ from a high momentum 0̂ decays are merged into a same cluster, 0̂/γ separation at high momentum is a challenging task. The measurement of single electron from heavy quarks and W boson is also possible in p+p,p+A collisions. A SiW Tracking Calorimeter can be the solution to theses requirements. It is a sampling calorimeter which measures a presice lateral and longitudinal shower shape by a set of silicon sensors. A tungsten is a good choice for absorber material because of its short radiation length and excellent ratio of radiation and absorption lengths. A simulation study for possible physics will be presented. And then the conceputual design of FpCal and its performance study by a GEANT simulation and a beamtest of PHENIX Forward Calorimeter protoype will be also presented.
- Publication:
-
APS Meeting Abstracts
- Pub Date:
- October 2009
- Bibcode:
- 2009APS..HAW.EC010H