HRRL Positron Rotating W Target

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The first version of a positron converter target will be designed to distribute the heat load by rotating the tungsten target.

Calculate for 1 mm and 2 mm thick Tungsten

Look for Tungsten disks to attach to brushless motor and fit into beam pipe

Properties of Tungsten

Melting Point =

Heat Capacity =

Heat loss due to radiation ( \sigma T^4)

Tungsten Temperature as a function of heat load

The Tungsten heats up when an MeV energy electron impinges its surface. The imperfect vacuum inside the beam pipe does allow some radiative cooling.

Conduction and Radiation

IAC beamline pressure =

[1] Positrons