High Dynamic Range Imaging of Magnetized Sheet Plasma

Rosario, Leo Mendel D.; Ting, Julie Anne; Viloan, Rommel Paulo B.; Suarez, Beverly Anne T.; Villamayor, Michelle Marie S.; Tumlos, Roy; Soriano, Maricor; Ramos, Henry J.

doi:10.1109/tps.2011.2163647

Cited by 3 publications

(1 citation statement)

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“…Multiple photographs of the scene are taken with varying exposure and merged into a single photograph with HDR radiance map. Rosario et al used this method to characterize luminous intensity distribution of a low-pressure steady-state magnetized plasma [3]. Figure 1 shows the low dynamic range (LDR) photos of a sheet plasma taken at various shutter speeds and the HDR image constructed from the LDR pictures.…”

Section: Introductionmentioning

confidence: 99%

Observation of Plasma-Facing-Wall via High Dynamic Range Imaging

Villamayor

Rosario

Viloan

et al. 2013

Plasma and Fusion Research

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Pictures of plasmas and deposits in a discharge chamber taken by varying shutter speeds have been integrated into high dynamic range (HDR) images. The HDR images of a graphite target surface of a compact planar magnetron (CPM) discharge device have clearly indicated the erosion pattern of the target, which are correlated to the light intensity distribution of plasma during operation. Based upon the HDR image technique coupled to colorimetry, a formation history of dust-like deposits inside of the CPM chamber has been recorded. The obtained HDR images have shown how the patterns of deposits changed in accordance with discharge duration. Results show that deposition takes place near the evacuation ports during the early stage of the plasma discharge. Discoloration of the plasma-facing-walls indicating erosion and redeposition eventually spreads at the periphery after several hours of operation.

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Section: Introductionmentioning

confidence: 99%