Anglia Instruments Ltd

Laser Induced Breakdown Spectroscopy Systems (LIBS)

Laser Induced Breakdown Spectroscopy Systems (LIBS)

The LIBS technique, which is a form of atomic emission spectroscopy, uses a pulsed laser to produce material ablation and plasma formation in a single step process.

The light emitted by the luminous plasma is spectrally and temporarily resolved to yield information on the elemental composition of the sample.

The LIBS technique can be traced back to 1962 when it was first demonstrated using a pulsed ruby maser. In the 1980's, Leon Radziemski, David Cremers and co-workers at Los Alamos National Laboratory (New Mexico, USA), pioneered the development of the technique for "real-world" applications and it was from this group that the acronym LIBS first appeared.

The LIBS technique has ppm to ppb detection limits, depending on the element analysed. Furthermore, the sample does not need to be prepared (by polishing, dissolution, etc), and various foms of material may be analysed by LIBS.

Avantes new and improved AvaLIBS system is a transportable LIBS system based on a Big Sky Ultra CFR Nd:YAG laser (50mJ). The system consists of a Pelicase™ in which is located the main consol containing up to six spectrometers. The laser power supply is external to the Pelicase™ unit and connects to the main consol via detachable leads. The LIBS Head, which connects to the main consol via a flexible umbilical (3m in length), may be used in "open beam" mode when suitable laboratory facilities are available. Alternatively, the LIBS Head may be attached to a sample chamber to provide full containment of the laser radiation (ie. laser-safe operation). The main consol is semi-permanently installed inside the Pelicase™.  The LIBS Head and umbilical fit inside the Pelicase™ for storage and transport.

System specifications

LIBS Head

3m cable connection

Software

Plasus and AvaSoft

PelicaseTM Dimensions

800mm length, 520mm width, 310mmm depth

Computer Interface

USB2.0

Laser Safe Sample Chamber Dimensions

(shown fitted to LIBS head)

Approx. 150 x 150x x700mm

Pelicase is a Trade Mark of Pelican Products, Inc.

Typical laser specifications

Laser Type

Big Sky Ultra Q-switched Nd: YAG (Class 4)

Wavelength

1064nm

Energy/Pulse

50mJ/pulse

Repetition Rate

Upt o 20Hz

Power Supply

(external, water cooled)

100-220VAC

Power Supply Dimensions

370 x 200 x 180mm

Spectrometer specifications

Wavelength Range*

200-900nm

Resolution

<0.1nm

Detector Type

CCD, 2048 pixels per channel

Programmable Integration Time delay

Minimum 128µsec, 21ns steps

Integration Time

Minimum 1.1ms

Dimensions (Max. 4 channels in Pelicase housing)

175 x 110 x 44mm (1 channel)

* = Depends on number of channels

AvaSoft operating software

The AvaSoft software controls the exact timing between the laser pulse and the start of the integration time.

The timing is controlled by the laser or external pulse generator and synchronised with the AvaSpec spectrometer by running the spectrometer in external trigger mode. In this mode, the spectrometer receives a TTL-input signal from the laser, or simultaneously with the laser. The integration time delay is synchronised with this input signal.

The AvaSoft software allows averaging, setting of integration time delay and integration time. The saved data can be imported directly into the Plasus analytical software package.

Plasus Specline analytical software

Plasus Specline analytical software

 

 

 

 

 

 

 

 

 

 

 

The Plasus Specline software has an incorporated Extensive database for atoms, ions and molecules.

The Plasus Specline software can be mainly used for identification and evaluation of spectral data, imported directly from the AvaSoft software.

The unique database for atoms and molecules makes line identification fast and easy. Many evaluation functions will support you in analysing and comparing your spectra.

Functionality of Plasus software:

  • Automatic peak finding search algorithms for peak finding in the spectra.
  • Line identification - identification of atoms, molecules and their ions using the included database.
  • Data evaluation  - Data smoothing, integral, scaling, peak value, calibration, arithmetic of spectra (+,-, * ,/).
  • Comparison of data - Several spectra, even with different file formats, can be overlaid and compared.
  • Selection for database search  - periodic table for atoms and ions, wavelength and intensity range.
  • Data export - data export to ASCII, Binary and Excel(CSV) format, graphic export to BMP, WMF and WPG format.

Ordering Information

Part Number

Description

AvaLIBS-INSTRUMENT

Portable LIBS Instrument, includes Big Sky Ultra Laser 50mJ, 1064nm, 20Hz, Pelicase for 6 channels. LIBS head includes 3m cable, laser bean optics and collection optics

AvaLIBS-SAMPLEHOLDER

Basic Sample Chamber, includes interlock access lid, laser safe viewing port, OD 6+ @1064nm, manual single axis translation stage, couples to LIBS head

AvaLIBS-SPECLINE-A

Spectroscopy analytical software for LIBS, finding and identifying spectral lines, includes database for atoms and ions

AvaSpec-2048-LIBS

AvaLIBS Spectrometer channel, AvaSpec-2048-USB2, 2048 pixel CCD detector, specify grating, wavelength range and options, AvaSoft-FULL and LIBS