Data science
"If a drop of water falls in a lake there is no identity. But if it falls on a leaf of lotus it shines like a pearl. So choose the best place where you would shine.."
Friday, July 29, 2016
Wednesday, September 24, 2014
Monte Carlo Simulations of focused electron and ion beam induced processing
Monte Carlo simulations of focused ion beam induced processing
R. Timilsina
Although several efforts are being devoted to understand the
ion/electron-solid interactions and focused ion beam induced processing in the
past several decades, the recent development of Gas Field Ion Source (GFIS) has
garnered much attention in these days because of its wide range of applications
in nanoscale synthesis, nanoscale imaging, lithography and nanofabrication. Timilsina
et al have developed a simulator, called “EnvisION”, which has features of
simulating elemental and compound targets by using both light and heavy ions
with various beam profiles. The simulator can simulate electron/ion beams at
different energies and provides the three dimensional nanostructures of
deposited pillars, etched via and sputtered vias. In addition, the simulator
calculates the nuclear and electronic energy loss profile, ion implant concentrations,
resolution limiting effects etc. The peer-reviewed articles based on the
EnvisION simulator and related to the simulator are listed below.
References
[1] R. Timilsina, D. A. Smith and P. D. Rack, “A comparison
of neon versus helium ion beam induced deposition via Monte Carlo simulations”,
Nanotechnology 24, 115302 (2013)
[2] R. Timilsina and P. D. Rack, “Monte Carlo Simulations of
nanoscale focused neon ion beam sputtering”, Nanotechnology 24, 495303 (2013)
[3] R. Timilsina, S. Tan, R. Livengood and P. D. Rack,
“Monte Carlo simulations of nanoscale focused neon ion beam sputtering of
copper: elucidating resolution limits and sub-surface damage”, Nanotechnology
25, 485704 (2014)
[4] C. Gonzalez, R. Timilsina, G. Li, G. Duscher, P. D.
Rack, W. Slingenbergh, W. F. van Dorp, J. T. M. De Hosson, K. L. Klein, H. M.
Wu and L. A. Stern “Focused helium and neon ion beam induced etching for
advanced extreme ultraviolet lithography mask repair”, J. Vac. Sci. Technol. B
32, 021602 (2014)
[5] H. M. Wu, L. A. Stern, J. H. Chen, M. Huth, C. H.
Schwalb, M. Winhold, F. Porrati, C. M. Gonzalez, R. Timilsina and P. D. Rack, “Synthesis
of nanowires via helium and neon focused ion beam induced deposition with the
gas field ion microscope”, Nanotechnology 24, 175302 (2013)
[6] G. Arnold, R. Timilsina, J. Fowlkes, A. Orthacker, G.
Kothleitner, P. D. Rack and H. Plank, “Fundamental Resolution Limits During
Electron-Induced Direct-Write Synthesis”, ACS Applied material &
interfaces, 6, 7380 (2014)
[7] J. H. Noh, J. D. Fowlkes, R. Timilsina, M. G. Stanford,
B. B. Lewis and P. D. Rack, “Pulse Laser-Assisted focused electron-beam-induced
etching of titanium with XeF2: Enhanced reaction rate and precursor transport”,
ACS applied material & interfaces, 7, 4179 (2015)
[8] H. Guo, S. Dong, P. D. Rack, J. D. Budai, C. Beekman, Z.
Gai, W. Siemons, C. M. Gonzalez, R. Timilsina, A. T. Wong, A. Herklotz, P. C.
Snijders, E. Dagotto and T. Z. Ward, “Strain Doping: Reversible Single-Axis
Control of a Complex Oxide Lattice via Helium Implantation”
[9] C. M. Gonzalez, W. Slingenbergh, R. Timilsina, J. H.
Noh, M. G. Standford, B. B. Lewis, K. K. Klein, T. Liang, J. D. Fowlkes and P.
D. Rack, “Evaluation of mask repair strategies via focused electron, helium,
and neon beam induced processing for EUV applications ”, SPIE Proceeding,
Extreme Ultraviolet (EUV) Lithography, 9048, 90480M (2014)
Sunday, July 29, 2012
Sunday, January 29, 2012
Fascinating career for physicist "Quant"
I want to share you something that is very useful for the physicist who has strong background or willing to learn computer programming.
1. You learn basics of C++, Java and C# (c sharp)
2. Numerical methods such as ODE, PDE, Monte Carlo Simulation
3. Data analysis skills
4. Parallel programming such as OpenMPI
I will provide basic tutorials on each topic so that I would be helpful to you.
1. You learn basics of C++, Java and C# (c sharp)
2. Numerical methods such as ODE, PDE, Monte Carlo Simulation
3. Data analysis skills
4. Parallel programming such as OpenMPI
I will provide basic tutorials on each topic so that I would be helpful to you.
Thursday, August 25, 2011
Wednesday, August 24, 2011
Every one should know, the advantage and disadvantage of a technology simultenously
Just watch it, It is informative.
Thursday, July 7, 2011
Who is smart? A professor or students
That was on Tuesday, three friends decided to attend a wedding party of their friend, however, they have a test on the next day. They went to the party and stayed over there the whole night. They have the test on the morning at 11 am. They were not prepared enough, so they made a plan. They will tell the professor that they went to a wedding party just for two hours but a tire of their car got flat in the middle of a way going back to their home. It was in the midnight so that they couldn't find anyone nearby them and they pushed the car unless they could reach their home. They put some mud and oil on the cloths and went to the professor. They told according to the plan and requested him to postpone the test for the next day. The professor told them that why only one day, he will give them 3 more days and the test will be on Friday morning. They were so happy and went to the home and did good preparation for the test.
On Friday, the professor told them to be in three different rooms. The professor asked them only two questions which are given below.
1) Write your name (5 Marks)
2) Which tire got flat? (95 Marks)
Now it's your turn, who is smart?
Students or the professor?
On Friday, the professor told them to be in three different rooms. The professor asked them only two questions which are given below.
1) Write your name (5 Marks)
2) Which tire got flat? (95 Marks)
Now it's your turn, who is smart?
Students or the professor?
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