Выпуск 4, 2013 г.

Some aspects of radiation tests of analog bipolar circuits considering ELDRS effect

K.I. Tapero, A.S. Petrov, V.N. Ulimov, A.M. Chlenov

The degradation of bipolar operational amplifiers LM124J depending on dose rate and temperature at radiation is researched. It is shown that the degradation level of probed devices owing to ionizing dose effects considerably increases, if dose rate decreases below 0,01 rad(Si)/s that isn\´t typical for most bipolar devices. It complicates the use of criteria of enhanced low dose rate sensitivity (ELDRS) which are defined in existing standards for radiation test. On the basis of received experimental results are offered recommendations for optimization of procedures of low-intensive ionizing radiation resistance tests for bipolar circuits.
Keywords: bipolar integrated circuits, radiation resistance, ELDRS effect.

Engineering calculation method of dependence of change of parameters and radiation resistance of products of semiconductor technology from ionizing radiation intensity

V.I. Vanin

The engineering calculation method of dependence of change of parameters of products of semiconductor technology from ionizing radiation intensity, considering main engines of formation of radiation defects and their relaxation at radiation is offered. It is shown that by the form of dose change of parameters of products of semiconductor technology at high ionizing radiation intensity it is possible to judge existence or absence of low intensity effect at examinees products of semiconductor technology.
Keywords: ionizing radiation, failure dose, radiation defects, ionizing radiation intensity, products of semiconductor technology.

Simulation and forecasting of component degradation of bipolar and CMOS technologies in fields of space nonstationary dose rate

G.I. Zebrev, V.S. Anashin, G.A. Protopopov, P.A. Chubunov, A.E. Kozyukov, I.V. Elushov, R.G. Useinov

Degradation of parameters of integrated circuits (IC) is described as a functionality from radiation, electrical and thermal history of onboard devices. The option of model and independent uniform test procedure for CMOS and bipolar ICs is offered.
Keywords: dose rate, degradation, ELDRS, bipolar technology, CMOS, forecasting.

Regularities of ionization current pulse shaping in power rails of electronic systems with nonuniform functional structure

V.N. Ustyuzhaninov, T.N. Frolova

System regularities of synthesis of integral pulse of ionization current in power rails of digital electronic systems containing the functional modules of different types at influence of ionizing radiation pulse in static functioning modes are considered.
Keywords: ionizing radiation pulse, ionization current pulse, electronic digital systems.

Comparing of results of full-scale and simulation experiments for MOS transistors radiation

N.V. Kuznetsov, P.N. Oreshkov, V.D. Popov

The experimental results of radiation tests of MOS transistors at different dose rate are presented. The results of full-scale experiment onboard ISS are compared.
Keywords: MOS transistor, tests, dose rate, experiment.

Research of dose degradation of measuring accuracy of temperature sensors DS18B20

M.Yu. Nikiforova, V.D. Popov

Influence of ionizing radiation with different dose rate on measuring accuracy of thermal sensors DS18B20 at their functioning in different electrical operation modes in radiation conditions is researched.
Keywords: temperature sensor DS18B20, ionizing radiation, measurement error, dose rate, electrical operation mode.

Influence of pulse gamma radiation on powerful laser diodes

N.V. Basargina, I.V. Vorozhtsova, S.M. Dubrovsky, E.V. Smirnov, O.V. Tkachev, A.V. Fomin, V.P. Shukaylo

Results of researches of influence of pulse gamma radiation on output power of laser diodes lines with wavelength of 808 nanometers and a rated injection current 60 A are presented. Measurements made directly at the time of radiation influence in exposure dose rate from 10⁹ to 10¹² R/s. It is shown that at exposure dose rate more than 10¹¹ R/s in researched instruments a laser radiation is generated.
Keywords: gamma radiation, laser diodes, researches.

