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Title |
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| TUOAM02 |
The Status of the Daresbury Energy Recovery Linac Prototype
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1001 |
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- D. J. Holder, P. A. McIntosh, S. L. Smith
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- N. Bliss
STFC/DL, Daresbury, Warrington, Cheshire
- A. R. Goulden
STFC/DL/SRD, Daresbury, Warrington, Cheshire
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This paper provides an update on the progress with the building and commissioning of the Energy Recovery Linac Prototype (ERLP). The past year has seen a number of notable achievements as well as a number of obstacles to overcome. The detailed results from the gun commissioning work are described elsewhere at this conference. ERLP is a 35 MeV technology demonstrator being built as part of the UK's R&D programme to develop its next-generation light source (NLS). It is based on a combination of a DC photocathode electron gun, a superconducting injector linac and a main linac operating in energy recovery mode. These drive an IR-FEL, an inverse Compton Back-Scattering (CBS) x-ray source and a terahertz beamline. The priorities for ERLP are to gain experience of operating a photoinjector gun and superconducting linacs; to produce and maintain high-brightness electron beams; to achieve energy recovery from an FEL-disrupted beam; the development of an electro-optic longitudinal profile monitor and to study challenging synchronisation issues. ERLP will also act as an injector for what will be the world's first non-scaling, Fixed-Field Alternating Gradient (FFAG) accelerator called EMMA.
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Slides
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| WEPP168 |
Mechanical Design of Collimators for the ILC
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2883 |
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- B. D. Fell, D. Angal-Kalinin, S. C. Appleton, J.-L. Fernandez-Hernando, F. Jackson, O. B. Malyshev
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- N. Bliss
STFC/DL, Daresbury, Warrington, Cheshire
- G. Ellwood, R. J.S. Greenhalgh
STFC/RAL, Chilton, Didcot, Oxon
- J. D.A. Smith
Cockcroft Institute, Warrington, Cheshire
- N. K. Watson
Birmingham University, Birmingham
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Much attention has been paid to the optimisation of the geometry and material of collimators in the ILC to mitigate the effects of both short-range transverse wakefields and errant beam impacts. We discuss the competing demands imposed by realistic engineering constraints and present a preliminary engineering design for adjustable jaw spoilers for the ILC.
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| THPP002 |
EMMA RF Cavity Design and Prototype Testing at Daresbury
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3374 |
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- C. D. Beard, P. A. Corlett, D. M. Dykes, P. Goudket, C. Hill, P. A. McIntosh, A. J. Moss, J. F. Orrett, J. H.P. Rogers, A. E. Wheelhouse, E. Wooldridge
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- N. Bliss
STFC/DL, Daresbury, Warrington, Cheshire
- A. E. Bogle, T. L. Grimm, A. A. Kolka
Niowave, Inc., Lansing, Michigan
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At PAC’07 we discussed the design of a prototype cavity to be used on EMMA*. EMMA is a prototype non-scalling FFAG. It will contain 19 RF cavities operating at 1.3 GHz with a baseline accelerating voltage of 120 kV. A prototype cavity has been manufactured by Niowave, Inc. and we will present a discussion of its RF and mechanical design. This cavity was put through low power tests, to determine frequency, tuning range, shunt impedance and Q of the cavity; and high power tests, to confirm power handling ability, when it arrived at Daresbury Laboratory this spring. The results of these tests were compared to the simulations and a bead pull was carried out to obtain the field profile. The cavities for EMMA are likely to be powered by IOTs, these will be used for the high power tests, which will demonstrate cavity operation to the required maximum of 180 kV.
*E. Wooldridge et al. "RF Cavity Development for FFAG Application on ERLP at Daresbury," Proceedings of PAC’07, Albuquerque, NM (2007).
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| THPP003 |
RF System Design for the EMMA FFAG
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3377 |
| |
- C. D. Beard, S. A. Griffiths, C. Hill, P. A. McIntosh, A. E. Wheelhouse
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- N. Bliss, A. J. Moss, C. J. White
STFC/DL, Daresbury, Warrington, Cheshire
- D. Teytelman
Dimtel, San Jose
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In this report the RF system design for EMMA is described. The power source options, power supplies, waveguide distribution scheme and control system is discussed. The architecture necessary to meet the operation specifications requires a large degree of adjustment. To simplify commissioning and enhance the versatility of the machine a complex RF system is desired. This report details the RF "knobs" included to meet this.
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| THPP004 |
EMMA - the World's First Non-scaling FFAG
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3380 |
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- T. R. Edgecock
STFC/RAL, Chilton, Didcot, Oxon
- C. D. Beard, J. A. Clarke, C. Hill, S. P. Jamison, A. Kalinin, K. B. Marinov, N. Marks, P. A. McIntosh, B. D. Muratori, H. L. Owen, Y. M. Saveliev, B. J.A. Shepherd, R. J. Smith, S. L. Smith, S. I. Tzenov, E. Wooldridge
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- J. S. Berg, D. Trbojevic
BNL, Upton, Long Island, New York
- N. Bliss, C. J. White
STFC/DL, Daresbury, Warrington, Cheshire
- M. K. Craddock
UBC & TRIUMF, Vancouver, British Columbia
- J. L. Crisp, C. Johnstone
Fermilab, Batavia, Illinois
- Y. Giboudot
Brunel University, Middlesex
- E. Keil
CERN, Geneva
- D. J. Kelliher, S. Machida
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- S. R. Koscielniak
TRIUMF, Vancouver
- F. Meot
CEA, Gif-sur-Yvette
- T. Yokoi
OXFORDphysics, Oxford, Oxon
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EMMA - the Electron Model of Many Applications - is to be built at the STFC Daresbury Laboratory in the UK and will be the first non-scaling FFAG ever constructed. EMMA will be used to demonstrate the principle of this type of accelerator and study their features in detail. The design of the machine and its hardware components are now far advanced and construction is due for completion in summer 2009.
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