ICAP2012 - List of Authors (Zagorodnov, I.)

Paper

Title

Page

Numerical Modeling of Collective Effects in Free Electron Laser

81

I. Zagorodnov
DESY, Hamburg, Germany

In order to have a free electron laser (FEL) of high performance we need to design and optimize it taking into account the dynamics of electrons and their interactions with each other and with their surroundings. An accurate self-consistent simulation of collective effects in the charged beams remains a challenging problem for numerical analysis. In this paper we consider only the modeling of FEL process in an undulator section. We give a short overview of the numerical methods adopted in different FEL codes. Advantages and drawbacks of these methods will be discussed. Some approaches to improve the accuracy and efficiency of the codes will be presented and the remaining challenges in FEL modeling will be highlighted.

Slides TUACI1 [2.659 MB]

THACC3

Preliminary Study of Single Spike SASE FEL Operation at 0.26 Nanometers Wavelength for the European XFEL

253

B. Marchetti, M. Krasilnikov, F. Stephan
DESY Zeuthen, Zeuthen, Germany
M. Dohlus, Y.A. Kot, I. Zagorodnov
DESY, Hamburg, Germany
J. Rönsch-Schulenburg
Uni HH, Hamburg, Germany

The production of ultra-short (fs or sub-fs long), high power, radiation pulses in the X-ray spectral region, showing a single spike spectrum, represents a challenge for many existent SASE- FELs [1, 2]. In order to realize single spike operation the length of the electron bunch after compression must be extremely small [3] (less than a micrometer) and the consequent degradation of its emittance has not to suppress the radiation production. Several technical restrictions, such as limits of diagnostics for small charges, RF jitter and micro-bunching instabilities play an important role in the choice of the operation working point. In this paper we are going to study the feasibility of single spike or few spikes lasing for bunches with charge of tens of pC in the European XFEL facility giving some preliminary results concerning the choice of the working point.
[1] J.B. Rosenzweig et al., NIM A 593 (2008) 39-44
[2] S. Reiche et al., NIM A 593 (2008) 45-48
[3] R. Bonifacio et al., PRL vol. 73 n.1 (1994)

Slides THACC3 [1.401 MB]

Paper	Title	Page
TUACI1	Numerical Modeling of Collective Effects in Free Electron Laser	81
	I. Zagorodnov DESY, Hamburg, Germany
	In order to have a free electron laser (FEL) of high performance we need to design and optimize it taking into account the dynamics of electrons and their interactions with each other and with their surroundings. An accurate self-consistent simulation of collective effects in the charged beams remains a challenging problem for numerical analysis. In this paper we consider only the modeling of FEL process in an undulator section. We give a short overview of the numerical methods adopted in different FEL codes. Advantages and drawbacks of these methods will be discussed. Some approaches to improve the accuracy and efficiency of the codes will be presented and the remaining challenges in FEL modeling will be highlighted.
	Slides TUACI1 [2.659 MB]

THACC3	Preliminary Study of Single Spike SASE FEL Operation at 0.26 Nanometers Wavelength for the European XFEL	253
	B. Marchetti, M. Krasilnikov, F. Stephan DESY Zeuthen, Zeuthen, Germany M. Dohlus, Y.A. Kot, I. Zagorodnov DESY, Hamburg, Germany J. Rönsch-Schulenburg Uni HH, Hamburg, Germany
	The production of ultra-short (fs or sub-fs long), high power, radiation pulses in the X-ray spectral region, showing a single spike spectrum, represents a challenge for many existent SASE- FELs [1, 2]. In order to realize single spike operation the length of the electron bunch after compression must be extremely small [3] (less than a micrometer) and the consequent degradation of its emittance has not to suppress the radiation production. Several technical restrictions, such as limits of diagnostics for small charges, RF jitter and micro-bunching instabilities play an important role in the choice of the operation working point. In this paper we are going to study the feasibility of single spike or few spikes lasing for bunches with charge of tens of pC in the European XFEL facility giving some preliminary results concerning the choice of the working point. [1] J.B. Rosenzweig et al., NIM A 593 (2008) 39-44 [2] S. Reiche et al., NIM A 593 (2008) 45-48 [3] R. Bonifacio et al., PRL vol. 73 n.1 (1994)
	Slides THACC3 [1.401 MB]