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Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)最新文献

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Production of a polarizable target using mechanical doping method and trial of dynamic nuclear polarization 机械掺杂法制备极化靶及动态核极化试验
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-06-11 DOI: 10.22323/1.324.0005
D. Miura, T. Iwata, Y. Miyachi, G. Nukazuka, D. Kaneko
{"title":"Production of a polarizable target using mechanical doping method and trial of dynamic nuclear polarization","authors":"D. Miura, T. Iwata, Y. Miyachi, G. Nukazuka, D. Kaneko","doi":"10.22323/1.324.0005","DOIUrl":"https://doi.org/10.22323/1.324.0005","url":null,"abstract":"Dynamic Nuclear Polarization (DNP) which is often employed for polarized solid targets, needs free electron doping to transfer high electron polarization to target nuclei. A newly proposed “mechanical-doping” method was applied in preparation of a polarized target material. A solid material having been crushed into small particles with a diameter of about 20 nm, is mixed with a free radical. This allows target nuclei to have more chance to interact with the free electrons or polarized nuclei surrounding the small particles. A first DNP test at a magnetic field of 2.5 T and a temperature of 0.9 K was performed with a sample of LaF_{3} processed in the mechanical-doping method to introduce a free radical TEMPO dispersed in ethanol. ^{19}F polarizations of 3.3 % and -2.7 % were achieved. The obtained polarization enhancement for ^{19}F demonstrated effectiveness of the new method.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115893495","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}
引用次数: 0
Development of closed -cycle dynamic nuclear polarization system for small -angle neutron scattering and neutron reflectometry 用于小角中子散射和中子反射测量的闭周期动态核极化系统的研制
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-06-06 DOI: 10.22323/1.324.0009
T. Kumada, K. Akutsu, K. Ohishi, Y. Kawamura, T. Morikawa, M. Sahara, J. Suzuki, N. Torikai
{"title":"Development of closed -cycle dynamic nuclear polarization system for small -angle neutron scattering and neutron reflectometry","authors":"T. Kumada, K. Akutsu, K. Ohishi, Y. Kawamura, T. Morikawa, M. Sahara, J. Suzuki, N. Torikai","doi":"10.22323/1.324.0009","DOIUrl":"https://doi.org/10.22323/1.324.0009","url":null,"abstract":"We develop a closed-cycle dynamic nuclear polarization (DNP) system for spin-contrast-variation (SCV) small-angle neutron scattering (SANS) and neutron reflectometry (NR) to increase the use of these techniques. Compared with our cryogen-filled DNP system, the closed-cycle system is made compact and can change the sample in a comparable time-scale, but achieved proton-polarization is only 11.2 and 20$pm$3% for bulk and thin-film samples, respectively, whereas 32-37% is achieved with the cryogen-filled system. This is because cooling power of the recycling cold helium gas in the closed-cycle system is lower than that of superfluid helium in the cryogen-filled one. In order to improve the polarization with the closed-cycle system, we have to improve thermal contact between the sample and cold helium gas to minimize microwave heating of the sample.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123971959","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}
引用次数: 0
Axion dark matter search with the storage ring EDM method 用存储环EDM方法搜索轴子暗物质
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-06-01 DOI: 10.22323/1.324.0036
Seungpyo Chang, S. Haciomeroglu, O. Kim, Soohyung Lee, Seongtae Park, Y. Semertzidis
{"title":"Axion dark matter search with the storage ring EDM method","authors":"Seungpyo Chang, S. Haciomeroglu, O. Kim, Soohyung Lee, Seongtae Park, Y. Semertzidis","doi":"10.22323/1.324.0036","DOIUrl":"https://doi.org/10.22323/1.324.0036","url":null,"abstract":"We propose using a modified storage ring EDM method to search for the axion dark matter induced EDM oscillation in nucleons. The method uses a combination of B and E-fields to produce a resonance between the $g-2$ precession frequency and the background axion field oscillation to greatly enhance the sensitivity to it. An axion frequency range of 100Hz to 100MHz can be scanned with large sensitivity, corresponding to $f_a$ range of $10^{13} $ GeV $leq f_a leq 10^{19}$ GeV the breakdown scale of the global symmetry generating the axion or axion like particles (ALPs).","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130829187","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}
引用次数: 6
