PAC09 - List of Authors (van Tilborg, J.)

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van Tilborg, J.

Paper	Title	Page
FR5RFP008	Optimization and Single-Shot Characterization of Ultrashort THz Pulses from a Laser Plasma Accelerator	4548
	G.R.D. Plateau, C.G.R. Geddes, W. Leemans, N.H. Matlis, C.B. Schroeder, C. Tóth, J. van Tilborg LBNL, Berkeley, California
	Funding: This work supported by DARPA and US DoE Office of High Energy Physics under contract DE-AC02-05CH11231. Ultrashort terahertz pulses with energies in the μJ range can be generated with laser wakefield accelerators (LWFA), which produce ultrashort electron bunches with energies up to 1 GeV* and energy spreads of a few-percent. At the plasma-vacuum interface these ultrashort bunches emit coherent transition radiation (CTR) in a wide bandwidth (~ 1 - 10 THz) yielding terahertz pulses of high intensity,. In addition to providing a non-invasive bunch-length diagnostic*** and thus feedback for the LWFA, these high peak power THz pulses are suitable for high field (MV/cm) pump-probe experiments. Maximizing the radiated energy was done by controlling the THz mode quality and by optimizing both the energy and the charge of the electron bunches via pre-pulse control on the driver beam. Here we present the study of three different techniques for pre-pulse control and we demonstrate the production of μJ-class THz pulses using energy-based and single-shot electro-optic measurements. W.P. Leemans et al., Nature Physics 2, 696 (2006) W.P. Leemans et al., PRL 91, 074802 (2003) C.B. Schroeder et al., PRE 69, 016501 (2004) ** J. van Tilborg et al., PRL 96, 014801 (2006)

Paper

Title

Page

FR5RFP008

Optimization and Single-Shot Characterization of Ultrashort THz Pulses from a Laser Plasma Accelerator

4548

G.R.D. Plateau, C.G.R. Geddes, W. Leemans, N.H. Matlis, C.B. Schroeder, C. Tóth, J. van Tilborg
LBNL, Berkeley, California

Funding: This work supported by DARPA and US DoE Office of High Energy Physics under contract DE-AC02-05CH11231.

Ultrashort terahertz pulses with energies in the μJ range can be generated with laser wakefield accelerators (LWFA), which produce ultrashort electron bunches with energies up to 1 GeV* and energy spreads of a few-percent. At the plasma-vacuum interface these ultrashort bunches emit coherent transition radiation (CTR) in a wide bandwidth (~ 1 - 10 THz) yielding terahertz pulses of high intensity**,***. In addition to providing a non-invasive bunch-length diagnostic**** and thus feedback for the LWFA, these high peak power THz pulses are suitable for high field (MV/cm) pump-probe experiments. Maximizing the radiated energy was done by controlling the THz mode quality and by optimizing both the energy and the charge of the electron bunches via pre-pulse control on the driver beam. Here we present the study of three different techniques for pre-pulse control and we demonstrate the production of μJ-class THz pulses using energy-based and single-shot electro-optic measurements.

*W.P. Leemans et al., Nature Physics 2, 696 (2006)
**W.P. Leemans et al., PRL 91, 074802 (2003)
***C.B. Schroeder et al., PRE 69, 016501 (2004)
**** J. van Tilborg et al., PRL 96, 014801 (2006)