Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献_第6页

Improved pixel-wise calibration for charge-integrating hybrid pixel detectors with performance validation 改进了电荷积分混合像素探测器的逐像素校准和性能验证

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-10 DOI: 10.1016/j.nima.2025.171227

X. Xie , A. Bergamaschi, M. Brückner, M. Carulla, R. Dinapoli, S. Ebner, K. Ferjaoui, E. Fröjdh, V. Gautam, D. Greiffenberg, S. Hasanaj, J. Heymes, V. Hinger, M. Hürst, V. Kedych, T. King, S. Li, C. Lopez-Cuenca, A. Mazzoleni, D. Mezza, J. Zhang

The MÖNCH hybrid pixel detector, with a 25

μ

m pixel pitch and fast charge-integrating readout, has demonstrated subpixel resolution capabilities, i.e., particle localization precision below the pixel pitch by exploiting the analog charge readout, for X-ray imaging and deep learning-based electron localization in electron microscopy. Fully exploiting this potential requires extensive calibration to ensure both linearity and uniformity of the pixel response, which is challenging for detectors with a large dynamic range. To overcome the limitations of conventional calibration methods, we developed an accurate and efficient correction method to achieve pixel-wise gain and nonlinearity calibration based on the backside pulsing technique. A three-dimensional lookup table, indexed by pixel X and Y coordinates and value in analog-to-digital units (ADU), was generated for all pixels across the full dynamic range, mapping the pixel response to a calibrated linear energy scale.

Compared with conventional linear calibration, the proposed method yields negligible deviations between the calibrated and nominal energies for photons and electrons. The improvement in energy resolution ranges from 4% to 22% for 15–25 keV photons and from 12% to 21% for 60–200 keV electrons. Deep learning-based electron localization demonstrates a 4% improvement in spatial resolution when using the proposed calibration method. This approach further enables rapid diagnosis of the cause of bad pixels and estimation of bump-bonding yield.

该MÖNCH混合像素探测器具有25 μm像素间距和快速电荷积分读出，具有亚像素分辨率能力，即通过利用模拟电荷读出，在x射线成像和电子显微镜中基于深度学习的电子定位中具有低于像素间距的粒子定位精度。充分利用这一潜力需要大量的校准，以确保像素响应的线性和均匀性，这对于具有大动态范围的探测器来说是具有挑战性的。为了克服传统校准方法的局限性，我们开发了一种基于反向脉冲技术的精确、高效的校正方法来实现逐像元增益和非线性校准。生成了一个三维查找表，通过像素X和Y坐标以及模拟-数字单位（ADU）的值来索引整个动态范围内的所有像素，将像素响应映射到校准的线性能量标度。与传统的线性校准相比，所提出的方法使光子和电子的校准能量与标称能量之间的偏差可以忽略不计。对于15-25 keV光子，能量分辨率的提高幅度从4%到22%不等，对于60-200 keV电子，能量分辨率的提高幅度从12%到21%不等。当使用所提出的校准方法时，基于深度学习的电子定位表明空间分辨率提高了4%。该方法进一步实现了对不良像素的原因的快速诊断和碰撞键合收率的估计。

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引用次数: 0

GALI — A GAmma-ray burst Localizing Instrument 伽玛射线暴定位仪

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-10 DOI: 10.1016/j.nima.2025.171226

Julia Saleh-Natur , Ehud Behar , Omer Reich , Shlomit Tarem , Zvika Tarem , Alexander Vdovin , Amir Feigenboim , Liron Avioz , Aleksei Klimov , Sharon Mitrani , Solomon Margolin , Avner Kaidar , Hovhannes Agalarian , Roi Rahin , Alon Osovizky , Eran Vax , Max Ghelman

γ

-ray bursts (GRBs) are the most energetic messengers of core-collapse supernovae and mergers of neutron stars. Although GRB detection has become commonplace, its accurate and timely localization remains challenging as non-focusing soft

γ

-ray detectors retain no directional information. GALI is a new instrument for localizing GRBs, based on the mutual occultation of hundreds of scintillators. The GALI concept is scalable and can fit on a small satellite. Here, we present an operational model of

\sim 1

liter with 362 scintillators that localizes an ²⁴¹Am laboratory source to

\sim 1 °

accuracy. We compare these results with simulations, which include proper sky background, predicting a GRB localization accuracy of

\sim 2^{\circ} - 3^{\circ}

in space. We demonstrate with GALI results how Poisson statistics can be used to estimate localization uncertainty confidence areas on the sky.

