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The Tore Supra Data Acquisition System was completely redesigned in 1996, for plasma control and long pulse operation. It is now based on the Rtworks package which provides all the software basic modules to build a distributed on-line system, from data acquisition level up to run control and data display. In the same time, the real-time plasma control system has been improved with several control units upgraded with VME hardware and PowerPC processors interconnected through a fast shared memory network.

In order to support the heat-load of a continuous high power plasma, the upgrade of the first wall of the TORE SUPRA tokamak is now in progress and the first pulses are expected by July 2001. The TORE SUPRA acquisition system, originally conceived for long pulse data acquisition and processing, needs some improvements to meet new requirements such as fast and continuous data access, real time data processing where possible, more efficient post-pulse data processing.

In operation since 1988, the Tore Supra data acquisition system provides continuous data taking, storage and displays. But several limitations are observed, as the weak errors management, the performances of data transfer and of feedback control. The tied proprietary operating systems and as outcome, the lack of processors evolution prevent from upgrading the original system. So, the data acquisition system has been completely re-engineered aiming long pulse operations. It is based on a commercial package which provides all the basic modules to build a distributed on-line software from the data acquisition level up to the run control and data display. The continuous operation requests a few enhancements we explore in the last part.

The TORE SUPRA tokamak experiment was designed with a real-time acquisition system yielding a dense and continuous flow of data (about 15 Megabytes per shot). Very early on, physicists required tools allowing fast access, analysis, and visualization of these data. This paper will outline the hardware architecture along with the various software components which were developed and integrated to meet these needs.

A 50 m long magnetized iron torus enclosing a 40 m long target provides the luminosity and acceptance necessary for the study of deep inelastic muon scattering at high Q 2 . The construction and performance of this spectrometer and the associated trigger are described. Details of the data acquisition system and data analysis are also given.

An apparatus consisting of two magnetic spectrometers has been constructed at the CERN Proton Synchrotron (PS) in a missing-mass experiment to identify and select the beam particle and the outgoing one, and to measure their momenta. This paper gives details of the two spectrometers, which are comprised of multiwire proportional chambers, high resolution time-of-flight counters, and aerogel and water Cherenkov detectors.

A large toroidal iron spectrometer for the study of deep-inelastic muon scattering at the CERN SPS has been upgraded to extend the accessible kinematic range and to reduce the systematic errors on absolute cross-section measurements. The layout of the improved apparatus, the construction of new detectors and associated electronics, and the structure of a new data-acquisition system are described in detail.

The TORE SUPRA experiment (long duration plasma), needs a computer architecture, to allow data taking and real time processing in an efficient way. This paper describes this unconventionnal hardware architecture and the corresponding data acquisition system.