Abstract: A method of controlling a DC power supply to change a DC offset voltage applied to a component for manipulating charged particles. The method includes, whilst an AC voltage waveform is being applied to the component: controlling the DC power supply to produce an initial DC offset voltage that is applied to the component via a link that causes the DC offset voltage at the component to lag behind the DC offset voltage produced by the DC power supply when the DC offset voltage produced by the DC power supply is changed; then controlling the DC power supply to produce an overdrive DC offset voltage that is applied to the component via the link for a predetermined period of time; then controlling the DC power supply to produce a target DC offset voltage that is applied to the component via the link, wherein the target DC offset voltage is between the initial DC offset voltage and the overdrive DC offset voltage.

Abstract: A method of controlling a DC power supply to change a DC offset voltage applied to a component for manipulating charged particles. The method includes, whilst an AC voltage waveform is being applied to the component: controlling the DC power supply to produce an initial DC offset voltage that is applied to the component via a link that causes the DC offset voltage at the component to lag behind the DC offset voltage produced by the DC power supply when the DC offset voltage produced by the DC power supply is changed; then controlling the DC power supply to produce an overdrive DC offset voltage that is applied to the component via the link for a predetermined period of time; then controlling the DC power supply to produce a target DC offset voltage that is applied to the component via the link, wherein the target DC offset voltage is between the initial DC offset voltage and the overdrive DC offset voltage.

Abstract: An earbud headphone set with adjustable behind-the-neck magnetic speaker wire clamps comprising an audio source electrical connector, a length of four-conductor speaker wire, a Y-junction, a first and second length of two-conductor speaker wire, a first and second adjustable magnetic speaker wire clamp, and a first and second loudspeaker. First and second adjustable magnetic speaker wire clamps are each: (i) permanently attached the substantially longer speaker wire, (ii) reversibly slideably attached and reversibly rigidly attached to the substantially longer speaker wire, or (iii) reversibly rigidly attached to the substantially longer speaker wire. Earbud headphone set with adjustable behind-the-neck magnetic speaker wire clamps may further comprise a microphone located on the length of four-conductor speaker wire, the Y-junction, or the first or second length of two-conductor speaker wire.