[en] We have searched for evidence of supersymmetry with the Collider Detector at Fermilab using trilepton events in p anti p collisions at √s = 1.8 TeV. In the Minimal Supersymmetric Standard Model (MSSM), we expect trilepton events from chargino-neutralino (ξ^±₁ξ⁰₂) pair production, with subsequent decay into leptons. In all possible combinations of electron and muon channels, we observe no candidate events in 107 pb^-1 of data. We present limits on chargino and neutralino production within the framework of a supergravity inspired MSSM: σ_ξ^±1ξ⁰2 · BR(ξ^±₁ξ⁰₂ → 3l + X) < 0.34 pb and M_ξ^±1 > 81.5 GeV/c² for tan β = 2, μ = -600 GeV/c² and M_q = M_g. We also present limits on a SU(5) x U(1) supergravity model and a 4 and 1/2 parameter Minimal SUGRA model

[en] We report on the development and test of a fast three-dimensional Track-Finder for the Level-1 trigger of the CMS endcap muon system. System tests included four types of custom circuit boards clocked at 40 MHz, optical links, and a high-speed custom auxiliary backplane in a VME crate. The hardware results, calculated using field-programmable gate arrays, programmable logic devices, and memory lookup tables, agreed bit-for-bit with software simulations for both random patterns and realistic tracks

[en] Presented are the main design features of the large Cathode Strip Chambers (CSCs) for the CMS Endcap Muon System as well as the performance results obtained with the two full-scale 3.4x1.5 m² six-plane prototypes. The prototype performance was within the baseline requirements: (a) higher than 99% efficiency of muon track finding at the trigger level with more than 92% probability for bunch crossing identification and better than 2 mm spatial resolution, and (b) better than 150 μm spatial resolution in off-line

[en] Presented are the main design features and performance results of the Cathode Strip Chambers for the CMS Endcap Muon system. Although the strips are unusually wide (up to 16 mm) for the cathode-to-anode wire distance of 5 mm, the six-plane structure of these chambers yields a spatial resolution of about 80 μm, essentially uniform and independent of the strip width. In addition, the net spatial resolution of about one-tenth of the strip width at the hardware trigger level (300 ns) is obtained using a simple network of comparators. Time resolution achieved at the trigger level is ∼4 ns (rms) that allows unambiguous tagging of bunch crossings which occur every 25 ns. Aging test results, including those obtained with a recirculating gas system, are discussed; only minor aging affects were observed. The aging studies were performed with large-scale chambers; 700 m of wire were irradiated for a dose up to 0.4 C/cm of the total accumulated charge