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Princeton
Plasma Physics
Laboratory
THEORY
DEPARTMENT
Theory
Seminars, 2004-2005
Theory
seminars, 2005-2006
Standard
Location: Theory Conference Room
Standard
Time: Thursday
Refreshments
are at 10:30am
Seminar
is at 10:45am
Please
note: All visitor arrangements, including Site
Access Notification , are the
responsibility of the PPPL host.
Future seminars are subject to changes due to speakers?
availability. Local, flexible speakers maybe asked to reschedule
their seminars to give opportunity for guests to deliver talks.
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Date
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Speaker
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Affiliation
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Title
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Comments
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September
23
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September
30
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October
7
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October
14
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October
21
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Roscoe White
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PPPL
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Zonal
Flow Dynamics and anomalous Transport
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October
28
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Ben
Chandran
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University
of
Iowa
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Thermal
conduction in turbulent magnetized plasmas, and its effects
in clusters of galaxies.
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November
4
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November
11
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November
18
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no
speaker
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APS
Week
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November23
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Bedros
Afeyan
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Polymath
Research, Inc.
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KEEN
Waves: Long Lived Non-stationary Nonlinear Coherent
Structures in
the
Spectral Gap of the Vlasov-Poisson
System
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Note-Tuesday
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December
3
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Roberto
Torasso
|
NYU
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"Stability
of ballooning modes in the Hall-MHD Model"
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Note-friday
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December
9
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T.S. Hahm
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PPPL
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Review
of IAEA? Theory
papers
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December
16
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Theory
meeting
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December
28
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No
speaker
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Lab
holiday
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December
30
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no
speaker
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Lab
Holiday
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January
4
|
Prof.
Baofeng Feng
|
University
of
Texas
- Pan
American
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Stable
solitary waves in two-dimensional stabilized
Kuramoto-Sivashinsky
systems
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Note
tuesday
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January
13
|
Hyeon
Park
|
PPPL
|
Study
of unsolved issues
of
m=1
oscillation
(쓡wtoothspan>)
via 2-D ECE
Imaging
System
on TEXTOR*
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January
20
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?
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January
27
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Theory
Meeting
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February
3
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February
10
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David
J Strozzi
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MIT
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Electron
Trapping in Raman Scattering from Inhomogenous
Plasmas
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February
17
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Theory
meeting Guoyong Fu and Nikolai Gorelenkov
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PPPL
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Theory/energetic
particle SFG micro-seminar
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February
24
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Mikhail
Sitnov
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Structure
and dynamics of thin non-Harris current
sheets"
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February
28
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Greg
Hammett
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PPPL
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Calculation
of Particle Noise-induced Diffusion and Its Effect on ETG
Simulations
|
Special
Monday Theory seminar located in the Display Wall Room at
1:30
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March
3
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Jay
Johnson
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PPPL
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The
magnetospheric response to the
solar wind
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March
10
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Vladimir
Yankov
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Improvement
of confinement in tokamaks by
weakening of
poloidal
magnetic field near boundary.
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March 17
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Theory
meeting
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March 24
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March 31
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John
Krommes
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PPPL
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The
Fluctuation--Dissipation Theorem (and beyond)
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April 7
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Igor
Kaganovich
|
PPPL
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Dynamics
of Ion Beam Interaction with Background Plasma
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April 15
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D. VanEster
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Laboratory
for Plasma Physics, Association ?EURATOM ?
Belgian
State
?, ERM/KMS, Trilateral Euregio
Cluster,
Brussels
,
Belgium
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A
simple method to account for drift orbit effects when
modeling radio frequency heating in tokamaks
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Please
note, this is a special Friday Seminar, to be held in the
Theory Seminar room at 11:00 am.
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April 18
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Michael
Hesse
|
Goddard
Space Flight Center/NASA
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Mechanisms
of electron demagnetization in collisionless
magnetic reconnection
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Please
note, this is a special Monday
Seminar, to be held in the Display Wall room at 10:45 am.
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April 21
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Theory
meeting
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April 28
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Harry
Mynick
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PPPL
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Tutorial
on Stellarator Transport I
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May 5
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Masaaki
Yamada and Russell Kulsrud
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PPPL
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Study
of Two-Fluid MHD Physics of Magnetic Reconnection in
Laboratory and Space Plasmas
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May 10
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Scott
Parker
|
University
of
Colorado
,
Boulder
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Gyrokinetic
simulation of the collisionless
and semi-collisional tearing
mode instability
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This
is a special Tuesday seminar, to be held at 2:00 pm in the
Theory Seminar Room.
