Design and prototype test of a high-sensitivity reentrant-cavity based Schottky pickup.
- Resource Type
- Article
- Authors
- Wang, Minwen; Zhuo, Xin; Zhao, Mingtong; Qiu, Mengtong; Chen, Wei; Wang, Zhongming
- Source
- Review of Scientific Instruments. Mar2023, Vol. 34 Issue 3, p1-9. 9p.
- Subject
- *TEST design
*SIGNAL-to-noise ratio
*PROTONS
*RESONANCE
- Language
- ISSN
- 0034-6748
Schottky diagnostics is an important measure for the debunched beam during the injection phase of the Xi'an Proton Application Facility (XiPAF). The existing capacitive Schottky pickup has a relatively low sensitivity and a poor signal-to-noise ratio for the low-intensity beam. A resonant Schottky pickup based on the principle of a reentrant cavity is proposed. The effects of cavity geometric parameters on cavity properties are systematically studied. A prototype was built and tested to validate the simulation results. The prototype has a resonance frequency of 24.23 MHz, a Q value of 635, and a shunt impedance of 19.75 kΩ. The resonant Schottky pickup has the capability to detect as few as 2.3 × 106 protons with an energy of 7 MeV and a momentum spread of about 1% at the injection phase of XiPAF. The sensitivity is two orders of magnitude higher than the existing capacitive pickup. [ABSTRACT FROM AUTHOR]