Wuppertal 2015 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 9: Beam Dynamics / Simulation I

AKBP 9.5: Vortrag

Dienstag, 10. März 2015, 17:45–18:00, BZ.08.04 (HS 2)

Space-charge matching of the transverse phase space at PITZ — •Georgios Kourkafas¹, Alexey V. Bondarenko², Mikhail Krasilnikov¹, Barbara Marchetti¹, and Aleksandr N. Matveenko² — ¹DESY, Zeuthen, Germany — ²HZB, Berlin, Germany

Various diagnostics, applications and experiments at PITZ require specific transverse beam parameters at certain parts of the beamline. The standard matching techniques which do not include the effect of space charge are proven to be unsuccessful due to the moderate energy and high charge density of the generated bunches. On the other hand, codes which accurately simulate the self fields are too slow to provide results quick enough for on-line application.

A compromise is found when considering only the linear space-charge forces in the beam dynamics. For stationary beams in dense and periodic lattices, the smooth-approximation theory can be used to include the space-charge effect in matching codes like MAD. For the general case, codes like SC (developed in HZB) can be used to solve and iteratively optimize the beam envelope equation for each longitudinal slice of the bunch, taking into account the correlated emittance growth. The performance of both approaches is demonstrated and evaluated using the ASTRA software for the matching requirements of the phase space tomography at PITZ.