A radio-frequency (RF) generator arrangement includes a combiner that includes an RF plug socket and an RF generator including a plug that matches the RF plug socket. The RF plug socket includes an opening for receiving the plug, an external contact for connection to an earth connection, an internal contact for connection to an RF signal, and an opening-narrowing device configured to reduce the opening so that the opening assumes a reduced-opening state when the plug is removed. In the reduced-opening state, an opening distance of the opening is reduced compared to a first opening distance, and/or an opening cross section of the opening is reduced compared to a first opening cross section. The opening-narrowing device includes an electrically conductive barrier connected to the external contact and configured to prevent electromagnetic radiation of the RF signal emitted from the internal contact from exiting from the opening in the reduced-opening state.

Some embodiments include a system comprising: an RF source configured to generate an RF signal; an RF frequency control circuit coupled to the RF source and configured to adjust a frequency of the RF signal; an accelerator structure configured to accelerate a particle beam in response to the RF signal; and control logic configured to: receive a plurality of settings over time for the RF source; adjust the RF signal in response to the settings; and adjust a setpoint of the RF frequency control circuit in response to the settings.

Some embodiments include a system comprising: an RF source configured to generate an RF signal; an RF frequency control circuit coupled to the RF source and configured to adjust a frequency of the RF signal; an accelerator structure configured to accelerate a particle beam in response to the RF signal; and control logic configured to: receive a plurality of settings over time for the RF source; adjust the RF signal in response to the settings; and adjust a setpoint of the RF frequency control circuit in response to the settings.

An apparatus may include an exciter, disposed within a resonance chamber, to generate an RF power signal. The apparatus may include a resonator coil, disposed within the resonance chamber, to receive the RF power signal, and generate an RF output signal; and a pickup loop assembly, to receive the RF output signal and output a pickup voltage signal. The pickup loop assembly may include a pickup loop, disposed within the resonance chamber; and a variable attenuator, disposed at least partially between the resonator coil and the pickup loop. The variable attenuator may include a configurable portion, movable from a first position, attenuating a first amount of the RF output signal, to a second position, attenuating a second amount of the RF output signal, different from the first amount.

An apparatus may include a drift tube assembly, the drift tube assembly defining a triple gap configuration, and arranged to accelerate and transmit an ion beam along abeam path. The apparatus may include a resonator, to output an RF signal to the drift tube assembly, and an RF quadrupole triplet, connected to the drift tube assembly, and arranged circumferentially around the beam path.

An apparatus may include a drift tube assembly, the drift tube assembly defining a triple gap configuration, and arranged to accelerate and transmit an ion beam along abeam path. The apparatus may include a resonator, to output an RF signal to the drift tube assembly, and an RF quadrupole triplet, connected to the drift tube assembly, and arranged circumferentially around the beam path.

An exciter for a high frequency resonator. The exciter may include an exciter coil inner portion, extending along an exciter axis, an exciter coil loop, disposed at a distal end of the exciter coil inner portion. The exciter may also include a drive mechanism, including at least a rotation component to rotate the exciter coil loop around the exciter axis.

An exciter for a high frequency resonator. The exciter may include an exciter coil inner portion, extending along an exciter axis, an exciter coil loop, disposed at a distal end of the exciter coil inner portion. The exciter may also include a drive mechanism, including at least a rotation component to rotate the exciter coil loop around the exciter axis.

An object of the present invention is to speed up an operation of extracting an ion beam from an accelerator. An accelerator 100 includes an upper magnetic pole 8 and a lower magnetic pole 9 sandwiching an ion circulation space 10 in which ions circulate. At least one of the upper magnetic pole 8 and the lower magnetic pole 9 is formed such that a magnetic pole interval between the upper magnetic pole 8 and the lower magnetic pole 9 varies when the ion circulation space 10 is viewed along an ion beam trajectory. That is, a wide interval region 11 having a larger magnetic pole interval than a peripheral region is formed in a region closer to a center point of the ion circulation space 10 than a center point of the ion beam trajectory.

An object of the present invention is to speed up an operation of extracting an ion beam from an accelerator. An accelerator 100 includes an upper magnetic pole 8 and a lower magnetic pole 9 sandwiching an ion circulation space 10 in which ions circulate. At least one of the upper magnetic pole 8 and the lower magnetic pole 9 is formed such that a magnetic pole interval between the upper magnetic pole 8 and the lower magnetic pole 9 varies when the ion circulation space 10 is viewed along an ion beam trajectory. That is, a wide interval region 11 having a larger magnetic pole interval than a peripheral region is formed in a region closer to a center point of the ion circulation space 10 than a center point of the ion beam trajectory.