Fluidised tungsten

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This is PASI Targets work package 3.

  • Task: Engineering related to flowing tungsten powder target
  • Coordinator: Chris Densham


First experiment on HiRadMat

Dear Colleagues,

Just a quick note to say that we successfully ran a tungsten powder experiment at HiRadMat, CERN, last Thursday. This was the first experiment to run on Ilias Efthymiopoulos' new facility. If you type HRMT10 into YouTube then you can see the results of what happens if you put a 440 GeV proton beam pulse into a trough of tungsten powder in a helium environment at atmospheric pressure:

YouTube videos of experiment on 2012-May-31

The result looks dramatic, but not as dramatic as what happens if you do the same to mercury. The bright light in the centre is the laser light from a Laser Doppler Vibrometer, which we used to measure the difference between the stress wave generated in the powder container and an outer container (which will only see secondaries but no impact from the powder itself). We need to study the LDV and video data to make some proper conclusions, but initial indications are that the inner wall was not subjected to anything extreme. The project team was Otto Caretta, Tristan Davenne, Mike Fitton, myself, Peter Loveridge, Joe O'Dell from RAL and Nikolaos Charitonidis and Ilias Efthymiopoulos at CERN.

Best regards, Chris