Hellenic Contribution to the LHC Hardware Commissioning. Rachel-Maria Avramidou On behalf of the Hellenic Team. The team. 1 physicist (PhD), 1 computer scientist, 3 computer engineers, 7 electronics engineers. Introduction to LHC. Basic layout
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On behalf of the Hellenic Team
1 physicist (PhD), 1 computer scientist, 3 computer engineers, 7 electronics engineers
8 sectors (~3.3 km): arcs and straight sections (~528 m)
P1: ATLAS detector
P2: ALICE detector
P3: Collimation system to capture off-momentum particles
P4: Radio Frequency superconducting acceleration cavities (400 MHz)
P5: CMS detector
P6: Beam abort systems for the beams to be extracted safely and deposited onto external dump (absorb the stored energy)
P7: Collimation systemto control the beam halo
P8: LHCb detector
Two-ring superconducting pp collider of 27 km circumference
The dipoles must operate at 8.3 T and be cooled in superfluid helium at 1.9K
Instrumentation crates (~800) are being installed and connected to the LHC. They contain electronic cards that measure temperature, pressure and cryogenic liquid level.
This Test Bench consisted of a means of debugging the pre-series designs of the electronics in order to conclude to their final models that went to mass production.
Examples of problems: not connected and wrongly connected cables (machine side), blown fuses, bad cables, broken connectors, missing connections
Installation, configuration, initialization and troubleshooting of the electronics units
Profibus DP/PA couplers
Drawers with intelligent valve positionners
Provides the measurements from the cryogenics instrumentation (Temperature, Pressure, Level and QV, PV valves). Gives orders to the heater actuators coming from the control system PLC and commands to protect the Level measurements electronics
Provide all the info coming from the signal conditioners/electronic boards to the cryogenics experts by means of an expert tool based on PVSS
The webpage was developed during summer 2006 by A.Koumparos as a mean to offer some information to the public about our contribution to the LHC and the other experiments.
All valves in alcoves accessed through Profibus
All tunnel instruments accessed through WorldFip