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Modernization of thermal imaging diagnostics

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Radiation beam modification PIB produces in the surface layers of materials compositions and structures that are not available to any of the traditional metallurgical methods. Cost-effectiveness of a radiation beam modification PIB determined by a number of competitive technological advantages over other methods of modifying the materials used in the industry. First of all, it should be stressed high resource efficiency, environmental friendliness and uniqueness of the results achieved through the use of a pulsed exposure to the material or medium.

Research staff had created pulsed ion accelerator TEMP 4M, oriented applied research,  related to the impact of PIB on the materials, as well as for use in industrial processes in the laboratory №1 Tomsk Polytechnic University, where I am engaged in research work.

One of the most important parameters of the ion beam used for surface modification is the energy density of the beam on the surface of the workpiece. It is this parameter determines the depth of the modified layer of the workpiece and surface properties.  The PIB developed and successfully used thermal imaging diagnostics distribution of ion beam energy density to measure this parameter, which is based on registration of the heat beam footprint on the target with the help of an infrared camera FLUke Ti10 in the laboratory №1. The aim of my research work is the optimization and upgrading of thermal imaging diagnostics to eliminate systematic measurement errors due to delay registration of the thermal imager beam print.

To achieve this goal my next major tasks will be solved:

1. Analysis of known errors in the method of thermal imaging diagnostics;

2. Developing ways to reduce the impact of errors on the measurement result the restoration of the original value of the measured beam energy density;

3. Experimental verification of the developed methods to reduce measurement errors;

4. Development of measurement methods beam energy density with a thermal imaging diagnostics with the proofs of known errors.

Proposed method of solving tasks is the creation of a remote control device imager for measuring parameters of a beam with minimal delay registration of the thermal print after the moment of generation of the ion beam. This approach would improve the currently existing thermal imaging diagnostics.

Thus, the task of modernizing methods for measuring ion beam energy density with a thermal imager is relevant for the control parameters of the PIB and as a result for all applications of pulsed ion beams.


Stages of the project

1. Analysis of the known method of thermal imaging diagnostic errors;

2. Development of methods for reducing the effect of errors on the measurement result , the restoration of the original value of the measured beam energy density;

3. Experimental verification of the developed methods to reduce measurement errors;

4. Development of techniques for measuring the beam energy density with a thermal imaging diagnostics with the proofs of known errors.

Project objectives

1.1 Familiarization with the physical principles of high-power ion beams in diodes with magnetic insulation;

1.2. Introduction to the principle of operation of the accelerator TEMP-4M  and location of the diagnostic equipment;

1.3. A detailed study of the thermal imaging diagnostics measuring the ion beam energy density at the target;

1.4. Calibration of thermal imaging diagnostics (setting the output window transmittance of CaF2 );

1.5. Experimental determination of the distribution of the ion beam energy density generated by various types of diodes;

2.1 Developing ways to reduce the impact of errors on the measurement result;

2.2 Selection of the most appropriate ways;

3.1 Conducting experiments;

3.2 Bringing to the only way of solving;

4.1 Construction of an automated installation;

4.2 Error correction.



Records project

1. The current status of the project;

 There is a completion of the tasks set out in point 1 at present and being an agreement with Chinese counterparts to provide the necessary spare parts.


2. Comparison to similar;

 There is a similar device in China at the moment,. It is and mutual cooperation with Chinese scientific laboratory colleagues. 


3. A brief relevance;

Background associated with the prospect of the use of intense pulsed ion beams to solve a number of applications , primarily connected with the modification of the surface of materials. Modification of the surface of metals PIB is one of the most promising materials hardening methods. The mechanism of pulsed ion beam is a rapid heating and cooling of the surface layer of the article. The result is a kind of hardened surface layer, which results in a positive change in surface properties ( hardness increases the surface roughness is reduced and improved wear resistance etc). One of the most important parameters of the PIB is the distribution of the ion beam energy density over the cross section, which need to be monitored during the irradiation of products.

 

4. Experimental determination of the distribution of the ion beam energy density generated by various types of diodes;

The next step was the experimental determination of the distribution of the ion beam energy density at the target. We processed the data thermograms made the temperature distribution over the cross section in the Smart-View program. 


5. Calibration of thermal imaging diagnostics (setting the output window transmittance of CaF2 );

The first pilot phase of our work was to calibrate the thermal imaging diagnostics, registration warm imprint on the metal target produced through a thermal imager lead-out box, which was located in the accelerator diode chamber. This window was made of calcium fluoride. CaF2 has a non-uniform transmission spectrum of the long-wave imager, so the temperature detecting get distorted values ​​that do not correspond to the actual values ​​of the temperature in the chamber. We performed calibration to account for this uncertainty.  We made of stainless steel metal bath, of the same material from which the target was prepared, coated one side matt black paint to increase emissivity from that surface in the laboratory №1 for it. In  first of all, we poured warm water in the tub and then recorded heat source heating temperature values through the window and no window. The Smart-View program was plotted temperature distribution along the center line of the thermal print. 


6. A detailed study of the thermal imaging diagnostics measuring the ion beam energy density at the target;

The PIB developed and successfully used thermal imaging diagnostics distribution of ion beam energy density to measure this parameter, which is based on registration of the heat beam footprint on the target with the help of an infrared camera FLUke Ti10 in the laboratory №1. To register a fingerprint generated heat beam at a metal target using the standard Fluke thermal imager, the registration was carried out via transparent to infrared radiation lead-out window of the calcium fluoride. The temperature distribution on the target translated into the distribution of the energy density, given the geometry of the target size. The target used in steel plate 100 um thick. This diagnosis is of higher spatial resolution than standard calorimetric techniques. 


7. Familiarization with the physical principles of high-power ion beams in diodes with magnetic insulation;

My first step was a theoretical introduction to the physical principles of high-power ion beams in diodes with magnetic insulation. The TEMP- 4M accelerator to generate an ion beam is used with the magnetic self-isolation diode. The principle of operation is two diode pulsed accelerator operation. By applying the first negative pulse to the diode is formed thereon explosion - emission plasma. After the second application of the positive pulse of the ion beam plasma is drawn, which is accelerated by the electric field in the anode-cathode gap and passes through the slits of the ground electrode. Further out in the area of transportation, where it recorded a thermal imager.

Project members
Айман Жунусова
Владелец
Екатерина Иванченко
преподаватель маркетинга
Иван Зернин
преподаватель маркетинга