Neutron and Proton Diagnostics for Pulsed Plasma Fusion Devices

Talebitaher, A.; Springham, S. V.

doi:10.1007/978-981-10-4217-1_6

Cited by 1 publication

(5 citation statements)

References 72 publications

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“…Using a larger area pinhole increases the number of collected protons, but at the cost of sacrificing image resolution. To overcome these limitations, the coded aperture imaging (CAI) technique was implemented [219,220] to image the fusion reaction zone for the 1.6 kJ NX2 PF operated in pure D 2 gas, or D 2 -Kr gas admixture [221,222], as discussed further in Section 4.3.2.…”

Section: Coded Aperture Imaging Of Fusion Protonsmentioning

confidence: 99%

“…In experimental terms, the coded aperture mask represents the physical embodiment of the CDS pattern: either transmitting, or stopping completely, each impinging proton. The coded mask patterns used in [219][220][221][222] are based on Singer CDS. Pulsed-laser machining was used to fabricate the coded masks in metal foil of sufficient thickness to stop~3 MeV DD fusion protons.…”

Section: Coded Aperture Imaging Of Fusion Protonsmentioning

confidence: 99%

“…These experiments are described in greater detail elsewhere [220]. Upgraded experiments followed [221,222], which used two CAI cameras positioned at 60 • to one another (in adjacent planes of a hexagonal holder) to capture sideon views of the fusion source simultaneously for the same PF shot. In order to validate the deconvolution procedures, the two cameras employed different Singer-CDS mask patterns, denoted Mask-1365 and Mask-4680.…”

Section: Coded Aperture Imaging Of Fusion Protonsmentioning

confidence: 99%

“…In order to validate the deconvolution procedures, the two cameras employed different Singer-CDS mask patterns, denoted Mask-1365 and Mask-4680. Figure 6.36 from Reference [222] shows details of the masks in their holder, and their position with respect to the PF anode. 32 × 10 −2 and 2.15 × 10 −2 sr, respectively, for source points near the axis of the plasma pinch.…”

Section: Coded Aperture Imaging Of Fusion Protonsmentioning

confidence: 99%

“…It is 8 mm away at 3.0 mbar, 15 mm away at 3.5 mbar, and not visible at higher pressure, probably formed outside the field view of the imaging camera.". (7) The time-integrated spatial distribution of D(d, p)T fusion reactions for pure D 2 gas, and D 2 -Kr gas admixture, was studied by using the proton-CAI technique to image individual NX2 plasma focus shots [219,221,222] as described in Section 3.2.5. CAI permits a high proton throughput to be obtained, counterbalancing the NX2 s modest proton yield per shot.…”

Section: Other Pf Devicesmentioning

confidence: 99%

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Update on the Scientific Status of the Plasma Focus

Auluck

Kubeš

Paduch

et al. 2021

Plasma

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This paper is a sequel to the 1998 review paper “Scientific status of the Dense Plasma Focus” with 16 authors belonging to 16 nations, whose initiative led to the establishment of the International Center for Dense Magnetized Plasmas (ICDMP) in the year 2000. Its focus is on understanding the principal defining characteristic features of the plasma focus in the light of the developments that have taken place in the last 20 years, in terms of new facilities, diagnostics, models, and insights. Although it is too soon to proclaim with certainty what the plasma focus phenomenon is, the results available to date conclusively indicate what it is demonstrably not. The review looks at the experimental data, cross-correlated across multiple diagnostics and multiple devices, to delineate the contours of an emerging narrative that is fascinatingly different from the standard narrative, which has guided the consensus in the plasma focus community for several decades, without invalidating it. It raises a question mark over the Fundamental Premise of Controlled Fusion Research, namely, that any fusion reaction having the character of a beam-target process must necessarily be more inefficient than a thermonuclear process with a confined thermal plasma at a suitably high temperature. Open questions that need attention of researchers are highlighted. A future course of action is suggested that individual plasma focus laboratories could adopt in order to positively influence the future growth of research in this field, to the general benefit of not only the controlled fusion research community but also the world at large.

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