PXB7.5M
JME Ltd,Electron House, Old Nelson Street, Lowestoft, Suffolk, England, NR32 1EQ. Tel: +44 (1502) 500969 email:sales@jme.co.uk
The PXB7.5M portable X-Ray Betatron is designed to produce high energy ionising radiation for industrial radiographic non-destructive testing.
The PXB7.5M contains no moving parts (excluding cooling fan) and no circulating liquids, radiation outside the main beam are low, so safe working distances are moderate. After demarcation of dose rate boundaries, the betatron may be used at external sites or in fabrication workshops with little or no additional screening.
The PXB7.5M produces radiographs of very high contrast, sensitivity and resolution. HLV STEEL: 32mm
The PXB7.5M is recommended for radiographic testing of weld joints and castings with a steel thickness of 50 to 360mm, concrete and other materials from 200 to 1200mm.
The irradiation field equals 250mm x 250mm @ 1M focal distance. In operation the PXB7.5M has no need for compensating filters that improves the uniformity of the radiation field.
The PXB7.5M is far less costly than other NDT accelerators such as 'Linacs'.
The PXB7.5M replaces cobalt isotope gamma sources which may not give acceptable quality and require costly periodic replenishment.
Applications:
Large forgings, castings, valves, beams, ships hulls, pressure vessels, engine blocks, billets, thick welds, composites, military hardware, munitions, propellants, reinforced concrete buildings and bridges and much more.
| X-Ray output energy selector | 2 to 7.5MeV |
| Dose rate @ 1m (air) | > 5R per minute |
| Focal spot size | 0.3 x 3.0 mm |
| Duty cycle at 20 deg C (per hour) | 75% |
| Radiation beam spread angle | 22 degrees |
| Radiographic sensitivity | Typically 1% |
| AC power input | 3 Phase, Delta wired 50/60Hz (UK 400V Phase to Phase) |
| Dimensions and weight mm/kgs | |
| Accelerator / Radiator | 700x430x350 100kg |
| PSU | 560x480x380 70kg |
| Control panel | 130x200x30 0.5kg |
Required doses & 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. |
| 2.25 | 2.0 | |
| 2.8 | 2.5 | |
| 3.5 | 3.0 |
Required relative doses in comparison with D7 film under similar conditions:
| Film type | D4 | MX5 | AX | CX | PT-1 | PT-4M |
| Dose coefficient relative to D7 | 2.65 | 2.8 | 1.25 | 0.57 | 0.53 | 1.6 |
Dose rate distribution in the horizontal plane.
| Degrees | 0 | 22.5 | 45 | 67.5 | 90 | 112.5 | 135 | 157.5 |
| Dose rate % | 100 | 23 | 6.7 | 6.3 | 2.9 | 2.5 | 3.5 | 4.5 |
| Degrees | 180 | 202.5 | 225 | 247.5 | 270 | 292.5 | 315 | 337.5 |
| Dose rate % | 4.3 | 3.3 | 3.5 | 5.5 | 4 | 5 | 10.5 | 17 |
Dose rate distribution in the vertical plane.
| Degrees | 0 | 22.5 | 45 | 67.5 | 90 | 112.5 | 135 | 157.5 |
| Dose rate | 100 | 15 | 5.6 | 2.4 | 2 | 1 | 1 | 1.8 |
| Degrees | 180 | 202.5 | 225 | 247.5 | 270 | 292.5 | 315 | 337.5 |
| Dose rate | 4.3 | 1.8 | 1 | 1 | 2 | 2.4 | 5.6 | 15 |
