TY - JOUR
T1 - Implementation of a new Disruption Mitigation System into the control system of JET
AU - JET EFDA Contributors
AU - Jachmich, Stefan
AU - Kruezi, Uron
AU - Card, Peter
AU - Deakin, Kieron
AU - Kinna, David
AU - Koslowski, Hans Rudolf
AU - Lambertz, Horst Toni
AU - Lehnen, Michael
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - A new Disruption Mitigation System (DMS) based on Massive Gas Injections (MGI) has been installed at the JET-tokamak. The key component of this system is a fast eddy current driven valve, which is capable of injecting up to 4.6 × 10-3 MPa m3 in less than 5 ms. Along with this valve a new gas handling system has been installed, whose control had to be integrated into the JET-operation. The operation of the DMS requires interaction with several other systems. Although Massive Gas Injections are used to ameliorate potentially severe damage to the tokamak plant and plasma facing components caused by disruptions, they introduce a high risk for example to auxiliary heating systems or diagnostics, which could be damaged by high vacuum pressures. In addition to this, the presence of high pressure (of noble and flammable gases) in combination with high voltages represents a risk not only to the actual DMS plant itself (in case of a failure) but also to personnel in the vicinity. These varieties of risks have been addressed and are described in this article.
AB - A new Disruption Mitigation System (DMS) based on Massive Gas Injections (MGI) has been installed at the JET-tokamak. The key component of this system is a fast eddy current driven valve, which is capable of injecting up to 4.6 × 10-3 MPa m3 in less than 5 ms. Along with this valve a new gas handling system has been installed, whose control had to be integrated into the JET-operation. The operation of the DMS requires interaction with several other systems. Although Massive Gas Injections are used to ameliorate potentially severe damage to the tokamak plant and plasma facing components caused by disruptions, they introduce a high risk for example to auxiliary heating systems or diagnostics, which could be damaged by high vacuum pressures. In addition to this, the presence of high pressure (of noble and flammable gases) in combination with high voltages represents a risk not only to the actual DMS plant itself (in case of a failure) but also to personnel in the vicinity. These varieties of risks have been addressed and are described in this article.
KW - Disruption detection
KW - Disruption mitigation
KW - Massive Gas Injection
KW - Real-time control
UR - http://www.scopus.com/inward/record.url?scp=84942835043&partnerID=8YFLogxK
U2 - 10.1016/j.fusengdes.2015.01.047
DO - 10.1016/j.fusengdes.2015.01.047
M3 - Article
AN - SCOPUS:84942835043
SN - 0920-3796
VL - 96-97
SP - 633
EP - 636
JO - Fusion Engineering and Design
JF - Fusion Engineering and Design
ER -