Action at a Distance - Physics of Angels & Demons

I would need to re-watch the opening LHC scene to get a better sense for the scientific accuracy, but it was pretty cool, regardless. Just a couple of things I need to note:

-There was the line in there about the LHC not being meant for antimatter production. That struck me as false at first; after all, most cyclotrons (like Fermilab's Tevatron) work by colliding protons with antiprotons (antiprotons = antimatter). But then I remembered that the LHC is unique in that it's a proton-proton beam, so that's actually probably correct.
-Actually, the big deal in the movie wasn't the production of antimatter, but the production of LARGE AMOUNTS of antimatter. Wikipedia says the LHC can produce 10,000,000 anti-protons each second (that's 1.67x10^-19 kg--a VERY SMALL amount, whereas they were producing actual visible amounts of antimatter (see below).
-The physics-lady at one point says the canister had the explosive yield of a 5 kilotons of TNT. One kt of TNT = 4.184x10^12 J. Assuming 100% efficiency in turning matter into energy, we can solve E=mc^2 for m to get: there was ~233 mg of antimatter in that canister. At current rates of production, it would take the LHC 44 MILLION years to produce enough antiprotons for just ONE of those canisters.


-The explosion: forgetting the whole fireball / implosion / blinding flash of light thing, assuming proton-antiproton collisions,  you wouldn't get the same fiery spectrum you'd get in your usual bomb--all the energy released would be in the form of 938 MeV photons (1.3 fm or 1 millionth-of-a-nanometer wavelength light). That's high, high, HIGH energy gamma rays and, as such, I would imagine that, if you were close enough to get hit by the concussive shockwave, you should have been close enough to be SEVERELY, probably FATALLY irradiated by those beams. Lemme see if I can work out the calculation:
-From XCOM, the 938 MeV photon cross section of water (of which we mostly are) is 0.0202 cm^2/g. Water has a density of 1 g/cm^3, so that gives a linear absorbtion coefficient of 0.0202 cm^-1. Assume the helicopter got up to 10,000 ft (a pretty generous assumption). Then the surface energy density at ground-level would be 179 kJ/m^2. Assume the person is standing up (not lying down) so has a height of 2 meters and a "cross section" of 0.05 m^2. Then, of the 8.95 kJ incident on each person, 98% (8.8 kJ) will be absorbed. Assuming a weight of 100 kg, that's a radiation dose of 88 Grays. That's an instantly fatal dose, looks like. Nice job, Dan Brown. You just killed EVERYONE.

Oh, and by the way, I GOT ENGAGED!!!!!