18 research outputs found

    Experimental complex for investigation of construction materials on the helium ions linear accelerator

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    The paper describes the experimental complex for the helium ions linear accelerator consisting of an irradiation chamber, sensors, analog signal converters (ADC) and a computer with a program for processing experimental data and then outputting it to a display. The complex is intended for carrying out experimental works on the study of the physical properties of structural materials used in nuclear power plants and nuclear fusion reactors. The complex was tested under the irradiation of titanium dioxide (TiOβ‚‚) with helium ions energies of 0.12 and 4 MeV. The experimental data of the TiOβ‚‚ electrophysical characteristics are presented, which confirm the expediency of using the complex to study the properties of materials used in high-power radiation fields.НавСдСно опис Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ комплСксу Π»Ρ–Π½Ρ–ΠΉΠ½ΠΎΠ³ΠΎ ΠΏΡ€ΠΈΡΠΊΠΎΡ€ΡŽΠ²Π°Ρ‡Π° Ρ–ΠΎΠ½Ρ–Π² Π³Π΅Π»Ρ–ΡŽ, Ρ‰ΠΎ ΡΠΊΠ»Π°Π΄Π°Ρ”Ρ‚ΡŒΡΡ Π· ΠΊΠ°ΠΌΠ΅Ρ€ΠΈ опромінСння, Π΄Π°Ρ‚Ρ‡ΠΈΠΊΡ–Π², ΠΊΠΎΠ½Π²Π΅Ρ€Ρ‚Π΅Ρ€Ρ–Π² сигналів (АЦП) Ρ– Π•ΠžΠœ Π· ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΎΡŽ ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΈ Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΈΡ… Π΄Π°Π½ΠΈΡ… Π· подальшим відобраТСнням Ρ—Ρ… Π½Π° дисплСї. КомплСкс ΠΏΡ€ΠΈΠ·Π½Π°Ρ‡Π΅Π½ΠΈΠΉ для провСдСння Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΈΡ… Ρ€ΠΎΠ±Ρ–Ρ‚ Π· вивчСння Ρ„Ρ–Π·ΠΈΡ‡Π½ΠΈΡ… властивостСй конструкційних ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ–Π², Ρ‰ΠΎ Π·Π°ΡΡ‚ΠΎΡΠΎΠ²ΡƒΡŽΡ‚ΡŒΡΡ Π½Π° АЕБ Ρ– Π’Π―Π . ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ тСстування комплСксу ΠΏΡ€ΠΈ ΠΎΠΏΡ€ΠΎΠΌΡ–Π½Π΅Π½Π½Ρ– двоокису Ρ‚ΠΈΡ‚Π°Π½Ρƒ (TiOβ‚‚) Ρ–ΠΎΠ½Π°ΠΌΠΈ Π³Π΅Π»Ρ–ΡŽ Π· СнСргіями 0,12 Ρ– 4 ΠœΠ΅Π’. НавСдСно Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ– Π΄Π°Π½Ρ– Π΅Π»Π΅ΠΊΡ‚Ρ€ΠΎΡ„Ρ–Π·ΠΈΡ‡Π½ΠΈΡ… характСристик TiOβ‚‚, Ρ‰ΠΎ ΠΏΡ–Π΄Ρ‚Π²Π΅Ρ€Π΄ΠΆΡƒΡŽΡ‚ΡŒ Π΄ΠΎΡ†Ρ–Π»ΡŒΠ½Ρ–ΡΡ‚ΡŒ використання комплСксу для вивчСння властивостСй ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ–Π², Ρ‰ΠΎ Π·Π°ΡΡ‚ΠΎΡΠΎΠ²ΡƒΡŽΡ‚ΡŒΡΡ Π² ΡƒΠΌΠΎΠ²Π°Ρ… ΠΏΠΎΡ‚ΡƒΠΆΠ½ΠΈΡ… Ρ€Π°Π΄Ρ–Π°Ρ†Ρ–ΠΉΠ½ΠΈΡ… ΠΏΠΎΠ»Ρ–Π².ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½ΠΎ описаниС ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎΠ³ΠΎ комплСкса Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠ³ΠΎ ускоритСля ΠΈΠΎΠ½ΠΎΠ² гСлия, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΉ состоит ΠΈΠ· ΠΊΠ°ΠΌΠ΅Ρ€Ρ‹ облучСния, Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠΎΠ², ΠΊΠΎΠ½Π²Π΅Ρ€Ρ‚Π΅Ρ€ΠΎΠ² сигналов (АЦП) ΠΈ Π­Π’Πœ с ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠΎΠΉ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠΈ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… Π΄Π°Π½Π½Ρ‹Ρ… с ΠΏΠΎΡΠ»Π΅Π΄ΡƒΡŽΡ‰ΠΈΠΌ ΠΎΡ‚ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠ΅ΠΌ ΠΈΡ… Π½Π° дисплСС. КомплСкс ΠΏΡ€Π΅Π΄Π½Π°Π·Π½Π°Ρ‡Π΅Π½ для провСдСния ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… Ρ€Π°Π±ΠΎΡ‚ ΠΏΠΎ ΠΈΠ·ΡƒΡ‡Π΅Π½ΠΈΡŽ физичСских свойств конструкционных ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ², примСняСмых Π½Π° АЭБ ΠΈ Π’Π―Π . ΠŸΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ тСстированиС комплСкса ΠΏΡ€ΠΈ ΠΎΠ±Π»ΡƒΡ‡Π΅Π½ΠΈΠΈ двуокиси Ρ‚ΠΈΡ‚Π°Π½Π° (TiOβ‚‚) ΠΈΠΎΠ½Π°ΠΌΠΈ гСлия с энСргиями 0,12 ΠΈ 4 ΠœΡΠ’. ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Π΅ Π΄Π°Π½Π½Ρ‹Π΅ элСктрофизичСских характСристик TiOβ‚‚, ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π°ΡŽΡ‰ΠΈΠ΅ Ρ†Π΅Π»Π΅ΡΠΎΠΎΠ±Ρ€Π°Π·Π½ΠΎΡΡ‚ΡŒ использования комплСкса для изучСния свойств ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ², примСняСмых Π² условиях ΠΌΠΎΡ‰Π½Ρ‹Ρ… Ρ€Π°Π΄ΠΈΠ°Ρ†ΠΈΠΎΠ½Π½Ρ‹Ρ… ΠΏΠΎΠ»Π΅ΠΉ

