Title of article
Improvement of several properties of lead tungstate crystals with different doping ions
Author/Authors
Auffray، نويسنده , , E and Lecoq، نويسنده , , P and Korzhik، نويسنده , , M and Annenkov، نويسنده , , A and Jarolimek، نويسنده , , O and Nikl، نويسنده , , M and Baccaro، نويسنده , , S and Cecilia، نويسنده , , A and Diemoz، نويسنده , , M and Dafinei، نويسنده , , I، نويسنده ,
Pages
10
From page
75
To page
84
Abstract
A very good radiation resistance of lead tungstate crystals is mandatory for their use in the high-precision electromagnetic calorimeter of the CMS experiment at LHC. Since the beginning of 1996 we have organised systematic investigations of the parameters influencing the radiation hardness of this crystal. Two classes of parameters have been particularly studied, the first one related to the control of the stoichiometry and structure-associated defects, the second one connected with the suppression and the charge compensation of existing defects with different kinds of doping ions. This paper reports about the second part of this study and complements a first paper where the role of the stoichiometry was already discussed. Results of tests are given on a significant statistical sample of full size crystals (23 cm) which show a considerable improvement in the optical properties and the radiation resistance of appropriately doped crystals.
Journal title
Astroparticle Physics
Record number
2003436
Link To Document