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RD, that's a backscatter image, so the xrays don't need to go through the engine to image it.
I'm fairly sure that x ray scanners don't produce diffraction images because it would need monochromatic Xrays and the image would be horrible convoluted.
Powerful imaging performanceThe VACIS XPL systemís switched-energy X-ray source simultaneously screens vehicles at two different energies, displaying organic threats such as explosives, stowaways and drugs in a different color to help inspectors quickly evaluate the vehicleís contents. The system also provides conventional high-resolution black-and-white X-ray images to help inspectors identify metallic threats such as guns. The system can image passenger cars and light trucks from roof to pavement and bumper to bumper, allowing the entire vehicle to be quickly and efficiently screened.
The most favourable likely thing for your international criminals to have in their package would be uncut diamonds (carbon), and to disguise them by mixing in with a pack of scorched almonds or similar (also mostly carbon & oxygen).[...]Similarly most drugs are not detectable by X-ray machines, but they do have sniffer dogs at airports!
""Two different energies" implies a fairly efficient monochromator, and effectively a pair of monochromatic scans."Or it implies two different acceleration voltages and "optimistic" writing.
As I wrote here http://www.thenakedscientists.com/forum/index.php?topic=42244.msg374914#msg374914, so the same applies in this case.
I have only one thing to say, if there is a genuine, viable means by which to prevent a dog detecting drugs or explosives in a suitcase, it would be irresponsible to put such information into the public domain. So if there is a method and you should stumble upon it, keep it to yourself eh!
Personally, I believe that a well funded terrorist group could develop the technology to smuggle significant weapons onto planes. But, I will choose not to speculate on specific methods in an open forum beyond generalities that are already obvious, or are in use by dope smugglers.
hi all - does anyone know if dense soundproofing material such as ? would block an x-ray or what colour it would show up as on the blue / green / orange spectrum?
I would like to send a bottle of liquid by post but it is forbidden in my country and Xray always catches my parcel.Do you know how I could do ?Put some foil for example ?.
I would like to send a bottle of liquid by post but it is forbidden in my country and Xray always catches my parcel.Do you know how I could do ?
You should be asking yourself a few questions:-- Why is it forbidden to send liquids by post? (safety issues: risk of breakage and spillage; airmail: will the item be transported by air at any stage, or risk of explosion from pressure buildup in a sealed container)