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The services boards system for the LHCb muon detector (equalization, timing and monitoring of the 120k front end channels in the LHCb muon detector)

Bocci, V.; Chiodi, G.; Iacoangeli, F.; Messi, F. LU ; Di Marco, S.; Nobrega, R.; Pinci, D.; Rinaldi, W. and Rossi, A. (2007) 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC In 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC 3. p.2134-2140
Abstract

The LHCb experiment, presently under construction at CERN (European Center for Nuclear Research) Large Hadron Collider (LHC), aims at the study of CP violation in the B meson sector. Its key elements will be a Muon detector which allows triggering and muon identification from inclusive b decays. The electronic system of the whole detector is very complex and its Muon detector Experiment Control System (ECS) allows monitoring and control of a number of Front-End boards in excess of 7000. The Services Board System is in charge of controlling Muon detector Front-End (FE) Electronics. It consists of 10 Crates of equipment (6Ü height); each crate contains two kinds of modules: a Pulse Distribution Module (PDM) and up to 20 Service Boards... (More)

The LHCb experiment, presently under construction at CERN (European Center for Nuclear Research) Large Hadron Collider (LHC), aims at the study of CP violation in the B meson sector. Its key elements will be a Muon detector which allows triggering and muon identification from inclusive b decays. The electronic system of the whole detector is very complex and its Muon detector Experiment Control System (ECS) allows monitoring and control of a number of Front-End boards in excess of 7000. The Services Board System is in charge of controlling Muon detector Front-End (FE) Electronics. It consists of 10 Crates of equipment (6Ü height); each crate contains two kinds of modules: a Pulse Distribution Module (PDM) and up to 20 Service Boards (SB) connected via a custom Backplane. The PDM module is used to generate and distribute a low jitter synchronous test pulse in a chosen phase relation with the LHC machine clock, for timing alignment of the detector FE, a 40 MHz clock signal synchronous with LHC operation , and it allows distribution of 4 CANbus branches as well as routing of special messages to each SB using a custom data bus available on its backplane. A Service Board makes possible monitoring and control of Front-End (FE) circuitry, as well as communication between front-end electronics and the external world. Four Embedded Local Monitor Board (ELMB) modules, based on an 8-bit microcontroller (Atmel ATMega128), running customized firmware are hosted by one SB; they allow communication via twelve serial links with Front-End cards and are able to communicate with each other using their on-board links. Each Service Board controls 96 FE boards or, in other words, 1536 channels. One Service Board crate contains up to 80 microcontrollers, which can adjust and monitor operation of up to 30720 FE Channels. This work depicts the hardware architecture of each module, up to a complete system overview, also covering in detail those aspects of electronics design of equipment functioning in a radiation environment.

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Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
in
2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
volume
3
pages
7 pages
conference name
2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
external identifiers
  • scopus:42149097385
ISBN
1424409233
9781424409235
DOI
10.1109/NSSMIC.2007.4436575
language
English
LU publication?
no
id
69d5401d-6533-44c9-b141-337714778406
date added to LUP
2016-11-18 18:51:07
date last changed
2017-01-01 08:40:07
@inproceedings{69d5401d-6533-44c9-b141-337714778406,
  abstract     = {<p>The LHCb experiment, presently under construction at CERN (European Center for Nuclear Research) Large Hadron Collider (LHC), aims at the study of CP violation in the B meson sector. Its key elements will be a Muon detector which allows triggering and muon identification from inclusive b decays. The electronic system of the whole detector is very complex and its Muon detector Experiment Control System (ECS) allows monitoring and control of a number of Front-End boards in excess of 7000. The Services Board System is in charge of controlling Muon detector Front-End (FE) Electronics. It consists of 10 Crates of equipment (6Ü height); each crate contains two kinds of modules: a Pulse Distribution Module (PDM) and up to 20 Service Boards (SB) connected via a custom Backplane. The PDM module is used to generate and distribute a low jitter synchronous test pulse in a chosen phase relation with the LHC machine clock, for timing alignment of the detector FE, a 40 MHz clock signal synchronous with LHC operation , and it allows distribution of 4 CANbus branches as well as routing of special messages to each SB using a custom data bus available on its backplane. A Service Board makes possible monitoring and control of Front-End (FE) circuitry, as well as communication between front-end electronics and the external world. Four Embedded Local Monitor Board (ELMB) modules, based on an 8-bit microcontroller (Atmel ATMega128), running customized firmware are hosted by one SB; they allow communication via twelve serial links with Front-End cards and are able to communicate with each other using their on-board links. Each Service Board controls 96 FE boards or, in other words, 1536 channels. One Service Board crate contains up to 80 microcontrollers, which can adjust and monitor operation of up to 30720 FE Channels. This work depicts the hardware architecture of each module, up to a complete system overview, also covering in detail those aspects of electronics design of equipment functioning in a radiation environment.</p>},
  author       = {Bocci, V. and Chiodi, G. and Iacoangeli, F. and Messi, F. and Di Marco, S. and Nobrega, R. and Pinci, D. and Rinaldi, W. and Rossi, A.},
  booktitle    = {2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC},
  isbn         = {1424409233},
  language     = {eng},
  pages        = {2134--2140},
  title        = {The services boards system for the LHCb muon detector (equalization, timing and monitoring of the 120k front end channels in the LHCb muon detector)},
  url          = {http://dx.doi.org/10.1109/NSSMIC.2007.4436575},
  volume       = {3},
  year         = {2007},
}