Munemasa Machida

• The role of higher diffraction order to determine ion temperature in vacuum ultraviolet region using multichannel detector., AR.EXT

• Abstract

  A DC/RF plasma device has been built to study: the VxI plasma production curve, hysteresis phenomenon at the dark to glow discharge transition, density and temperature differences and energy distribution at the glow discharge region will be studied, using RF and DC discharge, simultaneously or not. The main diagnostic tools will be the Langmuir probes and a visible multichannel spectromet…

  Study of RF with DC plasma discharges, AP.R

• Abstract

  A new modified branching ratio (MBR) method for the absolute intensity calibration of a vacuum ultraviolet (VUV) spectrometer is presented. The spectrometer is equipped with a multichannel detector, consisting of an open microchannel plate coupled to a charge-coupled device (CCD), or with a single channel photomultiplier. This technique extends the number of calibration points available f…

  Modified branching ratio method for abolute intensity calibration in VUV spectroscopy, PUB.ART

(Only some records are available in English at this moment)

• Abstract

  Among the different methods, alternative to induction, to drive current in magnetically confined plasmas, with aim to obtain a continuous operation of a possible fusion reactor, we seek to study that associated to traveling magnetic field produced by helicoidal coils carrying out of phase radiofrequency currents (double helix current drive). The method should allow compensating resistive …

  Current drive in reversed field pinches with traveling magnetic fields produced by helicoidal coils, BP.MS

• Abstract

  DC plasma discharge using different types of filling gas, electrode size and material will be analyzed during the breakdown and extinguish phase of discharge. Palm top visible spectrometer with CCD detector will be used to analyze the light emission throughout electrode region. The electron temperature and density will be measured using Langmuir probes at central position of the discharge…

  DC plasma discharge studies, BP.IC

• Abstract

  By the use of three visible spectrometer, one multichannel VUV spectrometer and one multichannel bolometer we study the whole plasma light radiation produced in the NOVA-UNICAMP tokamak. With this set up we can distinguish the light from discrete and continuous emissions originated at the central or border portions of tokamak plasma. The work can be applied into the TCABR tokamak. The mai…

  Study of tokamak plasma light radiation, BP.PD