Session functioning mode of temperature sensors DS18B20 at influence of low-intensive ionizing radiation

M.Yu. Nikiforova

The functioning mode of digital temperature sensors DS18B20 with interchange of electrical modes in the conditions of influence of low-intensive ionizing radiation with different dose rates is considered. The approximation of dependences of limit radiation dose value appropriate to the given limiting error of measurement, from measuring accuracy and number of switchings of electrical functioning modes are offered. The increase of lifetime of temperature sensors is recommended as a result of deceleration of speed of dose degradation of a measurement error before a limit status at which their measuring accuracy don’t correspond to operational requirements.
Keywords: temperature sensor DS18B20, low-intensive ionizing radiation, electrical mode functioning, measuring accuracy, dose rate, lifetime.

Research of aging process of CMOS chips at long low-intensive gamma radiation

V.D. Popov, Chzho Co Vin

Results of determination of density of surface states in MOS devices of CMOS IC at gamma radiation in passive and active modes are presented.
Keywords: integrated microcircuit, aging process, low-intensive gamma radiation, surface states.

Research of influence of neutron radiation on ATmega 8 microcontroller functioning

K.A. Ignatov, O.S. Krotova, E.N. Krylevsky, V.V. Gaganov

The functional tester for distant monitoring of operability of microcontroller at influence of neutron radiation is developed and made. The program and hardware for testing of microcontroller functional units are de-scribed. Results of research of single events effects in microcontroller ATmega8 at influence of neutrons with energy of E = 14,7 MeV and fission neutrons are presented.
Keywords: microcontroller, single events, experiment.

Influence of structural changes in fuel core from uranium dioxide on deformation behavior of high-temperature fuel element

S.V. Alekseev, V.I. Vybyvanets, A.S. Gontar, M.V. Nelidov

The experimental data about research of kinetics of structural changes in fuel core from uranium dioxide with columnar structure of grains, and also creep and swelling speed characteristics of such dioxide are presented. In relation to operation modes of high-temperature fuel element of thermoemissive nuclear power plant is offered the technique and the calculation of deformation behavior of fuel element on the basis of dense uranium dioxide with preferentially open porosity and taking into account its structural changes is resulted.
Keywords: high-temperature fuel element, uranium dioxide, columnar structure of grains, technique, deformation behavior of fuel element.

Calculation method of heat electrophysical characteristics of thermoemissive electrogenerating channel by loop tests

V.U. Korolev, V.V. Kuznetsov

The technique of determination of output characteristics and temperature fields of termoemissive electrogenerating channel, considering temperatures of supporting pipe of loop channel during tests is offered. The heat electrophysical parameters of electrogenerating channel taking into account non-uniformity of temperature of collector and differential cesium vapor-pressure in electrode gaps on length of active zone of electrogenerating channel are calculated.
Keywords: loop channel, thermoemissive electrogenerating channel, heat electrophysical parameters of electrogenerating channel, cesium vapor-pressure gradient, temperature of supporting pipe, technique, local current-voltage characteristics.

Calculation estimate of radiation parameters of simulating installation «Trans-4-1»

Yu.G. Bazaka, E.Yu. Bahmatov, S.V. Vdovin, D.V. Koynov, A.I. Rymar, S.S. Ulkin

The application, operating principle and constructional features of simulating installation of «Trans-4-1» are described.  The thickness influence of tantalum foil converter on radiation parameters of simulating installation «TRANS-4-1» is researched.  Results of calculation of spectral and dose radiation characteristics generated by tantalum foil converter of optimum thickness, in volume of installation vacuum chamber are presented.
Keywords: tests, resistance, simulating installation, exposure dose.

Determination of fluence of neutrons with energies more than 0,1 MeV on research reactors

G.L. Pikalov, I.S. Krasnokutsky

Definition algorithms of fluence of neutrons with energies more than 0,1 MeV by means of sulfuric and sodium activation detectors, considering known regularities of spatial and energetic distribution of neutrons in reactor locations are given.
Keywords: activation detectors, research reactors, fluence of neutrons.

