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Charged-particle traps require confinement fields in order to provide potential wells. In this contribution we describe two economical solutions for providing electric fields for use with Penning and radio-frequency (rf) traps. The bandwidth of the amplifier should be as wide as possible to permit fast density measurements [6]. Total harmonic distortion should be minimized to allow the amplifier to be used to apply large perturbations such as can be needed for rotating wall frequency stabilization [7]. Our high voltage amplifier design utilizes the Apex PA84A high voltage power operational amplifier, and is based on a circuit designed by Bob Bongard of UCSD. In the full version of the amplifier, analog switches, potentiometers and op amps are used in the front end along with panel mounted controls to provide a great deal of flexibility for pulse generation. It also includes CAD drawings for the amplifier housing, electronic schematic diagram files, PC board design files and some SPICE models. Bode plot of the magnitude of the transfer function relating rf oscillator Anode-1 voltage divided by the component of anode 1 current furnished by the DC power supply. Noise Reduction The harmonic-content power dissipated in the non-ideal resistance of the tank inductor can be reduced by mixing in a sinusoidal signal having one pure frequency.
Tags : radio frequency rf, electronic schematic diagram, high voltage power, rf oscillator, anode 1, dc power supply, voltage amplifier, analog switches, density measurements, amplifier design, power supply noise, total harmonic distortion, operational amplifier, spice models, frequency stabilization
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