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Development of heavy ion induction linear accelerators as drivers for inertial confinement fusion

Description: There is a continuing study in the USA of the feasibility of an induction linac fusion driver, which would accelerate multiple heavy-ion beams through a sequence of pulsed transformers and amplify the beam current during acceleration. The driver cost could be $200/Joule or less and the cost of electricity in the range of .050-.055$/kWhr. As a next stage of development to assess the feasibility of this approach we propose an ''Induction Linac Systems Experiment''. This will test some of the technology and multiple-beam manipulations necessary for a fusion driver. 7 refs., 1 fig.
Date: June 1, 1988
Creator: Warwick, A.I.; Celata, C.; Faltens, A.; Fessenden, T.J.; Judd, D.L.; Keffe, D. et al.
Partner: UNT Libraries Government Documents Department

Comparison of the design and costs of induction linac drivers for inertial fusion using ions of mass 133 and 200

Description: Optimized cost estimates for induction linac accelerators using mass 133 ions at a charge state of +2 producing inertial fusion target yields of 300, 600, and 1200 MJ are presented. The ions are injected into the accelerator at 3 MV, and accelerated to the required voltage appropriate to the desired target yield. A cost comparison of these drivers is made with drivers using mass 200, charge state +3 ions for several target yields and a fusion power of 3000 MW.
Date: June 1, 1986
Creator: Hovingh, J.; Brady, V.O.; Faltens, A. & Lee, E.P.
Partner: UNT Libraries Government Documents Department

Linear induction accelerator parameter options

Description: The principal undertaking of the Beam Research Program over the past decade has been the investigation of propagating intense self-focused beams. Recently, the major activity of the program has shifted toward the investigation of converting high quality electron beams directly to laser radiation. During the early years of the program, accelerator development was directed toward the generation of very high current (>10 kA), high energy beams (>50 MeV). In its new mission, the program has shifted the emphasis toward the production of lower current beams (>3 kA) with high brightness (>10/sup 6/ A/(rad-cm)/sup 2/) at very high average power levels. In efforts to produce these intense beams, the state of the art of linear induction accelerators (LIA) has been advanced to the point of satisfying not only the current requirements but also future national needs.
Date: April 21, 1986
Creator: Birx, D.L.; Caporaso, G.J. & Reginato, L.L.
Partner: UNT Libraries Government Documents Department

Comparison of the design and costs of induction linac drivers for inertial fusion using ions of differing mass

Description: An induction linear accelerator that produces an energetic (5 to 20 GeV) beam of heavy (130 to 238 amu) ions is a prime candidate as a driver for inertial fusion. The required accelerator output parameters for an ion species can be determined from the target requirements for a given fusion energy yield. The cost and efficiency of various accelerator configurations to produce the required output parameters can be determined to aid in the selection of the lowest cost accelerator design option. In this study, we compare the cost of various accelerator configurations that will produce various target fields and fusion powers using cesium 133 ions with those using mercury 200 ions, and report extensively on some 600 MJ target yield results.
Date: January 1, 1986
Creator: Hovingh, J.; Brady, V.O.; Faltens, A. & Lee, E.P.
Partner: UNT Libraries Government Documents Department

Experiments and prospects for induction linac drivers

Description: In the last three years, the US program in Heavy Ion Fusion has concentrated on understanding the induction linac approach to a power-plant driver. In this method it is important that the beam current be maximized throughout the accelerator. Consequently, it is crucial to understand the space-charge limit in the AG transport system in the linac and, also, to achieve current amplification during acceleration to keep pace with the kinematical increase of this limit with energy. Experimental results on both these matters and also on the use of multiple beams (inside the same accelerating structure) will be described. A new examination of the most attractive properties of the induction linac for a fusion driver has clearly pointed to the advantage of using heavy ions with a charge-state greater than unity - perhaps q = 3 may be an optimum. This development places even greater importance on understanding space-charge limits and mechanisms for emittance growth; also, it will require a new emphasis on the development of a suitable ion source.
Date: May 1, 1986
Creator: D., Keefe
Partner: UNT Libraries Government Documents Department

Highlights of the heavy ion fusion symposium

Description: The current status and prospects for inertial confinement fusion based on the use of intense beams of heavy ions will be described in the light of results presented at the International Symposium on Heavy Ion Fusion, (Washington, DC, May 27-29, 1986).
Date: July 1, 1986
Creator: Keefe, D.
Partner: UNT Libraries Government Documents Department

Preliminary results from MBE-4: a four beam induction linac for heavy ion fusion research

Description: Preliminary results are presented from a scaled experimental multiple beam induction linac. This experiment is part of a program of accelerator research for heavy ion fusion. It is shown that multiple beams can be accelerated without significant mutual interaction. Measurements of the longitudinal dynamics of a current-amplifying induction linac are presented and compared to calculations. Coupling of transverse and longitudinal dynamics is discussed.
Date: May 1, 1986
Creator: Fessenden, T.J.; Judd, D.L.; Keefe, D.; Kim, C.; Laslett, L.J.; Smith, L. et al.
Partner: UNT Libraries Government Documents Department

