No clue but ok. I uploaded the entire text onto a IPFS, you can see what it is about.
https://ipfs.io/ipfs/QmcQsYYcYuBurGVb3oZPKvJaeABQgLi7PYmUxWRnALSM7B?filename=MultipoleRadiationShielding.html
https://ipfs.io/ipfs/QmcQsYYcYuBurGVb3oZPKvJaeABQgLi7PYmUxWRnALSM7B?filename=MultipoleRadiationShielding.html