论文信息 - The on-line computational and control system for the 4/spl pi/-detector CHIMERA

The on-line computational and control system for the 4/spl pi/-detector CHIMERA

A commercial two-DSP-based board is the basic unit of the on-line computational and control system under development for the multidetector CHIMERA. The system design includes a small scale parallel and distributed architecture of PCs, used as both host and user and network interface, and of DSP boards, up to three for each host. The system is able to accomplish the on-beam control of CHIMERA, by means of the on-line computation of special algorithms, instead of using the usual techniques of special pulses to be sent off-beam. The physical data, collected and organized in UDP-packets by the data acquisition system, are read through a 10 Mbit/s Ethernet network. The PC-software, running under Windows NT 4.0, is based on threads and assures the communication and program managing and the result presentation. The DSP-software written in C++ takes care of the communication with the PC and of the computation. The preliminary on beam results for the first three wheels (about 100 telescopes), obtained employing two bi-processor boards located in the PCI-bus of a Pentium MMX PC are also presented.

[1] R. Laforest,et al. The mass dependence of CsI(Tl) scintillation response to heavy ions , 1992 .

[2] M. D'Agostino,et al. Calibration of CsI(Tl) scintillators for heavy ions (3⩽Z⩽54) in a wide energy range (Eu⩽60MeV/u) , 1994 .

[3] A. Anzalone,et al. Detector array control and triggering , 1998 .

[4] G. Cardella,et al. The data acquisition and control system for the 4/spl pi/ detector CHIMERA , 1998 .

[5] Andrea Rapisarda,et al. Chimera: a project of a 4π detector for heavy ion reactions studies at intermediate energy , 1995 .

[6] Algirdas Avizienis,et al. Toward Systematic Design of Fault-Tolerant Systems , 1997, Computer.

[7] Fred S. Goulding,et al. Identification of Nuclear Particles , 1975 .

[8] H. Kopetz,et al. The Evolution of Fault-Tolerant Computing , 1987, Dependable Computing and Fault-Tolerant Systems.

[9] M. Bartolucci,et al. The enhanced data acquisition system for the 4/spl pi/ detector CHIMERA , 1999, 1999 IEEE Conference on Real-Time Computer Applications in Nuclear Particle and Plasma Physics. 11th IEEE NPSS Real Time Conference. Conference Record (Cat. No.99EX295).