LYSO modules for the JEDI polarimeter: production, laboratory tests and results of first measurements 用于JEDI偏振计的LYSO模块:生产、实验室测试和首次测量的结果
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0026
D. Shergelashvili
{"title":"LYSO modules for the JEDI polarimeter: production, laboratory tests and results of first measurements","authors":"D. Shergelashvili","doi":"10.22323/1.324.0026","DOIUrl":"https://doi.org/10.22323/1.324.0026","url":null,"abstract":"The JEDI collaboration aims to search for the electric dipole moment (EDM) for the protons and deuterons in the storage ring (srEDM). One of the main components of the srEDM experimental set-up is the polarimeter to observe the slow buildup of vertical polarization. In our concept, the polarimeter is based on inorganic novel LYSO crystals and low voltage silicon photomultipliers (SiPM). Up to now, more than 30 modules have been assembled in different configurations. They have first been tested in the laboratory with internal and external radiation sources and subsequently, they have been exposed to the experimental environment with accelerator beams. We have performed three test beam times at several different beam energies. The results of the measurements and accumulated experience of the module production will be presented.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130408656","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}
引用次数: 2
Preface to PSTP 2017 Proceedings PSTP 2017论文集前言
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0001
Seo-Jung Park
{"title":"Preface to PSTP 2017 Proceedings","authors":"Seo-Jung Park","doi":"10.22323/1.324.0001","DOIUrl":"https://doi.org/10.22323/1.324.0001","url":null,"abstract":"","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"351 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134330697","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}
引用次数: 0
Resonant (Longitudinal and Transverse) Electron Polarimetry 共振(纵向和横向)电子偏振法
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0028
R. Talman, B. Roberts, J. Grames, A. Hofler, R. Kazimi, M. Poelker, R. Suleiman
{"title":"Resonant (Longitudinal and Transverse) Electron Polarimetry","authors":"R. Talman, B. Roberts, J. Grames, A. Hofler, R. Kazimi, M. Poelker, R. Suleiman","doi":"10.22323/1.324.0028","DOIUrl":"https://doi.org/10.22323/1.324.0028","url":null,"abstract":"Experiments are proposed to measure (first longitudinal, then, later, using Stern-Gerlach (SG) deflection, transverse) polarization of an electron beam by measuring the excitation induced in a resonant cavity. With ideal resonator construction and positioning there would be no resonator excitation caused directly by the beam charge. But, because the electron charge is so large relative to its magnetic moment, special beam preparation and polarization modulation are required to suppress this background. Signal levels and foreground to background ratios are calculated.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124967268","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}
引用次数: 1
The HJET polarimeter in RHIC Run 2017 2017年RHIC Run中的HJET偏振计
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0022
A. Poblaguev, E. Aschenauer, G. Atoian, K. O. Eyser, H. Huang, Y. Makdisi, W. Schmidke, A. Zelenski, I. Alekseev, D. Svirida
{"title":"The HJET polarimeter in RHIC Run 2017","authors":"A. Poblaguev, E. Aschenauer, G. Atoian, K. O. Eyser, H. Huang, Y. Makdisi, W. Schmidke, A. Zelenski, I. Alekseev, D. Svirida","doi":"10.22323/1.324.0022","DOIUrl":"https://doi.org/10.22323/1.324.0022","url":null,"abstract":"The Polarized Atomic Hydrogen Jet Target (HJET) Polarimeter commissioned in 2004 was designed to measure absolute polarization of proton beams in Relativistic Heavy Ion Collider (RHIC). HJET performance in RHIC Run 2017 (255 GeV proton beams) will be discussed. The long term (1-100 days) stability of the measured effective analyzing power $langle A_Nrangle$ was found to be $sqrt{langle(deltasigma^mathrm{syst}_{A_N})^2rangle}/A_Nle0.1%$. The systematic error in measurement of the RHIC beam average polarization of $Psim56%$ was evaluated to be $sigma_P^mathrm{syst}/Plesssim0.5%$. The statistical error in such a measurement is defined by the number of detected $p^uparrow p^uparrow$ elastic events and for an 8 hours RHIC store it was typically at $sigma_P^mathrm{stat}approx2%$. The elastic events statistics of about $10^9$ per RHIC beam accumulated during Run 2017 allowed us to make a detailed study of the proton-proton single-spin $A_N (t)$ and double-spin $A_{NN}(t)$ analyzing powers in the momentum transfer range $0.001<-t<0.020~(mathrm{GeV}⁄c)^2$. Contributions of the hadronic single $r_5$ and double $r_2$ spin-flip amplitudes were isolated. Analysis of the inelastic background $p_mathrm{beam}^uparrow+p_mathrm{target}^uparrowrightarrow X+p_mathrm{target}$ allowed us to experimentally evaluate the beam and target spin correlated asymmetries in these processes for $M_X-m_plesssim400 mathrm{MeV}$ and $tsim-0.005 (mathrm{GeV}⁄c)^2$. The data acquired during 3 weeks of Gold-Gold beams in RHIC allowed us to make a high statistics measurement of the $p^uparrowmathrm{Au}$ analyzing power at $E_text{Lab}=27.2$unit{}{GeV}.