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Bremsstrahlung soft X-ray emission from clusters heated by a Gaussian laser beam

Published online by Cambridge University Press:  29 October 2013

Manoj Kumar ,
Rohtash Singh  and
Updesh Verma
Manoj Kumar*
Affiliation:
Physics Department, Indian Institute of Technology Delhi, New Delhi, India
Rohtash Singh
Affiliation:
Physics Department, Indian Institute of Technology Delhi, New Delhi, India
Updesh Verma
Affiliation:
Physics Department, Govt. Degree College Bilaspur, Rampur, Uttar Pradesh, India
*
Address correspondence and reprint requests to: Manoj Kumar, Physics Department, Indian Institute of Technology Delhi, New Delhi-110016, India. E-mail: [email protected]
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Abstract

A theoretical model of soft X-ray emission from laser irradiated clusters is developed. An intense short pulse laser of Gaussian radial and temporal profiles impinged on a clustered gas jet, heats the cluster electrons, leading to Bremsstrahlung emission of X-rays. As the clusters expand under hydrodynamic pressure, plasma frequency of the cluster electrons ωpe decreases. When plasma frequency of a cluster approaches plasma resonance ${\rm \omega}_{\,pe} = \sqrt{3} {\rm \omega}$ (where ω is the laser frequency), the electrons are resonantly heated by the laser and a rapid rise in X-ray emission occurs. After a while, when cluster expansion detunes the plasma resonance, X-ray emission falls off.

Keywords

Atomic clusterBremsstralungLaserX-ray emission
Type
Research Article
Information
Laser and Particle Beams , Volume 32 , Issue 1 , March 2014 , pp. 9 - 14
Copyright
Copyright © Cambridge University Press 2013 

