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Contact: Dr. Andreas Mooser
Johannes Gutenberg Universitaet Mainz

Double Penning Trap

Caption: Double Penning trap used to measure the magnetic moment of the proton. The double Penning trap is made of gold-plated cylindrical trap electrodes; the individual trap electrodes are isolated from one another using sapphire rings. During measurements the trap is in an ultra-high vacuum. To the right of the image is the outer housing of a detection instrument which allows for the observation of single protons. The entire structure is about 20 centimeters long.

Credit: photo/: Andreas Moser, JGU

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Related news release: Magnetic moment of the proton measured with unprecedented precision

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