Pub Date : 2024-08-14DOI: 10.1134/s1547477124701000
D. V. Dementev, A. D. Sheremetev, M. O. Shitenkov, V. V. Leontiev, I. A. Rufanov, Yu. A. Murin
Abstract
The results of studying characteristics of modules based on double-sided microstrip silicon sensors, which are designed to create the wide-aperture Silicon Tracking System for the BM@N facility, are presented. The main module features are the use of fast readout electronics based on the STS-XYTER chip and the application of ultralight (0.23% X0) aluminum microcables for transmitting analog signals from the sensor strips to the input channels of the readout electronics. The results of testing different configurations of tracking modules on the extracted beam of protons at the SC-1000 accelerator in the PNPI are presented. The stable operation of readout electronics is demonstrated at loads close to the maximum values of 360 kHz s–1 cm–2. The signal-to-noise ratio was no less than 23. The measured coordinate resolution of the modules within the beam telescope was 17 ± 0.4 μm, and the detector efficiency of recording for protons with energy of 1 GeV was no less than 99%.
{"title":"Characterization of Tracking Modules Based on DSSD Sensors at the SC-1000 Accelerator for the BM@N Project","authors":"D. V. Dementev, A. D. Sheremetev, M. O. Shitenkov, V. V. Leontiev, I. A. Rufanov, Yu. A. Murin","doi":"10.1134/s1547477124701000","DOIUrl":"https://doi.org/10.1134/s1547477124701000","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of studying characteristics of modules based on double-sided microstrip silicon sensors, which are designed to create the wide-aperture Silicon Tracking System for the BM@N facility, are presented. The main module features are the use of fast readout electronics based on the STS-XYTER chip and the application of ultralight (0.23% <i>X</i><sub>0</sub>) aluminum microcables for transmitting analog signals from the sensor strips to the input channels of the readout electronics. The results of testing different configurations of tracking modules on the extracted beam of protons at the SC-1000 accelerator in the PNPI are presented. The stable operation of readout electronics is demonstrated at loads close to the maximum values of 360 kHz s<sup>–1</sup> cm<sup>–2</sup>. The signal-to-noise ratio was no less than 23. The measured coordinate resolution of the modules within the beam telescope was 17 ± 0.4 μm, and the detector efficiency of recording for protons with energy of 1 GeV was no less than 99%.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124701024
Yu. N. Pepelyshev, A. V. Vinogradov, A. D. Rogov, D. Sumkhuu
Abstract
The IBR-2M reactor is scheduled for decommissioning at end of the 2030s. We propose, after the reactor is decommissioned, not to create an absolutely new neutron source, which would require significant R&D efforts, but use instead effective technical solutions tested at other fast neutron nuclear facilities, for example, IBR-2, IBR-2M, MBIR, BOR-60, BN-1200, etc. This is a conceptual vision of a new source, the tentative name of which is IBR-4. The study based on calculations for the so-called basic setup of the IBR-4 considers the fundamental feasibility of implementing effective technical solutions.
{"title":"Preliminary Computations for Pulsed Reactor IBR-4. Basic Design","authors":"Yu. N. Pepelyshev, A. V. Vinogradov, A. D. Rogov, D. Sumkhuu","doi":"10.1134/s1547477124701024","DOIUrl":"https://doi.org/10.1134/s1547477124701024","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The IBR-2M reactor is scheduled for decommissioning at end of the 2030s. We propose, after the reactor is decommissioned, not to create an absolutely new neutron source, which would require significant R&D efforts, but use instead effective technical solutions tested at other fast neutron nuclear facilities, for example, IBR-2, IBR-2M, MBIR, BOR-60, BN-1200, etc. This is a conceptual vision of a new source, the tentative name of which is IBR-4. The study based on calculations for the so-called basic setup of the IBR-4 considers the fundamental feasibility of implementing effective technical solutions.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124701309
I. A. Kishin, E. Yu. Kidanova, A. S. Kubankin, R. M. Nazhmudinov, V. I. Alexeev, A. N. Eliseev
Abstract
The paper presents experimental studies of parametric X-ray radiation produced by the interaction of relativistic electrons with powder targets and textured polycrystals. The difference in the obtained X-ray spectra is shown. The experimental data obtained are compared with values calculated according to the PXR kinematic theory.
摘要 本文介绍了相对论电子与粉末靶和纹理多晶体相互作用产生的参数 X 射线辐射的实验研究。研究显示了所获得的 X 射线光谱的差异。获得的实验数据与根据 PXR 运动学理论计算得出的数值进行了比较。
{"title":"The Difference between the Spectra of Parametric X-Ray Radiation from Powder Targets and Textured Polycrystals","authors":"I. A. Kishin, E. Yu. Kidanova, A. S. Kubankin, R. M. Nazhmudinov, V. I. Alexeev, A. N. Eliseev","doi":"10.1134/s1547477124701309","DOIUrl":"https://doi.org/10.1134/s1547477124701309","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper presents experimental studies of parametric X-ray radiation produced by the interaction of relativistic electrons with powder targets and textured polycrystals. The difference in the obtained X-ray spectra is shown. The experimental data obtained are compared with values calculated according to the PXR kinematic theory.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124700687
A. Krivetskaya, D. Kustov, T. Savelieva, V. Levkin, S. Osminin, E. Eventeva, F. Vetshev, S. Kharnas, A. Gorbunov, V. Loshchenov
Abstract
During surgical intervention it is important to know the state of the sutured tissues to prevent postoperative complications. One of the possible ways to determine tissue condition is to measure the level of the oxygen saturation. In this work considered goal was reached by the method of diffuse scattering spectroscopy. The equipment, which was used to perform the measurements, included spectrometer “LESA-01-BIOSPEC”, broadband light source, optical fiber and PC with special software “Uno Momento”. The saturation determining was performed intraoperatively during operations with anastomosis application. When performing esophageal resection saturation was measured not only during open stage of the surgery but also torascopically after the anastomosis formation. Also one of the peculiarity for this organ is the preservation of the saturation level after tissue intersection, while for the stomach and intestine this value decreases significantly after the mobilization of the vessels. Based on the results of this work method of diffuse scattering spectroscopy is suitable for the assessment of tissue state by the measurement of the oxygen saturation level during anastomosis surgeries on the different parts of the gastrointestinal tract.
摘要 在外科手术期间，了解缝合组织的状况对预防术后并发症非常重要。测量氧饱和度是确定组织状况的可行方法之一。在这项工作中，通过漫散射光谱法实现了这一目标。用于测量的设备包括 "LESA-01-BIOSPEC "光谱仪、宽带光源、光纤和装有专用软件 "Uno Momento "的个人电脑。饱和度测定是在应用吻合器的手术中进行的。在进行食管切除术时，不仅要在手术开放阶段测量饱和度，还要在吻合器形成后进行环形测量。该器官的一个特点是在组织交叉后仍能保持饱和度，而胃和肠的饱和度值在血管移动后会明显降低。根据这项研究的结果，弥散散射光谱法适用于通过测量胃肠道不同部位吻合手术期间的氧饱和度来评估组织状态。
{"title":"Spectroscopic Saturation Assessment for Different Organs of the Gastrointestinal Tract","authors":"A. Krivetskaya, D. Kustov, T. Savelieva, V. Levkin, S. Osminin, E. Eventeva, F. Vetshev, S. Kharnas, A. Gorbunov, V. Loshchenov","doi":"10.1134/s1547477124700687","DOIUrl":"https://doi.org/10.1134/s1547477124700687","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>During surgical intervention it is important to know the state of the sutured tissues to prevent postoperative complications. One of the possible ways to determine tissue condition is to measure the level of the oxygen saturation. In this work considered goal was reached by the method of diffuse scattering spectroscopy. The equipment, which was used to perform the measurements, included spectrometer “LESA-01-BIOSPEC”, broadband light source, optical fiber and PC with special software “Uno Momento”. The saturation determining was performed intraoperatively during operations with anastomosis application. When performing esophageal resection saturation was measured not only during open stage of the surgery but also torascopically after the anastomosis formation. Also one of the peculiarity for this organ is the preservation of the saturation level after tissue intersection, while for the stomach and intestine this value decreases significantly after the mobilization of the vessels. Based on the results of this work method of diffuse scattering spectroscopy is suitable for the assessment of tissue state by the measurement of the oxygen saturation level during anastomosis surgeries on the different parts of the gastrointestinal tract.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124701061
L. M. Ledo Pereda, V. N. Semenov, V. S. Rikhvitsky, A. N. Likhachev, R. Sh. Isaev, I. A. Chepurchenko, A. S. Doroshkevich, V. A. Alexandrov
Abstract
A proton beam scanning system for silicon sample irradiation has been developed in the frame of the EG-5 accelerator upgrade project and joint work with Micron JSC and Angstrom JSC located in Zelenograd. Together with employees of SPE ESTO JSC (Zelenograd), an automated system has been developed, produced, and tested on the basis of the EG-5 electrostatic accelerator to carry out the technological operation of ion implantation of silicon wafers for the production of power electronics. The developed system is an experimental platform that allows varying the distribution of the sample surface coating during scanning with accelerated particles.
{"title":"Ion Beam Scanning System for EG-5 Accelerator","authors":"L. M. Ledo Pereda, V. N. Semenov, V. S. Rikhvitsky, A. N. Likhachev, R. Sh. Isaev, I. A. Chepurchenko, A. S. Doroshkevich, V. A. Alexandrov","doi":"10.1134/s1547477124701061","DOIUrl":"https://doi.org/10.1134/s1547477124701061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A proton beam scanning system for silicon sample irradiation has been developed in the frame of the EG-5 accelerator upgrade project and joint work with Micron JSC and Angstrom JSC located in Zelenograd. Together with employees of SPE ESTO JSC (Zelenograd), an automated system has been developed, produced, and tested on the basis of the EG-5 electrostatic accelerator to carry out the technological operation of ion implantation of silicon wafers for the production of power electronics. The developed system is an experimental platform that allows varying the distribution of the sample surface coating during scanning with accelerated particles.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124700973
S. A. Krupko, S. G. Belogurov, A. A. Bezbakh, A. S. Fomichev, L. V. Grigorenko, M. S. Golovkov, A. V. Gorshkov, V. A. Gorshkov, G. Kaminski, A. G. Knyazev, E. Yu. Nikolskii, Yu. L. Parfenova, S. A. Rymzhanova, R. S. Slepnev, S. V. Stepantsov, G. M. Ter-Akopian, V. Chudoba, P. G. Sharov
Abstract
This paper presents a systematic discussion of the design of all key subsystems of the ACCULINNA-2 facility: components of the primary beam line and beam diagnostics equipment, production target, and primary beam absorbers; equipment for the transport, purification, and diagnostics of the secondary beam; a RF-filter for additional beam purification; the cryogenic physical target; the forward spectrometer; and the automated control system. The characteristics of secondary beams are presented, such as angular and spatial distribution in the final focus; the quality of identification of ions by the (Delta )E-ToF method; and the yields of the certain isotopes obtained during experiments in 2018-2020 with primary beams (^{{11}})B (33.5 AMeV), (^{{15}})N (49.3 AMeV), and 32S (52.7 AMeV) while tuning to secondary (^{8})He, (^{9})Li, (^{{11}})Li, (^{{10}})Be, (^{{27}})S, and (^{{26}})P beams with different energies. A comparison of secondary beam transport with the calculated one has been performed. The possibility is substantiated to carry out experiments with light exotic ions at high accuracy of detection and measuring parameters of the incident ion on condensed targets of hydrogen and helium isotopes.