    Beam and target parameters measurement system on helium ions linear accelerator

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    A system for measuring beam and target parameters on helium ions linear accelerator is presented. The measurement system consists of sensors set, signal converters and computer with codes for processing experimental data. The measurement system is designed for recording, visualizing, storing and processing data directly when samples are irradiated with helium ions with energies of 0.12…4 MeV. The sample temperature, the ion beam current and its shape, the sample tilt angle to the beam axis, the irradiation dose, the ionization, damage and helium range profiles are measured/calculated.НавСдСно опис систСми Π²ΠΈΠΌΡ–Ρ€ΡŽΠ²Π°Π½Π½Ρ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ–Π² ΠΏΡƒΡ‡ΠΊΠ° Ρ– ΠΌΡ–ΡˆΠ΅Π½Ρ– Π½Π° Π»Ρ–Π½Ρ–ΠΉΠ½ΠΎΠΌΡƒ ΠΏΡ€ΠΈΡΠΊΠΎΡ€ΡŽΠ²Π°Ρ‡Ρ– Ρ–ΠΎΠ½Ρ–Π² Π³Π΅Π»Ρ–ΡŽ. БистСма Π²ΠΈΠΌΡ–Ρ€ΡŽΠ²Π°Π½ΡŒ ΡΠΊΠ»Π°Π΄Π°Ρ”Ρ‚ΡŒΡΡ Π· Π½Π°Π±ΠΎΡ€Ρƒ Π΄Π°Ρ‚Ρ‡ΠΈΠΊΡ–Π², ΠΊΠΎΠ½Π²Π΅Ρ€Ρ‚Π΅Ρ€Ρ–Π² сигналів Ρ– Π•ΠžΠœ Π· ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΎΡŽ ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΈ Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΈΡ… Π΄Π°Π½ΠΈΡ…. БистСма Π²ΠΈΠΌΡ–Ρ€ΡŽΠ²Π°Π½ΡŒ ΠΏΡ€ΠΈΠ·Π½Π°Ρ‡Π΅Π½Π° для рСєстрації, Π²Ρ–Π·ΡƒΠ°Π»Ρ–Π·Π°Ρ†Ρ–Ρ—, збСрСТСння Ρ– ΠΎΠ±Ρ€ΠΎΠ±ΠΊΠΈ Π΄Π°Π½ΠΈΡ… Π±Π΅Π·ΠΏΠΎΡΠ΅Ρ€Π΅Π΄Π½ΡŒΠΎ ΠΏΡ€ΠΈ ΠΎΠΏΡ€ΠΎΠΌΡ–Π½Π΅Π½Π½Ρ– Π·Ρ€Π°Π·ΠΊΡ–Π² Ρ–ΠΎΠ½Π°ΠΌΠΈ Π³Π΅Π»Ρ–ΡŽ Π· СнСргіями 0,12…4 