• D.A. Jaroszynski, M.P. Anania, E. Brunetti, S. Chen, S. Cipiccia, B. Ersfeld, J.P. Farmer, M.R. Islam, R.C. Issac, G. Raj, A. J. W. Reitsma, R.P. Shanks, G. Vieux, G.H. Welsh, S.M. Wiggins, X. Yang
  USTRAT/SUPA, Glasgow
• R.A. Bendoyro, F. Fiuza, M. Marti, J.L. Martins
  Instituto Superior Tecnico, Lisbon
• N. Bourgeois
  University of Oxford, Oxford
• J.M. Dias, N. Lemos, L.O. Silva
  GoLP, Lisbon
• P.S. Foster, R. Pattathil
  STFC/RAL, Chilton, Didcot, Oxon
• W.A. Gillespie
  University of Dundee, Nethergate, Dundee, Scotland
• S.M. Hooker
  OXFORDphysics, Oxford, Oxon
• T. Ibbotson
  University of Oxford, Clarendon Laboratory, Oxford
• A. MacLeod
  UAD, Dundee
• D. Maneuski, V. O'Shea
  University of Glasgow, Glasgow
• M.W. Poole
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire

We describe the latest results to develop brilliant incoherent and coherent radiation sources based on laser-plasma wakefield accelerators. We demonstrate both experimentally and theoretically a brilliant gamma ray sub 10 femtosecond source based on betatron radiation in the plasma density wake trailing behind an intense laser pulse. Furthermore, experimental and theoretical progress towards a compact free-electron laser based on a laser-plasma wakefield accelerator will be discussed.

• G. Berden, A.F.G. van der Meer
  FOM Rijnhuizen, Nieuwegein
• W.A. Gillespie, P.J. Phillips
  University of Dundee, Nethergate, Dundee, Scotland
• S.P. Jamison
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• A. MacLeod
  UAD, Dundee

Longitudinal electro-optic electron bunch diagnostics has been successfully applied at several accelerators. The electro-optic effect can be seen as an upconversion of the Coulomb field of the relativistic electron bunch (THz radiation) to the visible spectral range, where a variety of standard diagnostic tools are available. Standard techniques to characterise femtosecond optical laser pulses (auto- and cross-correlators) have led to the schemes that can measure electron bunch profiles with femtosecond resolution [1]. These techniques require, however, well synchronized femtosecond laser pulses, in order to obtain the desired temporal resolution. Currently, we are exploring other EO variants which require less advanced laser systems. The first results will be presented in our contribution.

[1] Berden et al. Phys. Rev. Lett. 99, 164801 (2007), B. Steffen et al. Phys. Rev. ST - Acc. Beams, 12, 032802 (2009)

• P.J. Phillips, A. MacLeod
  UAD, Dundee
• W.A. Gillespie
  University of Dundee, Nethergate, Dundee, Scotland
• S.P. Jamison
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire

Electro-optic longitudinal bunch profile monitors are being implemented on ALICE (Accelerators and Lasers In Combined Experiements) at Daresbury Laboratories and have been used to characterise the electron bunch and to provide a testbed for electro-optic diagnostic techniques. ALICE is a 20 MeV energy recovery linac based light source with a bunch length of approximately 0.4 ps and a bunch charge of 80 pC. It is being developed as an experimental test bed for a broad suite of science and technology activities that make use of electron acceleration and ultra-short pulse laser techniques. At ALICE the electro-optic station is located immediately after the bunch compressor. This location allows nearby OTR beam profile monitors and Coherent Synchrontron Radiation (CSR) diagnostics to be used for calibration and benchmarking. This range of diagnostics will be evulated for suitabililty on the Next Light Source (NLS) under development in the UK. We present data for both spectral decoding and temporal decoding of the electron bunch at different bunch compression ratios, plus a measurement of the timing jitter of the electron bunch.