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Photos:Fermi Visit

Photos from College of DuPage Physics 2115’s visit to Fermi National Accelerator Laboratory (summer 2011).

 

Photos—Fermilab Visit

(Left) Dr. Daniel Broemmelsiek of the Fermilab Accelerator Division briefing College of DuPage students on the “TEVATRON” accelerator. 

 

The TEVATRON is a superconducting synchrotron, four miles in circumference, which is fed matter and anti-matter from a complex chain of seven other accelerators that stretch over 9 kilometers in length and consume energy at a rate of 30 million watts.

(Above) Radiofrequency quadrupole linac (RFQ): A compact accelerator that uses four specially shaped rods to accelerate and focus beam at the same time.  The small size of an RFQ makes it useful as an injector for hospital based cancer treatment accelerators.  RFQ’s are also used to generate short-lived isotopes for medical diagnostic studies using positron emission tomography (PET).

 

(Above) Safely outside of the Cockcroft-Walton Accelerator chamber: A 750,000 volt DC voltage source.  The maximum voltage is limited by how much the surrounding air can “stand-off”  before sparking.

(Above) At the Fermilab Linac: Radio frequency power makes an electric field, polarized in the same direction in all the gaps.  Particles are accelerated in the gaps and “hide” inside the drift tubes when the electric field reverses.  If a particle rests in the gap when the polarity is reversed it would be decelerated.  As the velocity of the particle increases, the drift tubes (and the gaps between them) become longer.

(Left) Outside of the Tevatron control room where physicists, engineers and technicians of the Fermilab Operations Department monitor and control operation of the complex of eight accelerators, beam transport lines connecting them, target stations and liaison with experiments.

(Above) Outside of the Fermilab NICADD Photoinjector Laboratory (FNPL) at site AØ.  The photoinjector is an 18 million electron-volt linac which produces a high intensity, low emittance beam using a pulsed ultraviolet laser, a normal conducting radiofrequency gun with a cesium telluride photo-cathode, a 9-cell superconducting cavity and a magnetic chicane.   The accelerator is used for studies in accelerator science, plasma wake-field acceleration and channeling radiation.

(Left) Dr. Camille Ginsburg of Fermilab’s Department of Superconductivity & Radio Frequency Development gives College of DuPage students unique access to facilities used for conceptualization through commissioning of components and assemblies, to be used in all aspects of beam acceleration, handling and detection.