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キーワード:
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要旨:
Growing interest in the development of low energy
projectiles, in particular heavy ions and antiprotons, calls
for new beam instrumentation to be developed to match
the strict requirements on ultra-high vacuum and low
beam perturbation. When it comes to transverse profile
monitoring, a convenient solution for simultaneous
determination of both transverse profiles is found in a
neutral supersonic gas-jet target shaped into a thin curtain
and the two-dimensional imaging of the gas ions created
by impacting projectiles. The resolution and vacuum
efficiency of this monitor is directly linked to the
characteristics of the gas-jet curtain.
In this contribution we describe the design of a nozzleskimmer system to be used for the creation of the jet
curtain in the first prototype of such monitor, together
with the geometry and extraction field shape of the
experimental chamber which will house the experiment.
Using numerical fluid dynamics simulations, we present
the effects resulting directly from changes in the
geometry of the nozzle-skimmer system on the characteristics of the jet curtain.