{"title":"Design and Performance of the ACCULINNA-2 Fragment-Separator","authors":"S. A. Krupko, S. G. Belogurov, A. A. Bezbakh, A. S. Fomichev, L. V. Grigorenko, M. S. Golovkov, A. V. Gorshkov, V. A. Gorshkov, G. Kaminski, A. G. Knyazev, E. Yu. Nikolskii, Yu. L. Parfenova, S. A. Rymzhanova, R. S. Slepnev, S. V. Stepantsov, G. M. Ter-Akopian, V. Chudoba, P. G. Sharov","doi":"10.1134/s1547477124700973","DOIUrl":"https://doi.org/10.1134/s1547477124700973","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper presents a systematic discussion of the design of all key subsystems of the ACCULINNA-2 facility: components of the primary beam line and beam diagnostics equipment, production target, and primary beam absorbers; equipment for the transport, purification, and diagnostics of the secondary beam; a RF-filter for additional beam purification; the cryogenic physical target; the forward spectrometer; and the automated control system. The characteristics of secondary beams are presented, such as angular and spatial distribution in the final focus; the quality of identification of ions by the <span>(Delta )</span>E-ToF method; and the yields of the certain isotopes obtained during experiments in 2018-2020 with primary beams <span>(^{{11}})</span>B (33.5 AMeV), <span>(^{{15}})</span>N (49.3 AMeV), and <sup>32</sup>S (52.7 AMeV) while tuning to secondary <span>(^{8})</span>He, <span>(^{9})</span>Li, <span>(^{{11}})</span>Li, <span>(^{{10}})</span>Be, <span>(^{{27}})</span>S, and <span>(^{{26}})</span>P beams with different energies. A comparison of secondary beam transport with the calculated one has been performed. The possibility is substantiated to carry out experiments with light exotic ions at high accuracy of detection and measuring parameters of the incident ion on condensed targets of hydrogen and helium isotopes.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124701267
E. A. Butenko, D. E. Donets, M. G. Dzugaev, N. A. Malyshev, E. S. Matyuhkanov, D. O. Ponkin, D. N. Rassadov
Abstract
Electron String Ion Source (ESIS) is a type of ion source, which is under development since 1994 [1], when the electron string phenomenon was first observed at VBLHEP JINR. ESIS is a sophisticated modification of Electron Beam Ion Source (EBIS) working in a reflex mode of operation under specific conditions, when emitted electrons are multiply used for electron impact ionization, being transformed to a new steady state of a hot magnetically compressed plasma, called an “electron string”. ESIS is a complex facility consisting of several systems: the superconducting solenoid, the cryogenic and vacuum systems, the electron gun, the electron reflector, the beam drift structure, the locking system, etc. To ensure the operation of these systems a special electronics and control systems developed by the engineers of the ESIS group are used. The article describes electron string ion sources measurement and control electronics and basic principles of their work.
摘要电子串离子源（ESIS）是一种离子源，自 1994 年[1]在日本核研院 VBLHEP 首次观测到电子串现象以来一直在开发之中。ESIS 是电子束离子源（EBIS）的一种复杂改型，在特定条件下以反射模式工作，发射的电子被多重用于电子撞击电离，转变为一种新的热磁压缩等离子体稳定状态，称为 "电子串"。ESIS 是一个复杂的设施，由多个系统组成：超导螺线管、低温和真空系统、电子枪、电子反射器、光束漂移结构、锁定系统等。为了确保这些系统的运行，使用了由 ESIS 小组工程师开发的特殊电子和控制系统。文章介绍了电子串离子源的测量和控制电子装置及其基本工作原理。
{"title":"Electron String Ion Sources (ESIS) Electronics Development","authors":"E. A. Butenko, D. E. Donets, M. G. Dzugaev, N. A. Malyshev, E. S. Matyuhkanov, D. O. Ponkin, D. N. Rassadov","doi":"10.1134/s1547477124701267","DOIUrl":"https://doi.org/10.1134/s1547477124701267","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Electron String Ion Source (ESIS) is a type of ion source, which is under development since 1994 [1], when the electron string phenomenon was first observed at VBLHEP JINR. ESIS is a sophisticated modification of Electron Beam Ion Source (EBIS) working in a reflex mode of operation under specific conditions, when emitted electrons are multiply used for electron impact ionization, being transformed to a new steady state of a hot magnetically compressed plasma, called an “electron string”. ESIS is a complex facility consisting of several systems: the superconducting solenoid, the cryogenic and vacuum systems, the electron gun, the electron reflector, the beam drift structure, the locking system, etc. To ensure the operation of these systems a special electronics and control systems developed by the engineers of the ESIS group are used. The article describes electron string ion sources measurement and control electronics and basic principles of their work.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124701310
V. I. Vivchar, K. V. Erin
Abstract—
Spectra of optical effects of dichroism and birefringence are investigated in magnetic fluids like magnetite in kerosene with the average particle sizes of 6.7 and 13.7 nm. Substantial differences in the magnitude of the effects and in their spectral behavior are found that stem from the formation of aggregates in a sample with larger particles. The presence of particle aggregates appreciably changes the optical properties of the system. The effects are interpreted on the basis of the single-particle orientation model with allowance for the superparamagnetism of magnetite nanoparticles.
