Author/Authors :
Antropov، نويسنده , , A.E and Fedotov، نويسنده , , A.V and Feofilov، نويسنده , , G.A and Izrailov، نويسنده , , E.K and Kasatkin، نويسنده , , V.A and Klempt، نويسنده , , W and Kolojvari، نويسنده , , A.A and Larin، نويسنده , , M.P and Lazarev، نويسنده , , V and Novikov، نويسنده , , I.A and Potapov، نويسنده , , S.V and Stolyarov، نويسنده , , O.I. and Tsimbal، نويسنده , , F.A and Tulina، نويسنده , , T.A and Valiev، نويسنده , , F.F and V، نويسنده ,
Abstract :
We present results of the technology, manufacturing and first tests of a novel MCP-based sector prototype for the forward multiplicity detector for the ALICE experiment at the LHC. The detector provides better than sqrt(M)/M resolution for high multiplicity events, and about 50 ps timing resolution. Two sector MCPs are mounted on a 200 μm ceramics board with the multipad readout integrated with a passive summator. The setup is baked under 300°C and then sealed into a thin wall (200 μm) stainless-steel vacuum sector chamber with a Ti getter keeping a vacuum of 10−5 Torr. A new technology of Al coating is applied in order to reduce the hydrogen leakage through the chamber walls. New multichannel ceramics feedthroughs were also developed for the signal readout and voltage supply. The results of the first in-lab and in-beam tests are discussed.
