Smith, S.L.

Paper	Title	Page
MOZBPA02	A Review of ERL Prototype Experience and Light Source Design Challenges	39
	S.L. Smith CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
	The presentation will review the status of commissioning of ERL light source prototype projects drawing on experience from the JLab IR FEL, UK's ERL prototype ring and the Cornell injector project. State of the art design for future light source based on ERLs and FELs will be illustrated using the concept for the UK's 4GLS project.
	Transparencies
MOPCH069	Lattice Design for the Fourth Generation Light Source at Daresbury Laboratory	184
	B.D. Muratori, M.A. Bowler, H.L. Owen, S.L. Smith CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire S.V. Miginsky BINP SB RAS, Novosibirsk
	The proposed Fourth Generation Light Source (4GLS) has three electron transport paths, an energy recovery loop containing the main linac, IDs and a VUV-FEL, a separate branch after the main linac for an XUV-FEL and a transport path for an IR-FEL. The first two present major challenges in lattice design. The energy recovery loop will be fed by a high average current gun, with bunches of charge of about 80 pC. High charge (1nC) bunches from a high brightness gun will be accelerated prior to the main linac and split into the XUV-FEL branch using energy separation after the main linac. We present a lattice design and results from numerical modelling of the electron bunch transport. The requirements of the machine are short bunches, a small emittance for both branches and an overall topology which gives a reasonable dimension for the building. Different transport and compression schemes were assessed to meet these requirements whilst balancing the disruptive effects of longitudinal and transverse space charge, CSR, wakefields and BBU. Investigations into all of these instabilities are summarized together with other transport issues and the resulting requirements on all IDs.
MOPCH070	The Status of the Daresbury Energy Recovery Prototype Project	187
	D.J. Holder, J.A. Clarke, P.A. McIntosh, M.W. Poole, S.L. Smith CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire N. Bliss CCLRC/DL, Daresbury, Warrington, Cheshire E.A. Seddon CCLRC/DL/SRD, Daresbury, Warrington, Cheshire
	The major component of the UK's R&D programme towards an advanced energy recovery linac-based light source facility is a 35 MeV technology demonstrator called the energy recovery linac prototype (ERLP). This is based on a combination of a DC photocathode electron gun, a superconducting linac operated in energy recovery mode and an IR FEL. The current status of the of this project is presented, including the construction and commissioning progress and plans for the future exploitation of this scientific and technical R&D facility.