Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number DE2012-1045805
Title First Beam Measurements with the LHC Synchrotron Light Monitors.
Publication Date 2012
Media Count 3p
Personal Author A. Goldblatt A. Guerrero A. Jeff A. S. Fisher E. Bravin F. Roncarolo G. Burtin T. Lefevre
Abstract The continuous monitoring of the transverse sizes of the beams in the Large Hadron Collider (LHC) relies on the use of synchrotron radiation and intensified video cameras. Depending on the beam energy, different synchrotron light sources must be used. A dedicated superconducting undulator has been built for low beam energies (450 GeV to 1.5 TeV), while edge and centre radiation from a beam-separation dipole magnet are used respectively for intermediate and high energies (up to 7 TeV). The emitted visible photons are collected using a retractable mirror, which sends the light into an optical system adapted for acquisition using intensified CCD cameras. This paper presents the design of the imaging system, and compares the expected light intensity with measurements and the calculated spatial resolution with a cross calibration performed with the wire scanners. Upgrades and future plans are also discussed.
Keywords Accelerators
Large hadron collider
Light sources
Optical systems
Spatial resolution
Synchrotron radiation
Wiggler magnets

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 46 - Physics
Corporate Author European Organization for Nuclear Research, Geneva (Switzerland).
Document Type Technical report
Title Note N/A
NTIS Issue Number 1226
Contract Number DE-AC02-76SF00515

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader