Latest Results from the Front End Test Stand High Performance H{sup -} Ion Source at RAL

The aim of the Front End Test Stand (FETS) project is to demonstrate that chopped low energy beams of high quality can be produced. FETS consists of a high power Penning Surface Plasma Ion Source, a 3 solenoid LEBT, a 3 MeV RFQ, a chopper and a comprehensive suite of diagnostics. This paper briefly...

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Bibliographic Details
Main Authors: Faircloth, D. C., Lawrie, S. R., Letchford, A. P., Gabor, C., Whitehead, M., Wood, T., Perkins, M.
Format: Conference Proceeding
Language:English
Subjects:
07 ISOTOPES AND RADIATION SOURCES
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALKALI METALS
ANIONS
BEAM CURRENTS
CESIUM
CHARGED PARTICLES
CURRENTS
ELECTRIC COILS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELEMENTS
ENERGY RANGE
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION SOURCES
IONS
METALS
MEV RANGE
NONMETALS
PLASMA
PLASMA DIAGNOSTICS
SOLENOIDS
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Summary:The aim of the Front End Test Stand (FETS) project is to demonstrate that chopped low energy beams of high quality can be produced. FETS consists of a high power Penning Surface Plasma Ion Source, a 3 solenoid LEBT, a 3 MeV RFQ, a chopper and a comprehensive suite of diagnostics. This paper briefly outlines the status of the project, hardware installation and modifications. Results from experiments running the H{sup -} ion source at 2 ms pulse length are detailed: the discharge current is varied between 20 A and 50 A. The discharge repetition rate is varied between 12.5 and 50 Hz. Hydrogen and Caesium vapour flow rates are varied. The effect of electrode surface temperature and beam current droop are discussed. Peak beam currents of over 60 mA for 2 ms pulse length can be achieved. Normalised r.m.s emittances of 0.3 {pi}mm.mrads at the exit of the LEBT are presented for different source conditions.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.3637390