Electrical Engineering

KHOKAN CHANDRA PAUL

***** **** ****** ****, *** 3 ***********@*****.***

Cupertino, CA 95014 408-***-****

CAREER SUMMARY

Investigating/developing ultra-high efficient metal halide discharge lamps, operated by

microwave power supply. Preparing release packages, BOMs, SOPs.

Was into groundbreaking development activities of discharge-based extreme ultraviolet (EUV)

radiation source that had been realized necessary for next generation lithography (NGL).

Investigated for the development of laser driven light sources, using CW and/or pulse laser.

Developed high-quality and efficient radiation sources for lithographic applications,

semiconductor processing, special lighting and projector utilization.

Developed/applied magnetohydrodynamics (MHD) and computational fluid dynamics (CFD)

models either in vendor-supplied platform or in own architecture for light/radiation/plasma

sources investigations.

Did collaborative study for developing optimized pulse power source that would supply high

current (~50kA) over a short instant (~100 ns). Such a source was realized to give better

performance in producing EUV radiation and may find importance in biomedical applications.

Tried, in shallow depth, electrical circuit simulation using ATP (Alternative Transients Program),

Pspices and Psim (load-flow analysis using Matlab).

Studied means and possibilities for reducing hazardous SF6 gas in power circuit breakers and

gas insulated switchgears

Studied different gaseous plasmas for applications in power systems as well as into materials

processing

Experiences of using packages: Ansys FLUENT, COMSOL, CFX (for CFD, MHD and th ermal

analyses); ASAP (ray-tracing for optical design); Z*BME (for Z-pinch plasma simulations for

EUV sources); JMP for statistical analysis; AutoCAD and Gambit for drawing and meshing.

SCHOLARSHIPS AND AWARDS

From 1984-85 to 1986-87 academic year

University Scholarship in Bachelor program

Was in the Department of Electrical & Electronic Engineering, Chittagong University of Engineering

& Technology (then Bangladesh Institute of Technology, Chittagong).

1992.01 – 1998.03

Japanese Government Scholarship (Monbugakusho) in Graduate program

Was in the Department of Electrical & Computer Engineering, Kanazawa University, Japan.

1995

Gold Medal from IEEJ (Institute of Electrical Engineers, Japan)

For presenting a technical paper, the contents of which were considered outstanding by the IEEJ

committee.

1998

Gold Medal from CUET

For securing the topmost position (First Class First) in the final examination of the Electrical &

Electronic Engineering Department and the highest percentage marks among Bachelor Degree

recipients from all departments.

Khokan C. Paul 1/4

PROFESSIONAL ACTIVITY/MEMBERSHIP

Serving as a reviewer for some journals published by IEEE, AIP, IOP.

Active member of IEEE since 1999

Was member of IEEJ (Institute of Electrical Engineers of Japan) between 1994 and 1999.

EDUCATION

March 1998.

Ph.D. (Major: Electrical Engineering) Kanazawa University, Japan

Dissertation title: “Fundamental Plasma Studies for Different Gases in the Phase of Circuit Breaker

Applications”.

Major courses studied: Advanced Electric Machinery & Electronics for Energy Conversion, Electric

Power Delivery, Advanced Electric Energy Conversion, Heat Plasma Engineering.

March 1995.

M.Eng. (Major: Electrical & Computer Engineering) Kanazawa University, Japan

Thesis title: “Study on High Pressure SF6 Gas Arcs Contaminated by Electrode and Nozzle Vapours”.

Major courses studied: Advanced High Current Engineering, Advanced Power Transmission,

Advanced Thin Film Semiconductors, Advanced Electric Computer Engineering, Advanced Electrical

Energy Conversion Engineering, Advanced Theory of Multidimensional Information Processing

Engineering.

February 1990.

B.Sc.Eng. (Major: Electrical & Electronic Engineering)

Chittagong University of Engineering & Technology, Bangladesh

Thesis title: “Computer Aided Load Flow Study”.

