Author/Authors :
Uiterwijk، نويسنده , , J.W.E and van Beuzekom، نويسنده , , M.G and van Dantzig، نويسنده , , R and van der Graaf، نويسنده , , H and de Jong، نويسنده , , M and Kok، نويسنده , , J.W and Konijn، نويسنده , , J and Litmaath، نويسنده , , M.F and Metselaar، نويسنده , , J.P.M and Oldeman، نويسنده , , R.G.C and Panman، نويسنده , , J and van der Poel، نويسنده , , C.J.A.F and Visschers، نويسنده , , J.L، نويسنده ,
Abstract :
The CHORUS experiment searches for νμ↔ντ oscillation. To aid in the momentum reconstruction of charged hadrons, a honeycomb tracker was built with three orientations of six planes each. The planes are manufactured by point-welding together two precision folded conductive polycarbonate foils, forming hexagonal tubes with 30 μm thick anode wires in the center.
neycomb tracker in CHORUS is read out using a bitstream principle. The amplified signal of each wire is binary sampled every 5 ns and stored in a 256 bit circular buffer, implemented in dual-port memories. This technique allows a full reconstruction of a 1.28 μs history of each wire. Eighteen cards, each handling 72 wires, are read out over a single flat cable using a card-to-card pipeline.