{"title":"Effects of Birefringence and Dichroism in Magnetic Fluids with Different Degrees of Aggregative Stability","authors":"V. I. Vivchar, K. V. Erin","doi":"10.1134/s1547477124701310","DOIUrl":"https://doi.org/10.1134/s1547477124701310","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>Spectra of optical effects of dichroism and birefringence are investigated in magnetic fluids like magnetite in kerosene with the average particle sizes of 6.7 and 13.7 nm. Substantial differences in the magnitude of the effects and in their spectral behavior are found that stem from the formation of aggregates in a sample with larger particles. The presence of particle aggregates appreciably changes the optical properties of the system. The effects are interpreted on the basis of the single-particle orientation model with allowance for the superparamagnetism of magnetite nanoparticles.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-14DOI: 10.1134/s1547477124701164
F. Dubinin, N. Boyko, A. Konotop, G. Dolganov, A. Zhurkina
Abstract
We present an early-stage prototype of a positron emission tomograph (PET) based on 3 × 3 × 20 mm GAGG(Ce) scintillators optically coupled to 3 × 3 mm silicon photomultipliers (SiPMs) (Onsemi fc30035-smt). The detectors are read out by a Weeroc 32-channel Petiroc2A chip, allowing for precise charge and time measurements and designed specifically for SiPMs readout. In the report, the energy and time resolutions of the system measured with Ti-44 source are presented, the imaging capabilities of the system are discussed.
{"title":"PET Prototype Based on Scintillation Detectors GAGG-SiPM Coupled to 32-Channel Petiroc2A Chip","authors":"F. Dubinin, N. Boyko, A. Konotop, G. Dolganov, A. Zhurkina","doi":"10.1134/s1547477124701164","DOIUrl":"https://doi.org/10.1134/s1547477124701164","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>We present an early-stage prototype of a positron emission tomograph (PET) based on 3 × 3 × 20 mm GAGG(Ce) scintillators optically coupled to 3 × 3 mm silicon photomultipliers (SiPMs) (Onsemi fc30035-smt). The detectors are read out by a Weeroc 32-channel Petiroc2A chip, allowing for precise charge and time measurements and designed specifically for SiPMs readout. In the report, the energy and time resolutions of the system measured with Ti-44 source are presented, the imaging capabilities of the system are discussed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-07DOI: 10.1134/s1547477124700407
A. R. Popov, A. I. Studenikin
Abstract
Leptonic CP violation is one of the most important topics in neutrino physics. CP violation in the neutrino sector is strongly related to the nature of neutrinos: whether they are Dirac or Majorana particles. In [1] we have shown that for Majorana neutrinos appearance of nonzero Majorana CP-violating phases combined with strong magnetic field during supernova core-collapse can induce new resonances in neutrino oscillations, for example in ({{nu }_{{text{e}}}} to {{bar {nu }}_{tau }}) channel. In this paper we further study new resonances in Majorana neutrino oscillations, in particular energy dependence of amplitudes of resonant oscillations. Our findings suggest a potential astrophysical setup for studying the nature of neutrino masses and leptonic CP violation and may be important for future neutrino experiments, such as JUNO, Hyper-Kamiokande and DUNE.
摘要质子CP违反是中微子物理学中最重要的课题之一。中微子领域的CP违反与中微子的性质密切相关：它们是狄拉克粒子还是马约拉纳粒子。在[1]中，我们已经证明，对于马约拉纳中微子来说，在超新星核心坍缩过程中，非零的马约拉纳CP违反相与强磁场的结合会诱发中微子振荡中的新共振，例如在({{nu }_{{text{e}}}} to {{bar {nu }}_{tau }})通道中。在本文中，我们进一步研究了马约拉纳中微子振荡中的新共振，特别是共振振荡振幅的能量依赖性。我们的发现为研究中微子质量和轻子CP违反的性质提供了一个潜在的天体物理装置，并可能对未来的中微子实验，如JUNO、Hyper-Kamiokande和DUNE具有重要意义。
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