• Title/Summary/Keyword: Single-channel analyzer

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Design of an integrated multiple-single-channel analyzer

  • Jie Yang;Xiaofei Gu;Shuxiang Lu;Guoheng Zheng
    • Nuclear Engineering and Technology
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    • v.56 no.7
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    • pp.2557-2562
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    • 2024
  • A type of integrated multiple-single-channel analyzer (IMSCA) is described. The IMSCA works with an input pulse of 2-20 pC, and it can be directly connected to a scintillation detector, which eliminates the need for a linear amplifier. It consists of 64 input ports, so 1-64 detectors can be set by users according to different requirements. Two energy regions for each input channel can be simultaneously analyzed. Another advantage of the IMSCA is that it integrates with a high-speed pulse signal acquisition card and transmits data to the computer through the network. The maximum pulse through-rate is 1.4 MHz, and linearity can reach 0.1%. This IMSCA has been successfully used in enrichment detecting of nuclear fuel rod.

A Study on Implementation of a 64 Channel Signal Generator / Analyzer Module (64채널 신호발생/분석 모듈 구현에 관한 연구)

  • 민경일;정갑천;최종현;박성모
    • Proceedings of the IEEK Conference
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    • 2003.07c
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    • pp.2609-2612
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    • 2003
  • This paper describes a 64 channel signal generator/analyzer module that is useful for verification and testing of digital circuits. It can perform logic analyzer function and signal generator function at the same time. The 64 Channel module is implemented with single FPGA chip for miniaturization, and an USB interface is used to increase portability of the module. Multiple modules can be used in parallel for the verification of large scale circuits. Moreover, since the module is implemented as a PC based system, one can configure convenient GUI(Graphic User Interface) environment.

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Implementation of IEEE 802.15.4 Channel Analyzer for Evaluating WiFi Interference (WiFi의 간섭을 평가하기 위한 IEEE 802.15.4 채널분석기의 구현)

  • Song, Myong-Lyol;Jin, Hyun-Joon
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.63 no.2
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    • pp.81-88
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    • 2014
  • In this paper, an implementation of concurrent backoff delay process on a single chip with IEEE 802.15.4 hardware and 8051 processor core that can be used for analyzing the interference on IEEE 802.15.4 channels due to WiFi traffics is studied. The backoff delay process of IEEE 802.15.4 CSMA-CA algorithm is explained. The characteristics of random number generator, timer, and CCA register included in the single chip are described with their control procedure in order to implement the process. A concurrent backoff delay process to evaluate multiple IEEE 802.15.4 channels is proposed, and a method to service the associated tasks at sequentially ordered backoff delay events occurring on the channels is explained. For the implementation of the concurrent backoff delay process on a single chip IEEE 802.15.4 hardware, the elements for the single channel backoff delay process and their control procedure are used to be extended to multiple channels with little modification. The medium access delay on each channel, which is available after execution of the concurrent backoff delay process, is displayed on the LCD of an IEEE 802.15.4 channel analyzer. The experimental results show that we can easily identify the interference on IEEE 802.15.4 channels caused by WiFi traffics in comparison with the way displaying measured channel powers.

Development of Measurement System for Industrial Transportable Gamma Ray CT (이동 형 산업용 단층측정 장치를 위한 감마선 검출시스템 개발)

  • Kim, Jong-Bum;Jung, Sung-Hee;Moon, Jin-Ho
    • Journal of Radiation Industry
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    • v.6 no.3
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    • pp.231-237
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    • 2012
  • This paper introduces a gamma-ray measurement system for a transportable tomography which is applicable for an industrial process diagnosis. The gamma-ray measurement system consists of pulse mode operating 72 channel CsI detectors, main AMP-pulse shaper, single channel analyzer, counter and control PC. The CsI crystal is coupled with a PIN diode which is connected to an amplifier and pulse shaper. For a compact design, the amplifier and pulse shaping circuit are included in a single package. 36 sets of CsI detectors are connected to a multi-channel counter through single channel analyzers. A computer controls and collects data from two multi-channel counters. This configuration results in 72 channel counting system in total. The CT rotator and radiation measurement system are controlled by a PC with LabVIEW program. Tomographic data were measured for a phantom by the measurement system and transportable gamma-ray CT. From the experimental data image reconstructions were performed by ML-EM algorithm. The result showed that the CsI detector system can be a suitable component for transportable gamma-ray CT system.

Programming characteristics of single-poly EEPROM (Single-poly EEPROM 의 프로그램 특성)

  • 한재천;나기열;이성철;김영석
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.33A no.2
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    • pp.131-139
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    • 1996
  • Inthis apper wa analyzed the channel-hot-electron programming characteristics of the single-poly EEPROM with different control gate and drain structures. The single-poly EEPROM uses the p$^{+}$/n$^{+}$-diffusion in the n-well as a control gate instead of the second poly-silicon. The program and erase characteristics of the single-poly EEPROM were verified using the two-dimensional device simulator, MEDICI. The single-poly EEPROM was fabricated using 0.8$\mu$m ASIC CMOS process, and its CHE programming characteristics were measured using HP4155 parameteric analyzer and HP8110 pulse gnerator. Especially we investigated the CHE programming characteristics of the single-poly EEPROM with the p$^{+}$-diffusion or n$^{+}$-diffusion in the n-well as a control gate and the LDD or single-drain structure. The single-poly EEPROM with p$^{+}$-diffusion in the n-well as a control gate and single-drain structure was programmed to about VT$\thickapprox$5V with VDS=6V, VCG=12V(1ms pulse width).th).

