Environmental Sensors (Geiger counters, etc)

If you're looking for the Safecast radiation mapping effort, check here:
 * 1) http://safecast.org/
 * 2) http://safecast.org/wiki/index.php/Main_Page

Hardware: Pieter / Akiba

Geiger References Commercial instruments we own
 * Herbert Friedman, Geiger Counter Tubes, [[Media:geiger_friedman_1949.pdf]]
 * IEEE Standard Test Procedures and Basis for Geiger-Mueller Counters, [[Media:Geiger_test_proc.pdf]]
 * Joe Jaffe, Dan Sythe, Steve Weiss, Radiation Monitor, [[Media:radiation_monitoring_dan.pdf]]
 * Pavel Degtiarenko and Vladimir Popov, New Techniques of Low Level Environmental Radiation Monitoring at JLab, [[Media:new_pavel_2010.pdf]]
 * Vladimir Popov, Pavel Degtiarenko, Precision Environmental Radiation Monitoring System, [[Media:precision_popov_2009.pdf]]
 * C.J. Sullivan, S.E. Garner, M. Lombardi, K.B. Butterfield, M.A. Smith-Nelson, Evaluation of Key Detector Parameters for Isotope Identification, [[Media:evaluation_sullivan_2007.pdf]]
 * (en) Types of G-M counters http://www.albert-cordova.com/Cdv700/geiger-counters.htm
 * (en) A product manual, has good background info on radiation http://www.nit-as.no/assets/Haandboeker/sensorer/engelsk/Geiger%20muller.pdf
 * (en) DIY G-M counter by Yasuyuki ONODERA http://einstlab.web.fc2.com/geigerE/GeigerE2.pdf
 * (en) An in-depth primer on G-M detectors from Centronic www.centronic.co.uk/downloads/Geiger_Tube_theory.pdf

Technical data about and schematics with (Russian) GM tubes NB: Kalin how do we convert имп/мкР (counts/μR)-> c/μSv ?
 * (ru) Digital dosimeter with two "СБМ 20" tubes by UA9KBT http://radiokot.ru/circuit/digital/measure/31/
 * (ru) Technical data for Russian GM tubes http://un7ppx.narod.ru/info/raznoe/geyger.htm
 * (ru) Technical data for Russian GM tubes http://www.vniitfa.ru/images/stories/Catalogy/image050.png
 * (ru) DIY GM tube and counter http://radiomaster.com.ua/1880-schetchik-geygera-iz-podruchnyh-sredstv.html

NB: СИ42Г has two anodes with common cathode. Anode-2 (on back side) is always at +400V, Anode-1 (with the small pointed tip) is at +400V (up to 10E-5 R/h, Cs-137: 1.57±0.31 имп/мкР (counts/μR)) or +100V (10 R/h, Cs-137:157±23 имп/мкР (counts/μR)).