Changes between Version 18 and Version 19 of InstallingCorsika


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Timestamp:
Oct 20, 2018, 1:31:18 PM (3 months ago)
Author:
tbretz
Comment:

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  • InstallingCorsika

    v18 v19  
    116116> j)  Starting with version 1.25, the package has been prepared for importance sampling ofcore position offsets.  This would mean that actual core offsets can be generated in anon-uniform distribution and can extend to different distances, depending on primaryenergy, primary type, zenith angle and so on. This package, however, does not provide areal implementation of importance sampling (other than for testing that the later stagesof the processing properly get the weights for each event).  If you do nothing about it,you will get uniformly distributed core offsets as before.  If you plan to make use ofimportance sampling, you have to replace the file ’sampling.c’ with an implementationof your choice.
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     118
    118119A problem with the IACT option might be this:
    119120> m)  Starting with version 1.38, the dynamic range in a telescope is basically unlimited dueto automatic thinning of bunches. When a detector sphere is hit by more than the givenmaximum number of bunches, the actual number of bunches is reduced by increasingpowers of two, by discarding every second bunch and increasing the bunch size of theremaining bunches by factors of two.  Very large eventio buffers are now possible on64-bit machines. They were formerly limited to less than 1 GiB per telescope array andevent and now to 2 GiB on 32-bit machines but can be increased to 4 Terabytes on 64-bitmachines.
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     122
     123The secret of wavelength 999 and 9999 in eventio:
     124> **IACTEXT** The interface to theTELOUTfunction is extended by parameters describing theemitting particle.   This extended information is stored as an additional photon bunch(after the normal one) with mass, charge, energy, and emission time replacing thecx,cy,photons, andzemfields, respectively, and are identified by a wavelength of 9999.The compact output format is disabled for making that possible. In addition, all particlesarriving at the CORSIKA observation level are included in the eventio format output file,in a photon-bunch like block identified by array and detector numbers 999.
    120125
    121126== Conclusion ==