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As described previously, the beam is at least two meters in diameter, and the smallest skin exposure is enough to cause intolerable pain. A red hot poker does not need to be in touch with much skin to make you pull away, and the ADS causes as much pain on your nerve endings. A shield will not work unless it covers your whole body and them some, because the ADS beam diffracts. According to an article in Aviation Week & Space Technology last July -
…actual tests show that the beams penetrate even minute openings or cracks, for example, and sometimes appear almost to wrap around corners to affect fingers and feet of those trying to hide behind or hold up protective devices.
"The radio frequency is hard to block," Booen says. "Some of the people tested against tried to hide by laying down behind some concrete traffic barriers and the beam went underneath [where there was uneven contact with the ground]."
What about that tinfoil? It will have to cover every square inch and any rips or tears will make it useless. Joints may be tricky; if you flex foil too many times holes start appearing. For vision you will need a metal mesh visor, like the kind they use on microwave oven doors. The problem is, the size of the mesh depends on the wavelength of the radiation - so short-wavelength ADS beam requires something much finer than normal microwave mesh. You also need to think about the effect on your breathing, body temperature and communication...
The Pulsed Energy Projectile (PEP)... is a non-lethal weapon which fires an extremely short laser pulse, producing a plasma flash-bang at the target. This could be deployed on the same platform as the ADS, using the same power source. “Many of the countermeasures that can be envisioned against the ADS” could be nullified by the PEP by “ablation of the defence” according to a Navy study [.pdf] on the effects of plasmas. Such a laser could chew through a layer of foil with a few pulses.
A PEP might also negate foil without having to blast it away. Ultra-short pulses have recently been demonstrated that can turn metals pitch black , so that the surface absorbs incoming radiation and reflective foil is made useless. This technology was developed at Rochester's High Intensity Femtosecond Laser Laboratory ; they are funded by (among others) DARPA and the Air Force Office of Scientific Research...
"There is only one thing for it then--to learn. Learn why the world wags and what wags it. That is the only thing which the mind can never exhaust, never alienate, never be tortured by, never fear or distrust, and never dream of regretting..."
-T.H. White, The Once and Future King
No Hell below us,
above us only sky...
-John Lennon, Imagine