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The Soft X-ray real time fast trigger system

Technical Report:

Abstract

Most current diagnostics are limited to recording data either at fixed times and data rates, or in response to certain predefined events - such as the injection of a pellet. The previous Soft X-Ray trigger system at Joint European Torus Joint Undertaking (JET)(A.W. Edwards et al., Rev Sci Instrum. 57(8), p2142, 1986) improved upon this by using Analogue Signal Processors to monitor the analogue data in real time and to provide `triggers` to the data acquisition system in response to an event such as a sawtooth collapse. This system was however limited in the type of events that could be detected. It was also incapable of being rapidly re-configured. Advances in digital electronics caused a study to be undertaken to see if this situation could be improved. The system described below is the result of this study and has successfully run at JET since the summer of 1990, providing a greatly increased quality of data as well as recording some new phenomena such as the spontaneous snake. This note has been produced to describe the function and operation of the trigger system. (author).
Publication Date:
May 01, 1992
Product Type:
Technical Report
Report Number:
JET-R-92-06
Reference Number:
SCA: 700320; PA: AIX-24:004167; SN: 93000914119
Resource Relation:
Other Information: PBD: May 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; SOFT X RADIATION; REAL TIME SYSTEMS; TRIGGER CIRCUITS; PLASMA DIAGNOSTICS; CURRENT DENSITY; DATA ACQUISITION; DATA PROCESSING; INTERNATIONAL COOPERATION; JET TOKAMAK; PLASMA CONFINEMENT; RECORDING SYSTEMS; SAWTOOTH OSCILLATIONS; 700320; PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
OSTI ID:
10109258
Research Organizations:
Commission of the European Communities, Abingdon (United Kingdom). JET Joint Undertaking
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE93610250; TRN: GB9203455004167
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
GBN
Size:
[9] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Blackler, K, Edwards, A, and Holm, J. The Soft X-ray real time fast trigger system. United Kingdom: N. p., 1992. Web.
Blackler, K, Edwards, A, & Holm, J. The Soft X-ray real time fast trigger system. United Kingdom.
Blackler, K, Edwards, A, and Holm, J. 1992. "The Soft X-ray real time fast trigger system." United Kingdom.
@misc{etde_10109258,
title = {The Soft X-ray real time fast trigger system}
author = {Blackler, K, Edwards, A, and Holm, J}
abstractNote = {Most current diagnostics are limited to recording data either at fixed times and data rates, or in response to certain predefined events - such as the injection of a pellet. The previous Soft X-Ray trigger system at Joint European Torus Joint Undertaking (JET)(A.W. Edwards et al., Rev Sci Instrum. 57(8), p2142, 1986) improved upon this by using Analogue Signal Processors to monitor the analogue data in real time and to provide `triggers` to the data acquisition system in response to an event such as a sawtooth collapse. This system was however limited in the type of events that could be detected. It was also incapable of being rapidly re-configured. Advances in digital electronics caused a study to be undertaken to see if this situation could be improved. The system described below is the result of this study and has successfully run at JET since the summer of 1990, providing a greatly increased quality of data as well as recording some new phenomena such as the spontaneous snake. This note has been produced to describe the function and operation of the trigger system. (author).}
place = {United Kingdom}
year = {1992}
month = {May}
}