You probably want to find out how to make a Geiger counter with his hands in home criteria of the neon lamp running on beta and palette radiation, as well as to collect the usual personal dosimeter from the everyday tester, needles, wire and plastic bottles.

• How to make a Geiger counter.

The principle acts Geiger their hands based on the ignition of the neon lamp flux of ionizing particles (our device will detect beta and gamma radiation). Take an ordinary neon lamp and plug it to the schema that will handle the amperage a bit lower than the ignition voltage of the lamp. The more radiation, the more time the neon lamp will be going into a phase of ignition through a loudspeaker emitting a corresponding crack and warning us about radiation.

[puc.1 Diagram of a Geiger counter in your home criteria (plugged)]

Diodic D1 rectifies the alternating current. The Zener diode D2 aligns voltage at 100 Volts, and the power of resistance of the resistor R1 is using the formula: R=(Vac-100V)/(5mA). Resistor R2 to adjust the voltage to the lamp was practically on fire.

• Diagram of a conventional dosimeter radiation.

Unlike homemade Geiger counter, which registers the beta — and gamma — radiation time, the principle acts of the instrument differs only in that it integrates the radiation dose that can be seen from units of the device, the amount of radiation for a period of time.

As can be seen from figure [puc.2 Diagram of a conventional dosimeter], the plastic bottle is cut so that the curved iron needle, threaded through holes in the cap of the bottle, almost touches the bottom of the cans, in which the bottle is inserted.

On to the needle is attached field-effect transistor KP A, which in turn is connected ordinary Chinese resistance tester.

The final step for the production of conventional dosimeter radiation in home criteria will wrap the copper wire in one layer around the cans and connect it with the black probe of the tester.

Unlike a Geiger counter with their own hands, the result of a personal dosimeter is not in the power of the corresponding cod, and is displayed on the display of the tester in the resistance measuring mode.

We recommend you to calibrate it using the control source of radiation. Remember that homemade dosimeter is only effective at very close distance from the source of ionizing radiation.

How to make dosimeter 3:34


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