Colliding Worlds: Standing inside a
Rube-Goldberg-like particle accelerator at CERN, physicist Michael Doser
explaisn to journalists how his team hopes to employe antimatter to
destroy cancer cells. Located in Geneva, CERN is world famous center for
In a big pit at CERN, the European Institute for Nuclear Research in Geneva, a particle accelerator churns out antimatter that has the potential to treat cancer. A California company, PBar Labs, is sponsoring experiments to determine if antimatter can zap tumors in hamster cells. If this therapy works, plans are to treat human cancers. Unlike conventional radiotherapy, antimatter can be precisely calibrated to destroy only cancer cells. And as antimatter doesn't travel far in air, patients wouldn't need much shielding. The accelerator's proton source is a heavy target like tungsten. In the accelerator, these protons collide. Each million-proton collision generates one proton-antiproton pair. Physicists separate the antiprotons from the rest of the soup and slow them down in an antiproton decelerator shaped like a 100m-diameter doughnut swathed in foil and duct tape. The antimatter particles annihilate when they encounter matter, thus they can only be stored suspended in a vacuum. Antiprotons can be precisely targeted so that only in the last millimeter of their path (i.e., in the tumor) they slow down, interact with an atom and are annihilated. "The body is basically empty space," says Michael Doser, a physicist on the project who looks as if he were sent straight over from Hollywood casting. "All matter is illusion. To an antiproton, the body is just an array of atoms. Atoms consist of a tiny nucleus surrounded by a huge cloud of electrons. Antiprotons interact only with the nucleus. If you randomly kick a football through a field that only contains one other football, it is unlikely to hit anything, Doser explains.
The Beam Store from Suitable Technologies is managed by remote workers from places as diverse as New York and Sydney, Australia. Employees attend to store visitors through Beam Smart Presence Systems (SPSs) from the company. The systems combine mobility and video conferencing and allow people to communicate directly from a remote location via a screen as well as move around as if they are actually in the room.
An MIT research team has invented what they see as a solution to the need for biodegradable 3D-printable materials made from something besides petroleum-based sources: a water-based robotic additive extrusion method that makes objects from biodegradable hydrogel composites.
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