LDM Member

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  • LDM

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    Paradigmnoia

    Thank's for putting all this effort into investigationg this in more detail.

    One thing what I see is that for both files with a 150-900 C calibration range the values are about equal.
    Also for both files of the extended calibration…
  • LDM

    Post
    Paradigmnoia


    I can confirm that your above Optris conversions agree closely when I tried it using the .RAVI file suggested.

    Thank's for double checking !

    You may have noted that the emissivity adjustment required to align the Optris-DB2 values to
  • LDM

    Like (Post)
    (Quote from LDM)


    I can confirm that your above Optris conversions agree closely when I tried it using the .RAVI file suggested.
    You may have noted that the emissivity adjustment required to align the Optris-DB2 values to the Lugano numbers is only about…
  • LDM

    Post
    Was the Lugano broadband emissivity iteration done on the Optris ?

    From the text written in the Luagano report it has been concluded that broadband emissivities where used on the Optris and thus the measured temperatures where inflated.
    The Lugano…
  • LDM

    Replied to the thread Rossi-Blog Comment Discussion.
    Post
    (Quote from Shane D.)


    This reminds me of something I investigated a long time ago
    Somewhere it was stated that Rossi visited a small town in Sweden (Don't remember the name of the town anymore and lost the information)
    I wondered what Rossi was doing in…
  • LDM

    Post
    Lugano heater configurations for an inflated dummy run

    For the Lugao dummy run we got the following values for the power of the different sections
    (see post #424)
    The powers for the different sections in case temperatures where inflated where

    Rods
  • LDM

    Like (Post)
    StephenC

    I have taken a look at the SK spectra in the file provided by Pekka Janhunen on ECW. These comprise the 17 spectra shown in closeup just following the 15:18 mark in Rossi video. I am now confident that the majority of the variability you…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from StephenC)


    I stated that it was the upper cutt-off frequency of the intensity versus frequency profile.
    This is the high frequency cutt-off, not the low frequency cut-off.
    And you are rigth that the upper frequency cutoff is determined by…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    Plasma temperature




    For a dense plasma, the temperature of the plasma can be calculated by using the upper cutt-off frequency of the intensity versus frequency profile.
    The relationship is : ν = 2.8E10 x T
    For the temperaure of 8111 degree K which was…
  • LDM

    Post
    Lugano active run period 3 recalculation if temperatures where inflated.

    The attached spreadsheet contains a recalculation of the Lugano active run period 3 if the temperatures where inflated due to using broadband instead of in-band emissivities on…
  • LDM

    Like (Post)
    (Quote from Paradigmnoia)


    To get spectral power, then, doesn't each count have to be multiplied by the energy at it's particular wavelength? It may be that my use of the theoretical blackbody spectrum was incorrect because that is showing radiance and…
  • LDM

    Like (Post)
    (Quote from LDM)


    The vertical scale, Counts, is essentially photon hits. These can be attenuated from a very bright source in many many ways. Or they could come from a very weak source.
    The maximum value for Counts is 65536. A best spectrum would be to…
  • LDM

    Like (Post)
    There are multiple weirdnesses about Rossi's January presentation of the SK, but the weirdest of all involves his treatment of the SK spectrum. Of course lots of people have noted that the spectrum doesn't look very blackbody - ish, but probably many…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from Bruce__H)


    Agreed that the log scales disturbes the picture and that Rossi's spectrum falls off much faster and I have no clue why this is the case.
    However I don't know if the vertical scale of Rossi's spectrum is representative for the…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from Paradigmnoia)


    I did not yet investigate methods used to determine the correct temperature for a dense plasma.
    So as you I am also curious how you can do that.
    This plasma thing is something I am doing on the sidelines since I also still are…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from Bruce__H)


    If the medium is optically thick, radiation generated is only moving a short distance within the medium (relative to its size) before being absorbed again - the
    shape of the spectrum is set by the balance of both emission and…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from seven_of_twenty)


    After the Lugano test, on many forums, including this one, the errors which could have been made where shown in many interesting discussions.
    The Lugano testers in my opion certainly would have gone over these comments and…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from Bruce__H)


    I wouldn't

    As outlined by others and looking at the spectrum, it is not dense for all frequencies.
    And I realy have no idea how much energy is involved in the thin part and the thick part.
    As such I have no idea if we can apply…
  • LDM

    Like (Post)
    (Quote from LDM)


    In a thick plasma by definition the inner radiation is in thermal equilibrium with the ions, which themselves are in thermal equilibrium. There is relatively very little radiation from the outer edge, so the radiative characteristics…
  • LDM

    Replied to the thread Rossi E-Cat SK Demo Discussion.
    Post
    (Quote from Bruce__H)


    OK, Using the theory for plasma radiation , when calculating the power of a thick plasma, this leads to the formula for the thick plasma power of J = σ T4


    This is the same formula as for the power of a black body, but was not…