IPAC2012 - List of Authors (Seviour, R.)

Paper

Title

Page

Thorium Energy Futures

29

S. Peggs, W. Horak, T. Roser
BNL, Upton, Long Island, New York, USA
V.B. Ashley, R.F. Ashworth
Jacobs Engineering, Pasadena, USA
R.J. Barlow, R. Cywinski, R. Seviour
University of Huddersfield, Huddersfield, United Kingdom
J.-L. Biarrotte
IPN, Orsay, France
S. Henderson
Fermilab, Batavia, USA
A. Hutton
JLAB, Newport News, Virginia, USA
J. Kelly
Thor Energy, Oslo, Norway
M. Lindroos
ESS, Lund, Sweden
P.M. McIntyre
Texas A&M University, College Station, Texas, USA
A. Norlin
IThEO, Sweden
H.L. Owen
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
G.T. Parks
University of Cambridge, Cambridge, United Kingdom

The potential for thorium as an alternative or supplement to uranium in fission power generation has long been recognised, and several reactors, of various types, have already operated using thorium-based fuels. Accelerator Driven Subcritical (ADS) systems have benefits and drawbacks when compared to conventional critical thorium reactors, for both solid and molten salt fuels. None of the four options – liquid or solid, with or without an accelerator – can yet be rated as better or worse than the other three, given today's knowledge. We outline the research that will be necessary to lead to an informed choice.

Slides MOOBA01 [3.887 MB]

WEPPC033

RF and Surface Properties of Bulk Niobium and Niobium Film Samples

2278

T. Junginger, W. Weingarten
CERN, Geneva, Switzerland
R. Seviour
University of Huddersfield, Huddersfield, United Kingdom
C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom

Funding: Work supported by the German Doctoral Students program of the Federal Ministry of Education and Research (BMBF)
The surface resistance Rs of superconducting cavities can be obtained from the unloaded quality factor Q0. Since RS varies strongly over the cavity surface its value must be interpreted as averaged over the whole cavity surface. A more convenient way to investigate the surface resistance of superconducting materials is therefore to examine small samples, because they can be manufactured cheaply, duplicated easily and used for further surface analyses. At CERN a compact Quadrupole Resonator has been developed for the RF characterization of superconducting samples at different frequencies. In this contribution, results from measurements on bulk niobium and niobium film on copper samples are presented. Different models accounting for the field depended surface resistance are being confronted by the experimental results. The RF results are being correlated to surface analyses measurements carried out on the same samples.

Paper	Title	Page
MOOBA01	Thorium Energy Futures	29
	S. Peggs, W. Horak, T. Roser BNL, Upton, Long Island, New York, USA V.B. Ashley, R.F. Ashworth Jacobs Engineering, Pasadena, USA R.J. Barlow, R. Cywinski, R. Seviour University of Huddersfield, Huddersfield, United Kingdom J.-L. Biarrotte IPN, Orsay, France S. Henderson Fermilab, Batavia, USA A. Hutton JLAB, Newport News, Virginia, USA J. Kelly Thor Energy, Oslo, Norway M. Lindroos ESS, Lund, Sweden P.M. McIntyre Texas A&M University, College Station, Texas, USA A. Norlin IThEO, Sweden H.L. Owen STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom G.T. Parks University of Cambridge, Cambridge, United Kingdom
	The potential for thorium as an alternative or supplement to uranium in fission power generation has long been recognised, and several reactors, of various types, have already operated using thorium-based fuels. Accelerator Driven Subcritical (ADS) systems have benefits and drawbacks when compared to conventional critical thorium reactors, for both solid and molten salt fuels. None of the four options – liquid or solid, with or without an accelerator – can yet be rated as better or worse than the other three, given today's knowledge. We outline the research that will be necessary to lead to an informed choice.
	Slides MOOBA01 [3.887 MB]

WEPPC033	RF and Surface Properties of Bulk Niobium and Niobium Film Samples	2278
	T. Junginger, W. Weingarten CERN, Geneva, Switzerland R. Seviour University of Huddersfield, Huddersfield, United Kingdom C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom
	Funding: Work supported by the German Doctoral Students program of the Federal Ministry of Education and Research (BMBF) The surface resistance Rs of superconducting cavities can be obtained from the unloaded quality factor Q0. Since RS varies strongly over the cavity surface its value must be interpreted as averaged over the whole cavity surface. A more convenient way to investigate the surface resistance of superconducting materials is therefore to examine small samples, because they can be manufactured cheaply, duplicated easily and used for further surface analyses. At CERN a compact Quadrupole Resonator has been developed for the RF characterization of superconducting samples at different frequencies. In this contribution, results from measurements on bulk niobium and niobium film on copper samples are presented. Different models accounting for the field depended surface resistance are being confronted by the experimental results. The RF results are being correlated to surface analyses measurements carried out on the same samples.