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A study of an environmental radiation monitoring system(ERMS) using digital single channel analyzer(SCA) and dose conversion unit(DCU) (디지털 SCA와 DCU를 이용한 환경방사선 감시기에 관한 연구)

  • 오길환;우희곤;이쾌희;하달규
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.1372-1375
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    • 1996
  • In this paper, we developed and ERMS, which monitors radiation continuously in the vicinity of the nuclear power plant not only to intend health and security of the adjacent residents but also to prevent environmental pollution. Especially, applying digital DCU and SCA which are easy to control and accurate, we obtained good results.

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Design of Microprocessor Controlled Spectrum Analyzer (마이크로 프로세서 제어에 의한 스펙트럼 분석 장치의 설계)

  • 김재형;사공석진;차균현
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.12 no.3
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    • pp.224-238
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    • 1987
  • In the proposed spectrum analyzer, open-loop VCO is replaced with PLL synthesizer incorporating digital frequency synthesizer using modulofunction for measuring precise frequencys. Three different frequency bands and channel spacings are realized by single loop synthesizer through the effective design of the system. The newly designed system with square detection has a good linearity of input range from 10mV to 8.5V, as a result the input sensitivity has been improved up to 500uV. The storage function enables us to analyze not only periodic but also nonperiodic wave-form and zoom-in function expands frequency resolution eight times for the dense spectra.

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Automatic Analysis of Gamma Ray Spectra for Surveillance of the Nuclear Fuel Integrity (핵연료 건전성 점검을 위한 감마선 스펙트럼의 자동 분석)

  • Cho, Joo-Hyun;Yu, Sung-Sik;Kim, Seong-Rae;Hah, Yung-Joon
    • Nuclear Engineering and Technology
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    • v.26 no.4
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    • pp.555-561
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    • 1994
  • The program of performing a fast and automatic analysis of gamma ray spectra obtained by a Multi-Channel Analyzer (MCA) is developed for the surveillance of the nuclear fuel integrity. The integrity of the nuclear fuel is confirmed by the measurement of the radiation level of the reactor coolant through the real time monitoring and the periodic sampling analysis. In Yonggwang nuclear power plane 3 and 4, the Process Radiation Monitoring System (PRMS), which is a real time monitoring system, provides a measure of the fuel integrity. Currently, its spectrometer channel can identify only one radionuclide at a time since the signal processing unit of the spectrometer channel is a Single Channel Analyzer (SCA). To improve the PRMS, it is necessary to substitute the MCA for the SCA The program is operated in a real time mode and an on-demand mode, and automatically performed for all procedures. The test results by using the National Bureau of Standards (NBS) mixed standard source are in good agreement with those from Canberra System 100 which is a commercial MCA Consequently, the developed program seems to be employed for automatic monitoring of gamma rays in nuclear power plants.

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DESIGN AND APPLICATION OF A SINGLE-BEAM GAMMA DENSITOMETER FOR VOID FRACTION MEASUREMENT IN A SMALL DIAMETER STAINLESS STEEL PIPE IN A CRITICAL FLOW CONDITION

  • Park, Hyun-Sik;Chung, Chang-Hwan
    • Nuclear Engineering and Technology
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    • v.39 no.4
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    • pp.349-358
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    • 2007
  • A single-beam gamma densitometer is utilized to measure the average void fraction in a small diameter stainless steel pipe under critical flow conditions. A typical design of a single-beam gamma densitometer is composed of a sealed gammaray source, a collimator, a scintillation detector, and a data acquisition system that includes an amplifier and a single channel analyzer. It is operated in the count mode and can be calibrated with a test pipe and various types of phantoms made of polyethylene. A good average void fraction is obtained for a small diameter pipe with various flow regimes of the core, annular, stratified, and bubbly flows. Several factors influencing the performance of the gamma densitometer are examined, including the distance between the source and the detector, the measuring time, and the ambient temperature. The void fraction is measured during an adiabatic downward two-phase critical flow in a vertical pipe. The test pipe has an inner diameter of 10.9 mm and a thickness of 3.2 mm. The average void fraction was reasonably measured for a two-phase critical flow in the presence of nitrogen gas.

An Analysis of Characteristics of Underground Power line Communication Channel (지중 전력선 통신채널의 특성 해석)

  • Eom, Ki-Hwan;Shin, Jai-Ho;Lee, Seung-Joon
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.48 no.5
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    • pp.40-45
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    • 2011
  • In this paper, to develop a broadband power line communication modem and network technologies, we analysis the characteristics of underground power line communication channel through actual tests. To measure the amount of attenuation by length and structure of broadband power line communication channel, we configure a measurement system of the channel with signal generator, spectrum analyzer and non-contacted coupler. For actual tests, we choose two of the longest lines among medium-voltage lines as a single line in the test lines and measure the characteristics of noise and signal attenuation level of the channel. The experimental results show that the channel has a impulse noise which can remarkably reduce communication capability. In the case of long lines, high-frequency attenuation appeared by length of the lines.