Scintillation NaI counter and xenon gas filled proportional counter
Scintillation NaI and xenon gas filled proportional counters are our standard detectors

Linear position sensitive proportional counter
Designed for simultaneous data collection, allows to reduce the recording time by a factor of 100 to 1000. It can measure the intensity distribution of a region of 10° or more with good spatial resolution. This detector is ideally suited for phase transformation studies as a function of temperature and stress analysis. The counter (Ar/CH4 or Xe/CH4 90:10) operates under a pressure of 7.5 bar. The detector incorporates 2 charge-sensitive preamplifiers. As option the detector can be run on different gases depending on the customer’s application. It is possible to optimise efficiency, spatial resolution and energy resolution by proper choice of the operating parameters, gas, pressure and high voltage.

Curved position sensitive counters
The CPS 120 and 590 have, as their main characteristics, the simultaneous detection of diffracted X-rays over a range of 120 and 90 degrees. The anode construction perform position analysis by applying high bias voltage and causing electron avalanche, which gives an excellent signal to noise ratio. The Curved Position Sensitive Counters can be used for a variety of applications: powder, pole figure, stress, kinetic studies etc.
Principle of the curved detector
The principle is similar to that of a linear detector. A blade shaped curved anode with a sharp edge of a radius of a few tenths of a micron an intense electric field is applied. To maximize mechanical stability, the anode was designed as a very thin curved blade (object of patent). The X photons ionize the gas in the detector. The electrons are immediately accelerated, and additionally have sufficient energy to ionize other argon atoms. A very fast multiplication phenomenon appears, so called “avalanche”. On the cathode readout strips an inducted charge arrives perpendicular to the impact point of the avalanche. The position of this charge is determined by the delay-line method. The charge travels to the left and to the right along this delay line to both ends of the line. The difference in arrival times of the charge at each end correlates to the avalanche position on the anode.
Advantages of the curved detector
In order to save time and to digitally record data, it became necessary to create an acquisition device faster than existing ones, offering easy computational treatments. Linear detectors were developed, but because of parallax errors, were not suitable for accepting a wide angular range of detection. To address these issues, the curved position sensitive detector, also called gaseous blade chamber, was designed. Because of the curvature, diffracted X-rays arrive perpendicular to the detector anode.