Speaker
Stefano Veneziano
(Istituto Nazionale di Fisica Nucleare Sezione di Roma 1)
Description
The ATLAS Level-1 Barrel system is devoted to identify muons crossing the two outer
Resistive Plate Chambers stations of the Barrel spectrometer, passing a set of
programmable pT thresholds, to find their position with a granularity of Delta EtaX
Delta Phi=0.1X0.1, and to associate them to a specific bunch crossing number. The
system sends this trigger information to the Central Trigger Processor within a fixed
latency of about one microsecond. The system is also responsible to record Resistive
Plate Detector hits, for monitoring purposes and to provide muon track position with
a spatial resolution of about 1 cm to higher level triggers and to refine precision
chambers' data. The system is hardware based but its high level of programmability
and its deployment in the cavern poses many requirements to its control data path.
The control system has to be reliable, it has to survive to an amount of radiation
comparable to space equipment, and has to connect to about 800 on-detector processor
destination boxes spread over a large area. The choice which has been implemented
uses a CANbus based system, with microcontroller-based destination nodes taking care
of initialize and control local devices accessible via JTAG, I2C and SPI local buses.
Sixty-four CAN chains of up to 16 nodes make up the LVL1 Barrel control system.
Configuration data is stored locally for fast initialization running in parallel over
all nodes. Linux-based PCs, integrated in the ATLAS TDAQ system, run initialization
and control applications reading configuration data from an Oracle database. A
detailed description of the hardware and software organization of the system is done,
with results from the setups used for chamber commissioning.
Primary author
Stefano Veneziano
(Istituto Nazionale di Fisica Nucleare Sezione di Roma 1)
Co-authors
A. Aloisio
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
A. Di Mattia
(INFN Roma and Università di Roma "La Sapienza)
A. DiCiaccio
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
A. DiSimone
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
A. Migliaccio
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
A. Nisati
(INFN Roma and Università di Roma "La Sapienza)
A. Rusu
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
A. Salamon
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
C. Luci
(INFN Roma and Università di Roma "La Sapienza)
C. Magureanu
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
C. Uroseviteanu
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
D. Bartos
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
D. De Pedis
(INFN Roma and Università di Roma "La Sapienza)
D. DellaVolpe
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
E. Brambilla
(Universita degli Studi di Lecce and INFN Lecce)
E. Gennari
(INFN Roma and Università di Roma "La Sapienza)
E. Gorini
(Universita degli Studi di Lecce and INFN Lecce)
E. Pasqualucci
(INFN Roma and Università di Roma "La Sapienza)
E. Petrolo
(INFN Roma and Università di Roma "La Sapienza)
F. Conventi
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
F. Grancagnolo
(Universita degli Studi di Lecce and INFN Lecce)
F. Pastore
(INFN Roma and Università di Roma "La Sapienza)
F. Spila
(INFN Roma and Università di Roma "La Sapienza)
G. Aielli
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
G. Carlino
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
G. Cataldi
(Universita degli Studi di Lecce and INFN Lecce)
G. Chiodi
(INFN Roma and Università di Roma "La Sapienza)
G. Sekhniaidze
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
L. Distante
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
L. Prodan
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
L. Zanello
(INFN Roma and Università di Roma "La Sapienza)
M. DellaPietra
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
M. Dogaru
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
M. G. Alviggi
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
M. Pectu
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
M. Primavera
(Universita degli Studi di Lecce and INFN Lecce)
P. Iengo
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
R. Cardarelli
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
R. DeAsmundis
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
R. Perrino
(Universita degli Studi di Lecce and INFN Lecce)
R. Santonico
(Universita degli Studi di Roma "Tor Vergata" and INFN Roma II)
R. Vari
(INFN Roma and Università di Roma "La Sapienza)
S. Buda
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
S. Constantin
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
S. Patricelli
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
S. Spagnolo
(Universita degli Studi di Lecce and INFN Lecce)
S. Veneziano
(INFN Roma and Università di Roma "La Sapienza)
V. Aprodu
(National Institute for Physics and Nuclear Engineering "Horia Hulubei", NIPNE-HH, Bucarest, Romania)
V. Bocci
(INFN Roma and Università di Roma "La Sapienza)
V. Canale
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
V. Izzo
(Universita degli Studi di Napoli "Federico II" and INFN Napoli)
