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Title: Unattended Dual Current Monitor

Abstract

The Unattended Dual Current Monitor (UDCM) is an ideal solution for current measurement needs such as ion chamber gamma measurements. The UDCM has two independent inputs and each input detects currents in two user selectable ranges, -0.2nA to -20nA or -20nA to -2uA. Measurement results can be retrieved via an Ethernet connection or by monitoring the TTL output pulses with a simple counter. Measurement data is also stored on a user accessible micro-SD card and automatically downloaded to a USB flash drive. A programmable negative High Voltage (HV) power supply provides detector bias voltages from 0 to -1,000V. The UDCM is fully compatible with the IAEA Multi Instrument Collect (MIC) software and responds to the existing MiniGRAND commands. The Ethernet port provides an IAEA RAINSTORM compliant data transfer and data security interface. The UDCM produces TTL pulses at a rate proportional to the input current, 100cps/nA. The UDCM can simplify instrumentation needs by enabling the use of a simple pulse counter for both neutron and gamma measurements. The UDCM is a simple instrument, inexpensive to manufacturer and designed for reliability.

Authors:
 [1];  [1];  [1]
  1. LANL
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1337950
Report Number(s):
UDCM; 005091MLTPL00
C16096
DOE Contract Number:
AC52-06NA25396
Resource Type:
Software
Software Revision:
00
Software Package Number:
005091
Software CPU:
MLTPL
Source Code Available:
Yes
Country of Publication:
United States

Citation Formats

Newell, Matthew R., Parker, Robert F., and Jones, David C.. Unattended Dual Current Monitor. Computer software. Vers. 00. USDOE. 11 Aug. 2016. Web.
Newell, Matthew R., Parker, Robert F., & Jones, David C.. (2016, August 11). Unattended Dual Current Monitor (Version 00) [Computer software].
Newell, Matthew R., Parker, Robert F., and Jones, David C.. Unattended Dual Current Monitor. Computer software. Version 00. August 11, 2016.
@misc{osti_1337950,
title = {Unattended Dual Current Monitor, Version 00},
author = {Newell, Matthew R. and Parker, Robert F. and Jones, David C.},
abstractNote = {The Unattended Dual Current Monitor (UDCM) is an ideal solution for current measurement needs such as ion chamber gamma measurements. The UDCM has two independent inputs and each input detects currents in two user selectable ranges, -0.2nA to -20nA or -20nA to -2uA. Measurement results can be retrieved via an Ethernet connection or by monitoring the TTL output pulses with a simple counter. Measurement data is also stored on a user accessible micro-SD card and automatically downloaded to a USB flash drive. A programmable negative High Voltage (HV) power supply provides detector bias voltages from 0 to -1,000V. The UDCM is fully compatible with the IAEA Multi Instrument Collect (MIC) software and responds to the existing MiniGRAND commands. The Ethernet port provides an IAEA RAINSTORM compliant data transfer and data security interface. The UDCM produces TTL pulses at a rate proportional to the input current, 100cps/nA. The UDCM can simplify instrumentation needs by enabling the use of a simple pulse counter for both neutron and gamma measurements. The UDCM is a simple instrument, inexpensive to manufacturer and designed for reliability.},
doi = {},
year = 2016,
month = 8,
note =
}

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  • The UDCM is a low-current measurement device designed to record sub-nano-amp to micro-amp currents from radiation detectors. The UDCM is a two-channel device that incorporates a Commercial-Off-The-Shelf (COTS) processor enabling both serial over USB as well as Ethernet communications. The instrument includes microSD and USB flash memory for data storage as well as a programmable High Voltage (HV) power supply for detector bias. The UDCM is packaged in the same enclosure, employs the same processor and has a similar user interface as the UMSR. A serial over USB communication line to the UDCM allows the use of existing versions ofmore » MIC software, while the Ethernet port is compatible with the new IAEA RAINSTORM communication protocol.« less
  • The UDCM is a low current measurement device designed to record pico-amp to micro-amp currents from radiation detectors. The UDCM is the planned replacement for the IAEA’s obsolete MiniGRAND data acquisition module. Preliminary testing of the UDCM at the IAEA facilities lead to the following recommendations from the IAEA: Increase the measurement range. Lower range by a factor of 5 and upper range by 2 orders of magnitude; Modifications to the web interface; Increase programmable acquisition time to 3600s; Develop a method to handle current offsets and negative current; Error checking when writing data to the uSD card; and Writingmore » BID files along with the currently stored BI0 files.« less
  • The Unattended and Remote Monitoring (UNARM) system is a collection of specialized hardware and software used by the International Atomic Energy Agency (IAEA) to institute nuclear safeguards at many nuclear facilities around the world. The hardware consists of detectors, instruments, and networked computers for acquiring various forms of data, including but not limited to radiation data, global position coordinates, camera images, isotopic data, and operator declarations. The software provides two primary functions: the secure and reliable collection of this data from the instruments and the ability to perform an integrated review and analysis of the disparate data sources. Several yearsmore » ago the team responsible for maintaining the software portion of the UNARM system began the process of formalizing its operations. These formal operations include a configuration management system, a change control board, an issue tracking system, and extensive formal testing, for both functionality and reliability. Functionality is tested with formal test cases chosen to fully represent the data types and methods of analysis that will be commonly encountered. Reliability is tested with iterative, concurrent testing where up to five analyses are executed simultaneously for thousands of cycles. Iterative concurrent testing helps ensure that there are no resource conflicts or leaks when multiple system components are in use simultaneously. The goal of this work is to provide a high quality, reliable product, commensurate with the criticality of the application. Testing results will be presented that demonstrate that this goal has been achieved and the impact of the introduction of a formal software engineering framework to the UNARM product will be presented.« less
  • The authors are developing isotopic analysis software in the Safeguards Technology Program that advances usability in two complimentary directions. The first direction is towards Graphical User Interfaces (GUIs) for very easy to use applications. The second is toward a minimal user interface, but with additional features for unattended or fully automatic applications. They are developing a GUI-based spectral viewing engine that is currently running in the MS-Windows environment. They intend to use this core application to provide the common user interface for data analysis, and subsequently data acquisition and instrument control applications. The authors are also investigating sets of casesmore » where the MGA [a gamma-ray spectrum analysis code for determining plutonium isotopic abundances] methodology produces reduced accuracy results, incorrect errors, or incorrect results. They try to determine the root cause for the problem and extend the methodology or replace portions of the methodology so that MGA will function over a wider domain of analysis without requiring intervention and analysis by a spectroscopist. This effort is necessary for applications where such intervention is inconvenient or impractical.« less

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