- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

摘要

本文采用玻璃毛细管产生了大气环境中工作的2.5 MeV质子外束微束, 并对束斑直径及能量分布随玻璃毛细管与束流方向之间角度(倾角)变化进行测量. 测量结果表明, 在玻璃毛细管轴向与束流方向一致时(倾角为0°), 产生的微束中存在保持初始入射能量的直接穿透部分以及散射部分, 其中直接穿透的质子占比最大, 束斑直径也最大. 随着玻璃毛细管倾角的增大, 当其大于几何张角时, 束斑直径变小, 产生的微束全部为能量减小的散射部分, 直接穿透质子消失. 我们对质子在玻璃毛细管内传输时的内壁散射过程进行了模拟计算及离子轨迹分析, 发现大角度的散射部分决定了形成的外束微束斑外围轮廓, 而束斑中心区域由不与毛细管内壁产生任何作用的直接穿透离子构成, 其大小由玻璃毛细管出口直径以及几何容许张角决定. 采用玻璃毛细管产生的外束微束具有产生简单廉价, 微束区域定位简单的特点, 有望在辐射生物学、医学、材料等领域得到广泛应用.

关键词:

Abstract

Traditionally, ion microbeam is produced by focusing or/and collimating to reduce the beam size to submicron level. The traditional setup for producing the microbeam consists of an expensive focusing and collimating system with a large space, based on electromagnetic fields. Meanwhile, the microbeam obtained through pure collimation of metal micro-tubes is limited by the fabrication processing, i.e. the size of beam spot is largely limited to a few microns and its manufacture is not as simple as that of a glass capillary. Inspired by early studies of the guiding effect, the use of inexpensive and easy-to-make glass capillaries as the tool for ion external microbeam production has become a new direction. In this work, we use a glass capillary with an open outlet (108 μm in diameter), which serves as a vacuum differential and collimating component, to produce a 2.5 MeV-proton microbeam directly from the linear accelerator into the atmosphere for measurements. We measure the beam spot diameter and energy distribution of the microbeam as a function of the tilt angle of the capillary. We also conduct calculations and ion trajectory analysis on the scattering process of 2.5 MeV protons on the inner walls. The measurement results show that when the tilt angle is around 0°, there are a direct transmission part that maintains the initial incident energy, and a scattering part with the energy loss in the microbeam. It is found that the proportion of directly transmitted protons and the beam spot size are highest near zero tilt angle. As the tilt angle increases, the beam spot diameter decreases; when the tilt angle is greater than the geometric angle, all the microbeams come from the scattering with the energy loss. The simulation combined with the ion trajectory analysis based on the scattering process can explain the experimental results. It is found that the large angle scattering determines the entire external microbeam spot, and the central region of the beam spot is composed of directly penetrating ions, whose size is determined by the geometric shape of the glass capillary, i.e. the outlet diameter and aspect ratio. The natural advantage of producing external micobeames easily and inexpensively through glass capillaries is their relative safety and stable operation, and the last but not least point is to simply locate the microbeams on the sample without complex diagnostic tools. The microbeams are expected to be widely used in fields such as radiation biology, medicine, and materials.

Keywords:

作者及机构信息

1.
2.
3.
4.
5.
6.
7.
8.

通信作者:张红强,zhanghq@lzu.edu.cn

基金项目:国家自然科学基金 (批准号: U1732269)、中央高校基本科研业务费 (批准号: lzujbky-2021-sp41)、广东省普通高校重点项目(批准号: 2022ZDZX3028)、广东省基础与应用基础研究基金(批准号: 2022B1515120051)和广东省教育厅重点建设学科项目(批准号: 2022ZDJS055)资助的课题.

Authors and contacts

1.
2.
3.
4.
5.
6.
7.
8.

Corresponding author:Zhang Hong-Qiang,zhanghq@lzu.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant No. U1732269), the Fundamental Research Funds for the Central Universities, China (Grant No. lzujbky-2021-sp41), the Key Projects of Ordinary Universities in Guangdong Province, China (Grant No. 2022ZDZX3028), the Key Projects of Guangdong Basic and Applied Basic Research Foundation, China (Grant No. 2022B1515120051), and the Key Discipline Research Ability Improvement Project of Guangdong Provincial Department of Education, China (Grant No. 2022ZDJS055).

文章全文: translate this paragraph

参考文献

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]
[45]
[46]
[47]
[48]
[49]
[50]
[51]
[52]
[53]
[54]
[55]
[56]
[57]
[58]

施引文献

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]
[43]
[44]
[45]
[46]
[47]
[48]
[49]
[50]
[51]
[52]
[53]
[54]
[55]
[56]
[57]
[58]

