scholarly journals The main regularities of core-halo formation in space charge-dominated ion beam

2003 ◽  
Author(s):  
B.I. Bondarev ◽  
A.P. Durking ◽  
I.L. Korenev ◽  
I.V. Shumakov ◽  
S.V. Vinogradov
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Halo Formation

scholarly journals Reactive medium instability of the space charge wave of ion beam in a plasma

1977 ◽  
Vol 64 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Toshitaka Idehara ◽  
Kuni Nakajima ◽  
Yoshio Ishida
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Reactive Medium ◽  
Charge Wave ◽  
Space Charge Wave

Simulation of space charge compensation in a multibeamlet negative ion beam

2016 ◽  
Vol 87 (2) ◽  
pp. 02B917 ◽  
Author(s):  
E. Sartori ◽  
T. J. Maceina ◽  
P. Veltri ◽  
M. Cavenago ◽  
G. Serianni
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Charge Compensation ◽  
Negative Ion

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.

Study on space charge compensation in negative hydrogen ion beam

2016 ◽  
Vol 87 (2) ◽  
pp. 02B915 ◽  
Author(s):  
A. L. Zhang ◽  
S. X. Peng ◽  
H. T. Ren ◽  
T. Zhang ◽  
J. F. Zhang ◽  
...  
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Charge Compensation ◽  
Hydrogen Ion ◽  
Negative Hydrogen Ion

Particle-in-cell techniques for the study of space charge effects in an electrostatic ion beam trap

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Dhanoj Gupta ◽  
Raj Singh ◽  
Ryan Ringle ◽  
Catherine R. Nicoloff ◽  
Igor Rahinov ◽  
...  
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Space Charge Effects ◽  
Charge Effects ◽  
Particle In Cell

scholarly journals High-intensity pulsed ion beam focusing by its own space charge

2018 ◽  
Vol 36 (4) ◽  
pp. 470-476 ◽  
Author(s):  
X.P. Zhu ◽  
Q. Zhang ◽  
L. Ding ◽  
C.C. Zhang ◽  
Yu. Isakova ◽  
...  
Keyword(s):  
Energy Density ◽  
Space Charge ◽  
High Intensity ◽  
Ion Beam ◽  
Beam Focusing ◽  
Ion Focusing ◽  
Metal Grid ◽  
Low Energy Electrons ◽  
Transport Region ◽  
Total Divergence

AbstractThe paper presents the results of a study on propagation and focusing of high-intensity pulsed ion beams, produced by a self-magnetically insulated diode of semi-cylindrical geometry at the TEMP-6 accelerator (120 ns, 200–250 kV). We examined the space-charge neutralization of the beam, the energy density in the focus, the divergence of the beam, and its shot-to-shot displacement in the focal plane. It is found that the concentration of low-energy electrons in the beam is 1.3–1.5 times higher than the concentration of ions. We observed additional ion focusing by its own space charge. With an increase in the density of the net negative (electrons and ions) charge of the beam from 3.6 to 9 µC/cm2, the total divergence (the sum of the beam divergence in the vertical and horizontal planes) decreases from 11.4 to 4.5°. It leads to an increase in the energy density in the focus from 4 up to 10–12 J/cm2. To increase the electrons concentration in the beam, a metal grid installed in the ion beam transport region was used.

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.

Space charge compensation of low energy ion beam

2002 ◽  
Vol 73 (2) ◽  
pp. 995-997 ◽  
Author(s):  
V. Dudnikov ◽  
A. Dudnikov
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Charge Compensation ◽  
Low Energy
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