RAPID-2 – a new source of bremsstrahlung of mega ampere class

N.M. Vagina, A.M. Gafarov, V.B. Bychkov, A.V. Komissarov, A.V. Vlasova, A.A. Sidorenko

Results of the first experiments on RAPID-2 accelerator created on the basis of reactance-capacity energy storage with plasma flow switch are presented. As accelerator loading can be used diode tube with wide or focused electron beam for generation of bremsstrahlung pulses. Some experiments are carried out at charge voltage of two-stage pulse generator component 50 % from the project. As system of pulse shaping was used one general plasma flow switch. Distribution of exposition doses by accelerator operation on the multi-channel diode tube of ~100 cm² behind a steel total-absorption target 6 mm thick is received.
Keywords: RAPID-2 accelerator, experiment, bremsstrahlung.

Reference field on nuclear reactor PRIZ-M

D.V. Koynov, G.L. Pikalov, I.S. Tereshkin, A.N. Yagovkin

Characteristics of reference field on reactor PRIZ-M are given, certified for energy spectrum and neutron flux density, the absorbed doses of neutron and gamma radiations, and also the algorithm of unit transfer of physical quantities from reference field to working fields.
Keywords: reference field, reactor, gamma radiation, neutrons, energy spectrum, dose, flux density, detectors.

Irradiation installation OR-M for researches of equipment radiation resistance to neutron and gamma radiation influence of nuclear reactor

V.G. Madeev, E.I. Uksusov, I.V. Cheshigin, T.M. Badretdinov, A.S. Degtyarev

The list of the directions of researches on irradiation installation OR-M of NRC «Kurchatov Institute» with the specialized reactor OR as a source of neutrons and gamma radiation is presented. The general description of installation, her irradiation cavity, and also technology equipment and the radiometric complex, allowing experimental to research the radiation influence on large-size units of electronic systems are given.
Keywords: OR-M installation, nuclear reactor OR, irradiation cavity, collimator, wide beam filter, radiometric complex, neutron fields, gamma radiation.

Measurement of variations of Doppler frequency shift of satellite signals by NI PXI platform

S.T. Buy, A.G. Chensky, A.S. Poletaev

The ionosphere monitoring system by method of continuous electromagnetic transmission probing by satellite signals is offered. The main characteristics of received satellite signals and the description of measuring complex are presented. The use of NI PXI platform and LabVIEW software for development easier of this system is justified. Measurements and calculation of Doppler frequency shift of satellite signals are resulted.
Keywords: ionosphere, continuous electromagnetic transmission probing, Doppler frequency shift, satellite, PXI, LABVIEW.

Estimation of dispersion of radiation response of bipolar transistors at neutron radiation

V.P. Shukaylo, V.P. Pudov, O.V. Tkachev, S.M. Dubrovsky, T.V. Kupyrina, A.G. Berezovsky

On example of three types of bipolar transistors by total quantity of 1200 pieces it is shown that the dispersion of coefficient of radiation sensitivity at neutron radiation can be described by normal distribution, thus with confidence probability 0,95 this coefficient can differ on ±100%.
Keywords: transistor, estimation, coefficient of radiation sensitivity.

Periodic and sporadic changes of beta decays speed by long-term observations

A.G. Parhomov

The results received on multi-channel installation, created for research of different processes, including alpha and beta decays, in combination with record of environmental parameters are presented. The installation works practically continuously more than 15 years. At measurement of counting rate of beta sources ⁶⁰Co and ⁹⁰Sr-⁹⁰Y rhythmic changes with amplitude about 0,1 % from average value and the period 1 year and 0,01 % with periods about one month are found. Rhythmic changes of counting rate of alpha source ²³⁹Pu are not detected. The received results are compared with similar results of other researchers who have found at long measurements the periodic changes of beta radioactivity ³H, ⁵⁶Mn, ³²Si, ³⁶Cl, ⁶⁰Со, ¹³⁷Cs, ²²⁶Ra. When scanning the celestial sphere by telescope reflector with beta radioactive source at focus point the strong bursts of counting rate are registered.
Keywords: beta decays, alpha decays, periodic changes, bursts.