多种减方差技术在电子辐照加速器屏蔽计算中的组合应用效果评估
减方差技术是辐射防护、核医学、核探井等应用领域中解决深穿透问题的常用方法。当前减方差技术的研究基本基于简单理论几何模型，缺少在实际复杂模型上的讨论，本文以实际应用的电子辐照加速器整体系统为研究的几何模型，以屏蔽后的剂量为计算目标。比较了电子和不同辐照物质相互作用时产生次级光子能量谱和方向谱的差异，并以蒙特卡罗程序MCNP5（Monte Carlo N Particle TransportCode）为平台详细研究对比了几何分裂、源偏倚、指数衰减、分步输运、DXTRAN球和权窗等常见减方差技术在单独使用和不同组合使用下的实际效果，评估了具有实用性减方差技术的选择和组合。结果表明：辐照物质对次级光子...
Saved in:
| Published in | 核技术 Vol. 41; no. 3; pp. 25 - 31 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中广核达胜加速器技术有限公司 苏州 215214%苏州大学 医学部放射卫生与防护学院 苏州 215123
10.03.2018
苏州大学 医学部放射卫生与防护学院 苏州 215123 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-3219 |
| DOI | 10.11889/j.0253-3219.2018.hjs.41.030201 |
Cover
| Abstract | 减方差技术是辐射防护、核医学、核探井等应用领域中解决深穿透问题的常用方法。当前减方差技术的研究基本基于简单理论几何模型，缺少在实际复杂模型上的讨论，本文以实际应用的电子辐照加速器整体系统为研究的几何模型，以屏蔽后的剂量为计算目标。比较了电子和不同辐照物质相互作用时产生次级光子能量谱和方向谱的差异，并以蒙特卡罗程序MCNP5（Monte Carlo N Particle TransportCode）为平台详细研究对比了几何分裂、源偏倚、指数衰减、分步输运、DXTRAN球和权窗等常见减方差技术在单独使用和不同组合使用下的实际效果，评估了具有实用性减方差技术的选择和组合。结果表明：辐照物质对次级光子的方向谱影响很大，出于建模有效性考虑，几何模型应尽量贴合实际，不能过分简化；分步输运和源偏倚相比于其它常规减方差技术可以更好地降低计算误差，它们和几何分裂、DXTRAN球和指数衰减组合使用时，可以进一步降低计算误差，有效提高结果的可信度；权窗相对于常规减方差技术具有更好的计算效率和客观性，以权窗、分步输运和源偏倚为基础，再组合其他减方差技术，可以很好地解决实际应用中复杂模型的深穿透问题。 |
|---|---|
| AbstractList | 减方差技术是辐射防护、核医学、核探井等应用领域中解决深穿透问题的常用方法。当前减方差技术的研究基本基于简单理论几何模型，缺少在实际复杂模型上的讨论，本文以实际应用的电子辐照加速器整体系统为研究的几何模型，以屏蔽后的剂量为计算目标。比较了电子和不同辐照物质相互作用时产生次级光子能量谱和方向谱的差异，并以蒙特卡罗程序MCNP5（Monte Carlo N Particle TransportCode）为平台详细研究对比了几何分裂、源偏倚、指数衰减、分步输运、DXTRAN球和权窗等常见减方差技术在单独使用和不同组合使用下的实际效果，评估了具有实用性减方差技术的选择和组合。结果表明：辐照物质对次级光子的方向谱影响很大，出于建模有效性考虑，几何模型应尽量贴合实际，不能过分简化；分步输运和源偏倚相比于其它常规减方差技术可以更好地降低计算误差，它们和几何分裂、DXTRAN球和指数衰减组合使用时，可以进一步降低计算误差，有效提高结果的可信度；权窗相对于常规减方差技术具有更好的计算效率和客观性，以权窗、分步输运和源偏倚为基础，再组合其他减方差技术，可以很好地解决实际应用中复杂模型的深穿透问题。 TL99; 减方差技术是辐射防护、核医学、核探井等应用领域中解决深穿透问题的常用方法.当前减方差技术的研究基本基于简单理论几何模型,缺少在实际复杂模型上的讨论,本文以实际应用的电子辐照加速器整体系统为研究的几何模型,以屏蔽后的剂量为计算目标.比较了电子和不同辐照物质相互作用时产生次级光子能量谱和方向谱的差异,并以蒙特卡罗程序MCNP5 (Monte Carlo N Particle Transport Code)为平台详细研究对比了几何分裂、源偏倚、指数衰减、分步输运、DXTRAN球和权窗等常见减方差技术在单独使用和不同组合使用下的实际效果,评估了具有实用性减方差技术的选择和组合.结果表明:辐照物质对次级光子的方向谱影响很大,出于建模有效性考虑,几何模型应尽量贴合实际,不能过分简化;分步输运和源偏倚相比于其它常规减方差技术可以更好地降低计算误差,它们和几何分裂、DXTRAN球和指数衰减组合使用时,可以进一步降低计算误差,有效提高结果的可信度;权窗相对于常规减方差技术具有更好的计算效率和客观性,以权窗、分步输运和源偏倚为基础,再组合其他减方差技术,可以很好地解决实际应用中复杂模型的深穿透问题. |
| Abstract_FL | [Background] Variance reduction is a common method to resolve the problems in deep penetration application such as radiation shielding, medical physics and well-logging. Currently, the study of the variance reduction techniques is based on simple theoretical geometric model, lacking the discussion on complex practical applications. [Purpose] This paper aims to find an optimized combined variance reduction technique in deep penetration application on the practical complex model. [Methods] With an electron irradiation accelerator as the model, this paper studied the effects of combined variance reduction techniques on MCNP5 (Monte Carlo N Particle