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A distributed real-time system for event-driven control and dynamic data acquisition on a fusion plasma experiment

J Sousa, A Combo, A Batista, M Correia, C.A.F Varandas2000年Fusion Engineering and DesignIF 1.7出版社

AbstractA distributed real-time trigger and timing system, designed in a tree-type topology and implemented in VME and CAMAC versions, has been developed for a magnetic confinement fusion experiment. It provides sub-microsecond time latencies for the transport of small data objects allowing event-driven discharge control with failure counteraction, dynamic pre-trigger sampling and event recording as well as accurate simultaneous triggers and synchronism on all nodes with acceptable optimality and predictability of timeliness. This paper describes the technical characteristics of the hardware components (central unit composed by one or more reflector crates, event and synchronism reflector cards, event and pulse node module, fan-out and fan-in modules) as well as software for both tests and integration on a global data acquisition system. The results of laboratory operation for several configurations and the overall performance of the system are presented and analysed.

日本語訳

磁気閉じ込め核融合実験のために、ツリー型トポロジーで設計され、VMEおよびCAMACバージョンで実装された分散型リアルタイムトリガー・タイミングシステムが開発された。本システムは、サブマイクロ秒の時間遅延で小さなデータオブジェクトを転送し、故障対策を備えたイベント駆動型の放電制御、動的プリトリガーサンプリング、イベント記録を可能にするとともに、全ノードにおいて正確な同時トリガーと同期を、許容可能な最適性と時間決定性をもって実現する。本論文では、ハードウェアコンポーネント(1つ以上のリフレクタークレートで構成される中央ユニット、イベント・同期リフレクターカード、イベント・パルスノードモジュール、ファンアウト・ファンインモジュール)の技術的特徴と、統合データ収集システムにおける試験および統合のためのソフトウェアについて述べる。さらに、複数の構成における実験室での動作結果と、システム全体の性能を提示し分析する。

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