Table 2 Randomized parameter ranges used for policy training

From: Active ramp-down control and trajectory design for tokamaks with neural differential equations and reinforcement learning

Parameter

Description

Minimum value

Maximum value

kdil

Main ion dilution

0.8

0.9

kHL

Fraction of the LH threshold at which the HL transition occurs

0.55

0.75

H

H factor used in the IPB89 and IPB98 scalings

0.8

1.0

Zeff

Effective ion charge

1.2

1.8

kte_ti

Ratio of volume-averaged electron to ion temperature

1.0

1.2

kN

Ratio of particle confinement time to energy confinement time

7.0

9.0

krad

Ratio of total core radiated power to bremsstrahlung

2.0

3.0

  1. Values were sampled from the ranges according to a uniform distribution.