Precision Magnet Measurements for X-Band Accelerator Quadrupole Triplets

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An X-band test station is being developed at LLNL to investigate accelerator optimization for future upgrades to mono-energetic gamma-ray (MEGa-Ray) technology at LLNL. Beamline magnets will include an emittance compensation solenoid, windowpane steering dipoles, and quadrupole magnets. Demanding tolerances have been placed on the alignment of these magnets, which directly affects the electron bunch beam quality. A magnet mapping system has been established at LLNL in order to ensure the delivered magnets match their field specification, and the mountings are aligned and capable of reaching the specified alignment tolerances. The magnet measurement system will be described which uses a 3-axis ... continued below

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Marsh, R A; Anderson, S G & Armstrong, J P May 16, 2012.

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An X-band test station is being developed at LLNL to investigate accelerator optimization for future upgrades to mono-energetic gamma-ray (MEGa-Ray) technology at LLNL. Beamline magnets will include an emittance compensation solenoid, windowpane steering dipoles, and quadrupole magnets. Demanding tolerances have been placed on the alignment of these magnets, which directly affects the electron bunch beam quality. A magnet mapping system has been established at LLNL in order to ensure the delivered magnets match their field specification, and the mountings are aligned and capable of reaching the specified alignment tolerances. The magnet measurement system will be described which uses a 3-axis Lakeshore gauss probe mounted on a 3-axis translation stage. Alignment accuracy and precision will be discussed, as well as centering measurements and analysis. The dependence on data analysis over direct multi-pole measurement allows a significant improvement in useful alignment information. Detailed analysis of measurements on the beamline quadrupoles will be discussed, including multi-pole content both from alignment of the magnets, and the intrinsic level of multi-pole magnetic field.

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PDF-file: 5 pages; size: 0.4 Mbytes

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  • Presented at: IPAC 2012, New Orleans, LA, United States, May 20 - May 25, 2012

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  • Report No.: LLNL-PROC-557665
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1044230
  • Archival Resource Key: ark:/67531/metadc827350

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Office of Scientific & Technical Information Technical Reports

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  • May 16, 2012

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  • May 19, 2016, 9:45 a.m.

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  • Nov. 30, 2016, 5:09 p.m.

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Marsh, R A; Anderson, S G & Armstrong, J P. Precision Magnet Measurements for X-Band Accelerator Quadrupole Triplets, article, May 16, 2012; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc827350/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.