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Bacterial cells enhance laser driven ion acceleration.

Malay Dalui¹, M Kundu², T Madhu Trivikram¹

¹Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Colaba, Mumbai 400 005, India.

Scientific Reports

|August 9, 2014

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This study introduces a novel bacteria-coated target for intense laser-plasma interactions, significantly boosting carbon ion acceleration to 700 keV. This breakthrough enhances ion acceleration efficiency for advanced applications.

Area of Science:

Intense laser-plasma physics
High-energy particle acceleration

Background:

Intense lasers interacting with plasmas produce hot electrons, driving ion acceleration.
Improving ion acceleration efficiency with existing laser parameters remains a key challenge.

Purpose of the Study:

To present an unconventional target design for enhanced ion acceleration.
To demonstrate a simple method for generating significantly faster ions using intense lasers.

Main Methods:

Utilizing micron-sized bacteria coated on a polished target surface.
Conducting experiments with intense laser parameters.
Performing particle-in-cell simulations to validate experimental findings.

Main Results:

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Achieved 700 keV carbon ion acceleration, a substantial increase from conventional targets (max 40 keV).

Demonstrated that bacteria coating enhances laser energy coupling and plasma temperature.

Particle-in-cell simulations confirmed the effectiveness of micro-particle coated targets for ion acceleration.

Conclusions:

A simple bacteria-coated target dramatically enhances laser-driven ion acceleration.
The enhanced energy coupling and hotter plasma are key to improved ion generation.
Accelerated high-energy carbon ions offer potential for diverse applications.