Pub Date : 2024-06-28DOI: 10.1134/s0020441224700039
V. I. Alekseev, V. A. Baskov, E. A. Varfolomeeva, V. A. Dronov, A. I. L’vov, A. V. Kolzov, Yu. F. Krechetov, V. V. Poliansky, S. S. Sidorin
Abstract
The characteristics of a 50-cm-long module of the scintillation time-of-flight hodoscope have been studied. It has been determined that the coordinate resolution and detection efficiency of the module depend on the voltages applied to the voltage dividers of the photomultiplier tubes and the distance from the hip point of a particle to the photomultiplier tubes. The module has been tested using both a secondary electron beam of the Pakhra accelerator (Lebedev Physical Institute, Russian Academy of Sciences) with an energy of 20 MeV and a 90Sr+90Y radioactive source. The tests show that the minimum values of the coordinate resolution are σx ≈ 0.1 and 1.3 cm, respectively, and the detection efficiency is ε ≈ 53%.
{"title":"A Scintillation Time-of-Flight Hodoscope","authors":"V. I. Alekseev, V. A. Baskov, E. A. Varfolomeeva, V. A. Dronov, A. I. L’vov, A. V. Kolzov, Yu. F. Krechetov, V. V. Poliansky, S. S. Sidorin","doi":"10.1134/s0020441224700039","DOIUrl":"https://doi.org/10.1134/s0020441224700039","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The characteristics of a 50-cm-long module of the scintillation time-of-flight hodoscope have been studied. It has been determined that the coordinate resolution and detection efficiency of the module depend on the voltages applied to the voltage dividers of the photomultiplier tubes and the distance from the hip point of a particle to the photomultiplier tubes. The module has been tested using both a secondary electron beam of the Pakhra accelerator (Lebedev Physical Institute, Russian Academy of Sciences) with an energy of 20 MeV and a <sup>90</sup>Sr+<sup>90</sup>Y radioactive source. The tests show that the minimum values of the coordinate resolution are σ<sub><i>x</i></sub> ≈ 0.1 and 1.3 cm, respectively, and the detection efficiency is ε ≈ 53%.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700143
V. N. Evdokimov
Abstract—
The long-term stability of counters consisting of extruded-scintillator strips and wavelength-shifting fibers was studied. The aging study was carried out for scintillators and wavelength-shifting fibers before starting the mass production of counters. Aging at a higher rate and higher temperatures was used in the study, which was then continued as an interesting R&D work. The decrease in the light yield was at a level of 3% per year during an initial 5–6 years. The aging then proceeds slower and nearly ceases after a 26% decrease over 20 years. The study of preliminarily aged samples was repeated after a 2.5-year pause; it showed that the aging rate for these scintillators was less than 0.5% per year at 20°C. The results obtained over 4.5 years by direct measurements and by using a faster-aging technology were in good agreement.
{"title":"A Long-Term Stability Study of Counters Consisting of Extruded-Scintillator Strips and Wavelength-Shifting Fibers","authors":"V. N. Evdokimov","doi":"10.1134/s0020441224700143","DOIUrl":"https://doi.org/10.1134/s0020441224700143","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract—</h3><p>The long-term stability of counters consisting of extruded-scintillator strips and wavelength-shifting fibers was studied. The aging study was carried out for scintillators and wavelength-shifting fibers before starting the mass production of counters. Aging at a higher rate and higher temperatures was used in the study, which was then continued as an interesting R&D work. The decrease in the light yield was at a level of 3% per year during an initial 5–6 years. The aging then proceeds slower and nearly ceases after a 26% decrease over 20 years. The study of preliminarily aged samples was repeated after a 2.5-year pause; it showed that the aging rate for these scintillators was less than 0.5% per year at 20°C. The results obtained over 4.5 years by direct measurements and by using a faster-aging technology were in good agreement.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700088
M. N. Vasiliev, T. M. Vasilieva
Abstract
A description of the setup for demonstration and educational experiments developed at the Moscow Institute of Physics and Technology, which illustrates the physical phenomena that occur during plasma generation by injection of electron beams into dense gaseous media and aerosols, is given. The setup is equipped with a multifunctional working chamber with a set of interchangeable units able to demonstrate various effects observed when an electron-beam plasma interacts with matter within a wide range of conditions. Specially developed hardware and software control the operation of the unit and diagnostic tools ensuring the accumulation and computer processing of primary data and maintain the compatibility of the equipment with standard and specially designed visualization systems, which makes it possible to use the setup for demonstrations both offline and online.
{"title":"Multifunctional Setup for Demonstration Experiments on the Physics and Technology of Electron-Beam Plasma","authors":"M. N. Vasiliev, T. M. Vasilieva","doi":"10.1134/s0020441224700088","DOIUrl":"https://doi.org/10.1134/s0020441224700088","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A description of the setup for demonstration and educational experiments developed at the Moscow Institute of Physics and Technology, which illustrates the physical phenomena that occur during plasma generation by injection of electron beams into dense gaseous media and aerosols, is given. The setup is equipped with a multifunctional working chamber with a set of interchangeable units able to demonstrate various effects observed when an electron-beam plasma interacts with matter within a wide range of conditions. Specially developed hardware and software control the operation of the unit and diagnostic tools ensuring the accumulation and computer processing of primary data and maintain the compatibility of the equipment with standard and specially designed visualization systems, which makes it possible to use the setup for demonstrations both offline and online.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700210
S. V. Logvinenko
Abstract—
A multichannel signal recording system (MSRS) developed for the 128-beam LPA radio telescope of PRAO ASC LPI is described. The signals coming from the radio telescope are RF signals in the frequency range of 0–115 MHz with a 2.5-MHz-wide telescope operating band located in the range of 109.0–111.5 MHz. Digitization of each signal is carried out by direct sampling at a frequency of 230 MHz with further fully digital signal processing. Processing includes transfer of the operating band towards the low-frequency region, suppression of the signal outside the operating band, and division of the useful signal into 512 spectral channels using a complex Fourier processor. All processing is performed on the basis of field-programmable gate arrays located on base modules that were specially developed by PRAO and placed in slots of industrial computers. The spectrum sequences are then transferred to the computer RAM for the recording program and then are written in a required format on a hard disk. The use of the combined hardware and software processing has made it possible to develop a compact, reliable, and inexpensive recording system. The MSRS created specifically for the LPA radio telescope is unique.
{"title":"Signal Recording System of the Multibeam LPA Radio Telescope at the PRAO ASC LPI","authors":"S. V. Logvinenko","doi":"10.1134/s0020441224700210","DOIUrl":"https://doi.org/10.1134/s0020441224700210","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract—</h3><p>A multichannel signal recording system (MSRS) developed for the 128-beam LPA radio telescope of PRAO ASC LPI is described. The signals coming from the radio telescope are RF signals in the frequency range of 0–115 MHz with a 2.5-MHz-wide telescope operating band located in the range of 109.0–111.5 MHz. Digitization of each signal is carried out by direct sampling at a frequency of 230 MHz with further fully digital signal processing. Processing includes transfer of the operating band towards the low-frequency region, suppression of the signal outside the operating band, and division of the useful signal into 512 spectral channels using a complex Fourier processor. All processing is performed on the basis of field-programmable gate arrays located on base modules that were specially developed by PRAO and placed in slots of industrial computers. The spectrum sequences are then transferred to the computer RAM for the recording program and then are written in a required format on a hard disk. The use of the combined hardware and software processing has made it possible to develop a compact, reliable, and inexpensive recording system. The MSRS created specifically for the LPA radio telescope is unique.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700040
V. F. Batyaev, S. G. Belichenko, M. D. Karetnikov, A. D. Maznitsin, A. Yu. Presnyakov
Abstract—
The principles of the layout and operation of data-acquisition electronics for tagged neutron technology are described. They are based on the selection of useful events according to specified criteria with data acquisition by a buffer memory unit and subsequent transfer of data arrays to a remote computer for processing and visualization. The main selection criterion is the presence of signals from the α and γ detectors in specified time intervals and amplitude ranges in the absence of overlapping events. By using a backbone−modular architecture, it is possible to carry out parallel signal processing and data transmission at several levels, which allows connection of almost any number of γ detectors without losing measurement accuracy and data integrity. A model of the setup has been produced for testing the developed equipment, and experiments were conducted to study its characteristics. The experimentally achieved data-transfer rate (for α−γ coincidences) is 3 × 105 s−1, which is several times higher than the maximum transfer rate of existing data-acquisition systems for the tagged neutron technology.
{"title":"Data-Acquisition System of a Multidetector Device with Tagged Neutrons with Parallel Transmission of Events","authors":"V. F. Batyaev, S. G. Belichenko, M. D. Karetnikov, A. D. Maznitsin, A. Yu. Presnyakov","doi":"10.1134/s0020441224700040","DOIUrl":"https://doi.org/10.1134/s0020441224700040","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract—</h3><p>The principles of the layout and operation of data-acquisition electronics for tagged neutron technology are described. They are based on the selection of useful events according to specified criteria with data acquisition by a buffer memory unit and subsequent transfer of data arrays to a remote computer for processing and visualization. The main selection criterion is the presence of signals from the α and γ detectors in specified time intervals and amplitude ranges in the absence of overlapping events. By using a backbone−modular architecture, it is possible to carry out parallel signal processing and data transmission at several levels, which allows connection of almost any number of γ detectors without losing measurement accuracy and data integrity. A model of the setup has been produced for testing the developed equipment, and experiments were conducted to study its characteristics. The experimentally achieved data-transfer rate (for α−γ coincidences) is 3 × 10<sup>5</sup> s<sup>−1</sup>, which is several times higher than the maximum transfer rate of existing data-acquisition systems for the tagged neutron technology.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700064
E. Yu. Burkin, V. V. Sviridov, A. A. Bombizov
Abstract
A power supply system for an unmanned aerial vehicle (UAV) based on a cable connection with a primary source of electrical energy located on the earth’s surface is described. The ground power source from a standard three-phase network generates a galvanically isolated, constant output voltage that varies in the range of 350–435 V with an average electric power of up to 10 kW. A circuit based on a step-down type pulse current stabilizer with a subsequent link of a current inverter, a matching transformer, and a rectifier was used. The voltage of the ground power source is fed through the cable-rope to the UAV. The UAV power supply lowers the output voltage to 48 ± 2 V, with an output current of up to 135 A. Experimental data on the operation of the system on a load equivalent and UAVs are presented.
{"title":"Power Supply System of a Tethered Unmanned Aerial Vehicle","authors":"E. Yu. Burkin, V. V. Sviridov, A. A. Bombizov","doi":"10.1134/s0020441224700064","DOIUrl":"https://doi.org/10.1134/s0020441224700064","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A power supply system for an unmanned aerial vehicle (UAV) based on a cable connection with a primary source of electrical energy located on the earth’s surface is described. The ground power source from a standard three-phase network generates a galvanically isolated, constant output voltage that varies in the range of 350–435 V with an average electric power of up to 10 kW. A circuit based on a step-down type pulse current stabilizer with a subsequent link of a current inverter, a matching transformer, and a rectifier was used. The voltage of the ground power source is fed through the cable-rope to the UAV. The UAV power supply lowers the output voltage to 48 ± 2 V, with an output current of up to 135 A. Experimental data on the operation of the system on a load equivalent and UAVs are presented.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700258
N. P. Semena, Yu. S. Dobrolenskiy, D. V. Serbinov, N. A. Vyazovetskiy, F. G. Martynovich
Abstract
The experimental results of measurements of the thermal conductivity of standard multilayer insulation (MLI) in vacuum and under conditions simulating the Martian atmosphere are presented. These measurements have shown that the thermal conductivity becomes approximately one third higher when the insulation moves from vacuum into the Martian atmosphere. The obtained results make it possible to correctly determine the heating power of MLI-coated instruments on the Martian surface and, thus, to use the standard MLI during both the flight period and operations on Mars’s surface. The MLI-coated ISEM instrument, which was a part of the Pasteur payload of the cancelled ExoMars-2022 mission, was used as an object of the experiment.
