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X-ray Ratemeter IR-2

X-ray Ratemeter IR-2 is intended for the X-ray beam intensity measurement. Its a combination of a scintillation detector head, a control block and can be used for registration of X-ray beam as a part of various X-ray instruments, e.g. X-ray diffractometers. X-ray Ratemeter provides visual evaluation of X-ray beam intensity via pointer indicator.

X-ray Ratemeter can operate both manual and computer control mode.

General view of X-ray Ratemeter IR-2

Environment conditions:

    - temperature from +10 to +35° C;
    - relative humidity up to 80% at 25° C;
    - atmosphere pressure 84 - 107 kPa.

Specification

Energy range

 5 - 30 keV

Crystal-scintillator

 NaI(Tl)

Effective diameter of entrance window

 24 mm

Diameter of detector mounting part

 40 mm

Counting rate

 1 - 1·105 cps

Range extension up to

 3:1

Noise level at  5.9 keV

 <1cps

Time constant, s

 0.5, 1, 2, 5, 10, 20

Amplifier-discriminator output

 TTL

Thresholds adjustment

 0...  -2.5 V

PMT voltage adjustment

 0... -812 V

Sound monitor

 yes

Power feeding                                                

120...240 VAC, 50(60) Hz

Instrument components

X-ray Ratemeter consists from a detector block and a control block, connected by a low voltage cable of 1.5 m length.

Detector block SCSD-4 includes a NaI(Tl) scintillation crystal, photomultiplier (PMP), driver amplifier, amplitude discriminator, high voltage supply.

Control block includes AC/DC converter, ratemeter card with a channel of audio presentation, control elements, pointer indicator, connectors, LED indicator.

Arrangement and operation of Ratemeter

Detector block SCSD-4 converts X-rays to electrical pulses of TTL level.

Control block allows the changing of PMP voltage, lower and upper thresholds for the operation with different wavelengths of X-rays. The switch "Window/Integral" turnes off the upper threshold. Control block is adjusted for CuK-alpha radiation and a definite detector block before delivery to a customer. A user can adjust the Ratemeter himself for another radiation or for another detector block from Radicon Ltd.

Rotary wafer switch and potentiometer "Range, cps" selects the amplidude range of a pointer indicator. A potentiometer scale has an approximate view.

Rotary wafer switch "Time constant, sec" dumps out the oscillations of a pointer indicator on a low intensity ranges.

Potentiometer "Volume" controls the audio presentation.

The switch "Man/PC" swithes a mode of operation: manual or from a personal computer.

The software and a dynamic library are delivered as an option.

 

 

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