The Genesis Solar Wind Concentrator

Nordholt, J. E.; Wiens, R. C.; Abeyta, R. A.; Baldonado, J. R.; Burnett, D. S.; Casey, P. J.; Everett, D.; Kroesche, J. L.; Lockhart, Walter; MacNeal, Paul D.; McComas, D. J.; Mietz, Donald E.; Moses, R.W.; Neugebauer, M.; Poths, J.; Reisenfeld, D. B.; Storms, S. A.; Urdiales, C.

doi:10.1007/978-94-010-0241-7_3

Cited by 8 publications

(11 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1). The latter is an ion-focusing device that was designed to enhance the solar wind ion flux by an average factor of 25 (Nordholt et al, 2003). It turned out that the maximum concentration factor was close to 50 ).…”

Section: Analyzed Target Materialsmentioning

confidence: 99%

“…Additionally, the Concentrator incorporated a number of features to prevent contamination both from within the instrument and from ions originating outside of the instrument. To prevent external ionic contamination, a positive grid was maintained for the vast majority of the time at potentials of 1-1.3 times the mean proton energy per charge, up to >1.5 kV (Nordholt et al, 2003). The primary purpose was the rejection of $80% of the protons to prevent radiation damage to the target.…”

Section: Flight Gca Analysismentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen isotopes in the recent solar wind from the analysis of Genesis targets: Evidence for large scale isotope heterogeneity in the early solar system

Marty

Zimmermann

Burnard

et al. 2010

Geochimica et Cosmochimica Acta

Self Cite

101

View full text Add to dashboard Cite

Section: Analyzed Target Materialsmentioning

confidence: 99%

Section: Flight Gca Analysismentioning

confidence: 99%

Nitrogen isotopes in the recent solar wind from the analysis of Genesis targets: Evidence for large scale isotope heterogeneity in the early solar system

Marty

Zimmermann

Burnard

et al. 2010

Geochimica et Cosmochimica Acta

Self Cite

101

View full text Add to dashboard Cite

“…2003). The quadrants were held onto a base plate using an electroplated‐gold stainless steel fitting (the “gold cross”; Nordholt et al. 2003).…”

Section: Samples and Experimental Proceduresmentioning

confidence: 99%

“…To increase the fluence of oxygen and nitrogen, and presumably the analytical precision of the isotopic analyses, solar wind ions were concentrated onto a special target (Fig. 1) using an electrostatic mirror referred to as the Genesis concentrator (Nordholt et al. 2003; Wiens et al.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Isotopic and elemental fractionation of solar wind implanted in the Genesis concentrator target characterized and quantified by noble gases

Heber

Wiens

Jurewicz

et al. 2011

Meteorit & Planetary Scien

Self Cite

View full text Add to dashboard Cite

Abstract-We report concentrations and isotopic compositions of He, Ne, and Ar measured with high spatial resolution along a radial traverse of a silicon carbide (SiC) quadrant of the Genesis mission concentrator target. The Ne isotopic composition maps instrumental fractionation as a function of radial position in the target: the maximum observed isotopic fractionation is approximately 33& per mass unit between the center and periphery. The Ne fluence is enhanced by a factor of 43 at the target center and decreases to 5.5 times at the periphery relative to the bulk solar wind fluence. Neon isotopic profiles measured along all four arms of the ''gold cross'' mount which held the quadrants in the concentrator target demonstrate that the concentrator target was symmetrically irradiated during operation as designed. We used implantation experiments of Ne into SiC and gold to quantify backscatter loss and isotopic fractionation and compared measurements with numerical simulations from the code ''stopping and range of ions in matter.'' The 20 Ne fluence curve as a function of radial distance on the target may be used to construct concentration factors relative to bulk solar wind for accurate corrections for solar wind fluences of other light elements to be measured in the concentrator target. The Ne isotopic composition as a function of the radial distance in the SiC quadrant provides a correction for the instrumental mass-dependent isotopic fractionation by the concentrator and can be used to correct measured solar wind oxygen and nitrogen isotopic compositions to obtain bulk solar wind isotopic compositions.

show abstract