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May 12
|
Harry
Mynick
|
PPPL
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Tutorial
on Stellarator Transport III
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May 19
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Theory
meeting
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May 26
|
Hong
Qin
|
PPPL
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A
footnote on the adiabatic invariants
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June 2
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June 9
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Shuanghui
Hu
|
UC Irvine
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Discrete
Alfven Eigenmodes
Excited by Energetic Particles in High-Beta Tokamaks
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June
16
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June 23
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June
30
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Bruce
Scott
|
IPP
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Theory
and Computation in Full-F Gyrokinetics
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July
28
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Matthew
Hole
|
Australian
National
University
|
Stepped
Pressure Profile Equilibria in
Cylindrical Plasmas via Partial
Taylor
Relaxation
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August
10
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Xianzhu
Tang
|
Los Alamos
National Lab
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Magnetic
Relaxation in Laboratory and Astrophysical Plasmas
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August
18
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Hiroshi
Naitou
|
Yamaguchi University
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Gyro-Reduced
MHD Simulation of Kinetic Internal Kink Modes
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Special Friday Seminar
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Thursday,
October 28 10:45 am
Ben Chandran
Department
of Physics & Astronomy
Universtiy
of
Iowa
Thermal
conduction in turbulent magnetized plasmas,
and
its effects in clusters of galaxies.
Clusters
of galaxies are the largest gravitationally bound objects in
the universe. They host a wealth of interesting phenomena,
from star formation on a massive scale to powerful
extragalactic jets powered by supermassive
black holes. In this talk I will describe an
outstanding theoretical puzzle in the study of galaxy
clusters, namely the need to
explain
the observationally inferred heating of galaxy-cluster
plasmas. One of the most important heating mechanisms is
thermal conduction, which is modified by turbulent intracluster
magnetic fields. I will describe how the Rechester-Rosenbluth
theory of heat conduction in stochastic fields can be
applied to this case, in which
the
mean field is negligible. I will also present recent
analytic and numerical results on electron diffusion and
field-line trajectories in strong magnetohydrodynamic
turbulence, as well as results on two other important
heating mechanisms: turbulent intracluster
motions and active galactic nuclei at the centers of
clusters.
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Tuesday,
?November
28 10:45 am
KEEN
Waves: Long Lived Non-stationary Nonlinear Coherent
Structures in
the
Spectral Gap of the Vlasov-Poisson
System
Bedros
Afeyan, Polymath Research Inc.,
Pleasanton
,
CA
We will discuss theoretical, computational and experimental
results concerning ponderomotively
driven (and released) Kinetic Electrostatic Electron
Nonlinear (KEEN) waves. Direct high resolution Vlasov-Poisson
simulations, nonlinear coupled mode theory in phase space,
and optical
mixing
experiments on the Trident laser facility at LANL will be
described whereby KEEN waves' existence was discovered,
further explained and experimentally verified, respectively.
Implications
to laser-plasma interaction physics and the large set of
unresolved anomalies in SRS spectra, for instance, will be
touched upon. Mutual interaction of KEEN waves as well as
their interactions
with
EPWs will also be described
which open up new vistas of plasma physics in the spectral
gap that was thought to exist in plasma physics based on
linear theory, quasilinear
reasoning and small amplitude nonlinear theories. KEEN waves
exist deep in the nonlinear regime with remarkable stability
properties. We will show links to Vlasov-Maxwell
simulations and general nonlinear paradigms of instability
saturation
which
have to be revisited in light of the existence of KEEN
waves.
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Friday
Dec 3,? 10:45
am
"Stability
of ballooning modes in the Hall-MHD Model"
Roberto
Torasso???
NYU
The
equations of the ballooning modes are derived
within
the Hall~magnetohydrodynamics (HMHD)
model
and given a standard Hamiltonian form.
The
Hamiltonian structure of the
equations
is used to derive sufficient conditions for stability.
In
most cases, ideal magnetohydrodynamics
(MHD) stability of ballooning
modes
implies HMHD stability, as is the case for tokamak
configurations
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