γ射线暴（GRBs）是核心坍缩超新星和中子星合并中能量最大的信使。虽然伽马射线暴探测已经司空见惯，但由于非聚焦软γ射线探测器没有保留方向信息，因此其准确及时的定位仍然是一个挑战。GALI是一种定位grb的新仪器，基于数百个闪烁体的相互掩星。GALI概念是可扩展的，可以安装在一颗小卫星上。在这里，我们提出了一个具有362个闪烁体的~ 1升的操作模型，该模型将241Am的实验室源定位到~ 1°精度。我们将这些结果与包含适当天空背景的模拟结果进行比较，预测GRB在空间上的定位精度为∼2°−3°。我们用GALI结果证明了如何使用泊松统计量来估计天空上的定位不确定性置信区域。

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引用次数: 0

A CMOS readout ASIC with a PVT-variation-robust pseudo resistor for radiation detectors 带pvt可变鲁棒伪电阻的CMOS读出专用集成电路，用于辐射探测器

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-10 DOI: 10.1016/j.nima.2025.171225

Gibae Nam , Jongbeom Kim , Mookyoung Yoo , Minhyeok Son , Manhyuk Choi , Inju Yu , Hajun Bin , Euiyoung Lee , Dahyun Jin , Hyoungho Ko

This paper presents a CMOS readout application-specific integrated circuit (ASIC) employing a pseudo resistor (PR) robust to process–voltage–temperature (PVT) variations for radiation detectors, ensuring stable reset operation and improved noise performance. Conventional reset techniques often suffer from nonlinear characteristics and high sensitivity to PVT variations, resulting in inconsistent discharge behavior and degraded noise performance. To address these challenges, the proposed circuit integrates a robust PR structure that employs a dedicated bias voltage generator to maintain consistent resistance across PVT variations. The readout signal path includes a charge-sensitive amplifier (CSA), a CR–RC² pulse shaper with pole-zero cancellation (PZC), and a discriminator, supporting both time and amplitude measurements from silicon detector signals. Targeting gamma rays at 30.8 keV and 81 keV from a Ba-133 radioactive check source, the system achieves an equivalent noise charge (ENC) of 169 e⁻ + 4.1 e⁻/pF. With a detector capacitance of 3 pF, the ASIC achieves an ENC of approximately 180 e⁻, corresponding to an energy resolution of 1.5 keV (full-width at half-maximum, FWHM) at 30.8 keV, equivalent to 4.9 %. Fabricated in a 0.18-μm CMOS process, the chip occupies an area of 2.45 mm × 2.45 mm and demonstrates low-noise performance suitable for compact and low-capacitance radiation detection systems.

本文提出了一种CMOS读出专用集成电路（ASIC），该电路采用对工艺电压温度（PVT）变化具有鲁棒性的伪电阻（PR），用于辐射探测器，确保稳定的复位操作并改善噪声性能。传统的复位技术往往具有非线性特性和对PVT变化的高灵敏度，导致放电行为不一致和噪声性能下降。为了应对这些挑战，该电路集成了一个强大的PR结构，该结构采用专用的偏置电压发生器来保持PVT变化时的一致电阻。读出信号路径包括一个电荷敏感放大器（CSA），一个具有极零抵消（PZC）的CR-RC2脉冲整形器和一个鉴别器，支持硅探测器信号的时间和幅度测量。针对来自Ba-133放射性检查源的30.8 keV和81 keV的伽马射线，该系统实现了169 e−+ 4.1 e−/pF的等效噪声电荷（ENC）。在检测器电容为3pf的情况下，ASIC实现了大约180 e−的ENC，对应于30.8 keV的能量分辨率为1.5 keV（半最大全宽度，FWHM），相当于4.9%。该芯片采用0.18 μm CMOS工艺制造，面积为2.45 mm × 2.45 mm，具有低噪声性能，适用于紧凑、低电容的辐射检测系统。

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引用次数: 0

Upgrade of the CAESium-iodide scintillator ARray (CAESAR) electronics and data acquisition system for optimized performance at FRIB 升级铯-碘化闪烁体阵列（CAESAR）电子和数据采集系统，以优化FRIB的性能

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-10 DOI: 10.1016/j.nima.2025.171217

S.A. Gillespie , D. Weisshaar , A. Gade

We report on the upgrade of the electronics and data acquisition (DAQ) of the high-efficiency CAESium-iodide scintillator ARray (CAESAR) at the Facility for Rare Isotope Beams (FRIB). With the on-going capability ramp-up of FRIB, CAESAR is expected to continue to be an in-demand

γ

-ray spectrometer owing to its high detection efficiency, compactness, and modularity, enabling easy integration with additional detection and DAQ systems. Within this context, the CAESAR electronics and DAQ were upgraded to remove obsolete modules, enhance the ease of integration with external instruments, and optimize the DAQ live time. We present the comprehensive results from offline (

γ

-ray sources) and online (in-beam experiment) commissioning, characterizing the performance of CAESAR’s new electronics and DAQ.

