Energy dispersive analyser for element sensitive detection

XRF Analysis

XRFline - an element sensitive detection system to analyse and sort metal streams by main element or alloy in process applications.

LLA-Cen4 - an innovative 4-element detector system with a fast Digital Pulse Processor for scientific applications

XRF-Line - X-Ray Fluorescence detection for processes

Schematic illustration of on-line XRF analyser line
Schematic illustration of on-line XRF analyser line

XRF-Line Process XRF Technology

The "XRF-Line" product is suitable for online detection of metals and metal alloys in online industrial processes. All elements with atomic numbers greater than that of titanium can be detected, in special cases also the elements scandium, calcium and potassium.

The system uses water-cooled high-performance X-ray tubes in combination with the latest X-ray detector technology.

Track width, measuring time and belt speed should be adapted for each order considering the analyzed material stream.

Resolution of the system:
■ Minimum track width across conveyor belt is 25mm
■ Minimum measuring time is 10 ms

Possible applications are:
■ Sorting of material flows according to alloys e.g. Steels, bronzes, brass
■ Sorting out interfering materials from material flows e.g. Meatballs, lead glass
■ Monitoring and / or analysis of output currents e.g. Shredder, mining
■ Monitoring and / or analysis of input currents e.g. Steel mill

By increasing the measurement time, a higher sensitivity for the identification can be achieved. Profitable applications with lower throughput could be the sorting of valuable alloys (such as superalloys), rare earths or elements of the platinum group.

The housing fulfills the protection class IP 65. A maintenance-free operation with 24h / 7d operation can be guaranteed.

The radiation protection at and around the conveyor belt has to be provided by the manufacturer according to the effective Radiation Protection Ordinance at the place of operation.

Publications

■ Invited talk Sensor-Based-Sorting conference 2016 in Aachen/Germany 
   "A newly developed XRF-Sensor with high sensitivity for increased sorting efficiency."

LLA-Cen4 - 4-element X-ray fluorescence detector for scientific applications

LLA_Cen4 - 4-element X-ray fluorescence detector
LLA_Cen4 - 4-element X-ray fluorescence detector

LLA-Cen4   -   4-element X-ray fluorescence detector

The detector system LLA-Cen4 consists of 4 single detectors based on state of the art X-ray fluorescence detector technology. The Silicon-Drift-Detectors from KETEK offer high count rates (>1Mcps), an excellent signal to noise ratio, excellent energy resolution (<130 eV) and a wide energy region (0.2 keV to 30 keV).

The 4 detectors are arranged in a circle around the primary beam tilted by 45° so that the axes of the detectors intersect with the axis of the primary beam in one point. The measuring point is located on the primary beam axis and 5 mm in front of the leading edge of the system.

There are 3 options for the LLA-Cen4 available:
■ 28 mm² sensitive area consisting of 4 H07-detectors (4 x 7 mm²)
■ 80 mm² sensitive area consisting of 4 H20-detectors (4 x 20 mm²)
■ 120 mm² sensitive area consisting of 4 H30-detectors (4 x 30 mm²)

The advantages of a 4-channel system over a 1-channel system with comparable sensitive area are:
■ thinner detector windows and therefore higher sensitivity at lower energies
■ better energy resolution (e.g. <129 eV for a 20 mm² and <136 eV for a 80 mm² detector)
■ 4-fold count rate (4  x  >1Mcps)

Applications for the LLA-Cen4 are e.g.:
■ ‘On the fly‘ X-Ray Fluorescence-Scans
■ XANES/EXAFS measurements on massive samples or samples with low element concentrations not suitable for absorption measurements.

Illustration of LLA-Cen4 detection unit

LLA-DPP4   -   4 channel Digital Pulse Processor

The LLA-DPP4 is a 4-channel Digital Pulse Processor offering high throughput and real-time data at low costs per detector.

With the at LLA developed 4-channel DPP it is possible to collect spectra with measurement times as short as 1 ms and send them via GBit-LAN in real-time to a PC for further processing.

The software allows storing all spectra as they are sent from the DPP or collecting any number of consecutive spectra for measurement times up to hours.

The data in the 2048-channel wide spectra are not treated or in any way corrected.

The DPP is designed for ramped reset type preamplifier signals with a range from -2V to +2V as e.g. for KETEK GmbH SDD´s, for other preamplifier outputs please ask us.

Features
■ 4 channels
■ Front-panel ports TTLin  and  TTLout  providing triggering options
■ Peaking time range: 0.1 to 1.6 microseconds
■ Adjustable flat top and threshold

LLA-DPP4 4-channel digital pulse processor

XRF SCI Softwarepackage

XRF SCI Software
XRF SCI Software

LLA-Cen4   -   Setting and control software

LLA provides a software package for setting up detectors and acquisition control.

The basic software is used to set up detector parameters like gain, peaking time, flattop or threshold as well as to monitor parameters like SDD chip temperature.

Also included are options for spectra acquisition control like measurement time and location for file storage and let one choose to store a separate file from each channel or a single file with the sum spectra of all 4 channels. A basic scan mode allows furthermore acquiring and storing a consecutive number of spectra in a single file.

Run control options:
■ Manual triggered from the software
■ Start/stop via TTLin
■ From other software via Ethernet (UDP-packets)

Device information LLA-Cen4_DPP4