Radiation monitoring system

Design of a portable low-power multichannel analyzer with wireless connectivity for remote radiation monitoring, powered from a solar panel with a internal battery to be operated in field. The multichannel analyzer is based on a single microcontroller which performs the digital functions and an analog signal processing board for implementing a Gaussian shaper preamplifier, a Gaussian stretcher, sample and hold, pile-up rejector and a 10 bit ADC. Now this design is to be used with a NaI(Ti) scintillator detector. This multichannel analyzer is designed to be a part of radiation monitoring network. All of them are connected, by radio in a radius of 10 kilometers, to a supervisor computer that collects data from the network of multichannel analyzers and numerically display the latest radiation measurements or graphically display measurements over time for all multichannel analyzers. Like: dose rate, spectra and operational status. Software also supports remotely configuring operating parameters (such as radiation alarm level) for each monitor independently

ATLAS Pixel Radiation Monitoring with HVPP4 System

In this talk we present the basis for the protocol for radiation monitoring of the ATLAS Pixel Sensors. The monitoring is based on a current measurement system, HVPP4. The status on the ATLAS HVPP4 system development is also presented.Comment: Talk given at DPF-2009, Detroit, MI, July 2009; 8 pages, 4 figures, 6 tables; To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C09072

Radiation monitoring with nuclear emulsions on project Gemini. 1. Experimental design and evaluation procedures - Partial results on missions 4 and 5

Radiation monitoring with nuclear emulsions and other radiation sensors on Gemini projec

Radiation monitoring with nuclear emulsions on Project Gemini. II. Results on the 14-day mission Gemini VII

Radiation monitoring results of small nuclear emulsion packs worn by astronauts on Gemini VI

LTV beta-bremsstrahlung spectrometer for Gemini 12 Final report

Design and operation of combination bremsstrahlung spectrometer and data processor for radiation monitoring during Gemini 7 fligh

Nuclear Track Detectors for Environmental Studies and Radiation Monitoring

Several improvements were made for Nuclear Track Detectors (NTDs) used for environmental studies and for particle searches. A new method was used to determine the bulk etch rate of CR39 and Makrofol NTDs. It is based on the simultaneous measurement of the diameter and of the height of etch-pit cones caused by relativistic heavy ions (158 A GeV Pb(82+) and In(49+) ions) and their fragments. The use of alcohol in the etching solution improves the surface quality of NTDs and it raises their thresholds. The detectors were used for the determination of nuclear fragmentation cross sections of Iron and Silicon ions of 1.0 and 0.41 GeV/nucleon. These measurements are important for the determination of doses in hadron therapy and for doses received by astronauts. The detectors were also used in the search of massive particles in the cosmic radiation, for the determination of the mass spectrum of cosmic rays and for the evaluation of Po(210) alpha decay and of natural radon concentrations.Comment: 7 pages, 5 EPS figures. Presented at the 10th Topical Seminar on Innovative Particle and Radiation Detectors, 1-5 October 2006, Siena, Ital

The Practice and Implementation of Radiation Monitoring of Radiographers in Tertiary Hospitals in Southeastern Nigeria: A Reassessment

Background: Radiation monitoring is an essential radiation safety practice that helps to determine the cumulative radiation dose absorbed by radiographers, ensuring that it does not exceed permissible limits. There are national and international regulations mandating employers and employees of radiation workers to carry out radiation monitoring practices. Objective: To reassess the practice and implementation of radiation monitoring of radiographers working in south-eastern tertiary hospitals in Nigeria. Methods: This was a cross-sectional survey involving 102 radiographers from 5 selected South-Eastern tertiary hospitals. Proportional stratified random sampling was used to select the radiographers from each tertiary hospital while a semi-structured questionnaire in line with the specific objectives was used as the method for data collection. Information obtained from the respondents was related to established radiation monitoring requirements. Results: With a perfect response rate from the 102 respondents, personnel radiation monitoring was available to only 31% (n = 32) of the respondents with 59% (n = 19) using Thermoluminescent dosimeters. Even though a majority (71.9%, n=23) wore their dosimeters daily, only half (n = 16) had routine device retrieval and feedback of reading at the appropriate time. Employees did not demand radiation monitoring history from the radiographers before employment and only 10% (n = 3) of those monitored claimed they had dosimetry records. Conclusion: Personnel radiation monitoring practices of radiographers in South-Eastern tertiary hospitals still remain below internationally acceptable standards. Comparing the findings of this study with a similar study carried out 10 years ago, there has been little improvement in the radiation monitoring of radiographers. The management of tertiary health institutions should ensure that personnel monitoring devices are made available to radiographers, and stricter rules should be placed on the daily wearing of dosimeters

Radiation Monitoring with Diamond Sensors for the Belle-II Vertex Detector

The Belle II detector is currently under construction at the SuperKEKB electron-positron high-luminosity collider, that will provide an instantaneous luminosity 40 times higher than that of KEKB. There- fore the Belle-II VerteX Detector (VXD) will operate in a very harsh environment. A radiation monitoring and beam abort system is needed to safely operate the VXD detector in these conditions. This system is based on 20 single crystal CVD diamond sensors placed in 20 key positions in the vicinity of the VXD and interaction region. In this contribution we describe the system design and we present the procedures followed for the characterisation and calibration of the diamond sensors. We discuss also the performance of the prototype system during the first SuperKEKB commissioning phase in February-June 2016