本文报道了中国科学院稀有同位素束流研究中心（FRIB）高效铯-碘化闪烁体阵列（CAESAR）的电子学和数据采集（DAQ）升级。随着FRIB能力的不断提升，CAESAR由于其高检测效率、紧凑性和模块化，能够轻松与其他检测和DAQ系统集成，预计将继续成为需求的γ射线光谱仪。在这种情况下，恺撒电子和DAQ进行了升级，以删除过时的模块，增强与外部仪器集成的便利性，并优化DAQ的使用时间。我们介绍了离线（γ射线源）和在线（光束内实验）调试的综合结果，表征了CAESAR的新电子设备和DAQ的性能。

引用次数: 0

LaBr3: Ce self-activation analysis for measuring fast neutron fields LaBr3：用于测量快中子场的Ce自激活分析

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-10 DOI: 10.1016/j.nima.2025.171223

Caryanne R. Wilson , Oskar Searfus , Valentin Fondement , Colton Graham , Xianfei Wen , Shaun D. Clarke , Sara A. Pozzi , Igor Jovanovic

Measurement of the fast neutron production rate in deuterium–tritium (D–T) fusion reactions is important for applications such as active interrogation, fusion diagnostics, and borehole logging. Such measurements are typically performed by neutron activation analysis of metal foils, especially copper. Copper foil activation analysis requires efficiency and energy calibrations of the detector used to measure the foil, and it relies on the detection of 511 keV gamma rays, which are prominent in the active background when neutrons are being produced. Alternatives, such as

^{79 m}

Br produced by inelastic neutron scattering on ⁷⁹Br, are limited by short half-life, low-energy gamma emission, and inability to selectively measure D–T neutrons. This work describes a novel alternative approach to measure

≳

10 MeV neutron fields based on self-activation analysis of a LaBr

_{3}

:Ce detector. The activity of ⁷⁸Br, the activation product of the ⁷⁹Br(n,2n)⁷⁸Br reaction, is used to determine the neutron flux and infer the neutron production rate. We experimentally demonstrate the method with a cylindrical LaBr

_{3}

:Ce crystal with a diameter and height of 3.81 cm that was placed at an

\sim

18 cm distance from the neutron production point, at a 90° angle with respect to the deuteron beam in a D–T neutron generator. Operating voltage and current of the generator were adjusted to evaluate the technique’s performance over a nominal generator output range of approximately

(1 - 9) \times 1 0^{7}

n/s. The neutron output obtained from LaBr

_{3}

:Ce activation agrees to within three standard deviations of the output obtained using copper activation. The self-activation technique can be conveniently employed in a variety of applications to simplify measurements of fast neutrons produced in D–T fusion reactions.

氘-氚（D-T）聚变反应中快中子产生速率的测量对于主动探测、聚变诊断和井眼测井等应用非常重要。这种测量通常是通过对金属箔，特别是铜的中子活化分析来进行的。铜箔活化分析需要用于测量铜箔的探测器的效率和能量校准，并且它依赖于511 keV伽马射线的检测，当中子产生时，这些伽马射线在活动背景中很突出。其他选择，如79mBr，由79Br上的非弹性中子散射产生，受半衰期短、低能量伽马辐射和无法选择性测量D-T中子的限制。这项工作描述了一种基于LaBr3:Ce探测器自激活分析的测量约10 MeV中子场的新方法。利用79Br(n,2n)78Br反应的活化产物78Br的活度来确定中子通量并推断中子产生率。我们用直径和高度为3.81 cm的圆柱形LaBr3:Ce晶体实验证明了该方法，该晶体被放置在距离中子产生点约18 cm的地方，与D-T中子发生器中的氘核束成90°角。调整发电机的工作电压和电流，以评估该技术在约（1−9）×107 n/s的标称发电机输出范围内的性能。LaBr3:Ce活化得到的中子输出与铜活化得到的输出在三个标准差以内。自激活技术可以方便地应用于各种应用中，以简化D-T聚变反应中产生的快中子的测量。

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引用次数: 0

Crystal growth, scintillation properties & fast neutron-gamma discrimination of cubic halide perovskite CsCaCl3:(Eu2+, Tl+) 立方卤化物钙钛矿CsCaCl3:（Eu2+, Tl+）的晶体生长、闪烁特性及快中子- γ判别

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-09 DOI: 10.1016/j.nima.2025.171224