Transport Code) platform, including geometry splitting, biasing the source, exponential transform, step-step transform, DXTRAN and weight window. [Result] The results showed that the irradiation products had a great influence on the angular distribution of spectrum of the new source, and the geometric model should not be overly simplified. Compared with other variance-reducing techniques, the step-step transform and biasing the source efficiency reduced the relative error and could get a better calculation efficiency combined with geometric splitting, exponential transform and DXTRAN. Weight window had better computation efficiency and more objectivity. [Conclusion] The step-step transform and biasing the source, combined with other variance reduction techniques can resolve deep penetration problem in complex practical application based on weight window. |
| Author | 崔甜甜;张书源;孙亮;陆洁平 |
| AuthorAffiliation | 苏州大学医学部放射卫生与防护学院,苏州215123;中广核达胜加速器技术有限公司,苏州215214 |
| AuthorAffiliation_xml | – name: 苏州大学 医学部放射卫生与防护学院 苏州 215123;中广核达胜加速器技术有限公司 苏州 215214%苏州大学 医学部放射卫生与防护学院 苏州 215123 |
| Author_FL | LU Jieping ZHANG Shuyuan SUN Liang CUI Tiantian |
| Author_FL_xml | – sequence: 1 fullname: CUI Tiantian – sequence: 2 fullname: ZHANG Shuyuan – sequence: 3 fullname: SUN Liang – sequence: 4 fullname: LU Jieping |
| Author_xml | – sequence: 1 fullname: 崔甜甜;张书源;孙亮;陆洁平 |
| BookMark | eNo9kMtKw0AYhWdRwVZ9CRFcJc5MMs1kKcUbFNwoLstkkrQNmmqDiLsuKpaCtIuoWIoXENpNW12Id5-mk8S3cKTi6vBzPs4PXwak_IrvALCIoIoQpeaSp0JMNEXDyFQxRFQteYGqIxVqUJ4pkP6vp0EmCDwIdRPqJA12xH0n7p2J01Z08Sqeh1GzFnVHotuPwycxaCdf7fikJ5q337UbcdUXj60k_EyGd_HwcvwyiDv1-L0u2g3xFsZhPzpvRNfdZFQffzzMgimX7QbO3F_OgO3Vla3cupLfXNvILecVjnCWKLYFmcV019YoZTrCECLCMaEWdrMYORA73LUsjHXOoS1TNhTbLjKIwaltMW0GLEx2j5jvMr9Y8CqHVV9-LEgDvyakAUgkNj_BeKniFw_KEtyvlvdY9biQNXQDUmJS7QcFzYC4 |
| ClassificationCodes | TL99 |
| ContentType | Journal Article |
| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
| Copyright_xml | – notice: Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
| DBID | 2RA 92L CQIGP W92 ~WA 2B. 4A8 92I 93N PSX TCJ |
| DOI | 10.11889/j.0253-3219.2018.hjs.41.030201 |
| DatabaseName | 维普期刊资源整合服务平台 中文科技期刊数据库-CALIS站点 维普中文期刊数据库 中文科技期刊数据库-工程技术 中文科技期刊数据库- 镜像站点 Wanfang Data Journals - Hong Kong WANFANG Data Centre Wanfang Data Journals 万方数据期刊 - 香港版 China Online Journals (COJ) China Online Journals (COJ) |
| DatabaseTitleList | |
| DeliveryMethod | fulltext_linktorsrc |
| Discipline | Engineering |
| DocumentTitleAlternate | The assessment for the effects of multiple combined variance reduction techniques in shielding computation on an electron irradiation accelerator |
| DocumentTitle_FL | The assessment for the effects of multiple combined variance reduction techniques in shielding computation on an electron irradiation accelerator |
| EndPage | 31 |
| ExternalDocumentID | hjs201803005 674708598 |
