[en] Based on the Motorola 6800, this multiplexer is designed to provide a microprocessor development tool in the specific environment of a high energy physics laboratory. The basic philosophy of this device is to allow communication of a target (prototype) processor with a host computer under control of a human operator. The host can be an experimental on-line computer or any remote machine with a time-sharing network. It is thus possible to speed up design and debugging of a physics application program by taking advantage of the sophisticated resources usually available in a computer centre (powerful editor, large disk space, source management via ''Patchy'' etc...). In addition to the classical cross-macroassembler, a loader is available on the host for down-line loading binary code, via the multiplexer, into the prototype memory. Such a scheme is easiextended to the communication of any host interactive processing program with a data acquisition microprocessor, and provides the latter with a convenient and easily portable extension of its computing power. A typical application of this mode is described in a separate paper

[en] In H.E.P., it is common practice to test and calibrate equipment at different stages (design, construction checks, setting up and running periods) with a dedicated mini or micro-computer (such as CERN CAVIAR). An alternative solution has been developed in which such tasks are split between a microprocessor (Motorola 6800), and a host computer; this allows an easy and cheap multiplication, of independant testing set-ups. The local processor is limited to CAMAC data acquisition, histogramming and simple processing, but its computing power is enhanced by a connection to a host time-sharing system via a NUMM multiplexor described in a separate paper. It is thus possible to perform sophisticated computations (fits etc...) and to use the host disk space to store calibration results for later use. In spite of the use of assembly langage, a software structure has been devised to ease the constitution of an application program. This is achieved by the interplay of three levels of facilities: macro-instructions, library of subroutines, and Patchy controlled pieces of programs. A comprehensive collection of these is kept in the form of PAM file on the host computer. This system has been used to test calorimeter modules for the UA 1 experiment

[en] In H.E.P., it is common practice to test and calibrate equipment at different stages (design, construction checks, setting up and running periods) with a dedicated mini or micro-computer (such as CERN CAVIAR). An alternative solution has been developed in which such tasks are split between a microprocessor (Motorola 6800), and a host computer; this allows an easy and cheap multiplication of independant testing set-ups. The local processor is limited to CAMAC data acquisition, histogramming and simple processing, but its computing power is enhanced by a connection to a host time-sharing system via a MUMM multiplexor described in a separate paper. It is thus possible to perform sophisticated computations (fits etc...) and to use the host disk space to store calibration results for later use. In spite of the use of assembly language, a software structure has been devised to ease the constitution of an application program. This is achieved by the interplay of three levels of facilities: macro-instructions, library of subroutines, and Patchy controlled pieces of programs. A comprehensive collection of these is kept in the form of PAM files on the host computer. This system has been used to test calorimeter modules for the UA 1 experiment. (orig.)

[en] Based on the Motorola 6800, this multiplexer is designed to provide a microprocessor development tool in the specific environment of a high energy physics laboratory. The basic philosophy of this device is to allow communication of a target (prototype) processor with a host computer under control of a human operator. The host can be an experimental on-line computer or any remote machine with a time-sharing network. It is thus possible to speed up design and debugging of a physics application program by taking advantage of the sophisticated resources usually available in a computer centre (powerful editor, large disk space, source management via 'Patchy' etc...). In addition to the classical cross-macroassembler, a loader is available on the host for down-line loading binary code, via the multiplexer, into the prototype memory. Such a scheme is easily extended to the communication of any host interactive processing program with a data acquisition microprocessor, and provides the latter with a convenient and easily portable extension of its computing power. A typical application of this mode is described in a separate paper. (orig.)

[en] The Omega spectrometer has been utilised for experiments with relativistic heavy ion collisions. With the aid of the WA97 experiment (lead-lead at 167 GeV/c per nucleon) data were accumulated during three periods and almost 300 millions of triggers being recorded. To study the quark-gluon plasma (QGP) we have utilised the analysis of the strange particles and the following results were obtained for the ratios of the production rates: 0.54 ± 0.13 for Ωbar/Ω and 0.16 ± 0.1 for (Ω + Ωbar)/(Ξ + Ξ-bar). In order that the anti-strange/strange ratio be the presence signature of the quark-gluon plasma it must reach a value of the order of unity. The results of the West Hall and North Hall experiments gave hints in favor of QGP. However, these hints are not formally solid even for the lead beam at 160 GeV/nucleon. Work developed for the program of the data acquisition as well as for the particle track reconstruction are also mentioned

No abstract available

[en] We analyze data taken using a test bench with a prototype pad chamber designed to work in a high multiplicity environment. For this purpose we use the nonlinear methods presented in a previous paper. We show that the results which can be inferred from our simulation studies are well reproduced by real data. We also show that a global accuracy of 100 μm ( similar eq2% of the pad size) can easily be achieved. The influence of the pad spacing is studied and a way to account for it is proposed. We also discuss the quality of individual errors which can be computed on an event by event basis and show that they can be of the order of 20 to 50 μm (∼0.5-1% of the pad size). Methods which deal with ADC saturation effects are also illustrated. ((orig.))