Instrumentation for Radiation Measurements

Lecturer:

Petr Průša (gar.), Josef Voltr (gar.)

Tutor:

Petr Průša (gar.), Josef Voltr (gar.)

Supervisor:

Department of Dosimetry and Application of Ionizing Radiation

Synopsis:

Methods of the processing of signal from detectors of ionizating radiation, spectroscopical systems, data processing and overview of the related electronics.

Requirements:

Knowledge of the detectors of ionizing radiation and overview of electronics.

Syllabus of lectures:

1. Basic systems for ionizating radiation measurement.Keystones of pulse electronics, signal, impedance, C-R and RC circuits, pulse transformator.

2. Interconnection of detecrors to other circuit, HV feeding and signal take off from

GM counters and scintillation detectors by means of one coaxial cable,

simultaneous take off time and amplitude information from scintillation and

semiconductor detectors.

3. Voltage and charge sensitive preamplifiers, noise problematic, ways of

integration capacitor discharge, block diagram, signal RESET (INHIBIT). Charge

gains dependence on input capacity and preamplifier open loop gain.

4. Spectroscopy amplifiers. Amplifying, linearity and over range definitions. Signal shaping, function of special circuits as for as P/Z cancellation, base line restorer (BLR), PUR and their

right set-up. Examples of amplifier diagrams.

5. Shape, time and amplitude measurements. Shape differentiation. Derivation of reference time, coincidence/anticoincidence, resolving time. Analog pulse amplitude measuring, single channel analyzers. Analog-to-digital converters.

6. Multichannel analysis. Principles, PHA and MCS operation mode. Multidimensional operation. Dead time, spectrum stabilization. DSP.

7. Spectrum evaluation. Response function, deconvolution, stripping, smoothing, peak analysis. Numerical processing.

8. Low and high voltages power supplies for nuclear electronics, requirements

and their solutions. Protection circuits. Low dc current and charg measurement.

Protection no/or under cooled semiconductor detector against HV connection.

9. Modular systems NIM, CAMAC, VME. Analog and logic signals standardization. Data exchange between units and computer control.

Syllabus of tutorials:

Study Objective:

Knowledge:

An overview of the methodology of signal processing and its use for spectroscopy of ionizing radiation.

Skills:

Ability to work with spectroscopy electronics and to handle obtained results.

Study materials:

Key references:

[1] Knoll Glenn F., Radiation Detection and Measurement, John Wiley & Sons, N.York

2000

Recommended references:

[2] Seda J., Sabol J., Kubalek J., Nuclear Electronics. SNTL Prague, 1977(in Czech)

[3] Kowalski E., Nuclear Electronics, Springer-Verlag Berlin Heidelberg N.York

1970

Note:

Time-table for winter semester 2011/2012:

Time-table is not available yet

Time-table for summer semester 2011/2012:

Time-table is not available yet

The course is a part of the following study plans: