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Topic: Proportional counters

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	Geiger Counter Encyclopedia Articles @ LaunchBase.com (Launch Base) (Site not responding. Last check: 2007-10-23)
		However, the window on the scintillation counter is too thick to allow beta particles to enter the detector.
		Gas detectors with the ability to both detect radiation and determine particle energy levels (due to their construction, test gas, and associated electronics) are called proportional counters.
		Some of the proportional counter have many internal wires and electrodes and are called multi-wire proportional counters or simply MWPCs.
	www.launchbase.com /encyclopedia/Geiger_counter (688 words)

	digital proportional motor controls -- digital proportional motor controls (Site not responding. Last check: 2007-10-23)
		illumination on a surface is inversely proportional to the square of the distance of the light...
		a voltage that is proportional to the angular...
		Proportional Controls The digital proportional controller on this car offers at least 3 degrees of left/right steering, using a steering motor, and 3 forward and reverse speeds.
	www.motorcontrolskill.com /digitalproportionalmotorcontrols (2225 words)

	Data and Archive Centers Resources
		The Einstein Observatory was a satellite based imaging X-ray telescope in operation from November 1978 to April 1981.
		The focal plane detectors included two Imaging Proportional Counters (IPC), three High Resolution Imagers, an Objective Grating Spectrometer (OGS), a Focal Plane Crystal Spectrometer (FPCS) and a Solid State Spectrometer (SSS).
		The most commonly used instrument was the IPC, which made nearly 4000 observations of astronomical sources.
	cdsweb.u-strasbg.fr /astroweb/center.html (7430 words)

	Detector - X Ray Detector (Site not responding. Last check: 2007-10-23)
		X-Ray Pro Proportional Counters / Mössbauer Detector Sales
		Sells a variety of gas filled proportional counters, with several mixtures of
		Develeopment and commercialisation of X-ray and gamma ray detectors and spectrometric
	www.detectorinfo.com /xraydetector (212 words)

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