Re: Photo: Cyclotron Load On C&NW Heavy Duty Flat Car 48053

Daniel A. Mitchell

Probably correct that this load is some part of the base or frame of the machine.

A cyclotron consists mainly of two “D” shaped vacuum chambers surrounded by a big magnet and some RF coils. The two vacuum chambers are arranged flat-face to flat face forming a cylindrical chamber divided into two segments. A beam of electrons circulates inside this chamber, constrained in circular flight by the external magnetic field, and shuttling between the two chambers. The RF alternates the polarity the two “D” chambers, causing the electrons in the rotating beam to be attracted to one, and repelled by the other. Timing the RF polarity-swaps properly causes the electrons to accelerate.

Early cyclotrons were mostly about the size of a garden shed. Later were the size of a house. A big improvement came with the development of superconducting magnets allowing stronger magnetic fields. Modern “atom smashers” are vastly larger, but work mostly the same way, though they are now so big the magnet has to be split into segments and distributed around the ring. The largest in the USA is the “Tevatron” at Fermilab west of Chicago. The world's largest currently is the LHC at CERN in Europe.  Its “ring” is almost 17 miles around, and there are 1232 superconducting magnets to constrain the beam. It’s the largest single machine on Earth.

Dan Mitchell

On Jul 21, 2019, at 3:55 PM, Bob Chaparro via Groups.Io <chiefbobbb@...> wrote:

Photo: Cyclotron Load On C&NW Heavy Duty Flat Car 48053
A 1946 photo:
Photo can be enlarged quite a bit.
Description: Loading the Cyclotron for Shipment.
A cyclotron is a device to accelerate charged atomic and subatomic particles by an alternating electric field. More:
I believe the photo shows some non-operating part of the cyclotron, perhaps a support base.
Bob Chaparro
Hemet, CA

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