CLUSTER SIZE MEASUREMENT INSTRUMENT AND METHOD FOR CLUSTER ION BEAM DIAGNOSTIC

A detector apparatus and its use for cluster ion beam diagnostics are described. The detector has a Faraday cup with a conductance path to a gas pressure detector and a conductance to the detector exit. The detector acquires ion current, which is a measure of the ion beam flux, and also acquires mas...

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Bibliographische Detailangaben
Hauptverfasser:	GWINN, MATTHEW C, DYKSTRA, JERALD P, TORTI, RICHARD P
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY GAMMA RAY OR X-RAY MICROSCOPES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES IRRADIATION DEVICES MEASUREMENT OF NUCLEAR OR X-RADIATION MEASURING NUCLEAR ENGINEERING NUCLEAR PHYSICS PHYSICS TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR TESTING
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Beschreibung
Zusammenfassung:	A detector apparatus and its use for cluster ion beam diagnostics are described. The detector has a Faraday cup with a conductance path to a gas pressure detector and a conductance to the detector exit. The detector acquires ion current, which is a measure of the ion beam flux, and also acquires mass flux, through a pressure measurement. The pressure measurement responds to the mass of dissociated gas clusters and is combined with information about instantaneous ion current to estimate mean gas cluster ion size ({overscore (N)}i).