IPAC2013 - List of Authors (Popov, Yu.A.)

Paper	Title	Page
MOPME010	Transverse Beam Profile Diagnostics using Point Spread Function Dominated Imaging with Dedicated De-focusing	488
	G. Kube, S. Bajt DESY, Hamburg, Germany W. Lauth IKP, Mainz, Germany Yu.A. Popov, A. Potylitsyn, L.G. Sukhikh TPU, Tomsk, Russia
	Transverse beam profile diagnostics in electron accelerators is usually based on direct imaging of a beam spot via optical radiation (transition or synchrotron radiation). In this case the fundamental resolution limit is determined by radiation diffraction in the optical system. A method to achieve resolutions beyond the diffraction limit is to perform point spread function (PSF) dominated imaging, i.e. the recorded image is dominated by the resolution function of a point source (single electron), and with knowledge of the PSF the true image (beam spot) may be reconstructed. To overcome the limited dynamical range of PSF dominated imaging, a dedicated de-focusing of the optical system can be introduced. In order to verify the applicability of this method, a proof-of-principle experiment has been performed at the Mainz Microtron MAMI (University of Mainz, Germany) using optical transition radiation. Status and results of this experiment will be presented.

MOPME011	Investigation of the Applicability of Parametric X-ray Radiation for Transverse Beam Profile Diagnostics	491
	G. Kube, C. Behrens DESY, Hamburg, Germany A.S. Gogolev, Yu.A. Popov, A. Potylitsyn TPU, Tomsk, Russia W. Lauth IKP, Mainz, Germany S. Weisse DESY Zeuthen, Zeuthen, Germany
	Transverse beam profile diagnostics in electron linacs is widely based on optical transition radiation (OTR) as standard technique which is observed in backward direction when a charged particle beam crosses the boundary between two media with different dielectric properties. The experience from modern linac based light sources like LCLS or FLASH shows that OTR diagnostics might fail because of coherence effects in the OTR emission process. A possibility to overcome this limitation is to measure at much shorter wavelengths, i.e. in the X-ray region, using parametric X-ray radiation (PXR) which additionally offers the advantage to be generated at crystal planes oriented under a certain angle to the crystal surface, thus allowing a spatial separation from a possible COTR background . A first test experiment has been performed at the Mainz Microtron MAMI (University of Mainz, Germany) in order to study the applicability of PXR for beam diagnostics, and the status of this experiment will be presented. A. Gogolev, A. Potylitsyn, G. Kube, Journal of Physics 357 (2012) 012018

Paper

Title

Page

Transverse Beam Profile Diagnostics using Point Spread Function Dominated Imaging with Dedicated De-focusing

488

G. Kube, S. Bajt
DESY, Hamburg, Germany
W. Lauth
IKP, Mainz, Germany
Yu.A. Popov, A. Potylitsyn, L.G. Sukhikh
TPU, Tomsk, Russia

Transverse beam profile diagnostics in electron accelerators is usually based on direct imaging of a beam spot via optical radiation (transition or synchrotron radiation). In this case the fundamental resolution limit is determined by radiation diffraction in the optical system. A method to achieve resolutions beyond the diffraction limit is to perform point spread function (PSF) dominated imaging, i.e. the recorded image is dominated by the resolution function of a point source (single electron), and with knowledge of the PSF the true image (beam spot) may be reconstructed. To overcome the limited dynamical range of PSF dominated imaging, a dedicated de-focusing of the optical system can be introduced. In order to verify the applicability of this method, a proof-of-principle experiment has been performed at the Mainz Microtron MAMI (University of Mainz, Germany) using optical transition radiation. Status and results of this experiment will be presented.

MOPME011

Investigation of the Applicability of Parametric X-ray Radiation for Transverse Beam Profile Diagnostics

491

G. Kube, C. Behrens
DESY, Hamburg, Germany
A.S. Gogolev, Yu.A. Popov, A. Potylitsyn
TPU, Tomsk, Russia
W. Lauth
IKP, Mainz, Germany
S. Weisse
DESY Zeuthen, Zeuthen, Germany

Transverse beam profile diagnostics in electron linacs is widely based on optical transition radiation (OTR) as standard technique which is observed in backward direction when a charged particle beam crosses the boundary between two media with different dielectric properties. The experience from modern linac based light sources like LCLS or FLASH shows that OTR diagnostics might fail because of coherence effects in the OTR emission process. A possibility to overcome this limitation is to measure at much shorter wavelengths, i.e. in the X-ray region, using parametric X-ray radiation (PXR) which additionally offers the advantage to be generated at crystal planes oriented under a certain angle to the crystal surface, thus allowing a spatial separation from a possible COTR background *. A first test experiment has been performed at the Mainz Microtron MAMI (University of Mainz, Germany) in order to study the applicability of PXR for beam diagnostics, and the status of this experiment will be presented.
* A. Gogolev, A. Potylitsyn, G. Kube, Journal of Physics 357 (2012) 012018