Invited Talks

Invited and Plenary lectures (62)

1. Plenary Lecture, 7th Asia Pacific Conference on Plasma Physics (AAPPSDPP 2023), "Plasma potential fluctuations in cold micro-plasma jets : interactive surface feedback effects on reactive species generation ", 12-17, November, 2023, Nagoya, Japan.  

2. Topical Invited Lecture, XXXV International Conference on Phenomena in Ionized Gases (ICPIG 2023), "Potential fluctuation dynamics in cold atmospheric pressure microplasmas", 9 - 14 July, 2023, Organized by Eindhoven University of Technology, Egmond aan Zee, The Netherlands.

3. Invited Speaker, International Conference on Plasma Science and Applications (ICPSA 2022), "Focusing intense charged particle beams using nonlinear demagnification by plasma sheaths ", 28 - 30 December, 2022, Organized by Gauhati University in association with Asian African Association for Plasma Training (AAAT) (online conference).

4. Invited Speaker, 36th National Symposium on Plasma Science and Technology (PLASMA 2021), "Understanding plasma adaptation for biomedical application : strong magnetic", 13-15 December, 2021, Organized by Birla Institute of Technology, Mesra, Jaipur Campus, India.

5. Invited Speaker, International Conference on Plasma Science and Applications (ICPSA 2021), "Understanding potential fluctuation dynamics and strong magnetic field effects in cold atmospheric pressure plasma jets", 28 - 30 December, 2021, Virtual Conference organized by Nanjing University of Science and Technology, China and AAAPT.

6. Plenary lecture, Virtual International Conference on Physical Sciences (ICPS-2021, jointly organized by the Department of Physics, Department of Chemistry and Department of Applied Mathematics and Humanities, Sardar Vallabhbhai National Institute of Technology Surat, 5th - 6th February 2021.

7. Invited Speaker, International Conference on Plasma Science and Applications (ICPSA 2020), "Plasma sheath induced nonlinear optics in focused ion beams", 26 – 28 December, 2020, Virtual Conference organized by Ravenshaw University, Cuttack, India

8. Invited Lecture, 47th IEEE International Conference on Plasma Sciences (ICOPS 2020), "Focused ion beam optics driven by sheath nonlinearity and wave-plasma interaction in restricted geometry", 6 - 10 December 2020, Singapore (organized as fully Virtual Conference online).

9. Invited Colloquium, Cosmic Ray Group of Astronomy (CRAGA), High Energy Cosmic Ray Research Center, North Bengal University, "Intriguing physics of plasmas confined by a dipole magnet : from colossal planetary magnetospheres to a table top plasma device", November 28, 2020 (held online)

10. Plenary Lecture, 4th Asia Pacific Conference on Plasma Physics, "Intriguing physics of plasmas confined by a dipole magnet driven at steady state", 26-31, October, 2020, Seoul, Korea, (organized as fully Virtual Conference online).  

11. Invited Lecture, 8th PSSI-Plasma Scholars Colloquium, "Confinement, diffusion, and adiabaticity in a tabletop magnetic dipole plasma: unraveling surprises via experiments", October 8-9, 2020, Online Conference organized by KIIT Bhubaneshwar, India  

12. Plenary lecture, 8th Topical conference on Atomic and Molecular Collisions for Plasma Applications, "Physics of Plasmas Confined by a Dipole Magnet", Department of Physics, Indian Institute of Technology - Roorkee, India, 4 March (2020).

13. Invited Colloquium speaker, Department of Physics, Indian Institute of Science, "Ion beam sculpting: wave-plasma cooperation for sustenance in restricted geometry", Indian Institute of Science, Bangalore, India, 27 September (2019).

14. Plenary lecture, "Ion Beams from Plasmas Driven by Electromagnetic Waves : Physics and Applications", 22nd National Conference on Atomic and Molecular Physics (NCAMP-20 19), Indian Institute of Technology-Kanpur, Kanpur, India, 25 - 28, March (2019).

