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Attosecond ‘Lighthouses’: Simple Method for Generating Isolated Ultrashort Pulses
Posted: 30 November 2012 02:19 PM   [ Ignore ]
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Would this type of imaging be useful in fusion research or is it overkill?

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Posted: 30 November 2012 02:43 PM   [ Ignore ]   [ # 1 ]
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What are you trying to image?  Pinches are bright enough emitters that optical back-lighting is not necessary.  Most back-lighting experiments must be in the x-ray regime (1-10 keV) so you can see through the pinch region and get the mass density. 

Interferometry in the pinch region requires intense UV lasers at the low energy limit like more like soft x-ray lasers at 50-100 eV.  As I recall, LPP is not a fan of interferometry techniques.  Even if the wavelengths are correct, the time is so short/power so high you’d likely damage the detector.  Most cutting edge plasma diagnostics are running with ~10 ps lasers which is more than enough.  Most of us low-rent folks are using ~1 ns lasers for diagnostics before the pinch implodes to measure the plasma density and the local magnetic field. 

Associated components like non-linear optics are interesting for pinch research but they need to be evolved substantially to ensure the measured signals are real representation of the data before the non-linear optics are used.

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