Abstract
We demonstrate that carbon nanotube coated surfaces produce two orders of magnitude brighter hard x-ray emission, in laser produced plasmas, than planar surfaces. It is accompanied by three orders of magnitude reduction in ion debris which is also low Z and nontoxic. The increased emission is a direct consequence of the enhancement in local fields and is via the simple and well known lightning rod effect. We propose that this carbon nanotube hard x-ray source is a simple, inexpensive, and high repetition rate hard x-ray point source for a variety of applications in imaging, lithography, microscopy, and material processing.
Highlights
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Major efforts are being expended on tailoring plasma x-ray sources produced by ultrashort laser pulses
Summary
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The behavior is well explained by simple electrostatic theory13 and obeys Fowler–Nordheim behavior14 under dc and pulsed excitations.15 Earlier work16 has shown increased soft x-ray emission from laser plasmas created on carbon nanotube coated targets.
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