15. Plenary lecture, "Capillary Guiding and Sub-Micron Structuring using Ion Beams from Microwave Plasmas in a Multicusp", International Conference on Photonics, Metamaterials & Plasmonics (PMP 2019), Jaypee Institute of Information Technology, Noida, India, 14 - 16, February (2019).

16. Invited lecture, "Capillary Guiding and Sub-Micron Structuring using Ion Beams from Microwave Plasmas in a Multicusp", 27th International Toki Conference and 13th Asia Pacific Plasma Theory Conference (received invitation as an invited speaker but could not attend), Ceratopia Toki, Toki-city, Gifu, Japan, November 19-22 (2018).

17. Key note lecture, "Ion Beams from Plasmas Driven by Electromagnetic Waves : Physics and Applications", Keynote lecture - 6th PSSI Plasma Scholars Colloquium (received invitation as a key note speaker but could not attend), Sikkim Manipal Institute of Technology, Majitar, Sikkim, 24 - 26, August (2018).

18. Invited lecture, "Pulse Modulated Wave Induced Plasma States And Self Excited Instability", Physics Research Workshop, IIT Kanpur, February 6 - 7 (2016).

19. Invited lecture, "Pulse modulated wave induced plasma states and self excited instability", 30th National Symposium on Plasma Science and Technology (PLASMA 2015), Saha Institute of Nuclear Physics, Kolkata, December 1 - 4 (2015).

20. Invited lecture, "Direct writing using microwave plasma based multi-element focused ion beams : focusing, diagnostics and micro-structuring", Workshop on the use of low energy ion beam (WIB15), Institute of Physics, Bhubaneshwar, November 7 - 9 (2015).

21. Invited lecture, "Wave interaction with plasmas confined in multicusp magnetic fields ", Plasma Scholars Colloquium (PSC 2015) , Jadavpur University, Kolkata, India, August 6 - 7 (2015).

22. Invited lecture, "Negative ion beams from compact microwave plasmas: volume generation, measurement and wave induced phenomena", The 6th Collaborative Forum between Shizuoka University Japan and the National Fusion Science (NIFS), Shizuoka University, Japan, February, 26 (2015).

23. Invited lecture series, lecture 5, "Birth of a wave induced plasma : electron random walk, energy distribution and gaseous breakdown", Shizuoka University, Japan, March, 16 (2015).

24. Invited lecture series, lecture 4, "Pulse modulated microwave plasmas : self excited instability and plasma states", Shizuoka University, Japan, March, 9 (2015).

25. Invited lecture series, lecture 3, "Multi-element focused ion beamlets for localized low energy ion matter interactions", Shizuoka University, Japan, March, 5 (2015).

26. Invited lecture series, lecture 2, "Physics of negative ion containing plasmas : volume generation, measurement and wave induced phenomena", Shizuoka University, Japan, February, 24 (2015).

27. Invited lecture series, lecture 1, "Micron focusing, diagnostics and structuring using multielement ion beams from intense microwave plasmas", Shizuoka University, Japan, February, 17 (2015).

28. Invited Colloquium,"Genesis of focused ion beams for plasma nanotechnology using a bounded microwave plasma source with sub-wavelength inhomogeneities", Shizuoka University, Japan, March, 3 (2015).

29. Invited lecture, "Dispersion and Waves in Bounded Plasmas with Subwavelength Inhomogeneities: Focused Ion Beams for Plasma Nanotechnology", Workshop associated with 8th International Conference on Reactive Plasmas (ICRP) and 31st Symposium on Plasma Processing (SPP), Fukuoka, Japan, February 3 - 7 (2014).

30. Invited lecture, "Nanoscale physics and applications using multi element focused ion beams from intense collimated plasmas ", International conference on recent trends in Applied Physics and Materials Science (RAM2013) (Member of Advisory Committee), Bikaner, Rajasthan, February, 1 – 2 (2013).

