An ionization chamber is a type of radiation detection device. In an ionization chamber, two opposing electrodes are placed in a container filled with gas, and a high voltage is applied. As the charged particles (radiation) pass through the gas, the gas molecules are ionized to produce ions and electrons.

Since a voltage is applied inside the container, electrons with a negative charge are attracted to the positive electrode and ions with a positive charge are attracted to the negative electrode. As a result, an electric current flows in the circuit, and this current allows the detection of radiation. If the voltage applied to the electrodes is too low, the separated ions and electrons will recombine before they reach the electrodes. Therefore, a sufficient voltage of several tens to several hundred V is required in the ionization chamber.

A proportional counter is one in which the voltage in the ionization chamber is increased above a certain level. When the voltage is increased, the two electrodes act as an accelerator, accelerating the electrons generated by the charged particles.

The accelerated electrons secondarily ionize the gas molecules, resulting in a current that is larger than the primary ionization current. Proportional counters make use of this amplification effect. GM tubes are another type of radiation detection device that uses the ionization of the electrode and gas.

Matsusada Precision offers a large number of high voltage power supplies that can be used for ionization chambers featuring low ripple, compact body, and ratings of 0 to 1 kV.

visualisation of ionization chamber
Related words:
  • Accelerator
  • Radiation
  • Radiation detection
  • Proportional counter
  • GM tube
  • Ionization

Recommended products

With a large number of high voltage power supplies that can be used for ionization chambers featuring low ripple, compact body, and ratings of 0 to 1 kV.

ES series

ES series

output voltage
0 to +5 kV/-5 kV
output current
0 to 15 mA
output power
0 to 15 W
Wide lineup that can select the optimum one

Wide lineup, Compact bench top units for PMT, MCP applications

TM series

TM series

output voltage
0 to 3kV
output current
0 to 2mA
output power
0 to 1.6W
Ultra Low Ripple PCB Mountable High Voltage Power Supply

Low ripple, high stability

AU series

AU series

output voltage
0 to +120kV/-120kV
output current
0 to 2.2A
output power
0 to 2.2kW
Low profile and lightweight

Digital interface is available.Wide lineup of over 300 models, Various remote control and monitor functions

ASX series

ASX series

output voltage
0 to +3.1 kV/-3.1 kV
output current
0 to 5 mA
output power
0 to 15.5 W
Bestseller model among various international research institutes

Ultra-low ripple 1mVp-p with high stability 50ppm/H, Perfect for driving photomultiplier tubes

AE/AF series

AE/AF series

output voltage
0 to 150kV/-150kV
output current
0 to 120mA
output power
0 to 300W
Ultra low noise and overwhelming high stability

High stability 50ppm/Hr, Digital interface is available. Ultra low ripple 10ppm and spike noise with our proprietary switching circuit

RSS series

RSS series

output voltage
0 to 20 kV
output current
0 to 30 mA
output power
0 to 30 W
Compact, high stability and low noise

Both external VR and voltage for output control

J4/J6 series

J4/J6 series

output voltage
0 to 5kV
output current
0 to 8mA
output power
6W Max
High Voltage Power Supply for PMT

Ideal for photo tubes, GM tubes, and radiation counters

JB series

JB series

output voltage
0 to 2kV
output power
0 to 2.5W
output current
0 to 8mA
High Voltage Power Supply for PMT

High power and Low noise