4 results about "Shunt impedance" patented technology

The application belongs to the technical field of strong current ion synchrotron, and relates to an accelerator slow extraction radio frequency excitation device, which comprises a digital programmable signal source, a microwave bridge, a power amplifier, an exciter and a high-power attenuator, the output end of the digital programmable signal source is connected with the input end of the microwave bridge, the output end of the microwave bridge is connected with the input end of the power amplifier, the output end of the power amplifier is connected with the input end of the exciter, the exciter is used for feeding radio frequency power to the pole plate of the exciter, the output end of the exciter is connected with the input end of the high-power attenuator, and the output end of the high-power attenuator is connected with the input end of the digital programmable signal source. The device has the functions of monitoring the output power of the power amplifier and whether the excitation pole plate works normally in real time, can realize high efficiency of slow extraction excitation (high transverse shunt impedance), and takes into account the working bandwidth.

The application discloses a transverse feedback excitation device with high shunt impedance and horizontal light extraction, and belongs to the technical field of particle accelerators. The device comprises a beam position probe (BPM), an RF front end, an ADC module, a digital signal processing module, a DAC module, a power divider, a power amplifier, a low-pass filter, an exciter (Kicker) and a matching load. The exciter Kicker has four electrode strips located on both sides of the beam center line and parallel to each other, two electrode strips on the same side are connected in parallel, the characteristic impedance of a single electrode strip is 100Ω, and the equivalent total characteristic impedance after parallel connection is 50Ω; the four electrode strips are distributed in a quadrangular symmetry in the cross section of the vacuum chamber and avoid the horizontal median plane, so as to form an open light path channel. The application improves the shunt impedance of the exciter, reduces the radio frequency power demand, realizes impedance matching with a standard 50Ω system, and guarantees the horizontal unobstructed extraction of the synchrotron radiation light.

This invention discloses a transverse feedback excitation device with high shunt impedance and horizontal light extraction, belonging to the field of particle accelerator technology. The device includes a beam position detector (BPM), an RF front-end, an ADC module, a digital signal processing module, a DAC module, a power divider, a power amplifier, a low-pass filter, an exciter (Kicker), and matching loads. The exciter (Kicker) has four parallel electrode strips located on both sides of the beam centerline, with two strips on the same side connected in parallel. Each electrode has a characteristic impedance of 100Ω, resulting in an equivalent total characteristic impedance of 50Ω after parallel connection. The four electrode strips are symmetrically distributed at the four corners within the vacuum chamber cross-section, avoiding the horizontal midplane to form an open optical path. This invention improves the shunt impedance of the exciter, reduces the RF power requirement, achieves impedance matching with a standard 50Ω system, and ensures unobstructed horizontal extraction of synchrotron radiation light.

The present invention relates to a single-photon detector (2000) comprising a low temperature region (LT) and a high temperature region (HT), wherein a temperature in the low temperature region (LT) is lower than a temperature in the high temperature region (HT), a superconducting nanowire (1100), a shunt impedance (2400) connected in parallel with the superconducting nanowire (1100), wherein the superconducting nanowire (1100) and the shunt impedance (2400) are both included in the low temperature region (LT). The invention further relates to a method (3000) for operating the single- photon detector (2000) so as to reduce measurement jitter.