1 / 20

LHC Collimator Survey Train

This concept involves a remote-controlled survey train for precise collimator alignment in the Large Hadron Collider, aiming to enhance safety and operational efficiency by reducing personnel exposure to radiation.

gregs
Download Presentation

LHC Collimator Survey Train

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LHC Collimator Survey Train Concept / Development / Status Remote Controlled Measurements in the LHC Patrick Bestmann CERN BE/ABP/SU IWAA2010 14/09/2010

  2. Overview

  3. Motivation • Remanent dose rate map between D4 and Q5 after 180 days of continious operation with one month of cooling time

  4. Motivation • Significant activation of material by the beam cleaning process in Point 3 and 7 • High Dose rates for peronnel in Place (4mSv/h) • 500m of Beamline concerned at Point 7 • 26 Quadrupoles and 37 Collimators • Conventionalmeasurements ~90h • Control of the Collimator Alignmentusing a remote controlled system

  5. Task definition • Control of the collimator alignment in vertical and horizontal direction • Relative to the neigbouring quadrupoles • Requested precision 0.2 mm • Respecting the ALARA principle (As Low As Reasonably Achievable)

  6. „TIM“ Train Inspection Monorail • How to bring theequipmentin place? • Train based on themodular TIM concept • Train forvisualinspections • TractionModule • BatteryModule • Sensor Module • Control Module • The trainis controlled either by the user Interface or the measurementprogram

  7. „TIM“ Train Inspection Monorail Tractionunit Sensor unit Controlunit Batteryunit

  8. Concept • Digital closerangephotogrammetry • Fast and non contactmeasurement of theactivatedcollimators • Wireoffsetmeasurementstodetecttrainpositionand link the different aquisitionvolumes. • Reliablestraightreferenceoverlongdistances • Precise model forthewire sag isneeded Collimators Quad Quad

  9. Concept Collimator Quad Quad Targets Wire Sensor Cameras

  10. Concept Targets External lights Wire Reference Pin Inclination sensor

  11. Sensors • AEROEL XLS35-XY laser micrometer as wire measurement system • Open sensor configuration • Large field of view 35mm • Commercial on the market • AICON MoveInspect HR Photogrammetric system • WYLER Zerotronic Inclination Sensors

  12. XLS-35 Micrometer • Optical Laser Micrometer • Measurement of dark/lighttransistions • Relative positionof 2 wirestothereferencepin • 200Hz aquisitionfrequency • Linearityof ±2.5µm • Repeatabilityof ±2µm

  13. Photogrammetric System • Commercial Photogrammetric system AICON MoveInspect HR • 4 AVT Marlin F-201B Cameras in industrial housing • Syncbox • Calibration Panel • MoveInspect HR software • Custom modifications MoveInspectHR

  14. Photogrammetric System • Single shotsynchronisedaquisition • Automatic image measurement andcalculations • We obtain a set of 3D coordinates with identified point groups for collimator andwiresensorsystems • Nosimultaneouscalibration; adjustedintersections

  15. Targets • Retro targets are sensitive to radiation • Use of non retro targets • Production of special aluminium targets • whole body made of black matt aluminium • with light grey aluminium insert

  16. Calculations • 3 different coordiante systems • Left arm with measured wire • Right arm with measured wire • Photogrammetric system with arms and collimator • 7P transformations of the arm systems into the photosystem • Axis alignment to the wire using 3 translations and 2 rotations • Rotation of the y axis (wire axis) using the measured inclination of the two arms

  17. Systems Arm System Camera System

  18. Resultsare 3D coodinatesfor each collimatorandquadrupole in following coordinate system: • Aligned with the inclined wire • Z axis in a vertical plane • Generating LGC++ file • using the x coordinates as horizontal offsets • using the z coordinates as vertical distances (reduced by the slope and the wire sag) • Online LGC++ calculation and comparison with theoretical values

  19. Operation • Autonomoussystem after thestartupprocedure • Startup; Calibration; Sequencedefinition • ControlledbytheLabView Software • Sequencerrunning on thetrain • Remote Panel informingtheoperator

  20. Status • Sensorsystems are running • All Subroutines are running • Tunnelinstallation completed • Finalising Software • Finalising Hardware configuration • Tests.....

More Related