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People of PTSG

 
Professor:

Prof. John P. Verboncoeur

Postdoctoral Researchers:

Dr. Helen Smith
Dr. Hae June Lee
Dr. Sang Ki Nam
Dr. Bin Li

Graduate Students:

Alan Wu
Yang Feng
Chul-Hyun Lim
Jonathan Noland
Ying Wang
Min Ragan-Kelley

Emeritus Professor:

Prof. Charles K.(Ned) Birdsall

Recent Visiting Scholars:

Dr. Marisa Roberto (Brazil)
Prof. Ming-Chieh Lin (Taiwan)
Dr. Hyun Chul Kim (S. Korea)
Prof. Guangsup Cho (S. Korea)
Prof. Suwon Cho (S. Korea)
Dr. Yuichi Ikeda (Hitachi Research Laboratory)
Mr. Naoki Matsumoto (Sumitomo Metals)
Prof. Miles Turner (Dublin City University)
Dr. Hide Usui (RASC, Kyoto University)

Recent Graduates:

Dr. Vahid Vahedi, now at Lam Research Corp. Fremont, CA
Dr. David Cooperberg, now at Lam Research Corp.Fremont, CA
Dr. Keith  Cartwright, now at AFRL-Kirtland
Dr. Kevin Bowers, now at DeShaw Research Associates
Dr. Peter Mardahl
Dr. Weiguang (David) Qiu
Dr. Emi Kawamura
Dr. Jeff Hammel

Current Projects in PTSG

• AFOSR: Consortium on Cathodes and Breakdown for High Power Microwave Devices
• AFOSR/Calabazas Creek Research: High Voltage Computar Laboratory
• DOE/LLNL: Hydrocarbon Transport in the Diverter Sheath
• DOE/Calabazas Creek Research: A Finite Element PIC Model

Recently Completed Projects in PTSG

• DOE: Modeling and Simulation of Plasma Edge Behavior: Formation, Stability and Heating
• ONR: Plasma Boundaries, Neutral & Non-neutral Plasma, Plasma Devices
• ONR/NRL: Simulation of Low Frequency Noise in a Coupled Cavity Traveling Wave Tube
• TECH-X: Object-Oriented PIC Code With Upgraded Physics And Platform Independent GUI
• Hitachi (Japan): Modeling and Simulation of Plasma Display Panels (PDP's)
• Sumitomo Metals (Japan):Elecromagnetic Modeling and Simulation of Sumitomo Surface Wave Plasma (SWP) Device
• LLNL (Livermore):Plasma bulk (fluids), plasma sheath (particles); bounding wall (profiler); an attempt to construct seamless boundaries at the fluid /particle/ wall  boundaries, and to run at fluid code speeds

PTSG Software

• General Information

Our practice has been to make all software developed by PTSG freely available to anyone. If you use our codes or our graphics (both are copyrighted), then please acknowledge PTSG in your publications and send us a copy of your journal articles or reports (send to Prof. Birdsall). We would also appreciate receiving copies of your input files (representative) and a copy of code changes which you have made.
 
• Acknowledgment
• For our plasma device codes (XPDP1, XPDP2, XPDS1), please acknowledge:

Verboncoeur, J.P., M.V. Alves, V. Vahedi, and C.K. Birdsall, "Simultaneous Potential and Circuit Solution for 1d bounded Plasma Particle Simulation Codes," J. Comp. Physics, 104, pp. 321-328, February 1993.
 
• For XPDP2, please acknowledge:

Vahedi, V., C.K. Birdsall, M.A. Lieberman, G. DiPeso, and T.D. Rognlien, "Verification of frequency scaling laws for capacitive radio-frequency discharges using two-dimensional simulations," Phys. Fluids B 5 (7), pp. 2719-2729, July 1993.

V. Vahedi and G. DiPeso, "Simulataneous Potential and Circuit Solution for Two-Dimensional Bounded Plasma Simulation Codes," J. Comp. Phys. 131, pp. 149-163, 1997. (Work begun at U.C. Berkeley)
 

• For XOOPIC, please acknowledge:

J.P. Verboncoeur, A.B. Langdon and N.T. Gladd, "An Object-Oriented Electromagnetic PIC Code", Comp. Phys. Comm., 87, May11, 1995, pp. 199-211.