ΠœΠ΅Π’. Π’ΠΈΠΌΡ–Ρ€ΡŽΡŽΡ‚ΡŒΡΡ/ΠΎΠ±Ρ‡ΠΈΡΠ»ΡŽΡŽΡ‚ΡŒΡΡ: Ρ‚Π΅ΠΌΠΏΠ΅Ρ€Π°Ρ‚ΡƒΡ€Π° Π·Ρ€Π°Π·ΠΊΠ°, струм Ρ– Ρ„ΠΎΡ€ΠΌΠ° струму ΠΏΡƒΡ‡ΠΊΠ° Ρ–ΠΎΠ½Ρ–Π² Π½Π° Π·Ρ€Π°Π·ΠΊΡƒ, ΠΊΡƒΡ‚ Π½Π°Ρ…ΠΈΠ»Ρƒ Π·Ρ€Π°Π·ΠΊΠ° Π΄ΠΎ осі ΠΏΡƒΡ‡ΠΊΠ°, Π΄ΠΎΠ·Π° опромінСння, ΠΏΡ€ΠΎΡ„Ρ–Π»Ρ– Ρ–ΠΎΠ½Ρ–Π·Π°Ρ†Ρ–Ρ—, ΠΏΠΎΡˆΠΊΠΎΠ΄ΠΆΡƒΠ²Π°Π½ΠΎΡΡ‚Ρ– Ρ– залягання Π³Π΅Π»Ρ–ΡŽ Π² Π·Ρ€Π°Π·ΠΊΡƒ.ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½ΠΎ описаниС систСмы измСрСния ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² ΠΏΡƒΡ‡ΠΊΠ° ΠΈ мишСни Π½Π° Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΌ ускоритСлС ΠΈΠΎΠ½ΠΎΠ² гСлия. БистСма ΠΈΠ·ΠΌΠ΅Ρ€Π΅Π½ΠΈΠΉ состоит ΠΈΠ· Π½Π°Π±ΠΎΡ€Π° Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠΎΠ², ΠΊΠΎΠ½Π²Π΅Ρ€Ρ‚Π΅Ρ€ΠΎΠ² сигналов ΠΈ Π­Π’Πœ с ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠΎΠΉ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠΈ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… Π΄Π°Π½Π½Ρ‹Ρ…. БистСма ΠΈΠ·ΠΌΠ΅Ρ€Π΅Π½ΠΈΠΉ ΠΏΡ€Π΅Π΄Π½Π°Π·Π½Π°Ρ‡Π΅Π½Π° для рСгистрации, Π²ΠΈΠ·ΡƒΠ°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ, сохранСния ΠΈ ΠΎΠ±Ρ€Π°Π±ΠΎΡ‚ΠΊΠΈ Π΄Π°Π½Π½Ρ‹Ρ… нСпосрСдствСнно ΠΏΡ€ΠΈ ΠΎΠ±Π»ΡƒΡ‡Π΅Π½ΠΈΠΈ ΠΎΠ±Ρ€Π°Π·Ρ†ΠΎΠ² ΠΈΠΎΠ½Π°ΠΌΠΈ гСлия с энСргиями 0,12…4 ΠœΡΠ’. Π˜Π·ΠΌΠ΅Ρ€ΡΡŽΡ‚ΡΡ/Π²Ρ‹Ρ‡ΠΈΡΠ»ΡΡŽΡ‚ΡΡ: Ρ‚Π΅ΠΌΠΏΠ΅Ρ€Π°Ρ‚ΡƒΡ€Π° ΠΎΠ±Ρ€Π°Π·Ρ†Π°, Ρ‚ΠΎΠΊ ΠΈ Ρ„ΠΎΡ€ΠΌΠ° Ρ‚ΠΎΠΊΠ° ΠΏΡƒΡ‡ΠΊΠ° ΠΈΠΎΠ½ΠΎΠ² Π½Π° ΠΎΠ±Ρ€Π°Π·Ρ†Π΅, ΡƒΠ³ΠΎΠ» Π½Π°ΠΊΠ»ΠΎΠ½Π° ΠΎΠ±Ρ€Π°Π·Ρ†Π° ΠΊ оси ΠΏΡƒΡ‡ΠΊΠ°, Π΄ΠΎΠ·Π° облучСния, ΠΏΡ€ΠΎΡ„ΠΈΠ»ΠΈ ΠΈΠΎΠ½ΠΈΠ·Π°Ρ†ΠΈΠΈ, поврСТдаСмости ΠΈ залСгания гСлия Π² ΠΎΠ±Ρ€Π°Π·Ρ†Π΅

