Sigray AttoMap™ x-ray analytical microscope

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The Sigray AttoMap™ is a powerful x-ray analytical microscope with the highest resolution and highest sensitivity laboratory micro x-ray fluorescence (microXRF) capabilities available. The system provides both transmission-based x-ray structural analysis and fluorescence chemical mapping with <1-10 ppm trace element sensitivity acquired within 1 second, comparable to 3rd generation bending magnet synchrotron microprobes. 

Such capabilities are unprecedented for a laboratory microXRF instrument, bridging the resolution and sensitivity gap toward capabilities of a LA-ICP-MS chemical mapping system. The AttoMap enables a broad range of applications including:

Examples of the AttoMap's capabilities. More can be found in our gallery. 

Examples of the AttoMap's capabilities. More can be found in our gallery


OVERVIEW AND ADVANTAGES OF THE ATTOMAP™ MICROXRF

Patented AttoMap system comprised of a patented x-ray source and x-ray optic for high throughput trace element mapping

Patented AttoMap system comprised of a patented x-ray source and x-ray optic for high throughput trace element mapping

The Sigray AttoMap™ microXRF features three major innovations in the x-ray source, x-ray optic, and x-ray detector to provide the ultimate laboratory microXRF performance. Among the outstanding capabilities of the AttoMap™ are:
  1. Substantially higher resolution at single digit microns-scale (e.g. 3-5 µm MTF) resolution versus conventional microXRF
    • Detectability of nanoparticles down to 50-100 nm

  2. Dramatically faster analytical speed of a single minute - rather than a half day - for equivalent measurements on an AttoMap versus a conventional microXRF with up to 500X higher throughput

  3. Sub-ppm and sub-femtogram sensitivity in seconds
    • >100X the sensitivity of standard microXRF
    • Only microXRF that can map trace elements (conventional microXRF is capable of mapping only major constituents at reasonable throughputs, as it requires long spot acquisition times for trace elements)

  4. Most accurate quantification capabilities and optional dual energy source for maximum flexibility

  5. Ability to analyze buried microfeatures

HOW DOES THE ATTOMAP™ ACHIEVE ITS SUPERIOR PERFORMANCE?

Conventional microXRF system design - performance is limited by x-ray source and optics

Conventional microXRF system design - performance is limited by x-ray source and optics

The completely new approach of the AttoMap uses a patented x-ray source, high efficiency x-ray optics, and optimized detector collection - these three factors provide substantially higher sensitivity and throughput than conventional polycapillary-based microXRF systems

The completely new approach of the AttoMap uses a patented x-ray source, high efficiency x-ray optics, and optimized detector collection - these three factors provide substantially higher sensitivity and throughput than conventional polycapillary-based microXRF systems

The outstanding capabilities of the Sigray AttoMap™ are enabled by three key innovations of the system:
  1. A patented x-ray source with 50X higher brightness than microfocus sources used in standard microXRFs;

  2. Proprietary, high efficiency x-ray mirror lens that provides a combination of small achromatic focus and large working distance for superior detection sensitivity and accuracy; and

  3. Unique detector geometry enabled by the design of the x-ray mirror lens that collects 10X more fluorescence x-rays than conventional designs.

Sigray Attomap™ Advantage 1:
Innovative X-ray Source

Heat distribution in a Conventional X-ray Target: Melting of the solid metal target limits power loading and source brightness

Heat distribution in a Conventional X-ray Target: Melting of the solid metal target limits power loading and source brightness

Heat distribution in the FAAST Microstructured Target: Small structures enable rapid thermal dissipation for higher power loading

Heat distribution in the FAAST Microstructured Target: Small structures enable rapid thermal dissipation for higher power loading

The AttoMap™ employs the patent-pending Sigray FAAST™ (Fine Array Anode Source Technology) x-ray source that enables over 50X higher brightness than microfocus x-ray sources employed by conventional microXRF systems. The target of FAAST™ is comprised of a fine array of metal microstructures embedded within a diamond substrate that, upon electron bombardment, produces high intensity x-rays. In comparison, conventional microfocus x-ray sources use an extended uniform metal target. 

The design of the FAAST™ source allows: 1) rapid thermal dissipation through the diamond substrate to quickly cool the microstructures and 2) linear accumulation of x-rays produced by the individual microstructures.

X-ray Source: Dual Energy & Novel energies

Due to the excellent thermal conductivity of diamond, use of novel anode materials (e.g. Pt, Cr) are now possible. Access to these new characteristic x-ray spectra is a crucial advantage of the x-ray source, as it allows for optimization of detection sensitivity to various elements of interest. A dual energy approach, in which two target materials can be used interchangeably, provides the flexibility and performance required when multiple applications are required and/or multiple elements of interest are to be detected. 

Advantage of a Dual Energy target: Shown are fluorescence cross-sections of various elements (listed in rows) as a function of the excitation energy of different targets. Using two or more target materials allows increased sensitivity to a wider range of elements.

Advantage of a Dual Energy target: Shown are fluorescence cross-sections of various elements (listed in rows) as a function of the excitation energy of different targets. Using two or more target materials allows increased sensitivity to a wider range of elements.


Sigray Attomap™ Advantage 2:
Highest Performance X-ray Optic

Sigray has developed a high efficiency, microns-scale resolution double paraboloidal x-ray condenser optic developed through a sophisticated, proprietary manufacturing process.

Key advantages of Sigray's paraboloidal Twin-Lens capillary condenser include: 1) resolution, 2) quantification, 3) working distance, and 4) flux

Key advantages of Sigray's paraboloidal Twin-Lens capillary condenser include: 1) resolution, 2) quantification, 3) working distance, and 4) flux

Key advantages of the x-ray optic over the conventional polycapillary-type optic used in conventional microXRF systems include:

  1. Substantially higher resolution (<8 µm) at a single achromatic spot versus the energy-dependent concentric spots of a polycapillary optic
  2. Best quantitative capabilities for x-ray microanalysis due to single achromatic focal spot and pencil beam focusing
  3. Much larger working distance (up to 100 mm) to maintain high resolution and for maximal analytical flexibility
  4. High flux at the sample, due to a combination of high transmission efficiency of ~80% and large numerical aperture of the optics

An overview of the comparative advantages of the optic vs. a polycapillary can be found here, and additional information can be requested below. 


Sigray Attomap™ Advantage 3:
Unique Detector Geometry and System Geometry

The long working distance and the compact form factor of the double paraboloidal mirror lens enable multiple SDD detectors to be placed close to the object to collect 10X more fluorescence x-rays than detectors used in conventional microXRF setups. Detectors in conventional microXRF systems are typically placed at an offset angle to the spot, as the halo artifact of polycapillary x-ray optics necessitates the use of an aperture. The Sigray mirror lens does not produce the halo effect. The large solid angle of collection together with the high brightness x-ray source and efficient mirror lens enables the Sigray Attomap to provide high speed analysis.

Additionally, a detector placed to detect transmitted x-rays allows simultaneous microXRF and high resolution transmission-based 2D imaging, enabling the system to truly act as an x-ray analytical microscope. 


Request More Information

Interested in how the Sigray AttoMap™ will help your particular application?

For a more in-depth technical overview and to inquire about the performance of the microXRF for your specific application, please fill out the following inquiry form:

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