OXFORD PLASMA THEORY GROUP

PLASMA SEMINARS AND GROUP MEETINGS

The style of the seminars will be informal/chaotic/interactive, following the established tradition. The format of the presentations can be a tutorial on a topic of interest, a report on just completed/ongoing/just starting/potentially interesting research projects, a literature review, a lecture by a passing visitor or anything else worthwhile that anyone cares to suggest. The speakers will be interrupted freely and asked to defend themselves. For background reading, only the most relevant or the most recent references are posted; please follow the paper trail from there. The schedule is subject to change on short notice, but what you see posted here is always up to date; the seminars are also announced via the department's seminar server (group meetings are not). Please email Alex Schekochihin if you would like to receive email updates on these seminars. "Plasma group meetings" will discuss current affairs (ongoing projects, new litearture etc.) as well as feature some presentations that are even more informal than seminars. They are open to all members of the Oxford Plasma Theory Group. While some expected contributions are pre-announced, everything is TBC and people wishing their work to be discussed can volunteer contributions without prior notice. Unlike for the seminars, there will not be full-spam-list email reminders of the group meetings. The seminars and group meetings are organised by Michael Barnes, Felix Parra and Alex Schekochihin, please contact them with any queries or if you wish to present something.

Past seminar database:
Autumn 2007; Winter-Spring 2008; Summer 2008; Autumn 2008; HT 2009; TT 2009; Summer 2009; MT 2009; HT 2009; TT 2010; Summer 2010; MT 2010; HT 2011; TT 2011; Summer 2011; MT 2011; HT 2012; TT 2012; Summer 2012; MT 2012; HT 2013; TT & Summer 2013; MT 2013; HT 2014; TT & Summer 2014; MT 2014; HT 2015; TT & Summer 2015; MT 2015; HT 2016; TT & Summer 2016; Autumn/MT 2016; HT 2017; TT & Summer 2017; Autumn/MT 2017; HT 2018; TT & Summer 2018; MT 2018; HT 2019;

  Trinity Term & Summer of 2019

The seminars/group meetings will be on Thursday at 11:00 in 501 Denys Wilkinson Building, except where indicated otherwise below.
Note also the ALP Seminars (here is a list of all Physics seminars)

If you know exactly what you are going to do, what is the point of doing it? Pablo Picasso

Every line in your calculations ends with "=0". You are not making much progress!
Kate Hammett
We don't do the calculation because we don't know the answer, we do it because we have a conscience. Bryan Taylor
Let's change the resolution on the Unknown. Gabe Plunk
Let me put it differently: suppose we had a reactor... Per Helander
Working together takes more than one person. Bill Dorland
We can't do ultraviolence to that square bracket. Ian Abel
Field lines are forever. Bryan Taylor
This is not really an ill-posed problem, this is not a problem at all. Paul Dellar
I am just doing mathematics at the moment, but it is mathematics that has some point. Bryan Taylor
The equivalent of God in MAST is MHD, which is global and all powerful. Anthony Field
I've got a fishbone coming up. Tim Horbury
We have crossed all the i's and dotted all the t's. Job's a good'un. Ian Abel
Let us not jump in front of the bandwagon! Alex Schekochihin
It's not the triviality, it's the emptiness of it that bothers me. Bryan Taylor
Never take 0 for an answer. Alex Schekochihin
This is a very inefficient way of achieving nothing. François Rincon
We Hankel all the way in and then Hankel all the way out. Joseph Parker
For the sake of fairness, let me mention that some people have objections to this, none of which are particularly valid. Chris Chen
Yes, Steve, you have always known what we have only just figured out. Alfred Mallet
This is more or less right. Perhaps less. Alfred Mallet
It is better to be roughly right than precisely wrong. Maynard Keynes 

You go ahead with your argument. I'll think. Steve Cowley
Too simple? At the end of my talk, you will beg for simplicity! Andrey Beresnyak
The point is not the point! Anonymous
This is why I am presenting this here and nowhere else: nothing is solved! Ian Abel
This calculation is not intellectual masturbation: there's no orgasm. Anonymous
There are many big Buts here... I like big Buts. Matt Kunz
Previous studies of this problem have been either unsatisfactory or limited in scope.---What  is the difference between these?---This means either wrong or irrelevant.
Anatoly Spitkovsky, Michael Medvedev and Steve Cowley (in conversation)
I don't give a damn about astrophysics, explain to me what is going on. Anatoly Spitkovsky
Have you subtracted the baby with the bathwater? Steve Balbus
 
