The Betatron SEA-7 System is one of a new generation of Betatrons that are designed to produce high energy ionising radiation for industrial radiographic Non-Destructive Testing (NDT).
The construction of the Betatron SEA-7 contains no moving parts (excluding the cooling fan) and no circulating liquids. Radiation outside the main beam is manageable, so safe working distances are moderate with conventional shielding methods. The SEA-7 has been designed for use within a dedicated X-Ray bay but also has the added advantage of being a completely portable system. With careful calculation of controlled area boundaries, the SEA-7 is also ideal for field based inspection, or for use within industrial workshops (subject to local radiation approval).
The SEA-7 produces radiographs of very high contrast, sensitivity and resolution. Half Value Layer (HVL) STEEL: 32mm
With an increase in frequency from 200Hz to 400Hz, compared to the Betatron 7.5MeV system, the output is doubled to 10Rad/Min (in air). With the duty cycle remaining at 75% per hour, the SEA-7 is the most efficient model on the market.
This system is recommended for radiographic testing of steel weld joints and castings with a thickness of 50 to 360mm, or concrete and other materials between 200 and 1200mm. The irradiation field equals 250mm x 250mm at a 1mtr focal distance. In operation, the SEA-7 has no need for ‘compensating filters’, improving uniformity of the radiation field. Betatron systems replace ‘cobalt isotope gamma sources’, eliminating the need for periodic replenishment and improving image quality. The SEA-7 is also much more cost effective than other NDT Radiators such as ‘Linacs’.
Compared to cobalt, the Betatron's shot time is drastically reduced and the extremely small focal spot size provides a sharper, higher quality radiograph, thus increasing production rate and profit.
Large forgings, castings, valves, beams, ships hulls, pressure vessels, engine blocks, thick welds, composites, reinforced concrete buildings and bridges and much more.
|Peak X-Ray Output||2 to 7MeV|
|Dose rate @ 1m||>10R/minute|
|Focal Spot Size||0.3 x 3mm|
|Duty Cycle Radiation Beam||75% per hour|
|Beam Coverage||250 x 250mm @1m|
|Radiographic Sensitivity||Down to 1%|
|AC Power Input||220V 50/60Hz, 3.5Kw|
|Adjustment range of energy||2.0 to 7MeV in 0.1MeV increments|
|DIMENSIONS AND WEIGHT|
|Radiator||760 x 450 x 400mm||125kg|
|PSU||570 x 340 x 270mm||43kg|
|Control Panel||250 x 190 x 120mm||1.7kg|
|Required doses and associated optical density for D7 Agfa Gevaert film type|
|Exposure dose R||Optical density of images rel. units||Calibration conditions|
|1.4||1.5||Cassette loading order: 0.5Pb - film - 1.0mm Pb, inspected piece: Flat steel plate, 80mm thick developer: D19 Kodak. Fixer: Kodak unifix.|
|Required relative doses in comparison with D7 film under similar conditions|
|Dose coefficient relative to D7||2.65||2.8||1.25||0.57||0.53||1.6|
Exposure Chart for steel (focal distance 1m, D7 film, optical density 2.5, charging 1.0 Pb Film 1.0 Pb):
|ADVANTAGES of BETATRON (CYCLOTRON)||DISADVANTAGES of LINAC|
|Light-weight and compact||Heavy and requires very large operating area.|
|Designed for portable (mobile) and
|Only suitable for stationary applications.
NOT designed for portable use.
|Cheaper to manufacture, repair and maintain||Very expensive to manufacture, repair and maintain|
|Higher image resolution due to
a smaller focal spot size
|Lower image resolution due to a larger focal spot size|
|More efficient power conversion||Less efficient power conversion|
A Betatron Portable X-Ray System is a type of Cyclic Particle Accelerator, in some areas of the world, these systems are also referred to as a Cyclotron X-Ray System. Betatron systems include a Torus-shaped vacuum tube which house electrons as they are accelerated around a circular path using alternating current, and then ejected at a specific target once they have achieved the required velocity.
The main difference between the Betatron and Cyclotron systems is that the Cyclotron uses magnetic fields to bend the particles into a circular path and a pulsing electromagnetic field to increase the speed of the particles. The Betatron systems only use magnetic fields to increase the speed of particles.