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Design and Simulation of Novel Gated Integrator for the Heavy ion Beam Monitors System
摘要： In this study, the objective is to realize a Gated Integrator (GI) circuit for silicon strip, Si(Li), CdZnTe and CsI detectors etc. With the development of radioactive ion beam physics, heavy-charged particles like carbon ions have been applied to the treatment of deep-seated inoperable tumors in the therapy terminal of the Heavy ion Research Facility in Lanzhou (HIRFL) located at the Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS). A high resolution current measurement circuit was developed to monitor the beam current at 1pA range. The circuit consisted of a low current high sensitivity I/V converter and gated integrator in an energy spectroscopy. A low offset voltage precision amplifier and new guarding and shielding techniques were used in the I/V converter circuit which allowed to measure low current. This paper will show a MOS switch configuration which is used to prevent leakage current and novel technique to compensate a charge injection in the reset switch.
关键词： Noise,Gated Integrator,Energy Spectroscopy,Leakage Current Prevention,Charge Injection
更新于2025-09-23 15:23:52
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[IEEE 2018 31st International Vacuum Nanoelectronics Conference (IVNC) - Kyoto, Japan (2018.7.9-2018.7.13)] 2018 31st International Vacuum Nanoelectronics Conference (IVNC) - Evidence for single-electron tunneling in electron energy spectra of diamond tip field emitter
摘要： Field emission from microscale diamond tips was studied using electron energy spectroscopy. A processing at high emission currents was applied to modify the atomic surface structure of pristine diamond tips. Subsequently, staircase-like current-voltage characteristics were obtained which are typical for the single-electron tunneling occurring due to the Coulomb blockade effect in emitting carbon nanostructures formed on the surface of the diamond tips. Characteristic electron energy spectra consisted of several peaks, each corresponding to a certain charging state of the emitting nanostructure. The measured spectra were used to determine the parameters of the Coulomb blockade (e.g. charging energy) and reveal peculiar features of single-electron effects in field emission systems.
关键词： electron energy spectroscopy,Coulomb blockade,single-electron tunneling,field emission
更新于2025-09-23 15:21:21