Milli X-Ray Fluorescence Spectrometer

Metadata Updated: March 8, 2017

The Eagle III Micro XRF unit is similar to a traditional XRF unit, with the primary difference being that the X-rays are focused by a polycapillary optic into a spot nominally 50 [HTML_REMOVED]m in size. The small, focused spot allows users to do X-ray imaging and microanalysis of a wide variety of samples where surface composition is of interest. Unlike electron beam instruments, the XRF can produce X-ray images at atmospheric pressure, and can analyze entire specimens 10 cm x 10 cm in size. Equipped with an EDAX EDS system, the system has detection limits well below 100 ppm for most elements, and below 50 ppm for transition metals such as iron, copper and zinc. Elements lighter than aluminum (Al Kalpha = 1.487 keV) are heavily absorbed by the 25 [HTML_REMOVED]m thick beryllium window in front of the detector, so the analysis of light elements is not possible. The system uses a 50 W rhodium tube with a maximum accelerating voltage of 40 keV and a maximum current of 1 mA. X-ray imaging is traditionally done with count rates of 20,000 counts per second, and X-ray images are collected for anywhere between 5 hours and 5 days. Showing remarkable stability and high stage reproducibility, the Eagle III has proven exceptionally useful in pre-imaging large samples. This technique, known as [HTML_REMOVED]Road Mapping[HTML_REMOVED] allows the analyst to identify areas of interest in images produced by the Eagle III after scanning over the entire sample. Those areas of interest are then analyzed using a variety of other microanalytical techniques. An advantage of using the Eagle III for [HTML_REMOVED]Road Mapping[HTML_REMOVED] is that the X-ray beam does not damage the sample in any way, and samples can even be analyzed in protective bags.Specifications / Capabilities:50 W rhodium tube with maximum operating potential of 40 keV, 1 mAPolychromatic 50 [HTML_REMOVED]m spotMaximum analysis area of 10 cm x 10 cmEDAX 30 mm2 Si(Li) detector. Resolution at 20,000 cps is ~170 eV (Mn Kalpha)Analysis of elements from Al to Pu (Z = 13 - 94)Analysis at ambient pressure and through bags or other protective mediaScientific Opportunities / Applications:Analysis of cement and concrete samplesImaging photographs, documents, paintings and other works of artCompositional analysis of glasses, ceramics, thin films and wafersQualitative analysis of liquids, powders and particlesParticle searching and identification for dust, ash and contaminated surfacesAnalysis of biological specimens such as leaves, grasses and rootsGeneral surface chemistry and compositional analysis.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017

Metadata Source

Harvested from Federal Laboratory Consortium Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date March 8, 2017
Metadata Updated Date March 8, 2017
Publisher Federal Laboratory Consortium
Unique Identifier 5C316A21-BAB8-4783-92DA-C9FB9265514C
Maintainer
Jeff Davis
Maintainer Email
None
Public Access Level public
Address1 100 Bureau Drive
Address2
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Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Expertise
Fax
Flcbusinessurl https://flcbusiness.federallabs.org/#/laboratory/5739
Harvest Object Id da0e96f3-9e0f-46c6-8aa3-5f87dd090f8c
Harvest Source Id 5859cfed-553c-48de-a478-b67b5225f6fc
Harvest Source Title Federal Laboratory Consortium Data.json
Mission
Owneroperatorcode
Phone
Postalcode 20899
Repphone 301-975-6988
Sizesqft 0
Source Datajson Identifier True
Source Hash 6e3e3da13213c9b4943be7877e60cdde609d119f
Source Schema Version 1.1
Statecode MD
T2Website

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