Kimberly S. Pestovich , Luis Stand , Govinda Adhikari , Ketaki Joshi , Xianfei Wen , Lakshmi S. Pandian , Charles L. Melcher , Edgar van Loef , Mariya Zhuravleva

The vast variety of nuclear security applications require radiation detection materials tailored to their operational needs. A scintillator's properties are strongly influenced by the choice of luminescent dopant, which facilitates customization to different applications. In this work, transparent Ø12 mm single crystals of undoped CsCaCl₃, CsCaCl₃:1 % Eu, CsCaCl₃:1 % Tl, and CsCaCl₃:1 % Eu, 1 % Tl were grown via the Vertical Bridgman method. Their scintillation properties and fast neutron-gamma discrimination capabilities were investigated. Undoped CsCaCl₃ had a light yield of 2500 ph/MeV, which is the highest reported to date for this CVL material. The incorporation of Eu²⁺ or Tl ⁺ into CsCaCl₃ as luminescence centers resulted in significantly higher light yields of ∼16,000 ph/MeV and energy resolutions of ∼8 % at 662 keV. Compared to the single dopant counterparts, CsCaCl₃:Eu, Tl had significantly suppressed afterglow; however, this came at the cost of reduced light yield. Among the materials tested, only CsCaCl₃:Tl showed effective fast neutron and gamma discrimination capabilities, achieving a Figure of Merit of 3.2 between gamma-rays and fast neutron captures that produce protons and 1.6 between gamma-rays and fast neutron captures that produce alpha particles.

各种各样的核安全应用需要根据其操作需求量身定制辐射探测材料。发光掺杂剂的选择对闪烁体的性能有很大的影响，这有利于根据不同的应用进行定制。本文采用垂直桥人法生长了未掺杂CsCaCl3、CsCaCl3: 1% Eu、CsCaCl3: 1% Tl和CsCaCl3: 1% Eu、1% Tl的Ø12 mm透明单晶。研究了它们的闪烁特性和快中子识别能力。未掺杂的CsCaCl3的光产率为2500 ph/MeV，这是迄今为止报道的该CVL材料的最高产率。在CsCaCl3中加入Eu2+或Tl +作为发光中心，在662 keV下的产光率达到了~ 16000 ph/MeV，能量分辨率达到了~ 8%。与单一掺杂相比，CsCaCl3:Eu， Tl对余辉有明显抑制作用；然而，这是以降低光产率为代价的。在测试的材料中，只有CsCaCl3:Tl表现出有效的快中子和伽马识别能力，在产生质子的伽马射线和快中子捕获之间达到3.2的优值，在产生α粒子的伽马射线和快中子捕获之间达到1.6的优值。

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引用次数: 0

Calibration of the HERD calorimeter with an IsCMOS camera readout system with the CERN SPS test beam 用欧洲核子研究中心SPS测试光束校准带有IsCMOS相机读出系统的HERD量热计

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-09 DOI: 10.1016/j.nima.2025.171222

Z. Quan , Y.W. Dong , M. Xu , T.W. Bao , R.J. Wang , Z.G. Wang , X. Liu , C.L. Liao , J.Y. Sun , X.F. Tang , Q. Wu , J.J. Wang , X.G. Yang , Y.L. Bai , W.W. Cao , X.Q. Cong , L. Chang , J.R. Gao , Y.G. Huang , Z.X. Hu , B.H. Liu

Precise measurements of cosmic-rays at previously unexplored energies are crucial for understanding cosmic-ray physics. The High Energy cosmic Radiation Detection facility (HERD), a space-based experiment scheduled to be installed on the China Space Station in 2028, is designed for dark matter exploration, cosmic-ray analysis, and gamma-ray monitoring. The core detector of HERD is a high granularity, homogeneous, three-dimensional imaging calorimeter, providing precise energy measurements up to several PeV and effective electron–proton separation. Thanks to its innovative geometry, HERD has a large acceptance and is capable of detecting particles from all directions. The calorimeter contains two independent readout systems: wavelength shifting fibers coupled to image intensified scientific complementary Metal–Oxide–Semiconductor cameras, and photodiodes. A prototype of the calorimeter was tested at CERN’s Super Proton Synchrotron in 2024. This paper presents a calibration method developed for the camera-based readout system. The method is validated through electron beam energy reconstruction. The result shows the calorimeter response linearity is better than

\pm 1 %

from 50 GeV to 196 GeV, demonstrating the effectiveness of the method.