    Reminder effects: the molecular cascade following a reminder in young chicks does not recapitulate that following training on a passive avoidance task

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    Memory traces, once established, are no longer sensitive to disruption by metabolic inhibitors. However, memories reactivated by reminder are once again vulnerable, in a time-dependent manner, to amnestic treatment. To determine whether the metabolic events following a reminder recapitulate those following initial training we examined the temporal dynamics of amnesia induced by the protein synthesis inhibitor anisomycin and the glycosylation inhibitor 2-deoxygalactose. The effects of both were transient and dependent on time of reminder post-training and time of injection relative to reminder, and differed from those following initial training. 2-[C-14]-deoxyglucose uptake increased in two brain regions, the intermediate medial hyperstriatum ventrale (IMHV) and lobus parolfactorius (LPO) following reminder as it did following training, but the increase was bilateral rather than confined to the left hemisphere and was more marked in LPO than IMHV. C-fos expression after reminder was increased only in the LPO, the chick brain region associated with a late phase of memory processing and recall. Thus although, like initial consolidation, memory processing after reminder is sensitive to inhibitors of protein synthesis and glycosylation, the temporal and pharmacological dynamics indicate differences between these two processes

    Air-guided photonic-crystal-fiber pulse-compression delivery of multimegawatt femtosecond laser output for nonlinear-optical imaging and neurosurgery

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    Large-core hollow photonic-crystal fibers (PCFs) are shown to enable a fiber-format air-guided delivery of ultrashort infrared laser pulses for neurosurgery and nonlinear-optical imaging. With an appropriate dispersion precompensation, an anomalously dispersive 15-m-core hollow PCF compresses 510-fs, 1070-nm light pulses to a pulse width of about 110 fs, providing a peak power in excess of 5 MW. The compressed PCF output is employed to induce a local photodisruption of corpus callosum tissues in mouse brain and is used to generate the third harmonic in brain tissues, which is captured by the PCF and delivered to a detector through the PCF cladding. Β© 2012 American Institute of Physics
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