Paper |
Title |
Page |
TUPRO046 |
Beamlines with Two Deflecting Cavities for Transverse-to-Longitudinal Phase Space Exchange |
1129 |
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- V. Balandin, W. Decking, N. Golubeva
DESY, Hamburg, Germany
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Optical systems for transverse-to-longitudinal emittance exchange involving single dipole-mode cavity were in great details studied during the last decade theoretically and experimentally. In this paper we discuss the question, if there are any advantages in usage of beamlines utilizing two deflecting cavities instead of one. The general analysis is presented and specific beamline designs are given as examples.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO046
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TUPRO047 |
Betatron Oscillations in Planar Dipole Field |
1132 |
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- V. Balandin, W. Decking, N. Golubeva
DESY, Hamburg, Germany
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In this paper, in preparation to the European XFEL commissioning, we consider the procedure of calculation of focusing properties of chicane-type bunch compressors and planar undulators using 2D magnetic field model (approximation of infinitely wide poles).
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO047
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TUPRO048 |
Dynamics of Twiss Parameters from the Geometrical Viewpoint |
1135 |
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- V. Balandin, N. Golubeva
DESY, Hamburg, Germany
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We show that with an appropriate parametrization the linear transport of the Twiss parameters can be viewed as a bilinear (or Moebius) map of the upper complex half-plane (which is the hyperbolic plane) into itself. Using then elementary techniques of hyperbolic geometry we classify transformations of the Twiss parameters into elliptic, hyperbolic and parabolic types and, for each type, present its typical phase space portraits.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO048
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TUPRO049 |
Layout and Optics of the Dump Line at the European XFEL |
1138 |
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- N. Golubeva, V. Balandin, W. Decking
DESY, Hamburg, Germany
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The purpose of the optical system, which we call the dump line, is not simply the transport of the beam to the beam dump. It is an essential part of the beam switchyard which provides the possibility to distribute electron bunches of one beam pulse to different FEL beam lines, allowing a flexible selection of the bunch pattern at each FEL experiment. In this paper we describe the final layout of this optical system as it is now under construction.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO049
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