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- W2012243456 abstract "This work encompasses a study of the beam position, profile, and emittance of a Lawrence Berkeley Lab (LBL) multicusp volume source. The study includes a comparison of different extraction geometries with single- and multiple-hole apertures. Our work is currently based on single-gap extraction and acceleration. These experiments are the first of a planned series of studies with various extractor geometries. The beam profile full width at half-maximum ranged from 5.7 to 10.2 mm at a position 69 mm from the emission aperture. Measurements of profile and position in the vertical direction indicate that the beam is significantly bent in the direction expected due to the field of the electron separation magnet. Phase space contour plots in the horizontal plane have been obtained for circular extraction apertures with a diameter of 1.0 and 2.0 mm, and a multiple-hole aperture with an overall diameter of 2.46 mm. Emittances were calculated to be as low as 0.0010 π cm mrad for the 1-mm aperture and 0.0014 π cm mrad for the 2-mm aperture. Emittances are not reported for the multiple-hole aperture due to the shape of the phase space contours; however, analysis of the data is in progress to provide a meaningful comparison of the single-hole and multiple-hole beam characteristics." @default.
- W2012243456 created "2016-06-24" @default.
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- W2012243456 date "1990-01-01" @default.
- W2012243456 modified "2023-09-27" @default.
- W2012243456 title "Characteristics of the negative ion beam extracted from an LBL multicusp volume source" @default.
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- W2012243456 doi "https://doi.org/10.1063/1.1141302" @default.
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