Alpha Sensor - AL54

  • Alpha Sensor
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• Detects alpha, beta and gamma
• Analog and digital output signal
• Very low power consumption (25 µA)
• Sensitivity of the detector: 5 cpm/µSv/h
• High immunity to RF and electrostatic fields

  • Model Number: AL54
  • Data Sheet: Date Sheet File
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Product Specification

Features and benefits

Detects alpha, beta and gamma

Analog and digital output signal

Very low power consumption (25 µA)

Sensitivity of the detector: 5 cpm/µSv/h

High immunity to RF and electrostatic fields

Linear response over a wide temperature range (-30to 60)

Manufactured in Switzerland

 

Fields of application

Radon experiments (detection of the decay products 218Po and 214Po)

Instruments for the detection of radioactivity in the medical environment

Radiation monitors for nuclear surveillance and safety

Detection of illegal substances

Scientific courses and practical laboratory experiments

 

Description of the sensor

The heart of the AL54 radiation sensor is a custom PIN diode covered with a thin aluminum foil to

make it insensitive to light. Electrons (beta) and photons (gamma) easily penetrate the aluminum

foil. Alpha particles which interact with the aluminum foil generate electrons and photons that can be detected by the PIN diode.

 

The analog output of the pulse charge amplifier can be connected to an energy spectrum analyzer to detect radon decay products such as 218Po and 214Po.

 

An integrated pulse discriminator with temperature compensated threshold provides a true TTL

signal output for alpha particles, electrons and photons. The performance of the AL54 solid-state

sensor combined with its extremely low power consumption makes it an excellent choice for physics lab experiments as well as cutting-edge designs.

 

Absolute maximum ratings

Supply voltage, VCC to GND

18.0 V

Output short-circuit current

continuous

Storage temperature range

-65 to 100

 

Electrical characteristics

Unless otherwise indicated specified at:VCC = 5.0 V, TA = 25

Measurement range of dose rate

0.1 µSv/h to 100 mSv/h

Pulse Rate vs. Radiation Rate

5 cpm ± 15% for 1 μSv/h

Energy response

70 keV to 10 MeV

Analog output signal

80mV typical for Am241

Analog output pulse width

100 μs typical for Am241

Digital output pulse level

Equal to supply voltage (positive going)

Digital output pulse width

50 μs to 200 μs (LOWHIGHLOW)

Supply voltage range

2.5 V to 10.0 V (5.0 V recommended)

Supply current, IS

25 µA TYP

Operating temperature range

-30 to 60

 

Sensor characteristics

PIN diode active area

13 mm2

Window Aluminum

9.5 x 9.5 x 0.01 mm

 


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