| GrantInformation_xml | – fundername: 国际热核聚变实验堆(ITER)计划专项; 国家自然科学基金(No.11575124)资助Supported by Project of International Thermonuclear Experimental Reactor; National Natural Science Foundation of China funderid: (2014GB112006); (2014GB112006); (11575124) |
| GroupedDBID | -03 2B. 2C0 2RA 5XA 5XD 92H 92I 92L ACGFS ALMA_UNASSIGNED_HOLDINGS CCEZO CEKLB CQIGP CW9 GROUPED_DOAJ TCJ TGT U1G U5M W92 ~WA 4A8 93N ABJNI PSX |
| ID | FETCH-LOGICAL-c1265-db0aba4fd388a4120015c258b2f621e02ecfbb224cc0db2258b82df1757c8dba3 |
| ISSN | 0253-3219 |
| IngestDate | Thu May 29 03:54:28 EDT 2025 Wed Feb 14 09:55:48 EST 2024 |
| IsPeerReviewed | true |
| IsScholarly | true |
| Issue | 3 |
| Keywords | 电子辐照加速器 Deep penetration Monte Carlo Variance reduction 蒙特卡罗 Electron irradiation accelerator 减方差 深穿透 |
| Language | Chinese |
| LinkModel | OpenURL |
| MergedId | FETCHMERGED-LOGICAL-c1265-db0aba4fd388a4120015c258b2f621e02ecfbb224cc0db2258b82df1757c8dba3 |
| Notes | CUI Tiantian1,2, ZHANG Shuyuan1,SUN Liang1, LU Jieping1 （1.School of Radiological Medicine and Protection, Medical College of Soochow University, Suzhou 215123, China; 2. CGN Dasheng Electron Accelerator Technology Company, Suzhou 215214, China） 31-1342/TL Normalized phase space;Phase space reconstruction;MENT algorithm;SXFEL [Background] Phase space is an important parameter to describe the beam transmission, and it is of great importance to measure the phase space distribution experimentally in linear accelerator（LINAC） commissioning. Computer tomography technology has been used in many accelerators to characterize the phase space of an electron beam in recent years. [Purpose] This study aims to measure two-dimensional distribution of phase space by reconstruction technology for high-brightness electron beam. [Methods] Maximum entropy（MENT） algorithm and filtered back projection（FBP） algorithm were combined with computer tomography technology and normalized phase space theory to reconstruct the normalized phas |
| PageCount | 7 |
| ParticipantIDs | wanfang_journals_hjs201803005 chongqing_primary_674708598 |
| PublicationCentury | 2000 |
| PublicationDate | 2018-03-10 |
| PublicationDateYYYYMMDD | 2018-03-10 |
| PublicationDate_xml | – month: 03 year: 2018 text: 2018-03-10 day: 10 |
| PublicationDecade | 2010 |
| PublicationTitle | 核技术 |
| PublicationTitleAlternate | Nuclear Techniques |
| PublicationTitle_FL | Nuclear Techniques |
| PublicationYear | 2018 |
| Publisher | 中广核达胜加速器技术有限公司 苏州 215214%苏州大学 医学部放射卫生与防护学院 苏州 215123 苏州大学 医学部放射卫生与防护学院 苏州 215123 |
| Publisher_xml | – name: 中广核达胜加速器技术有限公司 苏州 215214%苏州大学 医学部放射卫生与防护学院 苏州 215123 – name: 苏州大学 医学部放射卫生与防护学院 苏州 215123 |
| SSID | ssj0049045 ssib001129530 ssib051373102 ssib023167186 ssib001526398 |
| Score | 2.170377 |
| Snippet | 减方差技术是辐射防护、核医学、核探井等应用领域中解决深穿透问题的常用方法。当前减方差技术的研究基本基于简单理论几何模型，缺少在实际复杂模型上的讨论，本文以实际应用... TL99; 减方差技术是辐射防护、核医学、核探井等应用领域中解决深穿透问题的常用方法.当前减方差技术的研究基本基于简单理论几何模型,缺少在实际复杂模型上的讨论,本文以实际... |
