scholarly journals Beam instability induced by space charge oscillation during final beam bunching for heavy ion inertial fusion

2004 ◽  
Vol 7 (3) ◽  
Author(s):  
Takashi Kikuchi ◽  
Mitsuo Nakajima ◽  
Kazuhiko Horioka ◽  
Takeshi Katayama
Keyword(s):  
Space Charge ◽  
Heavy Ion ◽  
Inertial Fusion ◽  
Beam Instability ◽  
Charge Oscillation

scholarly journals Irradiation of materials with short, intense ion pulses at NDCX-II

2017 ◽  
Vol 35 (2) ◽  
pp. 373-378 ◽  
Author(s):  
P.A. Seidl ◽  
J.J. Barnard ◽  
E. Feinberg ◽  
A. Friedman ◽  
E.P. Gilson ◽  
...  
Keyword(s):  
Space Charge ◽  
Focal Spot ◽  
Short Pulse ◽  
Ion Beam ◽  
Heavy Ion ◽  
Quantitative Comparison ◽  
Inertial Fusion ◽  
Ion Energy ◽  
Particle In Cell ◽  
Maximum Duration

AbstractWe present an overview of the performance of the Neutralized Drift Compression Experiment-II (NDCX-II) accelerator at Berkeley Lab, and report on recent target experiments on beam-driven melting and transmission ion energy loss measurements with nanosecond and millimeter-scale ion beam pulses and thin tin foils. Bunches with around 1011 ions, 1 mm radius, and 2–30 ns full width at half maximum duration have been created with corresponding fluences in the range of 0.1–0.7 J/cm2. To achieve these short pulse durations and mm-scale focal spot radii, the 1.1 MeV [megaelectronvolt (106 eV)] He+ ion beam is neutralized in a drift compression section, which removes the space charge defocusing effect during final compression and focusing. The beam space charge and drift compression techniques resemble necessary beam conditions and manipulations in heavy ion inertial fusion accelerators. Quantitative comparison of detailed particle-in-cell simulations with the experiment plays an important role in optimizing accelerator performance.

scholarly journals Experiments with space-charge-dominated beams for heavy ion fusion applications

2002 ◽  
Vol 20 (4) ◽  
pp. 599-602 ◽  
Author(s):  
P.G. O'SHEA ◽  
R.A. KISHEK ◽  
M. REISER ◽  
B. BEAUDOIN ◽  
S. BERNAL ◽  
...  
Keyword(s):  
Space Charge ◽  
Heavy Ion ◽  
Model System ◽  
Low Energy ◽  
Inertial Fusion ◽  
University Of Maryland ◽  
Strong Focusing ◽  
Fusion Applications ◽  
The University ◽  
Heavy Ion Fusion

A detailed understanding of the physics of space-charge-dominated beams is vital in the design of heavy ion inertial fusion (HIF) drivers. In that regard, low-energy, high-intensity electron beams provide an excellent model system. The University of Maryland Electron Ring (UMER), currently being installed, has been designed to study the physics of space-charge-dominated beams with extreme intensity in a strong focusing lattice with dispersion. At 10 keV and 100 mA, the beam from the UMER injector has a generalized perveance as much as 0.0015, corresponding to that of proposed HIF drivers. Though compact (11 m in circumference), UMER will be a very complex device by the time of its completion (expected 2003). We present an update on the construction as well as recent experimental results.

scholarly journals Heavy Ion Inertial Fusion

1992 ◽  
Vol 23 (5) ◽  
pp. 83-86 ◽  
Author(s):  
R. Bock
Keyword(s):  
Heavy Ion ◽  
Inertial Fusion

scholarly journals The high current experiment: First results

2002 ◽  
Vol 20 (3) ◽  
pp. 435-440 ◽  
Author(s):  
P.A. SEIDL ◽  
D. BACA ◽  
F.M. BIENIOSEK ◽  
A. FALTENS ◽  
S.M. LUND ◽  
...  
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Beam Steering ◽  
Fusion Energy ◽  
National Laboratory ◽  
Heavy Ion ◽  
High Current ◽  
Current Experiment ◽  
First Results ◽  
High Space

The High Current Experiment (HCX) is being assembled at Lawrence Berkeley National Laboratory as part of the U.S. program to explore heavy ion beam transport at a scale representative of the low-energy end of an induction linac driver for fusion energy production. The primary mission of this experiment is to investigate aperture fill factors acceptable for the transport of space-charge dominated heavy ion beams at high space-charge intensity (line-charge density ∼ 0.2 μC/m) over long pulse durations (>4 μs). This machine will test transport issues at a driver-relevant scale resulting from nonlinear space-charge effects and collective modes, beam centroid alignment and beam steering, matching, image charges, halo, lost-particle induced electron effects, and longitudinal bunch control. We present the first experimental results carried out with the coasting K+ ion beam transported through the first 10 electrostatic transport quadrupoles and associated diagnostics. Later phases of the experiment will include more electrostatic lattice periods to allow more sensitive tests of emittance growth, and also magnetic quadrupoles to explore similar issues in magnetic channels with a full driver scale beam.

scholarly journals Driver Technology for Inertial Fusion Research Introduction. Heavy Ion Beam Drivers.

1999 ◽  
Vol 75 (2) ◽  
pp. 121-125
Author(s):  
Masao OGAWA ◽  
Kazuhiko HORIOKA ◽  
Toshiyuki HATTORI
Keyword(s):  
Ion Beam ◽  
Heavy Ion ◽  
Inertial Fusion ◽  
Fusion Research ◽  
Heavy Ion Beam
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