Ultraportable low-power X-ray pulsed-acting device ARINA-1 is the youngest model of the ARINA X-ray family of instruments (ARINA-1, ARINA-3, ARINA-7, ARINA-9). With its help, studies of metal products with a thickness of no more than 30 mm (as applied to steel, using reinforcing fluorescent screens and highly sensitive X-ray films), and their welded joints by the method of X-ray nondestructive testing are carried out. Determined defects are lack of penetration, cracks of welded joints and structures made of ferrous and non-ferrous metals, burn-throughs, pores and foreign inclusions.
Features:
The ARINA-1 X-ray unit is a monoblock radiator with an integrated high-voltage oil-filled part of the X-ray tube power supply and control circuit, low-voltage power supply circuits of the device from an accumulator assembly of two 12-volt accumulators with a capacity of 11 Ah each, for which a special compartment is provided. The battery capacity is enough for the radiator to work for half an hour (about 500 pulses). In this case, the battery charging cycle is enough to produce about 35 X-rays with an average dose of exposure.
Thus, the main advantage of the X-ray unit ARINA-1 is the ability to work in the absence of external supply sources. The device is controlled by a small control panel, which is connected to the device with a 20-meter cable, thus ensuring the safe operation of the operator. To charge the batteries, the pulse X-ray unit is equipped with a charger from AC 220 V.
All types of ARINA flaw detectors can be used both for panoramic scanning and for directional. Good, readable X-rays are obtained by using RCF-AGFA reflective screens and AGFA F8 radiographic film.
To improve the quality of images by reducing the effect of scattered X-ray radiation on the film during frontal scanning, it is recommended to use the XRS-AP collimator.
Some details of the circuitry of devices of the ARINA series:
It is known that the tube of pulsed x-ray machines operates on the principle of explosive electron emission. Its essence is as follows: at a certain electric field strength in a vacuum diode, as a result of the strong heating of the local areas of the cathode by their own autoemission, they explode and form a dense plasma, which is an intense source of electrons. The plasma formed at the cathode leads to the creation of a liquid component from the metal on the cathode of a vacuum diode, from which micro-points are drawn under the action of an electric field and craters arise on the solid part of the cathode.
Thus, a certain cathode microrelief is created. With each current pulse, a certain number of micro-points of the cathode disappear, and some form again. This process is called the effect of a self-healing cathode, which is fully implemented in X-ray tubes used by ARINA X-ray pulse detectors.
