Author/Authors :
Bagdasarov، نويسنده , , S.L. and Cox، نويسنده , , P.T. and Demortier، نويسنده , , L. and Giokaris، نويسنده , , N.D. and Khazins، نويسنده , , D.M and Anderson، نويسنده , , D.F. and Zimmerman، نويسنده , , J. and Budagov، نويسنده , , J.A. and Romanov، نويسنده , , V.M. and Morgan، نويسنده , , M.، نويسنده ,
Abstract :
An electromagnetic (EM) calorimeter constructed from high-pressure gas-ionization tubes with sinusoid-like longitudinal profile (wiggler tubes) has been assembled, and tested in an electron beam at the CERN SPS. This design greatly improves the EM energy resolution compared to a calorimeter constructed from straight tubes and eliminates the resolution dependence on the beam angle. An EM energy resolution of δE/E (32.0 ± 1.6)% / √E ⊕ (2.9 ± 0.3)% has been achieved. Further improvements of the EM energy resolution are discussed. The calorimeter is very radiation hard, has a fast response, and it is stable and mechanically robust; it is intended for the forward region of the LHC collider detectors.
