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Tokamak World Records
2016 saw a collection of new world records claimed by EAST, KSTAR and Alcator C-Mod. The exact claims from East and KSTAR were a little difficult to fathom, but I have tried to summarise what they have claimed (to the best of my knowledge. Feel free to suggest how it might be reworded for full clarity. Here is a useful page courtesy of FuseNet which gives some more detail: Shattering fusion records during the last months of 2016
This page is not primarily intended for the non-technical audience! Nor is it likely to be complete or undisputed. World records include:
|Record||Perhaps held by . . .|
|Highest toroidal field||Alcator C-MOD, USA|
|Smallest conventional tokamak to demonstrate all the characteristics of H-mode||(Probably) COMPASS-D, UK
This record might be considered controversial. Which characteristics count?.
Note that START achieved H-mode, but is a spherical tokamak.
Also note that the Canadian T de V is the smallest machine to have contributed H-modes to the International Multi-Tokamak Database and that this has significantly affected extrapolations to ITER size machines. Machines as small as STOR-M have also demonstrated some of the features of H-mode, but perhaps not all of them.
|Largest major radius (5m)||ET, USA|
|Greatest increase in pulse duration by using AC operation (35 ms to 220 ms)||ISTTOK, Portugal|
|Greatest fusion power output (16.1 MW)||JET, EU (in divertor configuration)|
|Largest plasma volume||JET, EU in its original limiter configuration|
|Highest plasma current (7 MA)||JET, EU in limiter configuration|
|Largest DC flywheel generator||JFT-2M, Japan|
|Record NBI power injection||JT-60U, Japan|
|Highest Ion Temperature (5.2 x 108°C)||JT-60U, Japan|
|Highest fusion triple product||JT-60U, Japan|
|Longest confinement time||JT-60U, Japan|
|Highest plasma pressure, 2 bar||Alcator C-Mod, USA (2016)|
|Highest proportion of boot-strap current (100% achieved in 2006)||TCV, Switzerland|
|First fully non-plasma current driven by ECCD alone (210kA in 2000)||TCV, Switzerland|
|Most desirable second-hand tokamak (?) (Iran offered $90 million!)||T de V, Canada|
|Longest pulse duration at over 100kA plasma current (5 hours 16 minutes)||TRIAM-1M, Japan|
|Claimed longest pulse duration (29 hours) - it turns out that there is some dispute about whether this was truly a tokamak plasma or more-or-less a glow discharge. There have been claims that the plasma current was not measured. It is hard to say that it truly beats the performance of TRIAM-1M in a way that is yet useful.||ST25HTS, UK|
|Longest H-mode - two significant new claims in 2016 - expect more soon!
A fully-non-inductive H-mode for 61 sec, with a tungsten ITER-like divertor.
H-mode plasma stable for 70 seconds, achieved by operating the device in the so-called 'high poloidal beta scenario'.
EAST, China (2016)
KSTAR, S Korea (later 2016)
|Highest injected/extracted energy (1.1GJ in a pulse)||Tore Supra, France|
|Highest beta achieved in a tokamak (40%)||START, UK|
|Largest number of TF coils (56 coils)||Ormak, USA|
|Smallest number of TF coils (4 coils?)||Alcator A, USA|
|Largest tokamak under construction||ITER|
If you would like to suggest another world record to add to this table, please contact me with evidence to support your claim.