Major courses studied: Electrical Circuits, Electrical Machines, Electronic Circuits, Electromagnetic

Fields, Electrical Measurement & Measuring Instruments, Transmission & Distribution of Electrical

Power, Power System, Power Station, Switchgear & Protection, Communication Engineering,

Servomechanism & control System, Industrial Electronics, Science of Materials, Engineering

Mathematics, Physics, Chemistry.

WORK EXPERIENCES

2011.01 – present

Position: Senior Scientist, R&D Division, Topanga Technologies, Inc., USA.

Responsibilities:

Design and build electrodeless (prototype) lamps, filled with metal halides and operated by

microwave power supply,

Measure photometrics, analyze lamps and enhance speed of product developing-cycle,

Develop simplified thermal models for design applications of reliable and efficient products,

Verify the developed models comparing with experimental results,

Statistical analysis of the results using package like JMP and/or QI Macros

Mentor technical people (technicians),

Collaborate and supply information to product developing engineers for high-quality mass

productions,

Write technical documents,

Prepare product reléase documents, BOMs, SOPs.

Khokan C. Paul 2/4

2001.10 – 2010.12

Position: Chief Engineer until March 2010 and then renamed as Senior Engineer, R&D Center,

Ushio Inc., Japan.

Responsibilities:

Built simulation group for reducing the product developing-cycle of UV and EUV radiation

sources,

Developed calculating models for design applications of reliable and efficient products,

Verified the developed models through experimental measurements,

Mentored technical people (engineers) for understanding the developed calculating schemes

and for using them properly,

Collaborated and supplied information to developing engineers for high-quality mass

productions,

Wrote technical documents.

2000.04 – 2001.09

Position: Postdoctoral Fellow, Electrical & Computer Engineering Department, University of Toronto,

Canada.

Responsibilities:

Developed calculating codes for modeling magnetohydrodynamics (MHD) of direct-current-

operated plasma discharges,

Developed calculation scheme to predict thermal and radiation fields inside solids like

electrode and glass,

Maintained liaison with research groups from Canada, France, Portugal and Japan,

Wrote technical documents on the designed project.

1998.04 – 2000.03

Position: JSPS (Japan Society for the Promotion of Science) Postdoctoral Fellow, Electrical &

Computer Engineering Department, Kanazawa University, Japan.

Responsibilities:

Developed calculating codes for modeling gas circuit breaker and radio-frequency inductively

coupled plasmas, operated in different discharge media,

Carried out spectroscopic measurements and compare results with theoretical findings,

Disseminated findings for developing environmental-friendly gas circuit breakers and for better

materials processing,

Mentored undergraduate and graduate students.

1990.03 – 1991.11

Position: Assistant Engineer, Eusuf Associates, Dhaka, Bangladesh.

Responsibilities:

Installed, commissioned and repaired transmission lines to residential users,

Supervised technicians for rapid installation and repair of lines,

Estimated and analyzed project cost,

Coordinated monthly review meetings and gave feedback to management.

COMPUTER LITERACY

Operating system: Windows XP/NT/7, X-Windows, Unix, Linux

Programming: C/C++, Matlab, Visual Basic, Fortran

Data processing: FieldView, Tecplot, Kaleidagraph, Origin

Circuit simulation: PSpices, ATP, Psim

General package: Word, Excel, PowerPoint, OpenOffice

Statistical analysis package: JMP, QI Macros

Modeling package: ANSYS, Fluent, CFX, ASAP, Z*BME, Pegasus, COMSOL

Khokan C. Paul 3/4

LANGUAGE SKILL

English: Fluent in reading, writing and conversation

Japanese: Fluent in conversation; moderate in reading and writing

Bengali: Fluent in reading, writing and conversation

SELECTED RECENT PUBLICATIONS

K. C. Paul, T. Takemura, M. Nakayama, and T. Igarashi, “Efficiency improvement of ultra high

pressure projector lamps by reflecting the unused UV radiation back into the lamp ”, Proc. 12th

Int. Symp. on the Science and Technology of Light Sources (Eindhoven, Netherlands), pp. 297-

298 (July, 2010).

K. C. Paul, T. Takemura, T. Hiramoto, M. Yoshioka, T. Igarashi, Y. Horikawa, T. Tsukamoto,

and A. Sugitani, “Development of a robust 3-D model for HID lamps and comparison of

predicted and measured electrode temperatures,” IEEE Trans. Plasma Science, invited, 35, 188-

196 (2007).

