Laser structured micro-targets generate MeV electron temperature at 4 x10^16 W/cm^2

Angana Mondal; Ratul Sabui; Sheroy Tata; R.M.G.M. Trines; S. V. Rahul; Feiyu Li; Soubhik Sarkar; William Trickey; Rakesh Y. Kumar; Debobrata Rajak; John Pasley; Zhengming Sheng; J. Jha; M. Anand; Ram Gopal; A. P. L. Robinson; M. Krishnamurthy

Laser structured micro-targets generate MeV electron temperature at 4 x10^16 W/cm^2

Angana Mondal, Ratul Sabui, Sheroy Tata, R.M.G.M. Trines, S. V. Rahul, Feiyu Li, Soubhik Sarkar, William Trickey, Rakesh Y. Kumar, Debobrata Rajak, John Pasley, Zhengming Sheng, J. Jha, M. Anand, Ram Gopal, A. P. L. Robinson, M. Krishnamurthy

Physics

Research output: Working paper

Abstract

Relativistic temperature electrons higher than 0.5 MeV are generated typically with laser intensities of about 10^18 W/cm^2. Their generation with high repetition rate lasers that operate at non-relativistic intensities (~10^16W/cm^2) is cardinal for the realization of compact, ultra-short, bench-top electron sources. New strategies, capable of exploiting different aspects of laser-plasma interaction, are necessary for reducing the required intensity. We report here, a novel technique of dynamic target structuring of microdroplets, capable of generating 200 keV and 1 MeV electron temperatures at 1/100th of the intensity required by ponderomotive scaling(10^18 W/cm^2) to generate relativistic electron temperature. Combining the concepts of pre-plasma tailoring, optimized scale length and micro-optics, this method achieves two-plasmon decay boosted electron acceleration with "non-ideal" ultrashort (25 fs) pulses at 4 x10^16 W/cm^2 only. With shot repeatability at kHz, this precise in-situ targetry produces directed, imaging quality beam-like electron emission up to 6 MeV with milli-joule class lasers, that can be transformational for time-resolved, microscopic studies in all fields of science.

Original language	English
Number of pages	21
Publication status	Published - 8 Jul 2021

Publication series

Name	arXiv

Access to Document

2107.03866v1

Cite this

@techreport{e49de6e84f1a412989c74c91c1ce3338,

title = "Laser structured micro-targets generate MeV electron temperature at 4 x10^16 W/cm^2",

abstract = " Relativistic temperature electrons higher than 0.5 MeV are generated typically with laser intensities of about 10^18 W/cm^2. Their generation with high repetition rate lasers that operate at non-relativistic intensities (~10^16W/cm^2) is cardinal for the realization of compact, ultra-short, bench-top electron sources. New strategies, capable of exploiting different aspects of laser-plasma interaction, are necessary for reducing the required intensity. We report here, a novel technique of dynamic target structuring of microdroplets, capable of generating 200 keV and 1 MeV electron temperatures at 1/100th of the intensity required by ponderomotive scaling(10^18 W/cm^2) to generate relativistic electron temperature. Combining the concepts of pre-plasma tailoring, optimized scale length and micro-optics, this method achieves two-plasmon decay boosted electron acceleration with {"}non-ideal{"} ultrashort (25 fs) pulses at 4 x10^16 W/cm^2 only. With shot repeatability at kHz, this precise in-situ targetry produces directed, imaging quality beam-like electron emission up to 6 MeV with milli-joule class lasers, that can be transformational for time-resolved, microscopic studies in all fields of science. ",

author = "Angana Mondal and Ratul Sabui and Sheroy Tata and R.M.G.M. Trines and Rahul, {S. V.} and Feiyu Li and Soubhik Sarkar and William Trickey and Kumar, {Rakesh Y.} and Debobrata Rajak and John Pasley and Zhengming Sheng and J. Jha and M. Anand and Ram Gopal and Robinson, {A. P. L.} and M. Krishnamurthy",

year = "2021",

month = jul,

day = "8",

language = "English",

series = "arXiv",

type = "WorkingPaper",

}

TY - UNPB

T1 - Laser structured micro-targets generate MeV electron temperature at 4 x10^16 W/cm^2

AU - Mondal, Angana

AU - Sabui, Ratul

AU - Tata, Sheroy

AU - Trines, R.M.G.M.

AU - Rahul, S. V.

AU - Li, Feiyu

AU - Sarkar, Soubhik

AU - Trickey, William

AU - Kumar, Rakesh Y.

AU - Rajak, Debobrata

AU - Pasley, John

AU - Sheng, Zhengming

AU - Jha, J.

AU - Anand, M.

AU - Gopal, Ram

AU - Robinson, A. P. L.

AU - Krishnamurthy, M.

PY - 2021/7/8

Y1 - 2021/7/8

N2 - Relativistic temperature electrons higher than 0.5 MeV are generated typically with laser intensities of about 10^18 W/cm^2. Their generation with high repetition rate lasers that operate at non-relativistic intensities (~10^16W/cm^2) is cardinal for the realization of compact, ultra-short, bench-top electron sources. New strategies, capable of exploiting different aspects of laser-plasma interaction, are necessary for reducing the required intensity. We report here, a novel technique of dynamic target structuring of microdroplets, capable of generating 200 keV and 1 MeV electron temperatures at 1/100th of the intensity required by ponderomotive scaling(10^18 W/cm^2) to generate relativistic electron temperature. Combining the concepts of pre-plasma tailoring, optimized scale length and micro-optics, this method achieves two-plasmon decay boosted electron acceleration with "non-ideal" ultrashort (25 fs) pulses at 4 x10^16 W/cm^2 only. With shot repeatability at kHz, this precise in-situ targetry produces directed, imaging quality beam-like electron emission up to 6 MeV with milli-joule class lasers, that can be transformational for time-resolved, microscopic studies in all fields of science.

AB - Relativistic temperature electrons higher than 0.5 MeV are generated typically with laser intensities of about 10^18 W/cm^2. Their generation with high repetition rate lasers that operate at non-relativistic intensities (~10^16W/cm^2) is cardinal for the realization of compact, ultra-short, bench-top electron sources. New strategies, capable of exploiting different aspects of laser-plasma interaction, are necessary for reducing the required intensity. We report here, a novel technique of dynamic target structuring of microdroplets, capable of generating 200 keV and 1 MeV electron temperatures at 1/100th of the intensity required by ponderomotive scaling(10^18 W/cm^2) to generate relativistic electron temperature. Combining the concepts of pre-plasma tailoring, optimized scale length and micro-optics, this method achieves two-plasmon decay boosted electron acceleration with "non-ideal" ultrashort (25 fs) pulses at 4 x10^16 W/cm^2 only. With shot repeatability at kHz, this precise in-situ targetry produces directed, imaging quality beam-like electron emission up to 6 MeV with milli-joule class lasers, that can be transformational for time-resolved, microscopic studies in all fields of science.

M3 - Working paper

T3 - arXiv

BT - Laser structured micro-targets generate MeV electron temperature at 4 x10^16 W/cm^2

ER -