Author/Authors :
V. Bitsadze، نويسنده , , G. and Brekhovskikh، نويسنده , , V. M. Kuptsov، نويسنده , , A. and Lapshin، نويسنده , , V. and Rykalin، نويسنده , , V. and Tauscher، نويسنده , , L. and Zhabitsky، نويسنده , , M.، نويسنده ,
Abstract :
The ionisation hodoscope (IH) of the DIRAC (PS 212) experiment at CERN is optimised to separate ionisation signals produced by otherwise unresolved double tracks from ionisation signals produced by a single particle. While its total thickness is only 1.5% of a radiation length, it consists of four planes and provides two measurements of ionisation loss in each of the two projections. It suppresses the background from single-track events by a factor 50 while keeping more than 80% of double-track events. The IH design and performance during data taking in 2001–2003 are described.
