Although synchrotron radiation X-Ray fluorescence (SR-XRF) is among the least destructive analysi... more Although synchrotron radiation X-Ray fluorescence (SR-XRF) is among the least destructive analysis methods applied to rare extraterrestrial grains, we have observed radiation damage effects following high flux synchrotron analyses. Track 30 of the IS collector of the Stardust mission , containing 2 candidates dubbed Orion and Sirius was analyzed at ESRF, France, on beamlines ID13 and ID22NI by nano-XRF/XRD scanning methods. Beam damage effects were noticed on both samples and a quantitative analysis of their irradiation history was established , allowing us to propose new experimental protocols as well as fluence limits, minimizing such effects in the future. The purpose of this study is to present these facts, analyze potential damage mechanisms and offer alternatives.
Project ASTRO is a national program that partners professional and amateur astronomers with local... more Project ASTRO is a national program that partners professional and amateur astronomers with local educators at regional sites around the country. Developed by the Astronomical Society of the Pacific, Project ASTRO provides training for astronomer-educator partnerships in hands-on, inquiry-based science activities while emphasizing the importance of student preconceptions as a starting point for learning. During an intensive two-day training workshop, a partnership is forged that blends the teacher's knowledge of instructional methods and classroom management with the astronomer's knowledge of and passion for science and astronomy. The regional sites' directors and coordinators are part of a ``National Network'' whose aims are to foster communication and cooperation among its members and with other science education and research communities. Nationwide, over 500 active astronomer-educator partnerships bring the excitement of astronomy to over 20,000 students ...
The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests wi... more The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests within the US, including a very vibrant educational section. The ASP aims to play a major role in IYA2009 as shown in this article. ... Compared to the ancient olive tree that is Greece, ...
Introduction: In 2006, the Stardust spacecraft returned the first samples from a known comet and ... more Introduction: In 2006, the Stardust spacecraft returned the first samples from a known comet and the first samples of contemporary interstellar dust. The cometary dust collection consists of thousands of particles captured in aerogel and aluminum foil. Many of these particles are >10µm in size and so are relatively straightforward to analyze. The interstellar dust collection is orders of magnitude more challenging than the cometary collection for two reasons: the dust particles are less than a thousandth the mass of the typical cometary dust samples; and there are far fewer, probably only a few dozen in the entire 1000 cm 2 collector. We developed the Stardust@home project to solve a challenging problem: before any analyses of these tiny particles can be done, it is obviously first necessary to identify them. A search ~10 6 microscope fields of view is required. We enlisted the help of volunteer collaborators in the search for interstellar dust. Instrument: We adapted an automate...
Project ASTRO is a national program that partners professional and amateur astronomers with local... more Project ASTRO is a national program that partners professional and amateur astronomers with local educators at regional sites around the country. Developed by the Astronomical Society of the Pacific, Project ASTRO provides training for astronomer-educator partnerships in hands-on, inquiry-based science activities while emphasizing the importance of student preconceptions as a starting point for learning. During an intensive two-day training workshop, a partnership is forged that blends the teacher's knowledge of instructional methods and classroom management with the astronomer's knowledge of and passion for science and astronomy. The regional sites' directors and coordinators are part of a ``National Network'' whose aims are to foster communication and cooperation among its members and with other science education and research communities. Nationwide, over 500 active astronomer-educator partnerships bring the excitement of astronomy to over 20,000 students ...
The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests wi... more The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests within the US, including a very vibrant educational section. The ASP aims to play a major role in IYA2009 as shown in this article. ... Compared to the ancient olive tree that is Greece, ...
Although synchrotron radiation X-Ray fluorescence (SR-XRF) is among the least destructive analysi... more Although synchrotron radiation X-Ray fluorescence (SR-XRF) is among the least destructive analysis methods applied to rare extraterrestrial grains, we have observed radiation damage effects following high flux synchrotron analyses. Track 30 of the IS collector of the Stardust mission , containing 2 candidates dubbed Orion and Sirius was analyzed at ESRF, France, on beamlines ID13 and ID22NI by nano-XRF/XRD scanning methods. Beam damage effects were noticed on both samples and a quantitative analysis of their irradiation history was established , allowing us to propose new experimental protocols as well as fluence limits, minimizing such effects in the future. The purpose of this study is to present these facts, analyze potential damage mechanisms and offer alternatives.
Project ASTRO is a national program that partners professional and amateur astronomers with local... more Project ASTRO is a national program that partners professional and amateur astronomers with local educators at regional sites around the country. Developed by the Astronomical Society of the Pacific, Project ASTRO provides training for astronomer-educator partnerships in hands-on, inquiry-based science activities while emphasizing the importance of student preconceptions as a starting point for learning. During an intensive two-day training workshop, a partnership is forged that blends the teacher's knowledge of instructional methods and classroom management with the astronomer's knowledge of and passion for science and astronomy. The regional sites' directors and coordinators are part of a ``National Network'' whose aims are to foster communication and cooperation among its members and with other science education and research communities. Nationwide, over 500 active astronomer-educator partnerships bring the excitement of astronomy to over 20,000 students ...
The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests wi... more The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests within the US, including a very vibrant educational section. The ASP aims to play a major role in IYA2009 as shown in this article. ... Compared to the ancient olive tree that is Greece, ...
Introduction: In 2006, the Stardust spacecraft returned the first samples from a known comet and ... more Introduction: In 2006, the Stardust spacecraft returned the first samples from a known comet and the first samples of contemporary interstellar dust. The cometary dust collection consists of thousands of particles captured in aerogel and aluminum foil. Many of these particles are >10µm in size and so are relatively straightforward to analyze. The interstellar dust collection is orders of magnitude more challenging than the cometary collection for two reasons: the dust particles are less than a thousandth the mass of the typical cometary dust samples; and there are far fewer, probably only a few dozen in the entire 1000 cm 2 collector. We developed the Stardust@home project to solve a challenging problem: before any analyses of these tiny particles can be done, it is obviously first necessary to identify them. A search ~10 6 microscope fields of view is required. We enlisted the help of volunteer collaborators in the search for interstellar dust. Instrument: We adapted an automate...
Project ASTRO is a national program that partners professional and amateur astronomers with local... more Project ASTRO is a national program that partners professional and amateur astronomers with local educators at regional sites around the country. Developed by the Astronomical Society of the Pacific, Project ASTRO provides training for astronomer-educator partnerships in hands-on, inquiry-based science activities while emphasizing the importance of student preconceptions as a starting point for learning. During an intensive two-day training workshop, a partnership is forged that blends the teacher's knowledge of instructional methods and classroom management with the astronomer's knowledge of and passion for science and astronomy. The regional sites' directors and coordinators are part of a ``National Network'' whose aims are to foster communication and cooperation among its members and with other science education and research communities. Nationwide, over 500 active astronomer-educator partnerships bring the excitement of astronomy to over 20,000 students ...
The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests wi... more The Astronomical Society of the Pacific (ASP) represents a wide body of astronomical interests within the US, including a very vibrant educational section. The ASP aims to play a major role in IYA2009 as shown in this article. ... Compared to the ancient olive tree that is Greece, ...
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