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;

  Trinity Term & Summer of 2018

The seminars/group meetings will be on Thursday at 11:30 in Jack Paton Room, Beecroft 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
It is better to be roughly right than precisely wrong. Maynard Keynes 

This is more or less right. Perhaps less. Alfred Mallet
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
[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)

Thu
Apr 12
No seminar


0
Thu
Apr 19.
11:30
501
DWB
Plasma Group Meeting (organised by FELIX)
Free discussion


I
Thu
Apr 26
11:30
501
DWB
Plasma Seminar (organised by GIANLUCA & ALEX)
Ravindra Kumar (TIFR) --- Ultrafast dynamics of hot, dense plasmas created by relativistic-intensity, femtosecond lasers
I will present the femtosecond/picosecond dynamics of the hot, dense matter created by 30 femtosecond, relativistic intensity, 800 nm laser pulses. Specific examples presented will include (a) mapping the lifetime of dense, relativistic electron bunches in a solid via picosecond gated Cherenkov emission and (b) shock propagation and shock control.
PRL 120, 065001 (2018)
PoP 24, 072702 (2017)
PRL 114, 115001 (2015)
Ravindra Kumar
(TIFR)
II
Thu
May 3
11:30
Paton
Rm
Plasma Seminar (organised by FELIX)
Jesus Ramos (MIT) --- Landau damping of sound waves in kinetic magnetohydrodynamics
JPP 83, 725830601 (2017)
Ravindra Kumar
(TIFR)
Jesus Ramos
(MIT)
III
Thu
May 10
11:30
Paton
Rm
Plasma Seminar (organised by ALEX)
Luca Franci (Queen Mary) --- Interplay between plasma turbulence and magnetic reconnection around and below the ion characteristic scales
ApJ 850, L16 (2017)
ApJ 853, 26 (2018)
Luca Franci
(Queen Mary)
Edmund Highcock
(Chalmers)
IV
Mon
May 14
13:00
Paton
Rm
Orion/GSI Experimental Meeting (organised by GIANLUCA)
13:00 G. Gregori --- Overview of particle acceleration experiments
13:30 A. Bott --- Omega turbulent amplification
14:30 B. Albertazzi --- LULI2000 Blast wave experiments
15:00 C. Palmer --- GSI planning
15:30 Tea/Coffeee
16:00 A. Casner --- Overview of LULI2000 TurboHEDP experiments and Orion simulations
17:00 Scheduling and targets
Maurizio Ottaviani
(CEA)
Thu
May 17
11:30
Paton
Rm
Plasma Seminar (organised by ALEX)
Maurizio Ottaviani (CEA Cadarache) --- Fast secondary reconnection and the sawtooth crash

PoP 24, 012102 (2017)
V
Thu
May 24
11:30
501
DWB
Plasma Group Meeting (organised by ALEX)
Plamen Ivanov --- Zonal flows and drift waves: recent progress, in Oxford and elsewhere
PoP 25, 012308 (2018)
PPCF 59, 055002 (2017)
JPP 83, 905830504 (2017)
PoP 25, 022505 (2018)
PoP 25, 052102 (2018)
arXiv:1805.02233
arXiv:1805.04086

VI
Thu
May 31
11:30
501
DWB
Plasma Seminar (organised by MICHAEL)
Will Potter (Oxford Astro) --- Magnetisation and reconnection rates in jets

MNRAS 465, 337 (2017)

VII
Thu
June 7.
11:30
501
DWB
Plasma Group Meeting (organised by FELIX)
TBA


VIII
Thu
June 14
11:30
501
DWB
Plasma Seminar (organised by ALEX)
Anatoly Neishtadt (Loughborough) --- Long term behaviour of slow-fast systems with passages through resonances: examples from charged particles dynamics
The talk will be devoted to  effects of resonances in so-called systems with fast rotating phases. Principal phenomena here are capture into a resonance and scattering on resonances. The considered systems contain a small parameter, epsilon. In the first part of the talk, time intervals of length 1/epsilon will be considered. In the second part of the talk, results from the first part will be used to describe dynamics on time intervals of length >>1/epsilon.
Arnold, Kozlov, Neishtadt, Mathematical aspects of classical and celestial mechanics (Springer, 2006), Sec. 6.1.7
Ruth Math Surv 69, 771 (2014)
(towards end of this review)
Physica D 141, 281 (2000)
JETP Lett 89, 441 (2009)
PoP 23, 090701 (2016)
JPP 84, 905840206 (2018)
Bill Dorland
(Maryland)
Romain Meyrand
(LPP, Paris)
Anatoly Neishtadt
(Loughborough)
9
Thu
June 21.
11:30
501
DWB
Plasma Group Meeting (organised by FELIX)
Open mic discussion



