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Home / Support & Services / LHC Deliveries: Success/Failure Statistics Report

LHC Deliveries Report updated up to 10/07/12

The Large Hadron Collider (LHC) is a world's largest particle accelerator and collider located at CERN, near Geneva, Switzerland. The LHC has begun operation in September 2008. Four experiments (CMS, ATLAS, LHCb, and ALICE) will run on the collider; each of them will study particle collisions from a different point of view, and with different technologies. CAEN is one of the main companies responsible for the design and manufacturing of electronics for such experiments.

This report - updated up to 10/07/2012 - contains the production results as a matter of success/failure functioning of all the electronics delivered to the LHC experiments that is nowadays reaching the considerable amount of 6215 units. In this report, CAEN shows the statistics related to the Failures, Repairs and Modifications (statistics derived from CAEN database 2004-2012) indicating the total number and the type of interventions carried out on the delivered units. Discerning among Real failures, No failures, Fine tuning. As an ISO 9001:2008 certified company CAEN would like to confirm to CERN and LHC that is committed to deliver top quality products as result of more than 30 years of experience in the field.
For more information please download the complete report updated up to 10/07/12

The statistics showed that in 4 years (from 01-01-2004 to 31-12-2007) the total percentage of interventions due to real failures is equal to:

  • On 4806 modules delivered we had 6,8 interventions every 100 modules
  • On ~16.700.000 installed components we had 14,1 interventions every million of components
  • On ~52.000.000 solder joints carried out we had 1,8 interventions every million of soldering

Notes
  • Real failures: Soldering problem (Cabling / Bad contacts), Component problems (Passive /Active)
  • No failures: Prototypes, No malfunctioning found, Not proper use, Upgrade Software, Upgrade Hardware
  • Fine tuning: (prototypes and pre-series debugging, normally on a limited number of devices): Ripple, Drift (V e/o I), Calibration, Mechanical problems, Software Bug Fixing, Hardware Bug Fixing, Other