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Basic papers about FCTs, and special info for FCTs in FAIR HEBT lines:
Calculated Charge Resolutions for Fast Current and Resonant Transformers
Signal Estimates and Electronics Scheme for Fast Current Transformers in High-Energy Transfer Lines
Already in 1995, four GSI-made FCTs T-DS114 had been installed in the GSI HEST lines:
GTE1DT1FP
GTE5DT1FP
GHHTDT7FP
GHTPDT1FP
After 2005, commercially available FCTs from Bergoz Instrumentation have been added to SIS 18 and ESR:
GS01DT1FP
GE02DT1FP
Main characteristics of the installed FCTs:
GSI FCT in HEST lines
Bergoz FCT in SIS18
Fig: Typical Bergoz FCT toroid
Bergoz FCT in ESR