31. Invited lecture, "Dispersion and Waves in Bounded Plasmas – Genesis of MEFIB", International conference in complex processes in plasmas and nonlinear dynamical systems (ICCPPNDS-2012), Gandhinagar, Gujarat, India, November, 6 - 9 (2012).

32. Invited lecture, "Coexistence of tunneling and displacement currents in a nano gap driven with ac fields", BITs 2nd Annual World Congress in Nano Science and Technology, Qingdao, China, October 26 - 28 (2012).

33. Invited lecture, "Experimental investigation of space-charge-limited flows in the quantum regime", International Conference on Materials Science and Technology (ICMST 2012), St. Thomas College, Pala, Kerala, India, June 10 - 14 (2012).

34. Invited lecture, "Dispersion and Waves in Bounded Plasmas : Genesis of a Novel Focused Ion Beam System (MEFIB)", Department of Instrumentation Science, Jadavpur University, Kolkata, India, April, 02 (2012).

35. Invited lecture, "Micro and Nano Focused Ion Beams for New Physics and Applications", Orientation Workshop on Radiation Science and Applications, Christ Church College, Kanpur, India, February, 10-11 (2012).

36. Invited lecture, "Nanoscale Physis and Applications Using Multi Element Focused Ion Beams", BIT's 1st Annual World Congress in Nano Science and Technology, Dalian, China, October, 23-26 (2011).

37. Invited lecture, "Multi-element focused ion beams: Concepts to Genesis of a Novel Device", Australian National University, Research School of Physics and Engineering, Canberra, Australia, October, 20 (2010).

38. Buti Foundation Award Lecture, "Ion Beams, Plasma and Mesoscopic Physics: Concepts to Genesis of a Novel Device", Physical Research Laboratory, Ahmedabad, India, November, 11 (2009).

39. Special invited lecture, Waves, Plasmas, Ion Beams and Physics of Mesoscopic Systems", Center of Excellence (COE) Advanced Research Seminar, Research and Education Center of Nano Vision Science, Shizuoka University, Hamamatsu, Japan, December, 8 (2009).

40. Invited lecture, "Electromagnetic Wave assisted plasmas, Ion Beams, and Mesoscopic Physics: concepts to genesis of a Novel Device", National Conference on Atomic, Molecular and Nuclear Physics, MMH College, Ghaziabad, India, November, 5 (2009).

41. Invited lecture, "New Frontiers in Nanoscience and Technology using Microwaves for Generation of Multielement Focused Ion Beams", presented at the one day seminar Horizons of Microwave and Millimeter Wave Engineering and Research (Hommer), Department of Radio Physics and Electronics, University of Calcutta, India, August, 22 (2008).

42. Invited lecture, "Electromagnetic Wave interactions with an anisotropic plasma: Nonlinear phenomena, fluctuations, and stability", DST-PSSI interaction meeting on popularizing plasma science, technology and its applications in Indian Academic organizations, Institute for Plasma Research, Gandhinagar, India, August, 7 - 8 (2008).

43. Special invited lecture, "Plasma based nanoscale science and technology with multielemental focused ion beams", Center of Excellence (COE) Advanced Research Seminar, Research and Education Center of Nano Vision Science, Shizuoka University, Hamamatsu, Japan, December, 19 (2007).

44. Invited lecture, "Subnanosecond electron transport in polarized electromagnetic waves and the quasi steady state interpulse plasma", 22nd National Symposium on Plasma Science and Technology (PLASMA2007), Institute for Plasma Research (IPR) and Plasma Science Society of India (PSSI), December, 6 (2007).

45. Invited lecture, "Microwave plasma sources for focused ion beams", Short Term Course on Plasma - Basics and Industrial Applications, Department of Chemical Engineering, Indian Institute of Technology - Kanpur, November, 3 (2007).