• Description

Our most recent, popular and well kept up codes are on bounded plasma, plasma device codes XPDP1, XPDC1, XPDS1, and XPDP2. The P, C, and S mean planar, cylindrical, or spherical bounding electrodes; the 1 means 1d 3v and the 2 means 2d 3v. These are electrostatic, may have an applied magnetic field, use many particles (like hundreds to millions), particle-in-cell (PIC), and allow for collisions between the charged particles (electrons and ions, + or -) and the background neutrals (PCC-MCC). The electrodes are connected by an external series R, L, C, source circuit, solved by Kirchhoff's laws simultaneously with the internal plasma solution (Poisson's equation), The source may be V(t) or I(t), may include a ramp-up (in time). XPDP2 is planar in x, periodic in y or fully bounded in (x,y), driven by one or two sources.(For detailed information, click here)

Our older, far less well kept up codes are:

• XES1
• XIBC

 
• Distribution

Codes available (free) from our web site ptsg.eecs.berkeley.edu. The files are listed at distribution. Be sure to get xgrafix, it is required to run other programs. When multiple programs are available, choose the most recent one unless you desire an old version.

Download the software now.
• XES1
• XPDP1
• XPDC1
• XPDS1
• XPDP2
• XOOPIC
• XIBC
• XGRAFIX
• S_PARMOS


• Code Consulting and Maintanence

PTSG may answer short inquiries on our various codes, as we are primarily committed to university type plasma device research and development. However, more detailed inquiries for help should be addressed to Computational Physics Software, a small private firm well skilled in PTSG codes: cps@langmuir.eecs.berkeley.edu.

If you find bugs while using our program, please report them to us. We appreciate these information. Click here for the bug report form.

Publications Using PTSG Codes, Worldwide

Many authors, using our codes, have made acknowledgments to PTSG and sent us copies of their reports, journal articles, letters, and MS, Ph.D. theses. We appreciate both.

Since 1991, we have listed the publications brought to our attention using our codes XPDP1, XPDC1, XPDS1, XPDP2, and XOOPIC (by us and others). The total that we are aware of now exceeds 300, including over 60 by us. We are delighted to have been helpful to these authors. We are even more delighted to learn of their excellent and ingenious applications and modifications of our codes. (Go to the List of the publications)

University Course
 

We have taught a Plasma Computer Experiments Laboratory * (EE298-9) to accompany and synchronize with a semester course presented by Prof. M.A. Lieberman, EE239, Plasma-Assisted Materials Processing, based on his text (with Prof. A.J. Lichtenberg) Principles of Plasma Discharges and Materials Processing (Wiley, 1994).

*Notes are available authored by Prof. Birdsall, Dr. V.P. Gopinath, Dr. J.P. Verboncoeur; contact Prof. Birdsall. )

Short Courses
 

Members of our group (Prof. C.K. Birdsall plus Post-docs) plus Profs. D.B. Graves and M.A. Lieberman have presented 3 day courses on analytic modeling and computer simulation, with emphasis on plasma assisted materials processing (in 1990, San Francisco and Oxford; in 1992, Berkeley and Vienna; in 1993, St. Louis and for IEEE ICOPS, Boston June 1996), using our Plasma Device codes, with hands-on instruction. Prof. Birdsall has taught two and three week long courses at ICTP, Trieste, on plasma simulation, in 1985, 1989, 1991, 1993, 1995, and 1997 with post-docs Peggy Christenson, Tom Crystal, Vahid Vahedi, John Verboncoeur, and former student Dr. M. Virginia Alves. He also has taught one and two week courses at Uppsala, Tokyo, Torino, and Hitachi City in 1992, 1993, and 1994, Invitations to present similar courses are welcomed.

Workshops
 

Plasma Device Workshop 2008 (PDW2008)

We have given workshops for users of our plasma device codes. The first was on collision refinements for PIC-MCC codes, organized by Dr. V. Vahedi (of PTSG) and M. Surendra (of IBM) at the Numerical Simulation of Plasmas Conference, September 1994. The second was for PDP1, PDC1, and PDS1 users who wished to use our new 2d3v PIC-MCC codes (in x,y and r-theta, and r-z). This workshop was intensive, held in Innsbruck, Austria, 15-18 February 1995. An OOPIC Code (object-oriented PIC: release workshop (electromagnetic, relativistic e beam, collisions with neutral, x,y r,z r-theta) was held September 11-13, 1995 in Berkeley, CA. We presented an Edge Plasma Simulation Course in Innsbruck July 9, 10, 1998. The latest plasma device workshop, PDW2007, was held at Ljubljana University, Slovenia in July 2007. Inquiries are welcome (address to Prof. Verboncoeur).