Thu
June 28
11:30
501
DWB
Plasma Seminar (organised by ALEX)
Sir Steve Cowley (Oxford--->Princeton) --- Secondary reconnection and explosive instability



Thu/Fri
July 5-6
Rudolf Peierls Symposium on Theoretical Physics
Ben Chandran
(UNH)
Nuno Loureiro
(MIT)
Eliot Quataert
(UC Berkeley)

July 9-13
Planets, Stars and Discs: A Golden Age for Particle and Gas Dynamics (Celebrating the 70th birthday of John Papaloizou)
Ben Chandran
(UNH)
Thu
July 12
No plasma seminar, do go to the conference talks

Thu
July 19
11:30
Paton
Rm
Plasma Group Meeting (organised by ALEX)
Plamen Ivanov and Valerian Chen --- report on the EPS Plasma Conference



Thu
July 26.
14:30
Simpkins
Lee Rm
Plasma Seminar (organised by FELIX)
John Wright (MIT) --- From Core to Edge: a new approach to RF modeling

John Wright
(MIT)

Thu
  Aug 2
No seminar, Vienna meeting


Thu
Aug 9
11:30
Freeman
Rm
Plasma Group Meeting (organised by ALEX)
Archie Bott and Michael Hardman --- Highlights and thoughts from the Vienna meeting
Vienna slides and readings
Bill Dorland
(Maryland)

Thu
Aug 16
11:30
Freeman
Rm
Plasma Group Meeting (organised by ALEX)
What is everyone up to? Free discussion.



Thu
Aug 23.
11:30
Freeman
Rm
Plasma Group Meeting (organised by MICHAEL)
TBA



Thu
Aug 30.
11:30
Freeman
Rm
Plasma Group Meeting (organised by FELIX)
TBA



Mon
Sept 3
11:30
Freeman
Rm
Plasma Seminar (organised by ALEX)
Paolo Ricci (EPFL) --- New insights on scrape-off layer plasma turbulence
One of the greatest uncertainties in the success of ITER and future fusion reactors is related to the turbulent dynamics of the fusion fuel in the scrape-off layer (SOL). The plasma behavior in this region governs the overall confinement of a tokamak, regulates the impurity dynamics and the level of fusion ashes, and determines the heat load to the tokamak vessel walls – a showstopper for the whole fusion program if material requirements cannot be met. With the goal of improving our understanding of plasma turbulence in the SOL, the GBS code has been developed in Lausanne during the past few years.  By solving the drift-reduced Braginskii equations coupled to a kinetic equation for the neutrals, GBS evolves self-consistently the SOL dynamics as it results from neutral recycling, turbulent transport, and plasma losses at the vessel. GBS simulations have led, for example, to the identification of the instabilities driving SOL turbulence and to a first-principles estimate of the turbulence saturation amplitude and of the SOL pressure scale length. We will present our simulation and theoretical results, as well as their comparison with experimental measurements from several tokamaks worldwide.

Paolo Ricci
(EPFL)
Thu
Sept 6.
11:30
Paton Rm
Plasma Group Meeting (organised by MICHAEL)
TBA


Thu
Sept 13.
11:30
Paton Rm
Plasma Group Meeting (organised by FELIX)
TBA



Thu
Sept 20
No seminar, Madrid meeting


Thu
Sept 27
501
DWB
Plasma Group Meeting (organised by ALEX)
TBA

Ivan Calvo
(CIEMAT)
0
Thu
Oct 4
501
DWB


Ivan Calvo
(CIEMAT)
I
Thu
Oct 11
501
DWB


Ivan Calvo
(CIEMAT)