An accurate low current measurement circuit for heavy iron beam current monitor

Zhou, Chao; Su, Hong; Mao, Ruishi; Dong, Chune; Qian, Yi; Kong, Jie

doi:10.1016/j.nimb.2012.01.033

Cited by 17 publications

(11 citation statements)

References 6 publications

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“…The accurate low current measurement circuit scheme in nowadays consists of a novel technique I/V Converter and a new approach of Gated Integrator which avoid the parasitical influences. The current signal from the detector, is converted into a voltage signal through a I/V Converter, the output of which is integrated by the GI to measure the charge of the beam (Zhou et al, 2012;Kong et al, 2010;Redondo et al, 2007). Outputs of I/V Converter and Gated integrator are acquired by a data acquisition system based on PXI.…”

Section: Low Current Measurement Circuitmentioning

confidence: 99%

“…The problem is resolved by using a transmission gate switch to substitute the two MOS in series for T-switch configuration (Zhou et al, 2012). The transmission gate is composed of a NMOS and a PMOS connected in parallel controlled by complementary signals.…”

Section: Configuration Switch To Prevent Leakage Current and Charge Imentioning

confidence: 99%

“…In the recent years, since 2006 at Institute of Modern Physics, Lanzhou, beams of heavy-charged particles like carbon ions have encouraged the research of measurement structures and these beams have been used to the treatment of inoperable tumors with different detector arrays of silicon strip detectors (Zhou et al, 2012). Beams used to the treatment in many cases always have very low currents less than a pico-ampere.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New Development Design of Low Current Measurement with Noise Reduction for High-Resolution System

Gloire¹,

Evariste²,

Arnaud³

et al. 2018

American Journal of Engineering and Applied Sciences

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Abstract:The treatment of inoperable cancers in the therapy terminal in Lanzhou-China, which is located at the Institute of Modern Physics (IMP), permits to work on the actual front-end readout. The availability of detailed noise spectral density characteristics for the OPA amplifier helps to develop the noise error analysis for high-resolution. This work focused on the noise model of the detector-preamplifier, which presents the low noise circuit schematic of the Transimpedance (TIA). Considering the parasitical influences, we develop a new approach to detect the weak signals based on resonant frequency, 1/√L 1 (C 1 +C GS ). In addition, the system eliminates leakage current in the reset switch and reduces the charge injection occur from the switches in the Gated Integrator (GI) and the configuration switch is made especially with two transmission gates switches, in series, with a grounded MOS switch, attached to the node between the two transmission gates switches and the linearity almost good.

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Section: Low Current Measurement Circuitmentioning

confidence: 99%

Section: Configuration Switch To Prevent Leakage Current and Charge Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New Development Design of Low Current Measurement with Noise Reduction for High-Resolution System

Gloire¹,

Evariste²,

Arnaud³

et al. 2018

American Journal of Engineering and Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Widely used imaging systems such as Si Charge Coupled Device (CCD), Complementary Metal-Oxide field effect transistor Active Pixel Sensor (CMOS APS), Schottky-Barrier Detector (SBD), InGaAs, InSb and HgCdTe FPAs are all based on the concept of current integration to accumulate signal in the purpose of improving the Signal-to-Noise Ratio (SNR), dynamic range and sensitivity. In Cooling Storage Ring (CSR) IMP Lanzhou, the main works are heavy ion beam accumulation, experiments related to cancer therapy, patients' treatment, mass measurement and prophase experiments on recombination (Kong et al, 2010;Zhang and Wu, 2011;Zhou et al, 2012). The main function of the electron cooler in the CSR is the accumulation of heavy ion beams.…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Novel Gated Integrator for the Heavy ion Beam Monitors System

Arnaud¹,

Evariste²,

Bernard³

2017

American Journal of Engineering and Applied Sciences

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Abstract: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.

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“…In CSR IMP Lanzhou, the main works are heavy ion beam accumulation, experiments related to cancer therapy, patients' treatment, mass measurement and prophase experiments on recombination [1,3]. One of the main functions of electron cooler in CSR was heavy ion beam accumulation.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Build a Gated Integrator for HighResolution Energy Spectroscopy Systems

Evariste¹,

Arnaud²,

Bernard³

2017

IOSR JEEE

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An accurate low current measurement circuit for heavy iron beam current monitor

Cited by 17 publications

References 6 publications

New Development Design of Low Current Measurement with Noise Reduction for High-Resolution System

New Development Design of Low Current Measurement with Noise Reduction for High-Resolution System

Design and Simulation of Novel Gated Integrator for the Heavy ion Beam Monitors System

A Novel Approach to Build a Gated Integrator for HighResolution Energy Spectroscopy Systems

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