The MAST data acquisition upgrade

摘要: Abstract A programme has begun on MAST to replace its ageing CAMAC and VME based data acquisition systems with new modern hardware which, together several improvements in the supporting infrastructure, will provide support for faster rates, longer-pulse operation, access higher reliability. The main principle of upgrade was use commercial off-the-shelf (COTS) well-established standards wherever possible. CompactPCI or PXI chosen as digitiser form factor CAMAC/VME, Ethernet would be used means all devices. modular architecture software framework helped minimise integration effort required phase subsystems and/or technologies whilst continuing old other systems. updated allow more versatile network-attached devices had multiple connector types, which created difficulties cable interfacing. To resolve this easy substitution, a standard interface chosen, most common type pin-out already use, assemblies were produced connect proprietary block. in-house IDA-3 storage format is unable accommodate larger file sizes increasingly difficult maintain, so it gradually phased out. NetCDF-4/HDF5 being adopted replacement, thus reducing maintenance providing that accessible Fusion community. Several infrastructure upgrades necessitated by anticipated increase traffic volume including Central Timing System, servers front-end processing, management. These have provided reliability, retrieval, greater longevity capacity extend pulse length future requirements.