Low material budget floating strip Micromegas for ion transmission radiography
Low material budget floating strip Micromegas for ion transmission radiography
复制标题
用于离子透射射线照相的低材料预算浮条 Micromegas
DOI：
10.1016/j.nima.2016.05.003
复制
发表时间：
2017
影响因子：
1.4
通讯作者：
Zibell A
中科院分区：
文献类型：
--
作者：
Bortfeldt J;Biebel O;Flierl B;Hertenberger R;Klitzner F;Lösel Ph;Magallanes L;Müller R;Parodi K;Schlüter T;Voss B;Zibell A
Micromegas是一种高精度、放电不敏感的气体探测器，能够以7 MHz/cm 2的通量跟踪单个粒子，分辨率为100 μm。我们开发了低材料预算探测器与一维条读出，适合在最高粒子率跟踪遇到的医用离子透射射线照相或内部跟踪器应用。最近，我们又开发了基于Kapton的浮动条Micromegas，具有二维条读出，总厚度为0.011X0。这些探测器在Garching的串列加速器和海德堡离子束治疗中心的高速质子和碳离子束中进行了测试，使用优化的Ne：CF 4气体混合物。通过将Micromegas探测器耦合到一种新的基于闪烁体的距离探测器，获得了PMMA和组织等效体模的离子透射射线照相。18层距离探测器通过波长移位光纤耦合到多阳极光电倍增管读出，我们给出了Micromegas探测器的定时性能和使用μTPC方法的单平面径迹重建。我们讨论了闪烁体距离望远镜的距离分辨率，并提出了组合系统的图像重建能力。
Floating strip Micromegas are high-accuracy and discharge insensitive gaseous detectors, able to track single particles at fluxes of 7 MHz/cm2with 100 μm resolution. We developed low-material-budget detectors with one-dimensional strip readout, suitable for tracking at highest particle rates as encountered in medical ion transmission radiography or inner tracker applications. Recently we additionally developed Kapton-based floating strip Micromegas with two-dimensional strip readout, featuring an overall thickness of 0.011X0.These detectors were tested in high-rate proton and carbon-ion beams at the tandem accelerator in Garching and the Heidelberg Ion-Beam Therapy Center, operated with an optimized Ne:CF4gas mixture. By coupling the Micromegas detectors to a new scintillator based range detector, ion transmission radiographies of PMMA and tissue-equivalent phantoms were acquired. The range detector with 18 layers is read out via wavelength shifting fibers, coupled to a multi-anode photomultiplier.We present the performance of the Micromegas detectors with respect to timing and single plane track reconstruction using the μTPC method. We discuss the range resolution of the scintillator range telescope and present the image reconstruction capabilities of the combined system.
高速浮条 Micromegas
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
J. Bortfeldt;M. Bender;O. Biebel;Helge Danger;B. Flierl;R. Hertenberger;P. Losel;Samuel Moll;K. Parodi;I. Rinaldi;A. Ruschke;A. Zibell
通讯作者：
A. Zibell
浮条 Micromegas 探测器
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
J. Bortfeldt
通讯作者：
J. Bortfeldt