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GAMMA RAY SPECTROMETER - [ Type : GR 611M ] (Microcontroller based)
 
Technical Data

The Gamma Ray Spectrometer (Microcontroller based) Type GR 611M consists of a MINIM based modular counting unit and a Scintillation Detector Type SD 150/151/160W. The Spectrometer can also be used for Gamma Counting applications. This MINIM based system has added advantage of savings in cost and also conserves bench space because of its optimal design.

This system is configured around MINI BIN and Power Supply Type: MB 403 with the following Modules:

High Voltage Unit Type: HV 502
Linear Amplifier Type: LA 520
Single Channel Analyser Type: SC 530
& Counter Timer Type: CT 541A
(Microcontroller based), having unique built-in user programmable features for data acquisition & data outputting.

Features

  • Microcontroller based, compact, rugged, light weight, portable and modular in construction.
  • GR611M can be used with different sizes of scintillation detectors, both flat & well detectors can be connected & used.
  • Uses Microcontroller based Counter/Timer with advanced features for data acquisition & data outputting.
  • Highly regulated variable EHT from 0 to 2000V.
  • Linear amplifier with adj gain and choice of shaping time constants.
  • Single channel analyser facilitates both integral, differential or window counting.
Specifications
MINIBIN AND POWER SUPPLY MB 403
Mini bin
Accommodates SIX / EIGHT single bit modules or combination of multiple widths with Amphenol connectors. Minibin is primarily designed with the objective of conserving bench space and to achieve significant saving in cost of the Minibin based systems. Bussed wiring is provided to the power connectors to distribute +/- 12V and +/- 24V. A control panel with ON/OFF switch, low voltage test sockets is provided on the right extreme side of the bin.
Minibin Dimensions

34.4cm width X 22.1cm height X 27.4cm length.

Minibin Weight

8Kg with modules, 3.8Kg without modules.

Power supply
This is either two and half bit module or a compact box type enclosure fitted at the back of this bin, which generates highly regulated D.C voltages.
Power supply Dimensions
33.6cm width X 12.4cm height X 23.8cm length.
Power supply Weight
5.9Kg.
Input
(230V +/- 10%) A.C, 50Hz.
D.C Output

+12V @ 1.5A, -12V @ 1.5A, +24V @ 0.75A, -24V @ 0.75A 72 watts maximum.

Regulation
Better than +/- 0.3%.
Noise & Ripple

Less than 3mV (rms).

Stability

+/- 0.5% after a 24 hr warm-up at constant line, load & ambient temp.

II. HIGH VOLTAGE UNIT (HV 502)

a. Output voltage variable continuously from 0V to 2000 volts.
b. Output current (max) 1mA.
c. Load & Line regulations : Better than 0.05% of full scale.
d. Indefinite over load & short circuit protections and self recovery.
e. Output ripple less than 10mV (rms).
f. Dimensions : Single / Two bit module

III. LINEAR AMPLIFIER (LA 520)

a. Input Polarity : Positive or Negative
b. Total gain (Typical) : 800 (approx)
c. Output (Unipolar) : 0 to 8V
d. Max. output (Unipolar) : 12V
e. Dimensions : Two bit module

IV. SINGLE CHANNEL ANALYSER (SC 530)

a. Input : Unipolar or bipolar with a +ve leading edge 0 to 10V
b. Pulse Pair resolution (approx): 0.6 micro sec.

c. Output pulse polarity : +Ve
Pulse amplitude : +5V
Pulse width : 0.5 micro sec

d. LLD output pulse amplitude : +5V
Output pulse width : 0.5 micro sec
Base line variable by : 10 turn helipot dial
Base line variation : 0 to 10V by helical potentiometer

e. Window width continuously : Variable by helical potentiometer
(0 - 1) V in window mode
(0 - 10) V in normal mode

f. Dimensions : Single bit module

V. COUNTER TIMER (CT 541A) : COUNTER / RATEMETER

This is a microcontroller based state-of-art Counter / Timer unit having lot of advanced features.

a. Input : 100mV to 10V, unipolar or positive bipolar semi-guassian pulse
b. Pulse width : 0.5 micro sec (min)
c. Polarity : Positive or Negative
d. Input impedance : 1K (approx)
e. Input Counts Capacity : 999999 counts
f. Pulse Height Discrimination : 100mV - 10V by a preset provided on front panel
g. Counts Indication : 16x2 dotmatrix LCD display
h. Modes of Data Acquisition : (a). Counts for a preset time (b). CPS (c). CPM
i. Storage facility : upto 1000 readings
j. TIMER

Preset Time Setting : Programmable through tuctile switch control buttons

k. Preset Time / Elapsed Time :on 16x2 dotmatrix LCD display
l. Preset Time Range : 1 to 9999 Sec
m. Built-in printer port facilitating direct data printing
n. Additional Options :
i. Data communication software for down loading of data can be given at extra cost .

VI. APPLICATIONS

The system finds wide range of applications in nuclear research and academic fields which include:
Analysis of gamma radiation Identification of unknown isotopes and their relative abundance.
Measures the strength of radio activity of sample.
Useful in radiotracer techniques.
Can be use for protein bound iodine studies in medicine using well type scintillation head etc.
Swipe sample counting in Health Physics Labs.

 

Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone:+91-40-27263701,27262146,040-68888777, Fax : 040 - 27262146
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