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Management and control of the read out processors (TPPs) of the Aleph time projection chamber

1989; Institute of Electrical and Electronics Engineers; Volume: 36; Issue: 5 Linguagem: Inglês

10.1109/23.41083

1558-1578

S. R. Amendolia, T. Barczewski, L. A. T. Bauerdick, E. Blücher, W. Blum, J. Boudreau, D. Cinabro, M. A. Ciocci, J. Conway, D.F. Cowen, F. Fidecaro, S. Galeotti, B. Gobbo, A. Jahn, R. P. Johnson, M. Kasemann, A.W. Halley, S. J. Haywood, Ulf Larsson, B.W. LeClaire, I. Lehraus, B. Löfstedt, T. Lohse, A. Lusiani, P.S. Marrochesi, J. May, E. Milotti, A. Minten, F. Morsani, D. Passuello, J. Richstein, R. Richter, S. Roehn, G. Rolandi, D. Schlatter, M. Schmelling, R. Settles, G. Stefanini, F. Steeg, M. Takashima, W. Tejessy, J. Thomas, A. Vayaki, J. Wear, W. Witzeling, S. L. Wu, S. Xue,

Scientific Research and Discoveries

The readout of the Aleph time projection chamber (TPC) relies on a set of 72 time projection processors (TPPs), which are based on a Motorola 68020 microprocessor running a real-time operating system. The advanced processing capabilities of the TPPs allow them to perform in parallel a number of tasks, both during and outside of data acquisition, which are outlined. The management and control of such a large number of intelligent devices is presented. The discussion covers the hardware configuration of the TPPs; the software running the TPPs; their management, status, and control; exception handling and message logging; and the TPP monitoring tasks. >