Final Year Projects (FYPs) - Undergraduates
Permanent URI for this collectionhttps://repository.cuilahore.edu.pk/handle/123456789/61
This collection archives the complete set of theses produced by students of the COMSATS University Islamabad, Lahore Campus.
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Item Study of Landau quantization effect over Jeans- Alfven Instability in Dense Plasmas(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2019) ZAHRA SHAHID; CIIT/SP17-RPH-004/LHR; Dr. Muhammad Jamil; LHR TP 5708Quantum plasmas have gained significance due to its applications in magnetized/un- magnetized semiconductor and astrophysical plasmas. Quantum effects are usually incorporated through exchange and correlation potential, Bohm potential, Fermi degenerate pressure in the presence or absence of external magnetic field. The electromagnetic waves of low frequency are commonly known as Alfven waves. The modification in the electronic properties of materials as a function of the applied magnetic field are Landau quantization. Henceforth in this thesis studied the Landau Quantization effect over Jeans Instability in Dense Plasma. The self-gravitational or Jeans instability come to play due to the gravitational characteristics of massive species in plasmas. This thesis deals with two scales competing with each other. First, the gravitational time scale associated with massive particles called ion. Second, acoustic time scale. The source of acoustic scale is the lighter particles like electron fluid that exert acoustic pressure outward. If the two scales are comparable then the system will be at equilibrium. On other case, if the acoustic time scale is larger, then the gravitational collapse will take case and if the gravitational time scale is larger than the explosion will take place. In this work the comparative analysis of Jeans and quantum plasmas have analyzed under different conditions. In other words, the macroscopic effects evolvedItem Sheared Waveguide Analysis in Quantum Plasmas(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2019) Muhammad Ilyas Amin; CIIT/FA17-RPH-053/LHR; Prof. Dr. Muhammad Asif; LHR TP 5732From literature it is found that the confined plasmas particularly in cylindrical geometry is employed for the study of electrostatic waves propagating along the z-direction. However, the study of a wave in a guided channel propagating at oblique angle is still matter of interest. In this thesis we studied the electrostatic wave with sheared features in the presence of electron quantum effects like Fermi pressure, quantum tunneling and the exchange-correlation potential. The high frequency electrostatic waves have been investigated in electron plasma. These electron high frequency waves are propagating obliquely in the cylindrically bounded magnetized electron plasma. The effects of cylindrical coordinates, magnetic field and obliqueness have significant impact on these electron cyclotron frequencies. The Bessel function of zero and first order effects are observed closely. Quantum parameters are used to check the phase effect on electron cyclotron wave. These results can be helpful for understanding the laboratory plasma.