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Canberra 2015A - User Manual

Canberra 2015A
56 pages
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Model 2015A
Spectroscopy
Amplifier/Timing SCA
User’s Manual
9231694B 01/05
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Summary

Introduction

Applications

Highlights important features and representative areas where the module might be applied.

Low Level Alpha Beta Counting System

Describes the use of the Model 2015A in a specific detector system configuration.

Controls and Connectors

Front Panel Controls and Connectors

Describes the front panel controls and connectors of the 2015A Amplifier/TSCA.

Rear Panel Connectors

Describes the rear panel connectors of the 2015A Amplifier/TSCA.

Internal Controls

Illustrates and describes the internal controls and jumper settings for the 2015A.

Operating Instructions

Spectroscopy System Operation

Familiarizes users with the operation and controls for best performance in a gamma spectroscopy system.

Initial Setup Procedures

Details the initial setup steps, including jumper plug settings and connections.

Performance Adjustments

Explains critical adjustments like pole/zero for optimal resolution and baseline recovery.

Resolution Versus Count Rate and Shaping

Discusses the impact of shaping time constants on resolution at varying count rates.

Resolution Destroying Interfaces

Identifies common issues like vibration, radio interference, and ground loops that affect resolution.

SCA Operation

Details the setup procedure for the Single Channel Analyzer (SCA) mode.

SCA Operation Setup

Details the setup steps for the SCA operation using a pulser and oscilloscope.

Reference Data on Cables

Provides cable compatibility data and output pulse examples for RG-58 and RG-62 cables.

Preventative Maintenance

Provides guidance on cleaning the front panel of the unit.

Performance Check

Equipment Required for Performance Check

Lists the necessary equipment for performing the performance checkout procedure.

NIM Voltage Check

Details how to measure and verify NIM power supply voltages.

Current Measurements

Describes how to measure and verify the current draw of the unit.

Amplifier Operational Checks

Outlines the procedure for checking the amplifier's operational parameters.

Amplifier Output Checks

Describes how to check the amplifier output signal shape and amplitude.

Pole;Zero Adjustment

Guides the adjustment of the pole/zero control for optimal pulse tail return.

Coarse and Fine Gain Controls Verification

Details how to check the proportionality of output amplitude across coarse gain settings.

Shaping Checks

Verifies the unipolar pulse shape for different shaping time constants.

Noise Measurement

Describes the procedure for measuring the unit's noise contribution.

Linearity Check

Explains how to test the integral nonlinearity of the amplifier over its dynamic range.

SCA Operational Checks

Outlines the setup for verifying the Single Channel Analyzer (SCA) functionality.

SCA Output Verification

Describes how to check the SCA output pulse parameters and logic.

Timing Walk Test

Measures the timing walk of the SCA output relative to changes in input amplitude.

External Lower Level Check

Tests the external control capability of the Lower Level (E) discriminator.

Normal Internal Control Settings

Lists the usual positions for internal jumper plugs before replacing covers.

Circuit Description

Block Diagram Description

Outlines the signal flow through the amplifier and SCA sections.

The Amplifier Circuit

Describes the signal path and amplification stages within the amplifier.

The SCA Section Circuit

Details the circuitry of the Single Channel Analyzer (SCA).

Gain Amplifier Circuit

Explains the configuration and operation of the gain amplifier stages.

Input Amplifier K1 Circuit

Describes the differentiation network, pole/zero cancellation, and input polarity selection.

Gain Amplifier K2 Circuit

Details the gain control and overload protection features of amplifier K2.

Integrator Amplifier A5 Circuit

Explains the complex pole integrator and active filter networks for shaping.

Amp OUTPUT Integrator and Driver Circuit

Describes the output amplifier stage and driver transistors.

Restorer Circuit

Details the circuitry of the restorer, which monitors and maintains the output baseline.

SCA Output Signal

Describes the characteristics and logic levels of the SCA OUTPUT signal.

SCA Section Operation Details

Elaborates on the timing and logic of the SCA output generation.

Disc Output Signal

Describes the DISC output signal, its modes, and characteristics.

Lower Level (E) Threshold Circuit

Details the circuit for generating the Lower Level (E) discriminator reference voltage.

Window (ΔΕ) Threshold Circuits

Explains how the WINDOW (ΔΕ) reference voltage is generated.

Fast Discriminator Reference Voltage

Describes the reference voltage generation for the fast discriminator.

5 Volt Power Supply Circuit

Details the circuit for providing the +5 volt supply.

Troubleshooting

Troubleshooting Aids

Lists essential test equipment and documentation for troubleshooting.

Troubleshooting Techniques

Provides systematic steps and considerations for diagnosing malfunctions.

Component Replacement

Guides on ordering and replacing components, including necessary information.

Specifications

Input Specifications

Describes the input signal characteristics and connector type.

Output Specifications

Details the characteristics of the AMP OUTPUT and SCA OUTPUT signals.

Input;Output Capabilities

Describes the multi-function capability of the DISC connector and signal types.

Front Panel Controls

Lists and describes the function of each front panel control.

Internal Controls and Jumper Settings

Explains the function of jumper plugs for output impedance, DISC, LLD, and SCA mode.

Amplifier Performance

Details key performance metrics like gain, drift, nonlinearity, and noise.

SCA Performance

Details performance metrics for the SCA function, including timing and linearity.

Connectors

Lists the types of signal and power connectors.

Power Requirements

Specifies the DC voltage and current requirements for the unit.

Physical Specifications

Provides size, weight, and NIM module compatibility.

Environmental Specifications

Lists operating temperature and humidity ranges.

Installation Considerations

Canberra 2015A Specifications

General IconGeneral
BrandCanberra
Model2015A
CategoryMeasuring Instruments
LanguageEnglish

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