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Hello all!
In this video I will show you initial setup and calibration of AtomSpectra 3 scintillation detector.
AtomSpectra 3 scintillation detector is made for use with iPhone, iPad, iPod or PC. Android software is coming soon.
The detector activates automatically when connected.
Now I launch GeigerBot application (Thank you Nick!) and choose settings.
In settings - Geiger counter - Device I choose AtomSpectra 3.
I need to make sure that gamma spectroscopy mode is ON.
I exit settings and switch to Spectrum bar graph screen.
I use Signalite SG77 spark gap for calibration.
This caesium-137 activated spark gap can be bought on Ebay.
Caesium-137 is nice for 2-point calibration: it emits gamma radiation with energies 31 and 662 kEv.
I will tell you few words about AtomSpectra 3 detector while it gathering pulses.
AtomSpectra 3 detecor is based on 16*40mm NaI(Tl) scintillation crystal.
The crystal is coupled with spectrometric photomultiplier tube.
Stabilized high-voltage power circuit, Lithium-ion battery and low-noise signal processing circuit are made inside the detector.
Built-in Lithium-ion battery can power the detector for more than 15 hours continuously.
The battery can be recharged from USB, full recharge takes hour and a half.
The detector is quite sensitive: about 6500 pulses per microRoentgen of dose.
We will get 1000-1500 cpm readings under normal radiation background (10 - 15 uR/h or 0.1-0.15 uSv/h).
This detector can be used for searching because of it's high sensitivity.
Now some time passed and I can proceed to calibration.
I switch to full-screen mode for accuracy.
The main 662 kEv peak is in the 9846 bin.
The X-ray 31 kEv peak in in the 446 bin.
Now I go to settings mode.
In settings mode I need to enter at least two calibration points.
Now I enter 31 kEv corresponding to bin number 446
and enter 662 kEv corresponding to bin number 9846.
I exit calibration mode.
The calibration is finished. Enjoy!
Thank you for watching!