Heavy Ion Fusion Accelerator Research (HIFAR) Year-end Report PDF Download
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Author: Lawrence Berkeley Laboratory. Accelerator & Fusion Research Division. Heavy Ion Fusion Staff
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Category :
Languages : en
Pages : 28
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Book Description
Author: Lawrence Berkeley Laboratory. Accelerator & Fusion Research Division. Heavy Ion Fusion Staff
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
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Category : Power resources
Languages : en
Pages : 592
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Category :
Languages : en
Pages :
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Activities are reported on MBE-4, the four-beam proof-of-principle ion induction linear accelerator with the capability of beam-current amplification. Mechanical aspects of MBE-4, quadrupole insulator performance, and pulsers are discussed. The computer code, SLID, has been used to help understand the longitudinal beam dynamics in MBE-4. A computer-controlled emittance scanning system is in use in MBE-4. A systematic effort is under way to discover and correct all the defects peculiar to the low energy part of the linac design code. (LEW).
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Category :
Languages : en
Pages :
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The heavy ion accelerator is profiled. Energy losses, currents, kinetic energy, beam optics, pulse models and mechanical tolerances are included in the discussion. In addition, computational efforts and an energy analyzer are described. 37 refs., 27 figs. (WRF).
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Category : Power resources
Languages : en
Pages : 908
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Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
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Category : Government reports announcements & index
Languages : en
Pages : 1428
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Category :
Languages : en
Pages :
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A beam propagation experiment is being prepared to test theoretical predictions about transverse instabilities in a heavy ion beam with large space-charge effects in a long quadrupole transport system. The 200 keV injector which has the features of variable current density and variable emittance has been constructed. The Cs pulsed drift tube injector model continues to operate for studies of beam optics, component testing in an intense ion-beam environment, and diagnostics development. The electron-beam probe has now yielded successful results on the time-resolved charge density of the Cs ion-beam. It has revealed the existence of a significant number of electrons surrounding the ion-beam. The theory of longitudinal instabilities has been advanced. Improvements to the EGUN and other beam-dynamics codes continue and have yielded valuable results. Transport of high-intensity beams in an A.G. octupole system is under active study.
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Category : Science
Languages : en
Pages : 1394
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Author: Lawrence Berkeley Laboratory. Heavy Ion Fusion Staff
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Category : Heavy ion fusion reactions
Languages : en
Pages : 24
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Highlights from this reporting period are as follows: (1) the 200 keV cesium ion injector for the Single Beam Transport Experiment has been operated extensively in development and measurement of the quadrupole matching system and beam emittance control. Construction of the complete transport system is well advanced; (2) beam diagnostic tools continue to be improved. The electron beam probe has been used extensively to study ion beams in varying stages of charge neutralization. Development of systems using scintillators and the EG and G Optical Multichannel Analyzer (OMA-2) continues; (3) the Long-Pulse Induction Module (LPIM) is in the final stages of construction. A two-core prototype test cell has been assembled and tested to nearly 106 pulses. Development of both the switch tube (ignitron) and pulse-forming network has proceeded rapidly and successfully; (4) silica-loaded polymer insulator development is continuing at a low level; and (5) theoretical studies of longitudinal beam bunch dynamics using I. Haber's computer simulation code, quadrupole and octupole transport channels and solenoid focussing channels using neutralized beams have received considerable emphasis during this time. The exploration of possible induction linac parameters for a High Temperature experiment (HTE) is continuing.
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Languages : en
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Some highlights of the program during this reporting period are as follows: (1) First results with the completed apparatus of the Single Beam Transport Experiment (SBTE) have shown the stable propagation of a space-charge-dominated cesium-ion beam through 41 periods of an AG focussing lattice. The space-charge effects were large enough to depress the betatron phase advance per cell from sigma0 = 60° to sigma = 12°. (2) Understanding of the reflection stabilization of longitudinal instability in a high-current beam bunch has been improved by analytical and computational studies. (3) Conceptual design studies of a multiple-beam ion induction linac suitable for the High Temperature Experiment have progressed to the stage where a first reference design (sodium, 125 MeV, 30 .mu. C, 16 beams) is available. (4) The Long-Pulse Induction Accelerating Unit, first used to accelerate a cesium-ion beam in February 1983, has been undergoing modification in the low-level trigger circuitry to allow more precisely controlled waveform synthesis.
