Influence of the Inner Diameters of Capillary on the Z‐Pinch Plasma of the Capillary Discharge Soft x‐ray Laser

Abstract

In this paper, the effects of inner diameters on the Z-pinch plasma of capillary discharge soft x-ray laser were investigated with the 3.2 mm and 4.0 mm inner diameter alumina capillaries. The intensities of the laser emitted from the 3.2 mm and 4.0 mm inner diameter alumina capillaries were measured under different initial pressures. To understand the underlying physics of the experimental measurements, the Z-pinch plasma simulations had been conducted with a one-dimensional cylindrical symmetry Lagrangian magneto-hydrodynamics (MHD) code. The parametric studies of Z-pinch plasma, such as the electron temperature, the electron density and the Ne-like Ar ion density, were performed with the MHD code. With the experimental and the simulated results, the discussions had been conducted on the Z-pinch plasma of Ne-like Ar 46.9 nm laser with the 3.2 mm and 4.0 mm inner diameter alumina capillaries. The analysis had been made on the difference of the gain coefficients under the optimum pressures with both capillaries. Then, the effects of inner diameters on the optimum pressure and the pressure domain were analyzed.

Impact of discharge current profile on the lasing efficiency of 46.9 nm capillary discharge soft x-ray laser

“…The system has now been emerged as a very compact table-top coherent x-ray source reliably working at few Hz repetition rate [11][12][13]. Several research groups worldwide have contributed to the progress of this field and the field still continues to grow even two decades after its first experimental demonstration [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. These groups have not only demonstrated the x-ray lasing under different exper imental conditions but also helped in understanding the role of various experimental parameters on the lasing action [20,22,29,30,31].…”