title: A complete low cost radon detection system.
abstract: Monitoring the (222)Rn activity through the 1200 km long Northern Anatolian fault line, for the purpose of earthquake precursory, requires large number of cost effective radon detectors. We have designed, produced and successfully tested a low cost radon detection system (a radon monitor). In the detector circuit of this monitor, First Sensor PS100-7-CER-2 windowless PIN photodiode and a custom made transempedence/shaping amplifier were used. In order to collect the naturally ionized radon progeny to the surface of the PIN photodiode, a potential of 3500 V was applied between the conductive hemi-spherical shell and the PIN photodiode. In addition to the count rate of the radon progeny, absolute pressure, humidity and temperature were logged during the measurements. A GSM modem was integrated to the system for transferring the measurements from the remote locations to the data process center.
authors.affiliation: İstanbul Technical University, Faculty of Science and Letters, Department of Physics Engineering, 34469 Maslak, Sarıyer, İstanbul, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Bayrak
authors.forename: E
authors.initials: E
authors.lastname: Barlas
authors.forename: E
authors.initials: E
authors.lastname: Emirhan
authors.forename: Ç
authors.initials: Ç
authors.lastname: Kutlu
authors.forename: C S
authors.initials: CS
authors.lastname: Ozben
mesh_terms: D040421:Cell Phone / Q000191:economics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D010783:Photometry / Q000191:economics / Q000295:instrumentation*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000191:economics / Q000295:instrumentation*; D011886:Radon / Q000032:analysis*; D058998:Remote Sensing Technology / Q000191:economics / Q000295:instrumentation*; D012666:Semiconductors / Q000191:economics; D014421:Turkey
chemical_list: D011886:Radon