35 citations · 113 across the 8 of their papers we have counts for
8 papers
Predicting space-charge affected field emission current from curved tips
Debabrata Biswas, Raghwendra Kumar, Gaurav Singh
Field emission studies incorporating the effect of space charge reveal that for planar emitters, the steady-state field , after initial transients, settles down to a value low…
Approximate universality in the electric field variation on a field-emitter tip in the presence of space charge
Raghwendra Kumar, Gaurav Singh, Debabrata Biswas
The electric field at the surface of a curved emitter is necessary to calculate the field emission current. For smooth parabolic emitting tips where space charge is negligible, var…
Simulating multiscale gated field emitters -- a hybrid approach
Shreya Sarkar, Raghwendra Kumar, Gaurav Singh +1
Multi-stage cathodes are promising candidates for field emission due to the multiplicative effect in local field predicted by the Schottky conjecture and its recent corrected count…
Enhanced space charge limited current for curved electron emitters
Gaurav Singh, Raghwendra Kumar, Debabrata Biswas
The maximum current that can be transported across a vacuum diode is limited by forces arising due to space charge. In a planar diode configuration, the space charge limited (SCL)…
The cosine law of field enhancement factor variation: generic emitter shapes
Debabrata Biswas, Gaurav Singh, Rajasree Ramachandran
The cosine law of field enhancement factor variation was recently derived for a hemi-ellipsoidal emitter and numerically established for other smooth emitter shapes (Biswas et al,…
The tunneling potential for field emission from nanotips
Debabrata Biswas, Rajasree Ramachandran, Gaurav Singh
In the quasi-planar approximation of field emission, the potential energy due to an external electrostatic field is expressed as where is the perpendicular…
Variation of field enhancement factor near the emitter tip
Debabrata Biswas, Gaurav Singh, Shreya G. Sarkar +1
The field enhancement factor at the emitter tip and its variation in a close neighbourhood determines the emitter current in a Fowler-Nordheim like formulation. For an axially symm…
Excitation of Coherent States: Wave Function Development and Analysis
Gaurav Singh, Anshul Choudhary, T. R. Seshadri
Agarwal and Tara, in 1991 introduced a new class of states defined as m times application of creation operator to Coherent States known as Excited Coherent States (ECS) or Photon A…