The electronic personal dosimeter (EPD) is a modern electronic dosimeter for estimating uptake of ionising radiationdose of the individual wearing it for radiation protection purposes. The electronic personal dosimeter has the advantages over older types that it has a number of sophisticated functions, such as continuous monitoring which allows alarm warnings at preset levels and live readout of dose accumulated. It can be reset to zero after use, and most models allow near field electronic communications for automatic reading and resetting.
View of readout on an electronic personal dosimeter. The clip is used to attach it to the wearer's clothing.Four EPDs in chronological order
They are typically worn on the outside of clothing, such as on the chest or torso to represent dose to the whole body. This location monitors exposure of most vital organs and represents the bulk of body mass.
These are especially useful in high dose areas where residence time of the wearer is limited due to dose constraints.
PIN diodes are used to quantify the radiation dose for military and personnel applications.
MOSFET dosimetersedit
MOSFET dosimeters [1] are now used as clinical dosimeters for radiotherapy radiation beams. The main advantages of MOSFET devices are:
1. The MOSFET dosimeter is direct reading with a very thin active area (less than 2 μm).
2. The physical size of the MOSFET when packaged is less than 4 mm.
3. The post-radiation signal is permanently stored and is dose-rate independent.
The gate oxide of MOSFETs, which is conventionally silicon dioxide, is an active sensing material in MOSFET dosimeters. Radiation creates defects (which act like electron-hole pairs) in the oxide, which in turn affects the threshold voltage of the MOSFET. This change in threshold voltage is proportional to radiation dose. Alternate high-k gate dielectrics like hafnium oxide, hafnium dioxide[2] and aluminium oxides are also proposed as radiation dosimeters.
electronic, personal, dosimeter, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, j. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Electronic personal dosimeter news newspapers books scholar JSTOR October 2015 Learn how and when to remove this template message The electronic personal dosimeter EPD is a modern electronic dosimeter for estimating uptake of ionising radiation dose of the individual wearing it for radiation protection purposes The electronic personal dosimeter has the advantages over older types that it has a number of sophisticated functions such as continuous monitoring which allows alarm warnings at preset levels and live readout of dose accumulated It can be reset to zero after use and most models allow near field electronic communications for automatic reading and resetting View of readout on an electronic personal dosimeter The clip is used to attach it to the wearer s clothing Four EPDs in chronological orderThey are typically worn on the outside of clothing such as on the chest or torso to represent dose to the whole body This location monitors exposure of most vital organs and represents the bulk of body mass These are especially useful in high dose areas where residence time of the wearer is limited due to dose constraints Contents 1 PIN dosimeter 2 MOSFET dosimeters 3 See also 4 ReferencesPIN dosimeter editPIN diodes are used to quantify the radiation dose for military and personnel applications MOSFET dosimeters editMOSFET dosimeters 1 are now used as clinical dosimeters for radiotherapy radiation beams The main advantages of MOSFET devices are 1 The MOSFET dosimeter is direct reading with a very thin active area less than 2 mm 2 The physical size of the MOSFET when packaged is less than 4 mm 3 The post radiation signal is permanently stored and is dose rate independent The gate oxide of MOSFETs which is conventionally silicon dioxide is an active sensing material in MOSFET dosimeters Radiation creates defects which act like electron hole pairs in the oxide which in turn affects the threshold voltage of the MOSFET This change in threshold voltage is proportional to radiation dose Alternate high k gate dielectrics like hafnium oxide hafnium dioxide 2 and aluminium oxides are also proposed as radiation dosimeters See also editQuartz fiber dosimeter Thermoluminescent dosimeter Film badge dosimeter Comparison of dosimetersReferences edit Archived copy PDF Archived from the original PDF on 2015 04 10 Retrieved 2015 04 04 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link V S Senthil Srinivasan and Arun Pandya Dosimetry aspects of hafnium oxide metal oxide semiconductor MOS capacitor 1 Thin Solid Films Volume 520 Issue 1 31 October 2011 Pages 574 577 nbsp This technology related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Electronic personal dosimeter amp oldid 1191317165, wikipedia, wiki, book, books, library,
