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Charge- and current-sensitive preamplifier and pulse-shape discrimination application
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DOI：10.1007/s41365-026-02001-5.png)
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Abstract
En 中文
In this study, a compact 16-channel integrated charge- and current-sensitive preamplifier, called CCPA, was developed for a large-scale detector array used in nuclear physics experiments. The CCPA was designed to achieve pulse-shape discrimination for silicon detectors. CCPA has a fast response of typically less than $$6 \mathrm {~ns}$$ for the pulse rise time and a low equivalent noise of $$1.5 \mathrm {~keV}$$ at zero input capacitance. The energy dynamic range and pulse decay time can be easily adjusted for different applications by changing feedback capacitance $$C_\text {f}$$ and resistance $$R_\text {f}$$ . A good energy resolution of 26.87 keV was achieved for $$5.486 \mathrm {~MeV}$$ $$\alpha$$ particles from $$^{241}\text {Am}$$ . The pulse-shape discrimination method was applied for the first time in an experiment carried out on the Radioactive Ion Beam Line in Lanzhou (RIBLL1), and CCPA demonstrated high resolution and stability in beam experiments. The experiment identified low-energy $$\alpha$$ particles as low as 5 MeV by the pulse-shape discrimination method, as well as hundreds of MeV charged particles. This provides a new routine for the high-precision measurement of low-energy charged particles emitted by light nuclear reactions.
Keywords:
Exotic nuclear structures
Charge- and current-sensitive preamplifier
Pulse-shape discrimination
Low-energy charged particle
Silicon detector
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