[en] The Tevatron collider experiments collected data from 1992 to 1995. CP violation related measurements have been produced with this sample achieving results which clearly state CDF and DOeability in extracting significant CKM information from p - p-bar collisions. The most up to date results and future plans for both experiments are discussed in this paper

[en] The renewed CDF II experiment recently re-started data taking. The data collected lately already provides insight in the heavy flavor capabilities of this pp-bar experiment. As a benchmark of these possibilities we present two preliminary results: the measurement of the branching fractions BR (D deg. → π⁺π^-) and BR(D deg. → K⁺K^-) relative to BR (D deg. → K^±π^±) and the measurement of the invariant mass difference between D_s^± → phiπ^±, phi → K⁺K^- and D^± → phiπ^±, phi → K⁺K^- The preliminary results are ((BR(D⁰ → π⁺π^-))/(BR(D⁰ → π^±pi;^-+)) = 3.37 ± 0.20 (stat) ± 0.16 (sys)%, ((BR(D⁰ → K⁺K^-))/(BR(D⁰ → K^±pi;^-+)) = 11.17 ± 0.48 (stat) ± 0.98 (sys)% and Δm (D_s - D⁺) = 99.28 ± 0.43 (stat) ± 0.27 (sys) MeV/c². All results are consistent with PDG expectations

[en] Real time pattern recognition is becoming a key issue in many position sensitive detector applications. The CDF collaboration is building SVT: a specialized electronic device designed to perform real time track reconstruction using the silicon vertex detector (SVX II). This will strongly improve the CDF capability of triggering on events containing b quarks, usually characterized by the presence of a secondary vertex. SVT is designed to reconstruct in real time charged particles trajectories using data coming from the Silicon Vertex detector and the Central Outer Tracker drift chamber. The SVT architecture and algorithm have been specially tuned to minimize processing time without degrading parameter resolution

No abstract available

[en] Phase separation of quenched supersaturated Ni-(9.5-12.0) at.% Ti single crystals was followed by small-angle neutron scattering during in-beam aging at 773, 813 and 853 K. With the incident beam along left-angle 110 right-angle, scattering maxima in <100> directions were observed from the earliest stages of decomposition. While the results obtained at 773 K may be compatible with the general features of spinodal decomposition, a two-phase model with homogeneous precipitation in a depleted matrix is more appropriate at 813 and 853 K. Though scaling may be shown to hold, the aging kinetics is considerable slower than expected, which is related to a stabilizing effect of elastic coherency stresses

[en] This paper describes recent progress in the development of Nb₃Sn wires in Switzerland using the internal tin method. The work was carried out in close collaboration between the Fusion Technology Division of CRPP and Swissmetal, with the emphasis on conductors suitable for fusion magnets. The manufacturing process is based on the tubular extrusion of a niobium-copper composite, followed by the cold working of the composite containing a tin core. 19 Nb-Cu-Sn subelements were assembled inside a tantalum diffusion barrier and a copper can and subsequently reduced to wire size by swaging and drawing. The intention was to obtain nonreacted filament sizes of typically 3microm in 0.8--1 mm wires. The evolution of the design and the manufacturing process are discussed. Experience gained with model conductors has been used to guide the design. The strands have been evaluated with respect to electrical and mechanical properties. In particular, critical current densities in the non-copper area exceeding 750 A/mm² at 12T and 4.2K have been achieved

[en] Swissmetal recently completed a contract to manufacture 200 m of NbTi cable-in-conduit prototype conductor to be used in the Wendelstein 7-X superconducting magnet system. The conductor consists of a 192 strand, four stage NbTi cable in an aluminium alloy jacket cooled by forced flow helium. It will operate at 16 kA, 3.8K and 6.2 T. To qualify this conductor electrical tests were performed on a 3.6 m long full-size specimen in the SULTAN test facility at CRPP. In preparation for these tests two conductor terminations and one electrical joint were manufactured in a relatively simple and, therefore, time and cost saving way. This paper presents the test results of critical current measurements performed on the conductor as well as of extracted strands in background fields of up to 8 T. The joint will be described and its resistance will be reported. In addition the results of pressure drop measurements at room temperature are presented

[en] Real time pattern recognition is becoming a key issue in many position sensitive detector applications. The CDF collaboration is building SVT: a specialized electronic device designed to perform real time track reconstruction using the Silicon VerteX detector (SVX II). This will strongly improve the CDF capability of triggering on events containing b quarks, usually characterized by the presence of a secondary vertex. SVT is designed to reconstruct in real time charged particles trajectories using data coming from the silicon vertex detector and the central outer tracker drift chamber. The SVT architecture and algorithm have been specially tuned to minimize processing time without degrading parameter resolution

[en] The Silicon Vertex Tracker (SVT), currently being built for the CDF II experiment, is a hardware device that reconstructs 2-D tracks online using measurements from the Silicon Vertex Detector (SVXII) and the Central Outer Tracker (COT). The precise measurement of the impact parameter of the SVT tracks will allow, for the first time in a hadron collider environment, to trigger on events containing B hadrons that are very important for many studies, such as CP violation in the b sector and searching for new heavy particles decaying to bb-bar. In this report we describe the overall architecture, algorithms and the hardware implementation of the SVT

[en] The CDF Online Silicon Vertex Tracker (SVT) reconstructs 2D tracks by linking hit positions measured by the Silicon Vertex Detector to the Central Outer Chamber tracks found by the eXtremely Fast Tracker (XFT). The system has been completely built and assembled and it is now being commissioned using the first CDF run II data. The precision measurement of the track impact parameter will allow triggering on B hadron decay vertices and thus investigating important areas in the B sector, like CP violation and B_s mixing. In this paper we briefly review the architecture and the tracking algorithms implemented in the SVT and we report on the performance of the system achieved in the early phase of CDF run II