RUPAC2012 - List of Authors (Floettmann, K.)

Paper	Title	Page
MOPPA005	Laser-Wakefield Acceleration with External Bunch Injection at REGAE	254
	J. Grebenyuk, K. Flöttmann DESY, Hamburg, Germany T. Mehrling, J. Osterhoff Uni HH, Hamburg, Germany
	Funding: Helmholtz Alliance Short and highly intense laser pulses focused into a gas target, ionise the gas and may excite large amplitude plasma waves that support extreme electric fields (>10 GV/m) for acceleration of charged particles. The REGAE facility at DESY, which provides 2-5 MeV of ~10 fs bunches, offers the unique possibility to study the external injection of pre-accelerated electron bunches from a conventional accelerator, and their subsequent acceleration in plasma wakefields. Simulations were performed with the particle-in-cell code OSIRIS, showing a wide variety of effects which can be explored in the future at REGAE. External controlled injection allows to study effects which require precise information about the beam quality, position and momentum at the initial point of injection. Topics of a particular interest are: bunch emittance growth suppression, controlled betatron motion, and longitudinal bunch compression.

WEPPD012	Standing Wave RF Deflectors with Reduced Aberrations	590
	V.V. Paramonov, L.V. Kravchuk, P. Orlov RAS/INR, Moscow, Russia K. Flöttmann DESY, Hamburg, Germany
	Funding: in part RBFR N 12-02-00654-a Deflecting structures are now widely used for bunch phase space manipulations either with bunch rotation for special bunch diagnostic or in emittance exchange experiments. Even if the field of synchronous harmonic is aberration free, the higher space harmonics provide non linear additives in the field distribution, leading to emittance growth during phase space manipulation. Standing wave operation is more RF efficient for short deflectors. The criterion of the field quality estimation and results is of deflecting structure consideration for minimization of non linear additives are presented. The solutions for dispersion correction together with end cells optimization are described too.

Paper

Title

Page

Laser-Wakefield Acceleration with External Bunch Injection at REGAE

254

J. Grebenyuk, K. Flöttmann
DESY, Hamburg, Germany
T. Mehrling, J. Osterhoff
Uni HH, Hamburg, Germany

Funding: Helmholtz Alliance
Short and highly intense laser pulses focused into a gas target, ionise the gas and may excite large amplitude plasma waves that support extreme electric fields (>10 GV/m) for acceleration of charged particles. The REGAE facility at DESY, which provides 2-5 MeV of ~10 fs bunches, offers the unique possibility to study the external injection of pre-accelerated electron bunches from a conventional accelerator, and their subsequent acceleration in plasma wakefields. Simulations were performed with the particle-in-cell code OSIRIS, showing a wide variety of effects which can be explored in the future at REGAE. External controlled injection allows to study effects which require precise information about the beam quality, position and momentum at the initial point of injection. Topics of a particular interest are: bunch emittance growth suppression, controlled betatron motion, and longitudinal bunch compression.

WEPPD012

Standing Wave RF Deflectors with Reduced Aberrations

590

V.V. Paramonov, L.V. Kravchuk, P. Orlov
RAS/INR, Moscow, Russia
K. Flöttmann
DESY, Hamburg, Germany

Funding: in part RBFR N 12-02-00654-a
Deflecting structures are now widely used for bunch phase space manipulations either with bunch rotation for special bunch diagnostic or in emittance exchange experiments. Even if the field of synchronous harmonic is aberration free, the higher space harmonics provide non linear additives in the field distribution, leading to emittance growth during phase space manipulation. Standing wave operation is more RF efficient for short deflectors. The criterion of the field quality estimation and results is of deflecting structure consideration for minimization of non linear additives are presented. The solutions for dispersion correction together with end cells optimization are described too.