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  1. Article

    Open Access

    Swept Langmuir probe investigation of a time varying DC discharge

    The paper reports on the development and application of a swept Langmuir probe to characterize plasma between two disc-like electrodes. A battery was added to a probe circuit to offset against the cathode fall...

    A. Qayyum, M. Usman Naseer, F. Deeba, S. Ahmad, S. I. W. Shah… in SN Applied Sciences (2021)

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  2. No Access

    Article

    Optical Emission and Langmuir Probe Diagnostic Measurements in DC Electrode Pulse Discharge in Nitrogen

    Optical emission of selected nitrogen bands is analyzed for different nitrogen fill pressure and input electrical power to find the changes in spectral intensities with changing discharge conditions. The elect...

    A. Qayyum, F. Deeba, S. Ahmad, Z. Ahmad, M. U. Naseer, S. I. W. Shah… in High Temperature (2019)

  3. No Access

    Article

    Plasma measurements in pulse discharge with resistively heated emissive probe

    A resistively heated emissive probe has been developed to work in low-pressure air plasma produced by 100 Hz pulsed DC source. The evolution of the discharge and consequent rapid changes in plasma potential an...

    A. Qayyum, S. Ahmad, F. Deeba, S. Hussain in High Temperature (2016)

  4. No Access

    Article

    Initial Plasma Formation in the GLAST-II Spherical Tokamak

    This paper reports the initial plasma formation in glass spherical tokamak (GLAST-II) with electron cyclotron resonance pre-ionization assisted startup. Initially, a plasma current of 3 kA has been produced fo...

    S. Hussain, A. Qayyum, Z. Ahmad, S. Ahmad, R. Khan, F. Deeba… in Journal of Fusion Energy (2016)

  5. No Access

    Article

    Triple-probe Diagnostic Measurements in Plasma of GLAST Spherical Tokamak

    Triple-probe has been developed and operated successfully to characterize ECRH-assisted argon as well as hydrogen microwave plasmas in GLAST Spherical Tokamak. This technique enables to determine transient pla...

    A. Qayyum, S. Ahmad, R. Khan, S. Hussain, F. Deeba, M. A. Javed… in Journal of Fusion Energy (2016)

  6. No Access

    Article

    Dust-ion-acoustic double layers in multi-ion dusty plasma

    A theoretical investigation has been made on nonplanar (cylindrical and spherical) dust-ionacoustic (DIA) double layers (DLs) in a multi-ion dusty plasma system containing inertial positive and negative ions a...

    A. A. Mamun, F. Deeba in Plasma Physics Reports (2015)

  7. No Access

    Article

    Physiological effects of arsenate on transplant thalli of the lichen Pyxine cocoes (Sw.) Nyl

    The changes in photosynthetic pigments, chlorophyll fluorescence, protein content, and antioxidant enzymes were investigated in a foliose lichen Pyxine cocoes, which was subjected to increasing concentrations of ...

    Rajesh Bajpai, A. K. Pandey, F. Deeba… in Environmental Science and Pollution Resear… (2012)

  8. No Access

    Article

    Compressive and rarefactive DIA solitons beyond the KdV limit

    The modified Gardner equation (MGE), showing the existence of compressive and rarefactive dust-ion-acoustic (DIA) solitons in a nonplanar dusty plasma (containing inertial ions, Boltzmann electrons, and negati...

    A. A. Mamun, F. Deeba in Plasma Physics Reports (2012)