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 |
Wk | Date |
Time
& place |
Speaker & Topic |
Background reading |
Comings and goings (incl. visitors in town) |
-2 |
Thu Sept 20 |
No seminar, Madrid meeting |
|||
-1 |
Thu Sept 27 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by ALEX) Alex Schekochihin --- Thermo-Alfvenic instability in tokamaks? |
typed notes on request |
Ivan Calvo (CIEMAT) Alessandro Geraldini leaves for Maryland |
0 |
Thu Oct 4. |
11:00 501 DWB |
Plasma Seminar (organised
by FELIX) Ivan Calvo (CIEMAT) --- Some recent advances in the theory and modeling of stellarator neoclassical transport |
JPP 84, 905840407 (2018) arXiv:1803.05691 |
Ivan Calvo (CIEMAT) Toby Adkins, Javier Maurino-Alperovich, & David Hosking start their DPhils |
I |
Thu Oct 11 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by ALEX) Toby Adkins --- Relaxation and nonlinearity: the phase-space dynamics of Vlasov-kinetic plasmas |
MMathPhys thesis on request |
Ivan Calvo (CIEMAT) |
II |
Thu Oct 18 |
No seminar: MAST-U opening ceremony at Culham at 10:00. Contact Lisa Jones if you want to attend. |
Steve Cowley (Princeton) |
||
III |
Thu Oct 25 |
11:00 501 DWB |
Plasma Seminar (organised
by ALEX) Alex Schekochihin --- Fluidisation of collisionless plasma turbulence |
arXiv:1808.04284 | |
IV |
Thu Nov 1 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by MICHAEL) Michael Hardman --- Simulating scale separated ion scales in practice |
draft paper/slides on request |
|
V |
Thu Nov 8 |
11:00 501 DWB |
Plasma Seminar (organised
by FELIX) Robert MacKay FRS (Warwick) --- Some mathematics about quasi-symmetry |
Robert MacKay FRS (Warwick) |
|
VI |
Thu Nov 15 |
11:00 501 DWB |
Plasma Seminar (organised
by ALEX) Mitch Begelman (Colorado) --- Kinetic modeling of particle acceleration in relativistic plasmas |
Mitch Begelman (Colorado) |
|
VII |
Mon Nov 19 |
14:00 D Sciama LT, DWB |
Astrophysics Colloquium: Mitch Begelman (Colorado) --- Accretion discs, elevated In addition to driving
turbulence that transfers angular momentum and permits accretion disks
to accrete, the magnetorotational instability also creates a strong,
relatively organized magnetic field parallel to the disk
plane. Under certain conditions, this field can build up to
the point where it dominates other forms of pressure in supporting the
disk vertically against gravity. Such "magnetically
elevated" disks would have dramatically different properties from
standard disks. I will discuss our current understanding of
elevated disks and show that their existence can resolve several
longstanding problems in accretion disk theory, applied to such systems
as quasars, X-ray binaries and cataclysmic variables.
|
Mitch Begelman (Colorado) |
|
Thu Nov 22 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by FELIX) General discussion/Michael Hardman |
|||
VIII |
Thu
Nov 29 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by FELIX) Nothing to talk about |
||
9 |
Thu Dec 6 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by FELIX) Mantas Abazorius --- Transfer report (Update on collisional presheath) |
transfer report on request |
|
10 |
Thu Dec 13 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by ALEX) Alex Schekochihin --- Constraints on ion vs. electron heating by plasma turbulence at low beta |
paper draft on request |
|
Thu Dec 20 |
11:00 501 DWB |
Plasma
Group Meeting (organised
by MICHAEL) Oliver Beeke --- Transfer report (Turbulence suppression in tokamak plasmas) |
transfer report on request |
||
Thu Dec 27 |
No seminar (Merry Xmas!) |