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Tracking simulation studies of the vertical emittance growth in the ATF extraction line

Abstract : Since several years, the vertical emittance of the beam measured in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK has been significantly larger than that measured in the Damping Ring (DR) itself. This long-standing problem has motivated studies of possible sources of anomalous emittance growth. One possible contribution is the non-linearity in the magnetic fields that the beam experiences while passing off-axis through the magnets shared between the DR and thge EXT line. In order to quantify this effect, these magnets have been carefully modeled in terms of multipole expansions, to enable tracking simulations. Results indicate that there is significant emittance growth when the extracted beam passes with a vertical offset with respect to its reference position.
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http://hal.in2p3.fr/in2p3-00374417
Contributor : Sabine Starita <>
Submitted on : Wednesday, April 8, 2009 - 4:19:36 PM
Last modification on : Wednesday, September 16, 2020 - 4:23:19 PM
Long-term archiving on: : Thursday, June 10, 2010 - 8:05:19 PM

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LALRT0904.pdf
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  • HAL Id : in2p3-00374417, version 1

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IN2P3 | LAL | CNRS | LARA

Citation

M. Alabau-Pons, A. Faus-Golfe, P. Bambade. Tracking simulation studies of the vertical emittance growth in the ATF extraction line. 2009, pp.1-11. ⟨in2p3-00374417⟩

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