New type of pulsed ion source with cryogenic anode

Kasuya, Koichi; Horioka, Kazuhiko; Takahashi, Tsutomu; Urai, A.; Hijikawa, M.

doi:10.1063/1.92595

Cited by 16 publications

(2 citation statements)

References 2 publications

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“…Similar techniques had been applied successfully to ion diodes in creating high purity ion beams. 24, 25, Although we were successful in demonstrating the capability to coat out thick uniform layers ( > 100 microns) of H 2 and D 2 , the beam experiments on RITS-3 behaved anomalously and shorted out very quickly at modest magnetic fields > 4 T. It is speculated that some mechanism related to the pulsed magnetic field liberated gas into the diode region during the rise of the magnetic field (time to peak ~ 15 ms) and caused the diode to short when the main accelerator pulse arrived at the diode. These results are discussed in more detail in Appendix I. Additionally, some interesting results including preliminary spectroscopic measurements were obtained at 4 T for frozen D 2 and other cryogenic anodes including Ne and are discussed in Appendices I and J.…”

Section: Anode Materials Variationsmentioning

confidence: 99%

Operational characteristics and analysis of the immersed-Bz diode on RITS-3.

Bruner¹,

Oliver²,

Portillo³

et al. 2006

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The immersed-B z diode is being developed as a high-brightness, flash x-ray radiography source. This diode is a foil-less electron-beam diode with a long, thin, needle-like cathode inserted into the bore of a solenoid. The solenoidal magnetic field guides the electron beam emitted from the cathode to the anode while maintaining a small beam radius. The electron beam strikes a thin, high-atomic-number anode and produces bremsstrahlung. We report on an extensive series of experiments where an immersed-B z diode was fielded on the RITS-3 pulsed power accelerator, a 3-cell inductive voltage generator that produced peak voltages between 4 and 5 MV, ~140 kA of total current, and power pulse widths of ~50 ns. The diode is a high impedance device that, for these parameters, nominally conducts ~30 kA of electron beam current. Diode operating characteristics are presented and two broadly characterized operating regimes are identified: a nominal operating regime where the total diode current is characterized as classically bipolar and an anomalous impedance collapse regime where the total diode current is in excess of the bipolar limit and up to the full accelerator current. The operating regimes are approximately separated by cathode diameters greater than ~3 mm for the nominal regime and less than ~ 3 mm for the anomalous impedance collapse regime. This report represents a compilation of data taken on RITS-3. Results from key parameter variations are presented in the main body of the report and include cathode diameter, anode-cathode gap, and anode material. Results from supporting parameter variations are presented in the appendices and include magnetic field strength, prepulse, pressure and accelerator variations. Comparisons with analytic and computational models are discussed.

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Section: Anode Materials Variationsmentioning

confidence: 99%

Operational characteristics and analysis of the immersed-Bz diode on RITS-3.

Bruner¹,

Oliver²,

Portillo³

et al. 2006

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“…In Ion Beam (IB) Inertial Confinement Fusion (ICF), the main research issues include 1) the IB production [1][2][3] and the IB focusing, 2) the IB transportation [4][5][6][7][8][9] in an IB-ICF reactor and 3) the target physics, as well as 4) the reactor issuess. The first and second points has been studied [1][2][3][4][5][6][7][8][9] . In this paper the third point of the fuel target physics is treated theoretically.…”

Section: Introductionmentioning

confidence: 99%

Uniform fuel target implosion in heavy ion inertial fusion

Kawata

Karino

Kondo

et al. 2016

J. Phys.: Conf. Ser.

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The numerical results for the fuel target implosion are presented in order to clarify the target physics in ion beam inertial fusion. The numerical analyses are performed for a direct-driven ion beam target. In the paper the following issues are studied: the beam obliquely incidence on the target surface, the plasma effect on the beam-stopping power, the beam particle energy, the beam time duration, the target radius, the beam input energy and the non-uniformity effect on the fuel target performance. In this paper the beam ions are protons.

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I.2.2. Light ion-beam fusion

Yatsui

Tazima

1983

J Fusion Energ

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New type of pulsed ion source with cryogenic anode

Cited by 16 publications

References 2 publications

Operational characteristics and analysis of the immersed-Bz diode on RITS-3.

Operational characteristics and analysis of the immersed-Bz diode on RITS-3.

Uniform fuel target implosion in heavy ion inertial fusion

I.2.2. Light ion-beam fusion

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