Alice experiment Goal and method
tarix 01.08.2018 ölçüsü 445 b. #64791
Goal and method Detector Overview of the electronics: performance Select events containing pairs from J/ and decay Select events containing pairs from J/ and decay Reject events containing only low-pt background muons (mainly from and K decay) About 8 muons in trigger detector per central Pb-Pb collisions Cut on transverse momentum of muons: pt,cut (J/)=1 GeV/c pt,cut ()=2 GeV/c The FEE basically consists of a discriminator stage followed by a shaper , without amplification stage. The FEE basically consists of a discriminator stage followed by a shaper, without amplification stage. The output signal must have a width of about 20 ns, less than the LHC bunch crossing interval of 25 ns. specially designed Front–End Electronics Card based on a dual threshold technique to optimize the time resolution performance. The FEE basically consists of a discriminator stage followed by a shaper, without amplification stage. The FEE basically consists of a discriminator stage followed by a shaper, without amplification stage. specially designed Front–End Electronics Card based on a dual threshold technique to optimize the time resolution performance. BACKUP SLIDES Each strip is connected at one end to a resistive termination and to a FEE channel at the other end. Each strip is connected at one end to a resistive termination and to a FEE channel at the other end. The FEE basically consists of a discriminator stage followed by a shaper, without amplification stage. The output signal must have a width of about 20 ns, less than the LHC bunch crossing interval of 25 ns. The FEE signals are sent in differential mode to the local trigger electronics through cables about 15 m long. ADULT provides two main advantages When RPC is operated at voltages close to the efficiency knee, sometimes the streamer pulse is delayed with respect to the initial electron avalanche started by the passage of the ionizing particle This phenomenon determines a double peak in the time distribution of signals, which disappears by increasing the H.V. 3 levels : 3 levels : Local (x234) Régional (x16) Global Trigger latency < 700 ns (see budget time slide) The trigger participates in the ALICE L0 trigger Position on MT1 (Xpos) Position on MT1 (Xpos) Deviation (Xdev) Dostları ilə paylaş:
