EFDA-JET-CP(07)03/14
Disruption Database Studies for ITER
Data on the expected characteristics of disruptions and on the nature and magnitude of disruption effects are needed for the design and functional validation of ITER components and systems. A new International Disruption Database (IDDB) has been established by the International Tokamak Physics Activity (ITPA) Topical Group on MHD, Disruption and Magnetic Control. Version 1 of the database, hosted by General Atomics, now comprises device attributes and data from a total of 3875 discharges that end in disruption or some similar type of fast plasma-current terminating event (e.g. a Vertical Displacement Event (VDE) or a Massive Gas Injection (MGI) fast plasma shutdown). The present content represents submissions from eight devices: Alcator C-Mod (2167), ASDEX Upgrade (51), DIII-D (1153), JET (200), JT-60U (20), MAST (55), NSTX (200) and TCV (29). The data cover the ranges of major radius 0.54R(m)3.19 and plasma current 0.08Ip(MA)3.42, as shown in figure 1, and an aspect ratio range of 1.27R/a6.62. The examples with R/a > 4.09 arise from a small number of reduced-minor-radius examples contained within the DIII-D data. With these data excepted, the effective range of aspect ratio for the collective v.1 data set is 1.27 R/a ~4.1. Data content of v.1 comprises some 70 scalar variables that quantify the contributing device and device-specific configuration attributes, before-disruption plasma current, shape and other disruption-relevant magnetic and kinetic attributes, plus detailed data on the rate and waveform characteristics of the plasma current decay.