title: A new method to calculate the beam charge for an integrating current transformer.
abstract: The integrating current transformer (ICT) is a magnetic sensor widely used to precisely measure the charge of an ultra-short-pulse charged particle beam generated by traditional accelerators and new laser-plasma particle accelerators. In this paper, we present a new method to calculate the beam charge in an ICT based on circuit analysis. The output transfer function shows an invariable signal profile for an ultra-short electron bunch, so the function can be used to evaluate the signal quality and calculate the beam charge through signal fitting. We obtain a set of parameters in the output function from a standard signal generated by an ultra-short electron bunch (about 1 ps in duration) at a radio frequency linear electron accelerator at Tsinghua University. These parameters can be used to obtain the beam charge by signal fitting with excellent accuracy.
authors.affiliation: Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, CAEP, Mianyang, Sichuan 621900, China.
authors.forename: Yuchi
authors.initials: Y
authors.lastname: Wu
authors.forename: Dan
authors.initials: D
authors.lastname: Han
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu
authors.forename: Kegong
authors.initials: K
authors.lastname: Dong
authors.forename: Fang
authors.initials: F
authors.lastname: Tan
authors.forename: Yuqiu
authors.initials: Y
authors.lastname: Gu