This is not rigour, unless you mean rigor mortis. Ian Abel
I wouldn't say these are theoretical arguments... Let's just call them arguments. François Rincon
You can never be too happy with the state of your closure. Amitava Bhattacharjee
For this plot, 1 is 6.--- Weeell, not even. Steve Cowley and Steve Balbus
Это качественное объяснение недостаточно качественное. Eugene Churazov
If you mean it seriously, this is actually a very good question. Minhyong Kim
This paper is a tour de farce. Ian Abel
What is modelling? You run a simulation, you compare. If it coincides, great! If it doesn't coincide, fuck! Felix Parra
We are stuck at x=0. Felix Parra
I have seen papers where the student wasn't the problem. Michael Hardman
There has been a lot of fascinating work on this subject, most of it kind of boring. Philipp Kempski
[these quotes are mostly from Oxford plasma seminars and Vienna meetings]

Wk Date
Time
& place
Speaker & Topic
Background reading
Comings and goings
(incl. visitors in town)
0
Thu
Apr 25
11:00
501
DWB
Plasma Journal Club (organised by JASON & PLAMEN)
Universal modes:
Mikhailovskii & Rudakov, Sov. Phys. JETP 17, 621 (1963); Krall & Rosenbluth, PoF 8, 1488 (1965)
& the more recent development: Landreman, Plunk & Dorland, JPP 81, 905810501 (2015)

I
Thu
May 2
11:00
501
DWB
Plasma Seminar (organised by ALEX)
Ilya Dodin (Princeton) --- Quantumlike modeling of drift-wave turbulence: recent updates
JPP 85, 905850101 (2019)
arXiv:1902.04970
arXiv:1902.06870
Ilya Dodin
(Princeton)
Thu
May 3
14:00
D Sciama
LT
Theoretical Physics Colloquium:
Ilya Dodin (Princeton) --- Structure from turbulence, or why you might want to care about plasma physics even if you are not a plasma physicist
Turbulence may appear as impenetrably complicated when studied in terms of "low-level" quantities such as the fluid velocity or the electrostatic potential. However, it can be greatly simplified in variables that are more abstract yet also more meaningful specifically as characteristics of turbulence. In particular,  the typical equations that emerge in turbulence theory can be put in the same form as those that govern nondegenerate quantum plasmas, which are easier to understand. I will overview the basic idea of how to map turbulence equations to plasma equations and how to keep them intuitive; in essence, using the Weyl calculus is the key. I will also illustrate this idea with examples from Rossby/drift-wave turbulence, which is ubiquitous in fluids and plasmas. Similar applications to other types of turbulence are also possible and anticipated.
II
Tue
May 7
16:00
D Sciama
LT
Special Astro/Plasma Seminar:
Mattia Sormani (ITA Heidelberg) --- Understanding the gas dynamics in the central 3 kpc of the Milky Way

Bence Kocsis
(Eotvos Lorand U,
Budapest)
Mattia Sormani
(ITA Heidelberg)
Thu
May 9
11:00
501
DWB
Plasma Journal Club (organised by TOBY)
What you really want to know about G-transform but are afraid to ask:
Heninger & Morrison, PoP 25, 082118 (2018)
Morrison, Transport Theory & Stat. Phys. 29, 397 (2000)
Morrison, PoP 1, 1447 (1994)
14:00
D Sciama
LT
Special Astro/Plasma Seminar:
Bence Kocsis (Eotvos U, Budapest) --- Liquid crystals of stars and black holes at the centers of galaxies

III
Thu
May 16.
11:00
501
DWB
Plasma Group Meeting (organised by MICHAEL)
Valerian Chen --- TBA


IV

Mon
May 20
11:30
D Sciama
LT
Special Astro/Plasma Seminar:
Jason Sanders (IoA Cambridge) --- Our multi-dimensional, time-evolving Galaxy

J-B Fouvry
(IAS Princeton)
Jason Sanders
(IoA Cambridge)
Jono Squire
(Otago)
Thu
May 23
11:00
D Sciama
LT
Plasma Seminar & Special Astro/Plasma Seminar:
Jean-Baptiste Fouvry (IAS Princeton) --- Resonant relaxation of stars around a supermassive black hole

V

Tue
May 28
11:00
D Sciama
LT
Special Astro/Plasma Seminar:
Jono Squire (Otago) --- Resonant drag instabilities and the fluid dynamics of planet formation

Jono Squire
(Otago)
Thu
May 30.
11:00
501
DWB
Plasma Group Meeting (organised by FELIX)
No fixed agenda, spontaneous contributions welcome

VI
Thu
June 6.
11:00
501
DWB
Plasma Group Meeting (organised by MICHAEL)
No fixed agenda, spontaneous contributions welcome

Francis Casson
(UKAEA)
VII
Thu
June 13
11:00
501
DWB
Plasma Seminar (organised by ALEX)
Ben McMillan (Warwick) --- The edge of chaos and simple advecting structures in gyrokinetic simulations
PoP 16, 022310 (2009)
FDR 46, 061403 (2014)
JPP 84, 905840611 (2018)
Francis Casson
(UKAEA)
Ben McMillan
(Warwick)
VIII
Thu
June 20
11:00
501
DWB
Plasma Seminar (organised by FELIX)
Francis Casson (UKAEA) --- Predictive multi-channel flux-driven modelling to optimise tungsten control and fusion performance in JET

