Results of on-line tests of the ENABLE prototype, a 2nd level trigger processor for the TRT of ATLAS/LHC
- Universitaet Mannheim (Germany)
- Universitaet Heidelberg (Germany)
The Enable Machine is a systolic 2nd level trigger processor for the transition radiation tracker (TRT) of ATLAS/LHC. The task of the processor is to find the best candidate for a lepton track in a high background of pions according to the EAST benchmark algorithm in less than 10 {mu}s. As described earlier, this is done in three steps. First all interesting tracks are histogrammed by accumulating for each track the coincidences between the track mask and the region-of-interest (RoI). Next the best defined track is identified. Eventually this track is classified as e or {pi}. A prototype has been developed and tested within the EAST/RD-11 collaboration at CERN. It operates at 50 MHz and finds up to 400 tracks in less than 10 {mu}s. It is assembled of an interface board and one or more histogrammer boards. The modular design makes the Enable Machine easily scalable. The histogrammer units are systolic arrays consisting of a matrix of 36 field programmable gate arrays. Through this it is possible to optimize the trigger algorithm, to adapt it to a changed detector setup, and even to implement completely new algorithms. For the beam tests in autumn 1993 at CERN the overall functionality within the detector environment could be shown. The authors were able to link successfully the Enable prototype to the detector raw data stream as well as to the data acquisition.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- OSTI ID:
- 54007
- Report Number(s):
- LBL-35822; CONF-940492-; ON: DE95004442; CNN: Grant 056MA52P; TRN: 95:012097
- Resource Relation:
- Conference: Meeting on computing in high-energy physics, San Francisco, CA (United States), 21-27 Apr 1994; Other Information: PBD: [1994]; Related Information: Is Part Of Proceedings of the conference on computing in high energy physics `94; Loken, S.C. [ed.]; PB: 532 p.
- Country of Publication:
- United States
- Language:
- English
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