Abstract：Hot dense titanium plasma was produced by irradiating a CH foam coated titanium layer with nanosecond laser pulses. The time-integrated emission spectra of He-like titanium were measured by using an absolutely calibrated flat crystal spectrometer. The synthetic spectra obtained by the steady collisional-radiative (CR) equilibrium model associated with the hydrodynamic simulations were compared with the experimental spectra. The results show that the electron density increases up to 5×1021 cm?3 with CH foam of density 40 mg/cc. This work indicates that an overlay of CH foam on a solid target is beneficial to create an optimum condition for K-shell emissions from a high density plasma region.
[1] Davide Salzmann 1998 Atomic Physics in Hot Plasma (New York: Oxford University Press) [2] Eidmann K, Andiel U, Pisani F, Hakel P, Mancini R C, Junkel-Vives G C, Abdallah J and Witte K 2003 J. Quant. Spectrosc. Radiat. Transfer81 133 [3] Xiong G, Zhao Y, Shang W L, Hu Z M, Zhu T, Wei M X, Yang G H, Zhang J Y and Yang J M 2010 Chin. Phys. Lett.27 095202 [4] Boehly T R, Olson R E, Celliers P M, Munro D H, Seka W, Landen O L, Collins G W, Suter L J, Sangster T C and Meyerhofer D D 2010 Phys. Plasmas17 032701 [5] Zhao Y, Yang J M, Zhang J Y, Liu J S, Yuan X and Jin F T 2009 Rev. Sci. Instrum.80 043505 [6] Zhao Y, Shang W L, Xiong G, Jin F T, Hu Z M, Wei M X, Yang G H, Zhang J Y and Yang J M 2010 Chin. Phys. Lett.27 113202 [7] Ramis R, Schmaltz R and Meyer-ter-Vehn J 1988 Comput. Phys. Commun.49 475 [8] Zhao Y, Wei M X, Deng B, Zhu T, Hu Z M, Xiong G, Shang W L, Kuang L Y, Yang G H, Zhang J Y and Yang J M 2011 Chin. Phys. Lett.28 060701 [9] Demir A, Zeitoun P, Tallents G J, Fill E, Jamelot G, Li Y L, Nantel M, Pert G J, Rus B and Schl?gl D 1997 Phys. Rev. E 55 1827 [10] Bitter M, Hill K W, Zarnstorff M, Von Goeler S, Hulse R, Johnson L C, Sauthoff N R, Sesnic S, Young K M, Tavernier M, Bely-Dubau F, Faucher P, Comille M and Dubau J 1985 Phys. Rev. A 32 3011 [11] Zigler A, Jacobs V L, Newman D A, Burkhalter P G, Nagel D J, Luk T S, MacPherson A, Boyer K and Rhodes C K 1992 Phys. Rev. A 45 1569 [12] Jacobs V L and Blaha M 1980 Phys. Rev. A 21 525 [13] Forsman A, Ng A and Xu G 1993 J. Phys. B 26 889 [14] Zhao Y, Deng B, Xiong G, Hu Z M, Wei M X, Zhu T, Shang W L, Li J, Yang G H, Zhang J Y and Yang J M 2011 Chin. Phys. Lett.28 065201
2012, Vol. 29 
