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  • Clever way to make a gamma ray telescope

    From Jan Panteltje@21:1/5 to All on Thu Jan 4 05:39:43 2024
    Pancake stack of films on a balloon most accurate gamma-ray telescope
    https://www.sciencedaily.com/releases/2023/12/231221161951.htm
    clever way to make gamma ray pictures.

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  • From Martin Brown@21:1/5 to Jan Panteltje on Fri Jan 5 17:23:08 2024
    On 04/01/2024 05:39, Jan Panteltje wrote:
    Pancake stack of films on a balloon most accurate gamma-ray telescope
    https://www.sciencedaily.com/releases/2023/12/231221161951.htm
    clever way to make gamma ray pictures.

    That is actually quite clever, ingenious and high resolution.

    I was once involved in another way to get what at the time were cutting
    edge high energy satellite images by rotating a set of scintillation
    counters with a second set in front creating a quadratic residue mask.
    It imaged the sky in 1D at much better than anything prior and the
    spinning allowed a 2D image. The resolution was pretty poxy though.

    Shadow mask tricks were popular back then since nobody had been able to
    focus such energetic radiation well enough. Once they could it was
    quickly outclassed by glancing incidence optics with seriously high
    resolution in the X-ray band.

    --
    Martin Brown

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  • From Jeroen Belleman@21:1/5 to Martin Brown on Fri Jan 5 21:49:39 2024
    On 1/5/24 18:23, Martin Brown wrote:
    On 04/01/2024 05:39, Jan Panteltje wrote:
    Pancake stack of films on a balloon most accurate gamma-ray telescope
      https://www.sciencedaily.com/releases/2023/12/231221161951.htm
    clever way to make gamma ray pictures.

    That is actually quite clever, ingenious and high resolution.

    I was once involved in another way to get what at the time were cutting
    edge high energy satellite images by rotating a set of scintillation
    counters with a second set in front creating a quadratic residue mask.
    It imaged the sky in 1D at much better than anything prior and the
    spinning allowed a 2D image. The resolution was pretty poxy though.

    Shadow mask tricks were popular back then since nobody had been able to
    focus such energetic radiation well enough. Once they could it was
    quickly outclassed by glancing incidence optics with seriously high resolution in the X-ray band.



    To my knowledge, using stacks of film to record particle tracks
    is as old as knowledge of radioactivity itself. However, moving
    a few layers, clockwork fashion, for recording the time of the
    tracks is a cute trick.

    Moreover, they used this to correct for the swaying motion of
    their balloon-borne detector so they could pinpoint the origin
    of the gammas! Now that's worthy of admiration! Hats off!

    Jeroen Belleman

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