FEL2012 - List of Authors (Thakker, T.T.)

Paper	Title	Page
TUPD39	Effect of Active Fibre Stabilization on Group and Phase Delay	329
	T.T. Thakker, S.P. Jamison STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	An optical clock distribution system is being developed on the ALICE accelerator at Daresbury Laboratory. The system is based on a MLL fibre stabilization scheme* which delivers the clock signal with ultrashort optical pulses over an actively stabilized optical fibre. While these schemes stabilize the pulse transit time through fibre, they do not necessarily control the optical carrier. The ability to stabilize both the carrier and envelope phase in these systems could give higher resolution current envelope stabilized systems while continuing to deliver ultrashort pulses for use at delivery sites. We report here on a carrier phase detector to investigate the carrier-envelope phase walk-off in fibre distribution systems and how it is affected by active stabilization of the fibre. The phase monitor uses polarisation rotation associated with sub-wavelength delays in the fibre to detect changes in the carrier phase of ultrashort pulses. We present here studies of the carrier phase stability in an actively stabilized fibre link and its implications on the feasibility of stabilizing both carrier and envelope phase in pulsed synchronisation systems. * S. Schulz et. al., Progress towards a permanent optical synchronization infrastructure at FLASH, Proc. of FEL 2009, Liverpool, UK, WEPC72 (2009).

WEPD42	Electron Beam Dynamics in the ALICE IR-FEL Facility	464
	F. Jackson, D. Angal-Kalinin, J.W. McKenzie, Y.M. Saveliev, T.T. Thakker, N. Thompson, P.H. Williams STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom A. Wolski The University of Liverpool, Liverpool, United Kingdom
	The ALICE facility at Daresbury Laboratory is an energy recovery test accelerator which includes an infra-red oscillator-type free electron laser (IR-FEL). The longitudinal phase space of the electron bunches and the longitudinal transport functions in the ALICE accelerator are studied in this paper.

WEPD66	Phase Space Manipulation with Laser-generated Terahertz Pulses	523
	S.P. Jamison, B.D. Muratori, Y.M. Saveliev, R.J. Smith, T.T. Thakker STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom M.J. Cliffe, W.R. Flavell, D.M. Graham The University of Manchester, The Photon Science Institute, Manchester, United Kingdom D.J. Holder, D. Newton, A. Wolski The University of Liverpool, Liverpool, United Kingdom
	Ultrafast lasers are able to generate THz pulses with >1MV/m field strengths, and with controllable electric field temporal profiles. We report on an experiment to demonstrate the use of laser generated THz pulses to manipulate the γ-z correlation of a ∼ 20MeV electron bunch on a sub picosecond time scale. The manipulation is achieved in free space, without external magnetic fields or undulators, by the interaction of the bunch with the longitudinal electric field of a co-propagating THz pulse in a TEM10*-like mode. We discuss the potential for arbitrary phase space control, including the possibility of correcting temporal jitter and driving electron beams into synchronisation with the laser.

Paper

Title

Page

Effect of Active Fibre Stabilization on Group and Phase Delay

329

T.T. Thakker, S.P. Jamison
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

An optical clock distribution system is being developed on the ALICE accelerator at Daresbury Laboratory. The system is based on a MLL fibre stabilization scheme* which delivers the clock signal with ultrashort optical pulses over an actively stabilized optical fibre. While these schemes stabilize the pulse transit time through fibre, they do not necessarily control the optical carrier. The ability to stabilize both the carrier and envelope phase in these systems could give higher resolution current envelope stabilized systems while continuing to deliver ultrashort pulses for use at delivery sites. We report here on a carrier phase detector to investigate the carrier-envelope phase walk-off in fibre distribution systems and how it is affected by active stabilization of the fibre. The phase monitor uses polarisation rotation associated with sub-wavelength delays in the fibre to detect changes in the carrier phase of ultrashort pulses. We present here studies of the carrier phase stability in an actively stabilized fibre link and its implications on the feasibility of stabilizing both carrier and envelope phase in pulsed synchronisation systems.
* S. Schulz et. al., Progress towards a permanent optical synchronization infrastructure at FLASH, Proc. of FEL 2009, Liverpool, UK, WEPC72 (2009).

WEPD42

Electron Beam Dynamics in the ALICE IR-FEL Facility

464

F. Jackson, D. Angal-Kalinin, J.W. McKenzie, Y.M. Saveliev, T.T. Thakker, N. Thompson, P.H. Williams
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
A. Wolski
The University of Liverpool, Liverpool, United Kingdom

The ALICE facility at Daresbury Laboratory is an energy recovery test accelerator which includes an infra-red oscillator-type free electron laser (IR-FEL). The longitudinal phase space of the electron bunches and the longitudinal transport functions in the ALICE accelerator are studied in this paper.

WEPD66

Phase Space Manipulation with Laser-generated Terahertz Pulses

523

S.P. Jamison, B.D. Muratori, Y.M. Saveliev, R.J. Smith, T.T. Thakker
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
M.J. Cliffe, W.R. Flavell, D.M. Graham
The University of Manchester, The Photon Science Institute, Manchester, United Kingdom
D.J. Holder, D. Newton, A. Wolski
The University of Liverpool, Liverpool, United Kingdom

Ultrafast lasers are able to generate THz pulses with >1MV/m field strengths, and with controllable electric field temporal profiles. We report on an experiment to demonstrate the use of laser generated THz pulses to manipulate the γ-z correlation of a ∼ 20MeV electron bunch on a sub picosecond time scale. The manipulation is achieved in free space, without external magnetic fields or undulators, by the interaction of the bunch with the longitudinal electric field of a co-propagating THz pulse in a TEM10*-like mode. We discuss the potential for arbitrary phase space control, including the possibility of correcting temporal jitter and driving electron beams into synchronisation with the laser.