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128398395","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}
引用次数: 5
Status and Perspectives of the S-DALINAC Polarized-Electron Injector* S-DALINAC极化电子注入器的现状与展望*
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0016
M. Herbert, J. Enders, M. Espig, Y. Fritzsche, N. Kurichiyanil, M. Wagner
{"title":"Status and Perspectives of the S-DALINAC Polarized-Electron Injector*","authors":"M. Herbert, J. Enders, M. Espig, Y. Fritzsche, N. Kurichiyanil, M. Wagner","doi":"10.22323/1.324.0016","DOIUrl":"https://doi.org/10.22323/1.324.0016","url":null,"abstract":"The S-DALINAC Polarized Injector (SPIN) uses GaAs photocathodes to provide pulsed and/or polarized electron beams for nuclear-structure investigations. Recently, a test facility for Photo-Cathode Activation, Test, and Cleaning using atomic-Hydrogen (Photo-CATCH) has been developed. This setup uses an inverted insulator geometry. Tests and optimizations are conducted at Photo-CATCH in order to implement the inverted design at SPIN. We will present the current status of Photo-CATCH, the planned upgrade of SPIn (aimed at an operational voltage of 200 kV) and future measurements. \u0000 \u0000*Work supported by DFG (GRK 2128 “AccelencE”), BMBF (05H15RDRB1), and in part by the state of Hesse through the LOEWE center HIC for FAIR.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130530773","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}
引用次数: 1
NMR Polarization Measurements for Jefferson Lab's Solid Polarized Targets 杰弗逊实验室固体极化靶的核磁共振极化测量
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0011
J. Maxwell
{"title":"NMR Polarization Measurements for Jefferson Lab's Solid Polarized Targets","authors":"J. Maxwell","doi":"10.22323/1.324.0011","DOIUrl":"https://doi.org/10.22323/1.324.0011","url":null,"abstract":"Solid polarized targets rely on Nuclear Magnetic Resonance techniques to provide accurate measurements of the enhanced polarization provided by Dynamic Nuclear Polarization. Upcoming polarized target experiments in Jefferson Lab's Hall B present challenging conditions which demand improvements to traditional NMR methods. We will discuss the changes prompted by the new Hall B target, lay out plans for improvements to our NMR system, and show results of initial tests of our designs.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131940795","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}
引用次数: 0
AGS P-carbon CNI polarimeter Operation Experience 具有AGS P-carbon CNI偏振计操作经验
Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017) Pub Date : 2018-05-31 DOI: 10.22323/1.324.0023
Haixin Huang, A. Poblaguev, D. Steski, K. Yip, A. Zelenski
{"title":"AGS P-carbon CNI polarimeter Operation Experience","authors":"Haixin Huang, A. Poblaguev, D. Steski, K. Yip, A. Zelenski","doi":"10.22323/1.324.0023","DOIUrl":"https://doi.org/10.22323/1.324.0023","url":null,"abstract":"The p-carbon polarimeter working in the dp/p Coulomb Nuclear Interference (CNI) region has \u0000been used in the Brookhaven Alternating Gradient Synchrotron (AGS ) for many years. It has \u0000gone though several upgrades to improve its performance. With targets sweeping through beam \u0000vertically and horizontally, the polarimeter can provide polarization profile information. To preserve \u0000polarization, a pair of horizontal tune jump quads have been used to overcome horizontal \u0000intrinsic resonances. Recently, the polarization measurement on the energy ramp has been used \u0000to decide the beam energy as function of time on the ramp. This paper summarize the recent \u0000operation experience of AGS p-carbon CNI polarimeter.","PeriodicalId":166894,"journal":{"name":"Proceedings of XVII International Workshop on Polarized Sources, Targets & Polarimetry — PoS(PSTP2017)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115501407","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}
引用次数: 0
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