Ion-beam and neutron production in a low-energy plasma focus

Kelly, H.; Márquez, A.

doi:10.1088/0741-3335/38/11/005

Cited by 63 publications

(36 citation statements)

References 25 publications

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“…4 MeV deuterons can produce tracks of similar depth to 3 MeV protons). However experiments have shown that for forward angles (*45°or less) proton energies are predominantly in the 3-4 MeV range [8], and that the number of deuterons with energies above 3.0 MeV is far fewer than the number of fusion protons [9]. In this situation, deuterons with just sufficient energy to pass through the Kapton film can be identified from the resulting bright shallow etched tracks they produce.…”

Section: Methodsmentioning

confidence: 99%

Imaging of Plasma Focus Fusion by Proton Coded Aperture Technique

et al. 2011

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The coded aperture imaging (CAI) technique has been applied to investigate the spatial distribution of DD fusion in a deuterium filled 1.6 kJ plasma focus (PF) device operated in its neutron-optimized regime. The coded mask has been fabricated in Havar alloy with 20 9 20 pixels and 57 square holes (14% open area) using a Singer-set Cyclic Difference pattern. Five CAI cameras were employed simultaneously: one placed on-axis (0°) and four at 45°to the PF axis. CR-39 polymer nuclear track detectors were used to register proton tracks from D(d,p)T reactions. The detectors were covered by 75 lm Kapton film to stop all energetic charged particles (mostly deuterons) other than the 3 MeV fusion protons. A de-convolution algorithm was applied to the measured proton track coordinates to obtain images of the fusion source from the five directions. Typically (2-8) 9 10 4 proton tracks were registered by each detector per shot. Also two beryllium fast-neutron detectors were employed simultaneously to measure the associated neutron yield and anisotropy. The CAI images show the fusion source is a cigar-shaped region around the pinch column with no indication of plasma column instabilities. The proton anisotropy is comparable to the measured neutron anisotropy.

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Section: Methodsmentioning

confidence: 99%

Imaging of Plasma Focus Fusion by Proton Coded Aperture Technique

et al. 2011

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“…Another intriguing opportunity is the possibility of optimizing axial beam production in a DPF for providing MeV beams Experimentally, on smaller devices with capacitor energies in the kJ regime, the measured axial ions have energies in the low hundreds of keV range [11,24,26]. On larger devices with capacitor energies in the 10-100 kJ range, such as the Livermore DPF,~10 14 ions with energies greater than 330 keV were detected for each pulse.…”

Section: As An Advanced Accelerator Technologymentioning

confidence: 99%

Review of Dense Plasma Focus Technology for Intense and Directional Neutron Sources

Tang¹,

Rusnak²

2008

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“…Typical ion fluences produced in the PF devices are 10 18 -10 20 ions/m 2 for 100 of ns to a few s time duration. The energy of ions varies from a few 100s of eV to MeV and the mean energy of ions is around 100 keV [11][12][13][14][15][16][17] depending on the operation and geometrical parameters of the PF devices. The accelerated ions produced in the PF devices are useful in applications [18][19][20][21][22][23][24] for material science, e.g.…”

Section: Introductionmentioning

confidence: 99%