Analysis of preformed plasma condition of Ni-like Mo X-ray laser media

Download
2006
İnce, Sevi
The aim of this work is to produce X-ray laser source from a plasma produced by focusing a pulsed laser beam on a solid target. Preformed Molybdenum plasma is created by using Nd:YAG laser pulses with a pulse duration 6 ns and pulse intensity 5.09x1011 W/cm2. Detailed simulations of Ni-like Mo X-ray laser media are undertaken using the EHYBRID code which is a hydrodynamic code. X-ray resonance lines between 25 Å and 40 Å emitted from the molybdenum plasma have been obtained and analysed. EHYBRID code also gives an information about the electron temperature, electron density, efficient ionization degree and plasma expansion distance of the Ni-like Mo X-ray laser media. An experimental set-up to produce preformed Mo plasma for x-ray laser has been designed for a future work.

Suggestions

Measurement of nonuniform magnetized argon plasma discharge parameters
Dağtekin, Ebru; Bilikmen, Kadri Sinan; Department of Physics (2006)
Effects of a magnetic field on the double-probe technique are studied experimentally by means of symmetric floating computer controlled fast double probes in low and intermediate pressure plasmas. In addition, the effects of the magnetic field on the electron temperature, electron density, and electric field have been investigated. As it is expected, when there is no magnetic field, properties of the discharge plasma are best described by Langmuir theory. Whereas, when there’s a magnetic field of sufficient...
Monitoring durability of new concrete bridge decks
Aktan, Haluk M.; Yaman, İsmail Özgür; Staton, John F. (2001-08-03)
The ND durability monitoring procedure, which measures the soundness of field concrete, is based on the fundamental relationship between ultrasonic pulse velocity (UPV) and permeability of an elastic medium. An experimental study documented adequate sensitivity between UPV and concrete permeability. The durability monitoring procedure is based on a parameter developed as part of this study and called paste quality loss (PQL) which is computed from the probability density function parameters of ultrasonic pu...
Imaging of metal surfaces using confocal laser scanning microscopy
Yıldız, Bilge Can; Altan, Hakan; Department of Physics (2011)
Optical imaging techniques have improved much over the last fifty years since the invention of the laser. With a high brightness source many imaging applications which were once inaccessible to researchers have now become a reality. Among these techniques, the most beneficial one is the use of lasers for both wide-field and confocal imaging systems. The aim of this study was to design a laser imaging system based on the concept of laser scanning confocal microscopy. Specifically the optical system was based...
Modelling of a continuous optical discharge stabilized by a gas flow in quasi-optical approximation
Rafatov, İsmail; Yedierler, Burak (IOP Publishing, 2009-03-07)
We consider a continuous optical discharge (COD) sustained by a weakly focused CO(2) laser beam and stabilized by a cold gas flow incident in the direction of the laser radiation propagation. We develop and examine a two-dimensional radiative gas-dynamic model for COD which uses realistic quasi-optics and takes refraction of the laser radiation in the plasma properly into account in describing the laser beam propagation. The model is applied to calculate the parameters of COD in the air flow as functions of...
Theoretical investigation of laser produced Ni-like Sn plasma
Yurdanur, Elif; Bilikmen, Kadri Sinan; Department of Physics (2006)
In this thesis, theoretical investigation of nickel-like tin plasma is presented. X-ray production in a plasma medium produced by a laser beam is reviewed. Applications mostly, lithography are discussed. Two different schemes for x-ray lasing, namely, quasi-steady state and transient collisional excitation are explained and compared. The computer codes that are used for plasma, especially for laser produced plasma and x-ray laser including hydrodynamic codes, ray-trace codes and collisional radiative codes ...
Citation Formats
S. İnce, “Analysis of preformed plasma condition of Ni-like Mo X-ray laser media,” M.S. - Master of Science, Middle East Technical University, 2006.