[1]	石志奇, 何晓, 刘琳, 陈德华, 王秀明.毛细管压力作用下的非饱和双重孔隙介质中弹性波传播. 必威体育下载 , 2023, 72(6): 069101.doi:10.7498/aps.72.20222063
[2]	祝昕哲, 李博原, 刘峰, 李建龙, 毕择武, 鲁林, 远晓辉, 闫文超, 陈民, 陈黎明, 盛政明, 张杰.面向激光等离子体尾波加速的毛细管放电实验研究. 必威体育下载 , 2022, 71(9): 095202.doi:10.7498/aps.71.20212435
[3]	周腊珍, 夏文静, 许倩倩, 陈赞, 李坊佐, 刘志国, 孙天希.一种基于毛细管X光透镜的微型锥束CT扫描仪. 必威体育下载 , 2022, 71(9): 090701.doi:10.7498/aps.71.20212195
[4]	王亚楠, 任林渊, 丁卫东, 孙安邦, 耿金越.腔体结构参数对毛细管放电型脉冲等离子体推力器放电特性的影响. 必威体育下载 , 2021, 70(23): 235204.doi:10.7498/aps.70.20211198
[5]	韩金华, 郭刚, 刘建成, 隋丽, 孔福全, 肖舒颜, 覃英参, 张艳文.100 MeV质子双环双散射体扩束方案设计. 必威体育下载 , 2019, 68(5): 054104.doi:10.7498/aps.68.20181787
[6]	姜其立, 段泽明, 帅麒麟, 李融武, 潘秋丽, 程琳.一种毛细管聚焦的微束X射线衍射仪. 必威体育下载 , 2019, 68(24): 240701.doi:10.7498/aps.68.20190497
[7]	田永顺, 胡志良, 童剑飞, 陈俊阳, 彭向阳, 梁天骄.基于3.5 MeV射频四极质子加速器硼中子俘获治疗装置的束流整形体设计. 必威体育下载 , 2018, 67(14): 142801.doi:10.7498/aps.67.20180380
[8]	刘涛, 赵永蓬, 丁宇洁, 李小强, 崔怀愈, 姜杉.毛细管放电类氖氩69.8 nm激光增益特性研究. 必威体育下载 , 2017, 66(15): 155201.doi:10.7498/aps.66.155201
[9]	赵永蓬, 李连波, 崔怀愈, 姜杉, 刘涛, 张文红, 李伟.毛细管放电69.8nm激光强度空间分布特性研究. 必威体育下载 , 2016, 65(9): 095201.doi:10.7498/aps.65.095201
[10]	邓佳川, 赵永涛, 程锐, 周贤明, 彭海波, 王瑜玉, 雷瑜, 刘世东, 孙渊博, 任洁茹, 肖家浩, 麻礼东, 肖国青, R. Gavrilin, S. Savin, A. Golubev, D. H. H. Hoffmann.低能质子束在氢等离子体中的能损研究. 必威体育下载 , 2015, 64(14): 145202.doi:10.7498/aps.64.145202
[11]	周宏伟, 王林伟, 徐升华, 孙祉伟.微重力条件下与容器连通的毛细管中的毛细流动研究. 必威体育下载 , 2015, 64(12): 124703.doi:10.7498/aps.64.124703
[12]	员美娟, 郑伟, 李云宝, 李钰.单毛细管中赫切尔-巴尔克莱流体的分形分析. 必威体育下载 , 2012, 61(16): 164701.doi:10.7498/aps.61.164701
[13]	董克攻, 吴玉迟, 郑无敌, 朱斌, 曹磊峰, 何颖玲, 马占南, 刘红杰, 洪伟, 周维民, 赵宗清, 焦春晔, 温贤伦, 魏来, 臧华平, 余金清, 谷渝秋, 张保汉, 王晓方.充气型放电毛细管的密度测量及磁流体模拟. 必威体育下载 , 2011, 60(9): 095202.doi:10.7498/aps.60.095202
[14]	黄文同, 李寿哲, 王德真, 马腾才.大气压下绝缘毛细管内等离子体放电及其特性研究. 必威体育下载 , 2010, 59(6): 4110-4116.doi:10.7498/aps.59.4110
[15]	郭铁英, 娄淑琴, 李宏雷, 简水生.用于制作光子晶体光纤的毛细管的拉制理论与实验分析. 必威体育下载 , 2009, 58(7): 4724-4730.doi:10.7498/aps.58.4724
[16]	韦中超, 戴峭峰, 汪河洲.毛细管中柱对称类面心结构胶体晶体的光谱特性. 必威体育下载 , 2006, 55(2): 733-736.doi:10.7498/aps.55.733
[17]	曹士英, 王颖, 张志刚, 柴路, 王清月, 杨建军, 朱晓农.空心毛细管束缚高压气体成丝的光谱演变. 必威体育下载 , 2006, 55(9): 4734-4738.doi:10.7498/aps.55.4734
[18]	孙姣, 张家良, 王德真, 马腾才.一种新型大气压毛细管介质阻挡放电冷等离子体射流技术. 必威体育下载 , 2006, 55(1): 344-350.doi:10.7498/aps.55.344
[19]	赵永蓬, 程元丽, 王骐, 林靖, 崛田荣喜.毛细管放电激励软x射线激光的产生时间. 必威体育下载 , 2005, 54(6): 2731-2734.doi:10.7498/aps.54.2731
[20]	程元丽, 栾伯含, 吴寅初, 赵永蓬, 王骐, 郑无敌, 彭惠民, 杨大为.预脉冲在毛细管快放电软x射线激光中的作用. 必威体育下载 , 2005, 54(10): 4979-4984.doi:10.7498/aps.54.4979

计量

文章访问数:1535
PDF下载量:136
被引次数:0

搜索

留言板