K. C. Paul, T. Takemura, T. Hiramoto, A. Erraki, F. Dawson, G. Zissis, J.J. Gonzalez, A.

Gleizes, M.S. Benilov, and J. D. Lavers, “Self-consistent model of HID lamp for design

applications,” IEEE Trans. Plasma Science, 34, 1536-1547 (2006).

K. C. Paul, T. Takemura, T. Hiramoto, M. Yoshioka, Y. Horikawa, T. Tsukamoto, and A.

Sugitani, “Theoretical and experimental investigation of an HID lamp,” Proc. 33rd IEEE Int.

Conf. Plasma Science – Invited Talk (Michigan, USA), 2A6-7, 186 (June 2006).

K. C. Paul, T. Takemura, H. Hiramoto, M. Yoshioka, and T. Igarashi, “Three-dimensional

modelling of a direct current operated Hg-Ar lamp,” IEEE Trans. Plasma Science, invited, 34,

254-262 (2006).

K. C. Paul, T. Takemura, G, Niimi, Y. Teramoto et al., “Time-dependent modelling of a pulse-

current-operated EUV radiation source,” Proc. 17th Int. Symp. Plasma Chemistry (Toronto,

Canada), 225-226 (August, 2005).

K. C. Paul, T. Takemura, H. Matsuno, T. Hiramoto, F. Dawson, J.J. Gonzalez, A. Gleizes, G.

Zissis, A. Erraki, and J. D. Lavers, “Predicted Results of a HID DC Current Lamp Considering a

P-1 Radiation Model,” IEEE Trans. Plasma Science, invited, 32, 118-126 (2004).

K. C. Paul, “Transient behavior of current modulated 2-T inductively coupled plasma,” IEEE

Trans. Plasma Science, invited, 32, 39-46 (2004).

K. C. Paul, T. Ishigaki, J. Mostaghimi, and T. Sakuta, “Non-equilibrated situations of pulse

modulated Ar-H2 and Ar-N2 thermal plasmas at atmospheric pressure,” J. Appl. Phys., 93, 8867-

8875 (2003).

NAME AND ADDRESS OF REFERENCES

Dr. Rich Craig, CEO, Topanga Technologies Inc., 2178 Paragon Drive, San Jose, California

95131. Tel: 650-***-****, e-mail: ****@***********.***.

Dr. Mehran Matloubian, President, Topanga Technologies Inc., 21212 Vanowen St, Canoga

Park, California 91303. Tel: 310-***-****, e-mail:******@***********.*** (and/or

***********@*****.***).

Dr. Douglas A. Doughty, Senior Scientist, Topanga Technologies Inc., 2178 Paragon Drive, San

Jose, California 95131. Tel: 408-***-****, e-mail:****@***********.***.

Prof. Francis P. Dawson, Ph.D., P.Eng., Department of Electrical & Computer Engineering,

University of Toronto, 10 King's College Rd., Toronto, Ontario, Canada M5S 3G4. Tel: +1-416-

9788540, Fax: +1-416-***-****, e-mail: ******@***.********.**.

Khokan C. Paul 4/4

Dr Georges Zissis, C. P. A. T., Université Paul Sabatier - Toulouse III, 118 rte de Narbonne, F-

31062 Toulouse Cédex 4, FRANCE. Tel: + 33-5-61556996, Fax: + 33-5-61558447, e-mail:

*******.******@*******.****-****.**.

Prof. Eiki Hotta, Ph.D., Department of Energy Sciences, Tokyo Institute of Technology, 4259

Nagatsuta, Midori-ku, Yokohama 226-8502, JAPAN. Tel: +81-45-924-****, Fax. +81-45-

924-5697, e-mail: ******@**.******.**.**.

OTHER INFORMATION :I have more than 60 scientific publications in international journal,

conference proceedings and in the form of patents. And I have been serving as

a reviewer for some journals, including those published by IEEE, AIP and

IOP.

Khokan C. Paul 5/4

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