46. Invited lecture, "Multielemental Focused Ion Beams", Power Beams -2007, National Symposium on Ion Beam Technology and Applications, Bhabha Atomic Research Center, BRNS, Department of Atomic Energy, Government of India, Septemer, 20 (2007).

47. Invited research project presentation, "Development of a microwave plasma based negative ion source and study of plasma dynamics through a transverse magnetic filter in the negative ion source", Board of Research in Fusion Sciences, National Fusion Programme, NFP Experts Committee meetings Institute for Plasma Research, Gandhinagar, India, April, 4 (2007).

48. Invited lecture, "Study of physics at nanoscales: a new way of generating multielemental focused ion beams", Theme Meeting on High Current Ion sources (HCIS 06)Variable Energy Cyclotron Center, Department of Atomic Energy, Kolkata, April, 6 (2006).

49. Invited lecture, "Intense microwave plasmas for ion source applications", Plasma Science Society of India-Institute for Plasma Research (PSSI-IPR) workshop on National Fusion Programme: ITER and Beyond, Institute for Plasma Research, Gandhinagar, Novembr, 8 (2006).

50. Invited lecture, "Electromagnetic sources of THz radiation: toward efficient generation and control", Indo-French workshop on free electron lasers and their applications, organized by the Indo-French Centre for the promotion of advanced research (IFCPAR), Goa, India, March, 24 (2006).

51. Invited lecture, "Physics of intense microwave plasma ion sources for Radioactive Ion applications", DAE-BRNS, Indian Particle Accelerator Conference -2005, Variable Energy Cyclotron Center (VECC), Kolkata, March, 1 - 5 (2005).

52. Invited lecture, "Physics of intense electromagnetic wave plasma ion sources for multicharged ions: from high frequency to high power sources", Nuclear Science Center (NSC), New Delhi, March, 28 (2005).

53. Invited Colloquium, "Generation of chaotic radiation in a driven electromagnetic wave amplifier with time delayed feedback: a new approach to communication", Institute of Plasma Research (IPR), Gandhinagar, May, 25 (2005).

54. Invited Colloquium, "Electromagnetic sources of THz radiation: frequency upshift by a plasma", Institute of Plasma Research (IPR), Gandhinagar, May, 24 (2005).

55. Invited lecture, "High density plasma generation using microwaves: new frontiers and applications", Short course in the Basics of Plasma and its Application in Integrated Circuit (IC) Fabrication,Indian Institute of Technology (IIT) Kanpur, October, 31 (2004).

56. Invited lecture, "Physics of High Density Microwave Plasmas at Subcutoff Conditions", Physics Department, Indian Institute of Science, Bangalore, India, August (2003).

57. Invited lecture, "Electromagnetic wave generated High Density Microwave Plasmas: New frontiers and applications", Physics Department, Indian Institute of Technology, Kanpur, India, August (2003).

58. Invited lecture, "Electromagnetic sources of THz radiation", Physics Department, Indian Institute of Technology, Kanpur, India, August (2003).

59. Invited colloquium, "Physics and applications of intense collimated narrow cross sectional plasmas",, Department of Physics, University of North Bengal, Raja Rammohunpur, India, August (2003).

60. Invited lecture, "Investigations of folded waveguide TWT oscillators for THz radiation", Fourth International Vacuum Electronics Conference (IVEC)), Seoul, Korea, May (2003).

61. Invited colloquium, "Physics of High Density Microwave Plasmas Beyond Cutoff Conditions", Physics Department, New Mexico Tech, Socorro, NM, USA, March, 25 (2003).

62. Invited lecture, "Development of a high-power pulsed microwave ion source at RIKEN", Riken Distinguished Postdoctoral Fellows final project presentation, The Institute of Physical and Chemical Research (RIKEN), Saitama, Japan, February (2002).

63. Invited colloquium, "Development of a high power microwave pulsed ion source at RIKEN", Physics Department, University of North Bengal, Raja Rammohunpur, India, August (2001).