摘要 介绍了在真空和模拟火星大气的条件下测量标准多层绝缘（MLI）导热性的实验结果。这些测量结果表明，当隔热材料从真空进入火星大气层时，其热导率会提高约三分之一。所获得的结果使我们能够正确确定火星表面 MLI 涂层仪器的加热功率，从而在飞行期间和火星表面运行期间使用标准 MLI。已被取消的 ExoMars-2022 飞行任务中的巴斯德有效载荷的一部分--MLI 涂层 ISEM 仪器被用作实验对象。
{"title":"Thermal Conductivity of Multilayer Insulation in the Martian Atmosphere","authors":"N. P. Semena, Yu. S. Dobrolenskiy, D. V. Serbinov, N. A. Vyazovetskiy, F. G. Martynovich","doi":"10.1134/s0020441224700258","DOIUrl":"https://doi.org/10.1134/s0020441224700258","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The experimental results of measurements of the thermal conductivity of standard multilayer insulation (MLI) in vacuum and under conditions simulating the Martian atmosphere are presented. These measurements have shown that the thermal conductivity becomes approximately one third higher when the insulation moves from vacuum into the Martian atmosphere. The obtained results make it possible to correctly determine the heating power of MLI-coated instruments on the Martian surface and, thus, to use the standard MLI during both the flight period and operations on Mars’s surface. The MLI-coated ISEM instrument, which was a part of the Pasteur payload of the cancelled ExoMars-2022 mission, was used as an object of the experiment.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700155
P. P. Kiziridi, G. E. Ozur
Abstract
The energy density distribution of a radially converging low-energy (up to 25 keV) high-current electron beam has been measured using a sectioned three-channel calorimeter. The beam formation was performed using a two-sectioned cathode assembly. Eighteen resistively decoupled arc plasma sources triggered by a breakdown over the dielectric surface were built in the 4-cm-radius ring cathode of each section. The distance between the centers of sections was 4 cm. Measurements were performed both in the vacuum-diode mode (a pressure of residual gases of 0.006 Pa) and in the gas-filled diode mode (argon at a pressure of 0.08 Pa). It has been shown that the energy density in the central part of the beam is higher by 25–30% on average than in its peripheral parts; this can be acceptable for solving many tasks of surface modification of metals and alloys. Lifetime tests of the cathode assembly have shown its operation stability for 50 000 pulses in minimum.
{"title":"Energy Density Distribution in the Cross Section of a Radially Converging Low-Energy High-Current Electron Beam","authors":"P. P. Kiziridi, G. E. Ozur","doi":"10.1134/s0020441224700155","DOIUrl":"https://doi.org/10.1134/s0020441224700155","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The energy density distribution of a radially converging low-energy (up to 25 keV) high-current electron beam has been measured using a sectioned three-channel calorimeter. The beam formation was performed using a two-sectioned cathode assembly. Eighteen resistively decoupled arc plasma sources triggered by a breakdown over the dielectric surface were built in the 4-cm-radius ring cathode of each section. The distance between the centers of sections was 4 cm. Measurements were performed both in the vacuum-diode mode (a pressure of residual gases of 0.006 Pa) and in the gas-filled diode mode (argon at a pressure of 0.08 Pa). It has been shown that the energy density in the central part of the beam is higher by 25–30% on average than in its peripheral parts; this can be acceptable for solving many tasks of surface modification of metals and alloys. Lifetime tests of the cathode assembly have shown its operation stability for 50 000 pulses in minimum.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700246
M. M. Rychkov, V. V. Kaplin, V. A. Smolyanskiy
Abstract
Experimental results of determining the resolution of radiography using the bremsstrahlung from the improved compact SEA-7 betatron with electron energy of 7 MeV are presented. Measurements were made using AGFA NDT D4 PbVacuPac X-ray films and Duplex IQI image quality indicator (model EN 462-5). The obtained results demonstrate a different resolution (approximately 0.16 mm) of thin wire pairs of the indicator in different areas of the radiation cone, i.e., a different horizontal size of the effective radiation focus (approximately 0.2 mm), which must be taken into account when analyzing radiographic images of real objects. The vertical size of the radiation focus (approximately 1.4 mm), which is perpendicular to the plane of the electron orbit, was also estimated.
