Figure 1 : Experimental set-up and resonances.

From: Sixfold improved single particle measurement of the magnetic moment of the antiproton

Figure 1

(a) Schematic of the Penning trap set-up used in the BASE experiment. A cloud of antiprotons is stored in the RT, which supplies single particles to the CT and the AT when required. The CT is used for continuous magnetic field measurements. The AT is the trap with the strong superimposed magnetic bottle, which is used to measure the cyclotron frequency and the Larmor frequency. All traps are equipped with radio-frequency excitation electronics and highly sensitive superconducting detection systems. (b) Cyclotron and (c) Larmor resonance curves, both measured in the AT. The error bars in (b,c) represent the standard deviations of the individual measurements.