Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"TNSA"”.
-
Radiographic applications and control of TNSA proton beams
The interaction of a high intensity laser pulse with a thin solid target can drive the acceleration of protons and other heavier ions to multi MeV energies. The resulting ion beam has unique properties such as low transverse emittance, short pulse duration, high particle flux, large beam divergence …
-
Proton acceleration experiment by high intensity laser pulse interaction with solid density target at the Texas Petawatt Laser Facility
… A basic proton acceleration mechanism called TNSA will be introduced with supplemental free plasma expansion model. To investigate proton acceleration at the Texas Petawatt Facility, the experimental set up and target alignmen will be introduced in the chapter 5. While the analysis of data …
-
generation and transport of high-current relativistic electron beams in high intensity laser-solid interactions
… diagnosed by means of a 2D Cu Kα imager and the TNSA-generated proton beam. Analytical models together with a 3D hybrid-PIC code are employed to simulate the beam properties in solids. The effects of the self-generated fields on the fast electron beam transport, the effect of the preplasma …
-
Selective Deuteron Acceleration using Target Normal Sheath Acceleration
… by target normal sheath acceleration (TNSA), in which the normally dominant contaminant proton and carbon ion signals are suppressed by orders of magnitude relative to the deuteron signals is reported. Using a laser pulse with 0.5 J, 120 fs duration, and ~5 x 10<sup>18</sup> …
-
Genetic studies on the region downstream of the unc operon of Thiobacillus ferroxidans
… have very good amino acid sequence homology to TnsA of transposon Tn7. Inverted repeats very similar to the imperfect inverted repeat sequences of Tn7 were found upstream of ORF3. The cloned T ferrooxidans glmS gene was successfully used to complement an E.coli glmS mutant CGSC 5392 when placed …
-
Real-time observation of particle interactions in matter using laser-driven accelerators
… and Target Normal Sheath Acceleration (TNSA) respectively, as the pump source and chirped light with an adjustable wavelength as the probe. The role of localised and delocalised particle interactions within ordered and disordered media is examined in various forms of SiO2. By tracking …
-
The role of near time coherent contrast on ultrafast laser driven radiation sources
… via Target normal sheath acceleration (TNSA). Using the optical streaking method, ultrafast absorption dynamics induced by the accelerated protons in H_20 are observed. By changing the arrival of the controlled prepulse the maximum energy of the incident protons, and by extension their …
-
Laser-Driven Particle Acceleration - Improving Performance Through Smart Target Design
… order was found to result in smoother beams of TNSA-produced protons as compared to amorphous structures. In addition it was demonstrated that short pulse (fs) laser-solid interactions produce magnetic fields, the strength of which can reach 10 kT, mimicking astrophysical conditions. In the …
-
Schemes of ion acceleration employing high energy, petawatt laser pulses
… established target normal sheath acceleration (TNSA) regime, namely radiation pressure acceleration (RPA) in the limits of thick (hole boring) and thin (light sail) target regimes.<br/><br/>In the first experiment, a target composed of a solid cryogenic hydrogen ribbon, 75- 100μm in thickness, …