{"title":"Spatial Resolution of Images and Effective Focus Size of Bremsstrahlung of an Improved Compact Betatron SEA-7 with Electron Energy of 7 MeV","authors":"M. M. Rychkov, V. V. Kaplin, V. A. Smolyanskiy","doi":"10.1134/s0020441224700246","DOIUrl":"https://doi.org/10.1134/s0020441224700246","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Experimental results of determining the resolution of radiography using the bremsstrahlung from the improved compact SEA-7 betatron with electron energy of 7 MeV are presented. Measurements were made using AGFA NDT D4 PbVacuPac X-ray films and Duplex IQI image quality indicator (model EN 462-5). The obtained results demonstrate a different resolution (approximately 0.16 mm) of thin wire pairs of the indicator in different areas of the radiation cone, i.e., a different horizontal size of the effective radiation focus (approximately 0.2 mm), which must be taken into account when analyzing radiographic images of real objects. The vertical size of the radiation focus (approximately 1.4 mm), which is perpendicular to the plane of the electron orbit, was also estimated.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-28DOI: 10.1134/s0020441224700209
T. M. Kuznetsova, A. M. Berezov, V. A. Zagryadskii, K. A. Makoveeva, T. Yu. Malamut, V. I. Novikov, A. V. Ryzhkov
Abstract
This work has been carried out as a part of the study aimed at creating a therapeutic in vivo 103Pd/103mRh generator of Auger electrons. The 103Pd radionuclide can be produced in a metal rhodium target as a result of the Rh(p, n)103Pd or Rh(d, 2n)103Pd reaction. To extract 103Pd from the target, it is necessary that rhodium be transferred into solution, which is a rather intricate task. A laboratory setup and a technique for express dissolution of rhodium have been developed. This technique consists in alternating cycles of rhodium dissolution (~2.5 h) with an alternating current of 15 A and recovery with a direct current of 1 A (15 min). The technique for reducing rhodium metal from Rh solution in 6 M hydrochloric acid has been tested in order to include it in a closed 103Pd production cycle. The efficiency of the created laboratory setup is demonstrated using an example of the dissolution of a powder rhodium target irradiated with protons.
{"title":"A Laboratory Setup for Express Electrochemical Dissolution of a Powder Rhodium Target","authors":"T. M. Kuznetsova, A. M. Berezov, V. A. Zagryadskii, K. A. Makoveeva, T. Yu. Malamut, V. I. Novikov, A. V. Ryzhkov","doi":"10.1134/s0020441224700209","DOIUrl":"https://doi.org/10.1134/s0020441224700209","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work has been carried out as a part of the study aimed at creating a therapeutic in vivo <sup>103</sup>Pd/<sup>103m</sup>Rh generator of Auger electrons. The <sup>103</sup>Pd radionuclide can be produced in a metal rhodium target as a result of the Rh(<i>p</i>, <i>n</i>)<sup>103</sup>Pd or Rh(<i>d</i>, 2<i>n</i>)<sup>103</sup>Pd reaction. To extract <sup>103</sup>Pd from the target, it is necessary that rhodium be transferred into solution, which is a rather intricate task. A laboratory setup and a technique for express dissolution of rhodium have been developed. This technique consists in alternating cycles of rhodium dissolution (~2.5 h) with an alternating current of 15 A and recovery with a direct current of 1 A (15 min). The technique for reducing rhodium metal from Rh solution in 6 M hydrochloric acid has been tested in order to include it in a closed <sup>103</sup>Pd production cycle. The efficiency of the created laboratory setup is demonstrated using an example of the dissolution of a powder rhodium target irradiated with protons.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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