NIM Modules

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NUCLEAR

				Counting System
Para Electronics offers NIM Modules as per international NIM Standards :				Radiation Monitor
Spectroscopy Amplifier \| Single Channel Analyser \| Scaler Timer				NIM Modules
High Voltage \| Coincidence Unit \| Blank NIM				Spectroscopy
				Data Acquisition
				Special Projects

NSA-1: Spectroscopy Amplifier

NSA-1, Spectroscopy Amplifier, housed in a single width NIM module is designed to cater the requirements of general purpose nuclear spectroscopy applications. NSA-1 Spectroscopy Amplifier includes BLR, & has variable gain and shaping time constants. NSA-1 is ideally suited for nuclear experiments in universities and colleges.

Specifications:

Amplification	:	1500 maximum
Coarse Gain	:	In 8 steps, (1,2,4,8,16,32,64 & 128)
Fine Gain	:	x1 to x2 by Ten turn helipot
Pulse Shaping	:	Near Gaussian, active differentiation and integration.
Shaping Time Const	:	1,2,4,8 & 12 µSec
Pole Zero Adjustment	:	Compatible to detector pulse width of 40 µsec.
Input Pulse Polarity	:	Positive or Negative
Output Pulse Polarity	:	Positive
Input Impedance	:	1 K Ohms
Mechanical	:	Single width NIM conforming to International Standards
Weight	:	Approximately 1 Kg
Supply	:	±12V @ 250 mA


NSCA-1 : Single Channel Analyser

NSCA-1, is a single width NIM module containing Timing Single Channel Analyzer. This module generates TTL pulse corresponding to an input pulse that lies between the base line level (E) and base line + window (∆E) in window mode or pulse with amplitude higher than base line (E) in case of Threshold mode.

Specifications:

Input : 0 to 10 V unipolar / bipolar pulse

Input Impedance : 4 K ohms, DC coupled

Base Line (E) : 0.2 to 10 V adjustable by 10 turn helipot with graduated dial

Window (∆E) 0 to 2V adjustable by 10 turn helipot with graduated dial.

Integral Non-linearity : 0.25% for E and ∆E

Dynamic Range : 50:1

Input Pulse Polarity : Positive or Negative

Mechanical : Single width NIM conforming to International Standards

Weight : Approximately 1 Kg

Supply : ±12V @ 250 mA


NST-1 : SCALER TIMER

NST-1, is a Scaler / Timer, double width NIM module designed for general purpose nuclear counting. It has 6 digit scaler and 4 digit timer. Preset time can be set by thumb-wheel switches in steps of 1 second. NST-1 has separate Start, Stop and Reset switch that enables user to start and stop the timer. Reset switch clears counts to zero.

Specifications:

Scaler
Capacity	:	6 decades upto 999999 counts
Count Rate	:	2 MHz max

Timer
Preset Time	:	1 to 9999 seconds in steps of 1 sec

Mechanical	:	Double width NIM conforming to International Stdandards
Supply	:	Approximately 1 Kg
Weight	:	+6 V @ 500 mA +12V or 50 mA


NHV-1 : High Voltage Power Supply

NHV-1, is a high voltage DC power supply, housed in a double width NIM module. NHV-1 is designed as a HV bias supply for different types of nuclear detectors such as PMT based NaI(Tl) detectors, GM tubes, etc.

NHV-1 provides output from 0 to 1500 V DC at 1 mA. The voltage is settable by 10 turn graduated helipot. Short circuit and overload protection circuits are provided for safe operation.

Specifications:

Output Voltage	:	0 to 2000 VDC @ 1mA
Output Control	:	10 turn helipot with graduated dial
Ripple	:	10mVp-p
Output Protection	:	Short circuit protected
Output Connector	:	BNC receptacle
Mechanical	:	Double width NIM conforming to International Standards
Weight	:	Approximately 1.5 Kg
Supply	:	±12V, ±24V @ 250 mA

NCOIN :Coincidence Unit

NCOIN, a single width NIM module, consists of two input high performance coincidence circuitry with resolving time adjustable from 50 nsecs to 6.4 µsecs. NCOIN receives TTL input from Single Channel Analyzers. A unique feature of the coincidence is the concept of controlled inputs. Unless the control input is first registered the resolving time inspection period is not initiated. This feature reduces detection of false and erroneous coincident events. .

Specifications:

Number of Inputs : Two

Resolving Time : 50 nsec to 6.25 µsec in three selectable ranges
50 - 250 nsec
0.25 - 1.25 µsec
1.25 - 6.25 µsec

Coincidence Condition : Both inputs must appear within the set resolving time

Coincidence Output : Positive TTL pulse 500 nsec width internally adjustable

Mechanical : Single width NIM conforming to International Standards

Weight : Approximately 1.0 Kg

Supply : + 12 V @ 250 mA, - 12 V @ 150 mA,
+ 24 V @ 50 mA, + 6 V @ 250 mA

Blank NIM Modules

Para electronics supplies single / double / triple width Blank NIM modules confirming to international standards. Back panel with 24 Pin Ribbon connector slot or international NIM standard module connector slot can be supplied.