| SourceID | wanfang chongqing |
| SourceType | Aggregation Database Publisher |
| StartPage | 25 |
| SubjectTerms | 深穿透;减方差;蒙特卡罗;电子辐照加速器 |
| Title | 多种减方差技术在电子辐照加速器屏蔽计算中的组合应用效果评估 |
| URI | http://lib.cqvip.com/qk/92722X/201803/674708598.html https://d.wanfangdata.com.cn/periodical/hjs201803005 |
| Volume | 41 |
| hasFullText | 1 |
| inHoldings | 1 |
| isFullTextHit | |
| isPrint | |
| journalDatabaseRights | – providerCode: PRVAON databaseName: DOAJ Directory of Open Access Journals issn: 0253-3219 databaseCode: DOA dateStart: 20130101 customDbUrl: isFulltext: true dateEnd: 99991231 titleUrlDefault: https://www.doaj.org/ omitProxy: true ssIdentifier: ssj0049045 providerName: Directory of Open Access Journals |
| link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwnV3NT9RAFJ8AJkYPxs-IiOHgxFPXtjPTnR7b3W6IiZ4gctv0E-JhUYELJw4YCYmBw6qRED8SE_YC6MH47V9Dt-t_4XvT7lKDIeql-_Je5_de32tn3nRnXgm5Xg2MCEbJRIOHiWkcq7f6lvS12Iqgn9QlZxFuFL59x5qc5rdmxMzQ8ERp1dLSYlAJl_-4r-R_ogo8iCvukv2HyA5AgQE0xBeOEGE4_lWMqSeow6ntUK9KnSqVdeTA9F42qGdR26KujRwXpB5ypIMrG1BUo04DRUhIbG5z6goFWKc2nCOp6ykC0ASCI7JDHeDYanlE3txWzUGFoZRKhVNHAjQ6hjIMcKA58CWCoy4wgyPhuooQqEjmOA4i5PYgMpgqlAgID61F5IZqBYA16url9BpPAwtdefRi-3eWUsIPlSBkn2CuktbUVXJ0nmMhABqlF1J0j62kDl4ZMm3kyPxMTM0ViE1dVn6lYqg9hsXi2rznNQXTWL8vL4aJvD5X8Tiwcp8vStlDPqQdHZektNXANIDGVYWyMndvocKNCvS0ZvFO5_fi3xbM9rAEnRwmJ0wYt_TSSwOV8EK6Jsr_iwrTKhV0NLHOgXFYIFAYrMpUwbg8V-G2rj7jPbDqJLnRN_fm8cZiLZK5-dbsA8iw1Ia3VuK3Zku52dRZcqaYVE04-RNyjgwtz50np0ulNi-Qu-nbrWznSfp4o_vsc_pxr7u-0t3eT7c7WftDurvZ-7GZPdpJ11__XHmVvuik7zd67e-9vTfZ3vODT7vZ1mr2dTXdXEu_tLN2p_t0rftyu7e_evDt3UUy3fCmapNa8VERLTRMS2hRoPuBz5OISelzA5cUitAUMjATyzRi3YzDJAggsQ1DPYJfkEgzSiDLroYyCnx2iYy05lvxZTIBIDIJEjOMIYvngvkRs8BPgSlD20-MeJSMDVzUvJ8Xj2kOIjpKxgunNYsuZaEJHkZP6_gNiSvHth4jpw7v3KtkZPHhUjwO6fFicE3dIb8ASDuWxg |
| linkProvider | Directory of Open Access Journals |
| openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=%E5%A4%9A%E7%A7%8D%E5%87%8F%E6%96%B9%E5%B7%AE%E6%8A%80%E6%9C%AF%E5%9C%A8%E7%94%B5%E5%AD%90%E8%BE%90%E7%85%A7%E5%8A%A0%E9%80%9F%E5%99%A8%E5%B1%8F%E8%94%BD%E8%AE%A1%E7%AE%97%E4%B8%AD%E7%9A%84%E7%BB%84%E5%90%88%E5%BA%94%E7%94%A8%E6%95%88%E6%9E%9C%E8%AF%84%E4%BC%B0&rft.jtitle=%E6%A0%B8%E6%8A%80%E6%9C%AF&rft.au=%E5%B4%94%E7%94%9C%E7%94%9C%3B%E5%BC%A0%E4%B9%A6%E6%BA%90%3B%E5%AD%99%E4%BA%AE%3B%E9%99%86%E6%B4%81%E5%B9%B3&rft.date=2018-03-10&rft.issn=0253-3219&rft.volume=41&rft.issue=3&rft.spage=25&rft.epage=31&rft_id=info:doi/10.11889%2Fj.0253-3219.2018.hjs.41.030201&rft.externalDocID=674708598 |
| thumbnail_s | http://utb.summon.serialssolutions.com/2.0.0/image/custom?url=http%3A%2F%2Fimage.cqvip.com%2Fvip1000%2Fqk%2F92722X%2F92722X.jpg http://utb.summon.serialssolutions.com/2.0.0/image/custom?url=http%3A%2F%2Fwww.wanfangdata.com.cn%2Fimages%2FPeriodicalImages%2Fhjs%2Fhjs.jpg |