Laser driven electron acceleration in a CNT embedded gas jet target. (15th August 2014)

• Record Type: Journal Article
• Authors: Kumar, Ashok; Dahiya, Deepak; Tripathi, V. K.
• Is Part Of: Laser and particle beams. Volume 32:Number 3(2014)
• Page Start: 495
• Page End: 500
• Publication Date: 2014-08-15
• Subjects: Laser beams -- Periodicals; Particle beams -- Periodicals; 535.5
• DOI: 10.1017/S0263034614000433
• Languages: English
• ISSNs: 0263-0346

Abstract

<abstract abstract-type="normal"> <title>Abstract</title> <p>The bubble regime acceleration of electrons by a short pulse laser in a carbon nanotube (CNT) embedded plasma is investigated, employing two-dimensional Particle-in-Cell simulations. The laser converts the CNT placed on the laser axis into dense plasma and expels the electrons out, to form a co-moving positive charged sheet inside the bubble. The additional field generated due to sheet enhances the energy of the monoenergetic bunch by about 5% and their number by 5–20%. For a typical 40 fs, 7.5 × 10¹⁹ Wcm⁻² pulse in an underdense plasma of density <italic>n</italic>₀, CNT of thickness 25 nm and electron density 30<italic>n</italic>₀, produces a monoenergetic bunch of 115 MeV with 5% energy spread. When CNT density is raised to 90<italic>n</italic>₀, the energy gain, energy spread and accelerated charge increases further. The analytical framework supports these features.</p> </abstract>