Francis Casson
(UKAEA)
Bill Dorland
(Maryland)
9
Thu
June 27
11:00
501
DWB
Plasma Seminar (organised by ALEX)
Michael Nastac (Maryland) --- Fluctuation-dissipation relations for plasma-kinetic Langevin equations with toroidal geometry
JPP 81, 305810104 (2014)
Francis Casson
(UKAEA)
Bill Dorland,
Michael Nastac
(Maryland)

Thomas Foster
joins the group
as summer intern

Vincent d'Hebremont
(Paristech)
joins the group
as MSc researcher
10
Thu
July 4.
11:00
501
DWB
Plasma Group Meeting (organised by FELIX)
Felix Parra & Sarah Newton --- Some ideas for edge gyrokinetics

Bill Dorland,
Michael Nastac
(Maryland)

Robert Ewart
joins the group
as summer intern


Wed
July 10
11:00
J. Paton
Rm
Plasma Journal Club (organised by JASON)
"Stellarators with permanent magnets" by Helander et al.: arXiv:1907.01363

Bill Dorland,
Michael Nastac
(Maryland)

Wed
July 17
11:00
501
DWB
Plasma Seminar (organised by ALEX)
Young-chul Ghim (KAIST) --- Nonlinear energy transfer of ELMs

Bill Dorland,
Michael Nastac
(Maryland)
Young-chul Ghim
(KAIST)
David Hatch
(UT Austin)
Romain Meyrand
(LPP Paris)


Tue
July 23
11:00
501
DWB
Plasma Seminar (organised by ALEX)
Chris Bambic (Cambridge) --- Powerful sound waves from AGN jets
arXiv:1906.03272
Chris Bambic
(Cambridge)
Bill Dorland,
Michael Nastac
(Maryland)
Yohei Kawazura
(Tohoku U)
Jens Rasmussen,
Anders Nielsen
(DTU, Copenhagen)

Georgia Acton
joins the group
as summer intern

Wed
July 24
15:30
Simpkins

Lee Rm,
Beecroft
Plasma Journal Club (organised by MICHAEL HARDMAN)
"Persistence of ITG turbulent transport at finite normalized pressure" by Ishizawa et al.: PRL 123, 025003 (2019)

Thu
July 25
11:00
Simpkins
Lee Rm,
Beecroft
Plasma Seminar (organised by FELIX)
Jens Juul Ramussen (DTU, Copenhagen) --- Investigations of transport properties and profiles in the scrape-off layer of magnetically confined plasmas---the HESEL code
PoP 23, 032306 (2016)
PPCF 58, 014031 (2016)
PPCF 59, 025012 (2017)

July 29 - Aug 9
Vienna Workshop

Thu
Aug 1
No seminar
Juan Ruiz Ruiz
joins the group as postdoc

Thu
Aug 8.
No seminar


Thu
Aug 15
11:00
501
DWB
Plasma Seminar (organised by ALEX)
Juan Ruiz Ruiz (Oxford) --- Validation of gyrokinetic simulations in NSTX and comparisons with a synthetic diagnostic for high-k scattering
++some new/preliminary results on ion-scale turbulence and Dimits shift
JRR's PhD Thesis
Jan Siuta
joins the group
as summer intern;
Denis St-Onge
joins the group as postdoc


Thu
Aug 22
11:00
501
DWB
Plasma Journal Club (organised by JASON & PLAMEN)
"Maximum-entropy states for magnetised ion transport" by Kolmes et al.: arXiv:1907.01519



Thu
Aug 29
11:00
501
DWB
Plasma Seminar (organised by FELIX)
Gregor Birkenmeier (IPP, Garching) --- The magic of the transition to high confinement at ASDEX Upgrade
Experimental background:
NF 52, 012001 (2012)
NF 54, 083003 (2014)
Thomas Foster's
internship ends

Thu
Sep 5
11:00
501
DWB
Plasma Seminar (organised by MICHAEL)
Michail Tzanis (York) --- 3D variational MHD stability of tokamak plasmas: application to RMPs

Jan Siuta's
internship ends

Thu
Sep 12.
11:00
501
DWB
Plasma Group Meeting (organised by MICHAEL)
TBA



Thu
Sep 19.
11:00
501
DWB
Plasma Group Meeting (organised by FELIX)
TBA

Robert Ewart's
internship ends

Thu
Sep 26.
11:00
501
DWB
Plasma Group Meeting (organised by MICHAEL)
TBA

Georgia Acton's
internship ends
-1
Thu
Oct 3
11:00
501
DWB
Plasma Group Meeting (organised by ALEX)
TBA


0
Thu
Oct 10
11:00
501
DWB
Plasma Group Meeting (organised by FELIX)
TBA