Section III. Ion sources and instrumentationOptimizing the geometry of a negative ion sputter source
References (4)
- et al.
Cited by (16)
<sup>36</sup>Cl measurements with a gas-filled magnet at 6 MV
2019, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :It basically follows the early developments by Synal et al. [1] who showed already in the late 1980s that 36Cl measurements are possible at 6 MV tandem accelerators. We use a Cs-gun ion source for the production of negative ions, where Cs vapor is ionized in a hot frit and then accelerated to the samples with the full sample potential (40 keV) [20]. The large distance of the hot frit to the sample surface and the open geometry minimize sample heating and the risk of cross talk from sample to sample especially for volatile elements like chlorine or iodine.
The ETH Zurich AMS facilities: Performance parameters and reference materials
2013, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :In contrast to all other nuclides described here, a Cs gun ion source is used for the 36Cl measurements (Fig. 1). In this ion source, the Cs vapor is ionized on a hot frit and the sample is sputtered with the Cs beam under an angle of 30° [13,26]. The advantage of this open type of ion source over the spherical one is the better control of the Cs intensity and the reduction of the risk of cross-contamination.
New Be-cathode preparation method for the ETH 6 MV Tandem
2013, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsCitation Excerpt :For example, a positive effect of a Nb matrix on the negative ion current of BeO has not been observed with the ETH Zurich High Current Ion Source (HCS) used with the 6 MV Tandem, while BeO samples mixed with Nb instead of Ag perform better (with respect to BeO− output) in the NEC ion source installed at the ETH-Zurich 0.5 MV AMS system TANDY. In the context of developing carrier-free 10Be measurements at ETH Zurich [11], we had found that a combination of Fe and Ag significantly enhances the negative BeO ion output from the HCS [12] that is routinely used for 10Be and 26Al measurements with the 6 MV Tandem facility [13]. In this study, we tested whether this effect can be exploited also for conventional Be samples typically containing 100–500 μg Be carrier.
MICADAS: A new compact radiocarbon AMS system
2007, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsStatus report of the PSI/ETH AMS facility
1997, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsAcceleration of clusters, collision induced charge exchange at MeV energies and applications for materials science
1996, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
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Stanford University, Stanford, CA 94305, USA.