Error handling for the CDF online silicon vertex tracker

Citation
M. Bari et al., Error handling for the CDF online silicon vertex tracker, IEEE NUCL S, 48(4), 2001, pp. 1286-1289
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Nuclear Emgineering
Journal title
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
ISSN journal
0018-9499 → ACNP
Volume
48
Issue
4
Year of publication
2001
Part
1
Pages
1286 - 1289
Database
ISI
SICI code
0018-9499(200108)48:4<1286:EHFTCO>2.0.ZU;2-O
Abstract
The online silicon vertex tracker (SVT) is composed of 104 VME 9U digital b oards (of eight different types). Since the data output from the SVT (few M B/s) are a small fraction of the input data (200 MB/s), it is extremely dif ficult to track possible internal errors by using only the output stream. F or this reason, several diagnostic tools have been implemented: local error registers, error bits propagated through the data streams, and the Spy Buf fer system. Data flowing through each input and output stream of every boar d are continuously copied to memory banks named Spy Buffers, which act as b uilt-in logic state analyzers hooked continuously to internal data streams. The contents of all buffers can be frozen at any time (e.g., on error dete ction) to take a snapshot of all data flowing through each SVT board. The S py Buffers are coordinated at system level by the Spy Control Board. The ar chitecture, design, and implementation of this system are described.