| If
you know exactly what you are going to do, what is the point of doing
it? Pablo
Picasso He goeth furthest who knows not whither he is going. Oliver Cromwell 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 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 What is the point? 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 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 & Steve Cowley (in conversation) |
It is
better to be vaguely right than exactly wrong. Carveth
Read (usually attributed to Maynard Keynes) 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 & Steve Balbus This qualitative explanation is not of sufficient quality. 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 So now you want us to drop everything we are doing and start worrying about what the big questions are?! Ian Abel Oh dear, I thought I had some conclusions. Nuno Loureiro I've got my little fingers inside this plasma. Steve Cowley Words will play a big role in this talk. Dmitri Uzdensky Everything that can be done should be done---and that's the astrophysical attitude. Michael Medvedev What I will talk about is not low-hanging fruit. A lot of people have looked at this. There is no fruit here at all.---What about sour grapes? Michael Medvedev & Nuno Loureiro In order to have a disappointment, you first have to have an appointment. Alex Schekochihin I can follow what you are doing here only in the broadest sense. Sir Steve Cowley In our experiment, we observed strong absence of magnetic energy. Archie Bott Much as I somewhat hate this approach... Peter Davidson Your infinity is my zero. Mantas Abazorius |
| Wk | Date |
Time
& place |
Speaker & Topic |
Background reading |
| -1 |
Thu Jan 7 |
11:00 ZOOM Alex for link) |
Plasma
Seminar (organised
by JASON) Justin Ball (EPFL) --- The non-twisting flux tube and beyond |
arXiv:2012.04785 |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Anna Grassi (Sorbonne) --- Exploring the physics of turbulent collisionless shocks in conditions of laboratory experiments |
|||
| 0 |
Tue Jan 12 |
14:00 ZOOM (link on webpage) |
Virtual Nordic Dynamo Seminar (organised by Axel Brandenburg) David Hosking (Oxford) --- Reconnection-controlled decay of magnetohydrodynamic turbulence and the role of invariants |
arXiv:2012.01393 |
| Thu Jan 14 |
11:00 ZOOM Alex for link) |
Plasma
Seminar (organised
by MICHAEL HARDMAN) Michael Fitzgerald (UKAEA) --- Some foundations for studying Alfven waves in tokamaks |
||
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Elizabeth Tolman (IAS, Princeton) --- Drift kinetic theory of alpha particle transport by tokamak perturbations |
arXiv:2011.04920 |
||
| I |
Thu Jan 21 |
11:00 ZOOM Alex for link) |
Plasma Journal Club (ad hoc) We have discussed "Predicting the Dimits shift through reduced mode tertiary instability analysis in a strongly driven gyrokinetic fluid limit" by A. Hallenbert, G.G. Plunk, arXiv:2012.09799 |
JPP 86, 855860502 (2020) |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Ben Chandran (U of New Hampshire) --- Understanding the building blocks of the solar wind and how they fit together: heat flux, radiation, and Alfven-wave turbulence |
arXiv:2101.04156 |
||
| II |
Thu Jan 28 |
11:00 ZOOM Alex for link) |
Plasma Journal Club (organised
by ALEX) Andrew Brown will present Kolmes & Fisch "Recovering Gardner restacking with purely diffusive operations" PRE 102, 063209 (2020) |
PoF 6, 839 (1963) JPP 83, 715830401 (2017) PoP 27, 062110 (2020) |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Anvar Shukurov (Newcastle) -- Random flows and rotation in galactic coronae |
|||
| III |
Tue Feb 2 |
14:00 ZOOM (link on webpage) |
Virtual Nordic Dynamo Seminar (organised by Axel Brandenburg) Alex Schekochihin (Oxford) --- A speculative model of imbalanced MHD turbulence |
arXiv:2010.00699 (sec 8) |
| Thu Feb 4 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by FELIX) Mantas Abazorius --- Kinetic analysis of the collisional presheath |
report from speaker on request |
|
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Cary Forest) Artem Smirnov (TAE Technologies, Inc.) --- Progress and challenges in TAE's quest towards an FRC-based fusion reactor |
|||
| IV |
Thu Feb 11 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by MICHAEL) Open mic |
|
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Cary Forest) Hartmut Zohm (IPP, Garching) --- TBA |
|||
| V |
Thu Feb 18 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by ALEX) Lorenzo Perrone (Cambridge) --- The magneto-thermal instability in galaxy clusters |
ApJ 534, 420 (2000) (see sec 4) |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Cary Forest) Uri Shumlak (U of Washington) --- Thermonuclear fusion in an equilibrium Z pinch |
|||
| VI |
Thu Feb 25 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by FELIX) Open mic |
|
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Hye-Sook Park (LLNL) --- Astrophysical collisionless shock formation and nonthermal electron acceleration in laboratory experiments |
|||
| VII |
Thu Mar 4 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by MICHAEL) Nicolas Christen --- Update on bifurcation of turbulent transport in magnetised toroidal plasmas with a sheared mean flow |
draft paper from author on request |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Howard Wilson (York) --- Plasma modelling in support of the STEP fusion reactor programme |
|||
| VIII |
Thu Mar 11 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by ALEX) Open mic: what have we done during Covid? |
|
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Matt Kunz (Princeton) --- Waves, turbulence, and transport in weakly collisional, high-beta plasmas |
PRL 119, 155101 (2017) JPP 84, 715840201 (2018) JPP 86, 905860603 (2020) |
||
| 9 |
Thu Mar 18 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by FELIX) Open mic. PS The two papers that were raised by Juan and Michael Hardman are linked in the box to the right. |
PPPCF 63, 012001 (2020) arXiv:2103.02679 |
| 15:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Cary Forest, chaired by Cary Forest) Alexander Ivanov (Budker Institute of Nuclear Physics, Novosibirsk) --- Studies of plasma confinement in the gas-dynamic trap |
|||
| Thu Mar 25 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by ALEX) Denis St-Onge --- Update on localised Dimits regimes, intrinsic rotation and a hope for ITBs |
||
| 15:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland, Jack Hare and Alex Schekochihin) Bart Ripperda (Flatiron & Princeton) --- Magnetic reconnection and plasmoid formation in black hole accretion flows |
|||
| Thu Apr 1 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by ALEX) Robbie Ewart --- A collision integral for multi-waterbag Lynden-Bell statistics |
KT Lecture Notes, Sec 10 |
|
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Kris Klein (Arizona) --- HelioSwarm: leveraging multi-point, multi-scale observations to uncover the nature of turbulence in space plasmas |
|||
| -2 |
Thu Apr 8 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by ALEX) Yohei Kawazura --- Energy partition in MRI turbulence |
preprint from author on request |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Tunde Fulop (Chalmers) --- The runaway electron landscape of cooling plasmas |
|||
| -1 |
Thu Apr 15 |
11:00 ZOOM Alex for link) |
Plasma
Group Meeting (organised
by ALEX) Plamen Ivanov --- ITG turbulence in 3D |
JPP 86, 855860502 (2020) +new preprint from author on request |
| 16:00 ZOOM (sign up to get link) |
JPP Frontiers of Plasma Physics Colloquium
(organised by Bill
Dorland and Alex Schekochihin) Alessandro di Siena (UT Austin) --- Understanding the complex interaction between supra-thermal particles and turbulence in magnetic confinement devices |