Speaker
Description
Non-destructive measurement of low-intensity charged particle beams poses significant challenges in beam diagnostics. At the Heavy Ion Accelerator Facility in Lanzhou (HIRFL), beams with currents below 1 μA are frequently used in experiments, which fall below the detection threshold of standard beam current transformers. To address this, a low-intensity monitoring system was developed, utilizing a sensitive capacitive pick-up (PU) and low-noise electronics. This system measures beam currents by digitally analyzing PU signal amplitudes using a homodyne detection scheme. Laboratory tests showed an amplitude nonlinearity of <0.5% within the operational range of 1 nA–45 μA and an amplitude resolution of 0.94 nA. Currently, four such systems are installed at HIRFL for monitoring low beam currents below 1 μA. Following absolute calibration with a Faraday cup, the system achieves accurate beam intensity measurements with a resolution of approximately 1 nA.
| Region represented | Asia |
|---|---|
| Paper preparation format | Word |
