Regular Articles

Full Text / References

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

Michelle Marie S. VILLAMAYOR¹⁾, Leo Mendel D. ROSARIO^1,2), Rommel Paulo B. VILOAN¹⁾, Ma. Camille C. LACDAN¹⁾, Julie Anne S. TING¹⁾, Beverly Anne T. SUAREZ¹⁾, Shuichi KATO³⁾, Roy B. TUMLOS⁴⁾, Maricor N. SORIANO¹⁾, Motoi WADA³⁾ and Henry J. RAMOS¹⁾

1)

National Institute of Physics, University of the Philippines, Diliman, Quezon City 1101, Philippines

2)

Sciences Department, College of Arts Sciences and Education, FEATI University, Manila City 1003, Philippines

3)

Graduate School of Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan

4)

Department of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines, Manila, Manila City 1000, Philippines

(Received 7 December 2012 / Accepted 26 June 2013 / Published 26 September 2013)

Abstract

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.

Copyright (c) 2013 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

high dynamic range imaging, plasma dust-like deposit, plasma imaging, carbon sputtering, colorimetry

DOI: 10.1585/pfr.8.2401116

Full Text

PDF format (1.4Mbytes)

References

• [1] P.E. Debevec and J. Malik, Recovering High Dynamic Range Radiance Maps from Photographs, University of California at Berkeley, ACM SIGGRAPH 2008 Classes, 31 (2008).
• [2] D.B. Kim, K.S. Park, K.Y. Kim, M.K. Seo and K.H. Lee, Opt. Eng. 48, 093601 (2009).
• [3] L.M.D. Rosario, J.A.S. Ting, R.P.B. Viloan, B.A.T. Suarez, M.M.S. Villamayor, R.B. Tumlos, M.N. Soriano and H.J. Ramos, IEEE Trans. Plasma Sci. 39, Part 1, 2492 (2011).
• [4] C. Bonte, M. Harmand, F. Dorchies, S. Magnan, V. Pitre, J.-C. Kieffer, P. Audebert and J.-P. Geindre, Rev. Sci. Instrum. 78, 043501 (2007).
• [5] P. Wienhold and F. Weschenfelder, Vacuum 47, 919 (1996).
• [6] M. Soriano, B. Martinkauppi, S. Houvinen and M. Laaksonen, Pattern Recognition 36, 681 (2003).

This paper may be cited as follows:

Michelle Marie S. VILLAMAYOR, Leo Mendel D. ROSARIO, Rommel Paulo B. VILOAN, Ma. Camille C. LACDAN, Julie Anne S. TING, Beverly Anne T. SUAREZ, Shuichi KATO, Roy B. TUMLOS, Maricor N. SORIANO, Motoi WADA and Henry J. RAMOS, Plasma Fusion Res. 8, 2401116 (2013).