PHYSICS Colloquium(09/3/27)

"         “Introduction to x-ray Imagin Diagnostics for Fusion Plasmas”
  
Speaker : Dr. Sang Gon Lee [Natl Fusion Research Inst.]
Place : Physics Seminar Room (Science Bldg, 3-201)
Date & Time : Mar. 27(Fri)  4:00 ~ 5:00 pm

  
Abstract
  
This curriculum will give an introduction to recently developed passive x-ray imaging
Diagnostics for fusion plasmas.  A new type of  x-ray  imaging crystal  spectrometer
(XICS) has been developed to measure ion/electron temperature and plasma rotation
profiles in tokamak plasmas. The XICS instrument records spectra of highly-charged
impurity ions for Doppler width and its shift measurements  simultaneously.  Another
x-ray imaging diagnostic approaches an energy and time resolved two-dimensional
fast imaging technique. It is based on a fast micropattern gas detector with gas of the
electron multiplier (GEM) as amplifying stage and pixel readout to measure 2D images
core x-ray emissions.  The advanced GEM detector will be applied to the  XICS and
many other fields of plasma research since it is very relevant for the diagnosis of ITER
and future burning plasma experiments. Many important experimental results from the
XICS and x-ray imaging diagnostics will be described.

                  
      Contact Person : Prof. Hyeon k. Park (054-279-2096, hyeonpark@postech.ac.kr)  "