BIW2012 - List of Authors (Galtié, A.)

Paper	Title	Page
TUPG006	PDV Investigations on the CESAR Facility: 700 keV, 350 kA Pulsed Electron Beam	142
	B. Cadilhon, B. Bicrel, T. Desanlis, A. Galtié, L. Voisin CEA, Le Barp, France
	CESAR is a high current electron beam facility. It consists of a 2Ω pulsed power generator which can deliver a 350kA, 700kV, 65ns pulsed electron beam thanks to a vacuum diode. The electron beam is focused on a target material in which it deposits its energy very quickly. Different measurement techniques are investigated such as impulse, rear surface motion or pressure to study thermo-mechanical behaviour of studied materials. Former works* have already been carried out using diagnostics such as time resolved spectrometer or x-ray imagery to define the main characteristics of the electron beam. Today, we are focusing on the measurement of surface velocities up to several hundreds meters-per-second on different types of shock physics experiments. It is a time resolved surface velocimetry using the heterodyne technique. This diagnostic is assembled with single-mode fiber lasers to deliver light to and from the target. The return Doppler-shifted light is mixed with the original laser light to generate a beat frequency proportional to the velocity. We describe here our approach to measure velocities with heterodyne technique. We present recent data obtained with this diagnostics. * Characterization of an intense electron beam driven by CESAR – a 600kV, 300kA pulsed power generator, Voisin, L. & al., proceedings of the IEEE Pulsed Power Conference, 2007, pp. 822-825.

Paper

Title

Page

PDV Investigations on the CESAR Facility: 700 keV, 350 kA Pulsed Electron Beam

142

B. Cadilhon, B. Bicrel, T. Desanlis, A. Galtié, L. Voisin
CEA, Le Barp, France

CESAR is a high current electron beam facility. It consists of a 2Ω pulsed power generator which can deliver a 350kA, 700kV, 65ns pulsed electron beam thanks to a vacuum diode. The electron beam is focused on a target material in which it deposits its energy very quickly. Different measurement techniques are investigated such as impulse, rear surface motion or pressure to study thermo-mechanical behaviour of studied materials. Former works* have already been carried out using diagnostics such as time resolved spectrometer or x-ray imagery to define the main characteristics of the electron beam. Today, we are focusing on the measurement of surface velocities up to several hundreds meters-per-second on different types of shock physics experiments. It is a time resolved surface velocimetry using the heterodyne technique. This diagnostic is assembled with single-mode fiber lasers to deliver light to and from the target. The return Doppler-shifted light is mixed with the original laser light to generate a beat frequency proportional to the velocity. We describe here our approach to measure velocities with heterodyne technique. We present recent data obtained with this diagnostics.
* Characterization of an intense electron beam driven by CESAR – a 600kV, 300kA pulsed power generator, Voisin, L. & al., proceedings of the IEEE Pulsed Power Conference, 2007, pp. 822-825.