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References

REFERENCES

Deiss, C., Rohringer, N. & Burgdorfer, J. (2006). Laser-cluster interaction: X-ray production by short laser pulses. Phys. Rev. Lett. 96, 013203–4.CrossRefGoogle ScholarPubMed
Ditmire, T., Donnelly, T., Falcone, R.W. & Perry, M.D. (1995). Strong X-ray emission from high-temperature plasmas produced by intense irradiation of clusters. Phys. Rev. Lett. 75, 3122–3125.Google Scholar
Ditmire, T., Donnelly, T., Rubenchik, A., Falcone, R. & Perry, M. (1996). Interaction of intense laser pulses with atomic clusters. Phys. Rev. A. 53, 3379–3402.Google Scholar
Ditmire, T., Smith, R.A., Tisch, J.W.G. & Hutchinision, M.H.R. (1997). High Intensity Laser Absorption by Gases of Atomic Clusters. Phys. Rev. Lett. 78, 3121–3124.Google Scholar
Ditmire, T., Springate, E., Tisch, J., Shao, Y., Mason, M., Hay, N., Marangos, J. & Hutchinson, M. (1998). Explosion of atomic clusters heated by high-intensity femtosecond laser pulses. Phys. Rev. A. 52, 369–382.CrossRefGoogle Scholar
Ditmire, T., Zweiback, J., Yanovsky, V.P., Cowan, T.E., Hays, G. & Wharton, K.B. (1999). Nuclear fusion from explosions of femtosecond laser-heated deuterium clusters. Nat. 398, 489–492.CrossRefGoogle Scholar
Dorchies, F., Blasco, F., Bonté, C., Caillaud, T., Fourment, C. & Peyrusse, O. (2008). Observation of subpicosecond X-ray emission from laser-cluster interaction. Phys. Rev. Lett. 100, 205002–4.Google Scholar
Fukuda, Y., Akahane, Y., Aoyama, M., Inoue, N., Ueda, H., Kishimoto, Y., Yamakawa, K., Faenov, A.Ya., Magunov, A.I., Pikuz, T.A., Skobelev, I.Yu., Abdallah, J. Jr., Csanak, G., Boldarev, A.S., & Gasilov, V.A. (2004). Generation of X rays and energetic ions from superintense laser irradiation of micron-sized Ar clusters. Laser Part. Beams 22, 215–220.Google Scholar
Hagena, O.F. & Obert, W. (1972). Cluster formation in expanding supersonic jets: Effect of pressure, temperature, nozzle size, and test gas. J. Chem. Phys. 56, 1793–1802.Google Scholar
Hegelich, B.M., Albright, B.J.Cobble, J., Flippo, K., Letzring, S., Paffett, M., Ruhl, H., Schreiber, J., Schulze, R.K. & Fernandez, J.C. (2006). Laser acceleration of quasi-monoenergetic MeV ion beams. Nature 439, 441–444.CrossRefGoogle ScholarPubMed
Huillier, A.L. & Balcou, Ph. (1993). High-order harmonic generation in rare gases with a 1-ps 1053-nm laser. Phys. Rev. Lett. 70, 774–777.Google Scholar
Issac, R., Wirthig, J., Brunetti, E., Vieux, G., Ersfeld, B., Jamison, S.P., Jones, D., Bingham, R., Clark, D. & Jaroszynski, D.A. (2003). Bright source of K α and continuum X rays by heating Kr clusters using a femtosecond laser. Laser Part. Beams 21, 535–540.CrossRefGoogle Scholar
Jackson, J.D. (1962). Classical Electrodynamics. New York: John Wiley & Sons.Google Scholar
Jha, J., Mathur, D. & Krishnamurthy, M. (2008). Enhancement of X-ray yields from heteronuclear cluster plasmas irradiated by intense laser light. J. Phys. B: At. Mol. Opt. Phys. 38, L291–L299.CrossRefGoogle Scholar
Kanapathipillai, M. (2004). Nonlinear absorption of ultra short laser pulses by clusters. Laser Part. Beams 24, 9–14.CrossRefGoogle Scholar
Krainov, V.P. & Smirnov, M.B. (2002). Cluster beams in the super-intense femtosecond laser pulse. Phys. Rep. 370, 237–331.CrossRefGoogle Scholar
Kumar, M. & Tripathi, V.K. (2009). Rayleigh scattering of a Gaussian laser beam from expanding clusters. Phys. Plasma. 16, 123111–6.CrossRefGoogle Scholar
Kumar, M. & Tripathi, V.K. (2013). Nonlinear absorption and harmonic generation of laser in a gas with anharmonic clusters Phys. Plasma 20, 023302.Google Scholar
Kumarappan, V., Krishnamurthy, M., Mathur, D. & Tribedi, L.C. (2001). Effect of laser polarization on X-ray emission from Arn (n = 200 − 104) clusters in intense laser fields. Phys. Rev. A 63, 023203–6.Google Scholar
Landau, L.D. & Lifshitz, E.M. (1975). The Classical Theory of Fields. New York: Elsevier Science.Google Scholar
Liu, C.S. & Tripathi, V.K. (1994). Interaction of Electromagnetic Waves with Electron Beams and Plasmas. Singapore: World Scientific.Google Scholar
Liu, Y., Dong, Q., Peng, X., Jin, Z. & Zhang, J. (2009). Soft X-ray emission, angular distribution of hot electrons, and absorption studies of argon clusters in intense laser pulses. Phys. Plasmas 16, 043301–5.CrossRefGoogle Scholar
Milchberg, H.M., Mcnaught, S.J. & Parra, E. (2001). Plasma hydrodynamics of the intense laser-cluster interaction. Phys. Rev. E. 64, 056402–7.Google Scholar
Mishra, G., Holkundkar, A.R. & Gupta, N.K. (2011). Effect of laser pulse time profile on its absorption by argon clusters. Laser Part. Beams 29, 305–313.CrossRefGoogle Scholar
Mocek, T., Kim, C.M., Shin, H.J., Lee, D.G., Cha, Y.H., Hong, K.H. & Nam, C.H. (2002). Investigation of soft X-ray emission from Ar clusters heated by ultrashort laser pulses. Laser Part. Beams 20, 51–57.CrossRefGoogle Scholar
Mulser, P., Kanapathipillai, M. & Hoffmann, D.H.H. (2005). Two very efficient nonlinear laser absorption mechanism in clusters. Phys Rev. Lett. 95, 103401.Google Scholar
Para, E., Alexeev, I., Fan, J., Kim, K.Y., Mcnaught, S.J. & Milchberg, H.M. (2000). X-ray and extreme ultraviolet emission induced by variable pulse-width irradiation of Ar and Kr clusters and droplets. Phys. Rev. E. 62, R5931–R5934.CrossRefGoogle Scholar
Sailja, S., Khan, R.A., Naik, P.A. & Gupta, P.D. (2005). Efficient absorption and intense soft X-ray emission from gas cluster plasmas irradiated by 25-ps laser pulses. IEEE Trans. Plasma Sic. 33, 1006–1012.CrossRefGoogle Scholar
Shao, Y.L., Ditmire, T., Tisch, J.W.G., Springate, E., Marangos, J.P. & Hutchinson, M.H.R. (1996). Multi-keV electron generation in the interaction of intense laser pulses with Xe Clusters. Phys. Rev. Lett. 77, 3343–3346.Google Scholar
Shim, B., Hays, G., Zgadzaj, R., Ditmire, T. & Downer, M.C. (2007). Enhanced harmonic generation from expanding clusters. Phys. Rev. Lett. 98, 123902–4.Google Scholar
Shokri, B., Niknam, A.R. & Krainov, V. (2004). Cluster structure effects on the interaction of an ultrashort intense laser field with large clusters. Laser Part. Beams 22, 13–18.CrossRefGoogle Scholar
Smirnov, M.B. & Becker, W. (2006). X-ray generation in laser-heated cluster beams. Phys. Rev. A 74, 013201–17.Google Scholar
Tiwari, P.K. & Tripathi, V.K. (2006). Laser third-harmonic generation in clustered plasmas. Phys. Scr. 74, 682–685.Google Scholar