On the propagation of energetic ion beams through a fusion target chamber

1978 ◽  
Vol 19 (1) ◽  
pp. 97-119 ◽  
Author(s):  
S. Jorna ◽  
W. B. Thompson
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Heavy Ion ◽  
Ion Beams ◽  
Target Chamber ◽  
Uranium Ions ◽  
Fusion Target ◽  
Heavy Ion Beam ◽  
The Stability ◽  
Stream Type

This article treats some aspects of the propagation of a highly energetic heavy ion beam through a fusion target chamber. The stability of this beam to various perturbations is especially emphasized, first for vacuum propagation, and then for propagation through a background plasma. The results are illustrated by detailed calculations for a beam carrying 3 kA of current and consisting of 70GeV, singly ionized uranium ions. We find that such a beam will propagate stably through the target chamber. As a second example we have applied some of our results to the recently proposed I53+ concept in which up to a hundred beams of 40GeV iodine ions each carrying 4.2 kA of current are directed to the target. Our conclusions for this case are less optimistic, as such beams are likely to be subject to space-charge problems due to the increased value of v/γ and are prone to instabilities of the two-stream type.

Simulations of intense heavy ion beams propagating through a gaseous fusion target chamber

2002 ◽  
Vol 9 (5) ◽  
pp. 2344-2353 ◽  
Author(s):  
D. R. Welch ◽  
D. V. Rose ◽  
B. V. Oliver ◽  
T. C. Genoni ◽  
R. E. Clark ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Ion Beams ◽  
Target Chamber ◽  
Fusion Target

scholarly journals Design, development, and testing of non-intercepting profile diagnostics for intense heavy ion beams using a capacitive pickup and beam induced gas fluorescence monitors

2006 ◽  
Vol 24 (4) ◽  
pp. 541-551 ◽  
Author(s):  
F. BECKER ◽  
A. HUG ◽  
P. FORCK ◽  
M. KULISH ◽  
P. NI ◽  
...  
Keyword(s):  
Focal Plane ◽  
Energy Deposition ◽  
Ion Beam ◽  
Heavy Ion ◽  
High Energy ◽  
Ion Beams ◽  
High Energy Density ◽  
Design Development ◽  
Heavy Ion Beam ◽  
Beam Parameters

An intense and focused heavy ion beam is a suitable tool to generate high energy density in matter. To compare results with simulations it is essential to know beam parameters as intensity, longitudinal, and transversal profile at the focal plane. Since the beam's energy deposition will melt and evaporate even tungsten, non-intercepting diagnostics are required. Therefore a capacitive pickup with high resolution in both time and space was designed, built and tested at the high temperature experimental area at GSI. Additionally a beam induced fluorescence monitor was investigated for the synchrotron's (SIS-18) energy-regime (60–750 AMeV) and successfully tested in a beam-transfer-line.

scholarly journals Preheating of heavy-ion-beam targets by secondary particles

1992 ◽  
Vol 10 (1) ◽  
pp. 189-200 ◽  
Author(s):  
M. M. Basko
Keyword(s):  
Ion Beam ◽  
Nuclear Fission ◽  
Heavy Ion ◽  
Ion Beams ◽  
X Ray ◽  
Fission Fragments ◽  
Secondary Particles ◽  
The Face ◽  
Heavy Ion Beam

The contribution of different sorts of secondary particles to the preheating of thermonuclear targets driven by heavy-ion beams is analyzed. Two types of illumination geometry are considered: side-on and face-on locations of the fuel with respect to the ion beam. It is shown that a substantial preheating can be expected from (1) nuclear fission fragments for the face-on fuel position and (2) δ-electrons and low-Z nuclear fragments for the side-on fuel location. All the X-ray and gamma photons of various origin are shown to produce a negligible fuel heating.

Meter-long plasma source for heavy ion beam space charge neutralization

2007 ◽  
Author(s):  
Philip C. Efthimion ◽  
Erik P. Gilson ◽  
Ronald C. Davidson ◽  
Larry Grisham ◽  
B. Grant Logan ◽  
...  
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Plasma Source ◽  
Heavy Ion ◽  
Charge Neutralization ◽  
Heavy Ion Beam

scholarly journals Compression of a cylindrical hydrogen sample driven by an intense co-axial heavy ion beam

2005 ◽  
Vol 23 (2) ◽  
pp. 137-142 ◽  
Author(s):  
M. TEMPORAL ◽  
J. J. LOPEZ CELA ◽  
A. R. PIRIZ ◽  
N. GRANDJOUAN ◽  
N. A. TAHIR ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Ion Beam ◽  
Heavy Ion ◽  
Cylindrical Sample ◽  
Ion Distribution ◽  
Gold Target ◽  
Hydrogen Density ◽  
Uranium Ions ◽  
Heavy Ion Beam ◽  
Uranium Beam

The compression of a cryogenic hydrogen cylindrical sample contained in a hollow gold target driven by an intense co-axial uranium beam has been studied. The ion distribution is assumed to be Gaussian in space and parabolic in time. The hydrodynamics of the target is analyzed by means of one- and two-dimensional numerical simulations. A parametric study is performed to achieve the maximum average hydrogen density and temperature as a function of the sample radius, total number of ions and spread of the spatial ion distribution. A window in the beam-target parameters for which hydrogen compression is higher than a factor of 10 and temperature is below 0.2 eV has been found by considering a single bunch that contains 2 × 1011 uranium ions delivered in 100 ns. In this range of high densities and low temperatures, it is expected that hydrogen may become metallic.

scholarly journals Ferroelectric plasma source for heavy ion beam space charge neutralization

2007 ◽  
Vol 577 (1-2) ◽  
pp. 203-206 ◽  
Author(s):  
Philip C. Efthimion ◽  
Erik P. Gilson ◽  
Ronald C. Davidson ◽  
Larry Grisham ◽  
B. Grant Logan ◽  
...  
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Plasma Source ◽  
Heavy Ion ◽  
Charge Neutralization ◽  
Heavy Ion Beam

scholarly journals Rayleigh-Taylor instability study for heavy-ion beam driven, high-gain ICF implosions

1992 ◽  
Vol 10 (3) ◽  
pp. 447-459 ◽  
Author(s):  
A. Caruso ◽  
V. A. Pais ◽  
A. Parodi
Keyword(s):  
Ion Beam ◽  
Fusion Energy ◽  
Heavy Ion ◽  
High Gain ◽  
Ion Energy ◽  
Radiative Model ◽  
Rayleigh Taylor Instability ◽  
Heavy Ion Beam ◽  
Energy Gains ◽  
The Stability

We carried out a numerical analysis on the stability of targets designed to produce fusion energy gains close to 100 when irradiated with an appropriate heavy ion beam. To reach such performances, we found that a high-Z radiation shield was necessary to screen the DT fuel from the radiation coming from the surrounding hot material. As opacity of high-Z materials is only weakly density dependent, we considered targets with lead shields both at solid density and with a density equivalent to that of the contiguous external material. The behaviour of both kinds of targets has been studied by introducing a small spatial nonuniformity on the external surface of the lead shield. Targets with low-density shields have been tested with a beam intensity perturbation, too. Because density gradients are very sharp and ablation is practically absent, we have found these implosions to be Rayleigh-Taylor unstable. The evolution has been followed in the nonlinear regime because the full hydrodynamical-radiative model with a nonlinear heavy ion energy deposition and mesh correction was used.

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