Preliminary design of a 10 MV ion accelerator

Description: At the low energy end of an induction linac HIF driver the beam current is limited by our ability to control space charge by a focusing system. As a consequence, HIF induction accelerator designs feature simultaneous acceleration of many beams in parallel within a single accelerator structure. As the speed of the beams increase, the focusing system changes from electrostatic to magnetic quadrupoles with a corresponding increase in the maximum allowable current. At that point the beams are merged thereby decreasing the cost of the subsequent accelerator structure. The LBL group is developing an experiment to study the physics of merging and of focusing ion beams. In the design, parallel beams of ions (C/sup +/, Al/sup +/, or Al/sup + +/) are accelerated to several MV and merged transversely. The merged beams are then further accelerated and the growth in transverse and longitudinal emittance is determined for comparison with theory. The apparatus will then be used to study the problems associated with focusing ion beams to a small spot. Details of the accelerator design and considerations of the physics of combining beams are presented.
Date: June 1, 1986
Creator: Fessenden, T.J.; Celata, C.M.; Faltens, A.; Henderson, T.; Judd, D.L.; Keefe, D. et al.
Partner: UNT Libraries Government Documents Department

Beam dynamics in heavy ion induction LINACS

Description: Interest in the use of an induction linac to accelerate heavy ions for the purpose of providing the energy required to initiate an inertially confined fusion reaction has stimulated a theoretical effort to investigate various beam dynamical effects associated with high intensity heavy ion beams. This paper presents a summary of the work that has been done so far; transverse, longitudinal and coupled longitudinal transverse effects are discussed.
Date: October 1, 1981
Creator: Smith, L.
Partner: UNT Libraries Government Documents Department

Engineering systems designs for a recirculating heavy ion induction accelerator

Description: Recirculating heavy ion induction accelerators are being investigated as possible drivers for heavy ion fusion. Part of this investigation has included the generation of a conceptual design for a recirculator system. This paper will describe the overall engineering conceptual design of this recirculator, including discussions of the dipole magnet system, the superconducting quadrupole system and the beam acceleration system. Major engineering issues, evaluation of feasibility, and cost tradeoffs of the complete recirculator system will be presented and discussed. 5 refs., 4 figs.
Date: May 1, 1991
Creator: Newton, M.A.; Barnard, J.J.; Reginato, L.L. & Yu, S.S.
Partner: UNT Libraries Government Documents Department

Design of a 12. 5 MHz Wideroee linac for ion beam fusion

Description: Argonne National Laboratory (ANL) is currently developing a heavy ion beam driver for the inertial confinement fusion (ICF) program. The R and D program has as its goal to store a Xe/sup +8/ beam of 220 MeV by October 1982. The preaccelerator is on station and near to meeting its design of 50 mA of Xe/sup +1/ at 1.5 MV. The first section of the low beta linac which is to accelerate 20 mA of Xe/sup +1/ to 2.32 MeV consists of four independently phased short resonators. Two of the four short resonators have been tested beyond the rf linac power requirements without breakdown or any major difficulties. The remaining two are currently being fabricated. The next section of the linac consists of three double-stub 12.5 MHz Wideroee linacs to accelerate the beam to 22.48 MeV. The first and third tank of the Wideroee array uses non-conventional FOFODODO quadrupole focussing while the second tank uses FODO focussing. A pulsed quadrupole design has been selected for the Wideroee tanks because of the high power requirement of conventional dc quadrupoles. At 22.48 MeV the beam is to be stripped to charge state +8 and accelerated in an array of 25 MHz triple-stub Wideroee linacs to 220 MeV and then injected into a storage ring.
Date: January 1, 1979
Creator: Moretti, A.; Watson, J.M.; Stockley, R.J.; Moenich, J.S.; Lari, R.J.; Khoe, T.K. et al.
Partner: UNT Libraries Government Documents Department

Preliminary design for a recirculating induction accelerator for heavy ion fusion

Description: Substantial savings in size and cost over a linear machine may be achieved in an induction accelerator in which a heavy ion beam makes many ({approximately}50) passes through one or more circular accelerators. We examine a point design for such an accelerator, consisting of four rings. We discuss the consequences of this design on emittance growth, longitudinal instability growth, vacuum requirements, pulser requirements, pulsed-magnet requirements, acceleration schedule, and cost. 3 refs., 1 tab.
Date: December 1, 1990
Creator: Yu, S.S.; Barnard, J.J.; Caporaso, G.J.; Friedman, A.; Hewett, D.W.; Kirbie, H. et al.
Partner: UNT Libraries Government Documents Department