精确测量宇宙射线以前未被探索的能量对于理解宇宙射线物理学至关重要。高能宇宙辐射探测设施（HERD）是一个天基实验，计划于2028年安装在中国空间站上，用于暗物质探测、宇宙射线分析和伽马射线监测。HERD的核心探测器是一个高粒度，均匀，三维成像量热计，提供精确的能量测量高达几个PeV和有效的电子-质子分离。由于其创新的几何结构，HERD具有很大的接受度，并且能够从各个方向检测粒子。量热计包含两个独立的读出系统：波长移动光纤耦合到图像增强科学互补金属氧化物半导体相机和光电二极管。热量计的原型于2024年在欧洲核子研究中心的超级质子同步加速器上进行了测试。本文提出了一种基于摄像机的读出系统标定方法。通过电子束能量重构验证了该方法的有效性。结果表明，在50 ~ 196 GeV范围内，量热计的响应线性度优于±1%，证明了该方法的有效性。

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引用次数: 0

Design and implementation of the constant fraction discriminator for glass MRPC timing 玻璃MRPC定时恒分数鉴别器的设计与实现

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-06 DOI: 10.1016/j.nima.2025.171221

L.L. Kurchaninov , E.A. Ladygin , V.P. Ladygin , A.A. Semak

The analog front-end electronics based on the constant fraction discrimination method is designed and optimized for the Multigap Resistive Plate Chamber (MRPC) timing measurements. The total time resolution of

\sim

40 ps has been obtained for 10 and 12 gaps MRPCs using cosmic setup and a muon beam at the IHEP U-70 accelerator in Protvino, which complies with the conditions of the Spin Physics Detector (SPD) experiment at NICA.

针对多间隙电阻板腔（MRPC）定时测量，设计并优化了基于恒分数判别法的模拟前端电子器件。在质子加速器U-70上使用宇宙装置和μ介子束，获得了10和12个间隙mrpc的总时间分辨率为~ 40 ps，符合NICA自旋物理探测器（SPD）实验的条件。

引用次数: 0

Investigating deep level defects in neutron-irradiated large size 4H-SiC vertical Schottky barrier diodes 中子辐照大尺寸4H-SiC垂直肖特基势垒二极管的深能级缺陷研究

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-06 DOI: 10.1016/j.nima.2025.171215

Guangze Zeng , An Ji , Yong Wang

Large size four-anode vertical Schottky barrier diodes (SBDs) based on 4H-SiC epitaxial were fabricated and studied. The electrical properties of SBDs and effects of neutron irradiation (up to 3 × 10¹³ n/cm², with energy equivalent to 1 MeV), were evaluated by current-voltage (I-V) measurements, theoretical calculations, and deep level transient spectroscopy (DLTS). At lower neutron irradiation fluences, the electrical characteristics of the devices showed minimal degradation, highlighting the potential advantages of 4H-SiC as a material for power devices in neutron radiation environments. After 3 × 10¹³ n/cm² neutron irradiation, the device exhibited a significant loss of rectification properties, indicating severe damage to its Schottky barrier. Defects in 4H-SiC (such as Z_1/2, EH₃, EH_6/7) at a neutron fluence of 5 × 10¹¹ n/cm² were quantitatively investigated based on DLTS results. Furthermore, the significant increase of neutron-induced EH₃ defects is observed for the first time in 4H-SiC SBDs. These findings provide valuable reference for the reliable application of 4H-SiC devices in neutron and other hadron (such as proton) environments.

制备了基于4H-SiC外延的大尺寸四阳极垂直肖特基势垒二极管（sdd）。通过电流-电压（I-V）测量、理论计算和深能级瞬态光谱（DLTS）评估了sdd的电学特性和中子辐照（高达3 × 1013 n/cm2，能量相当于1 MeV）的效应。在较低的中子辐照影响下，器件的电学特性表现出最小的退化，突出了4H-SiC作为中子辐射环境中功率器件材料的潜在优势。经过3 × 1013 n/cm2的中子辐照后，器件表现出明显的整流性能损失，表明其肖特基势垒严重损坏。基于DLTS结果定量研究了中子通量为5 × 1011 n/cm2时的4H-SiC（如Z1/2、EH3、EH6/7）缺陷。此外，在4H-SiC sdd中首次观察到中子诱导EH3缺陷的显著增加。这些发现为4H-SiC器件在中子和其他强子（如质子）环境中的可靠应用提供了有价值的参考。

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引用次数: 0

A high-voltage MR-ToF mass spectrometer and separator for the study of exotic isotopes at FRIB 一种高压MR-ToF质谱计和分离器，用于研究FRIB的外来同位素

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment

Pub Date : 2025-12-06 DOI: 10.1016/j.nima.2025.171220

F.M. Maier , C.M. Ireland , G. Bollen , E. Dhayal , T. Fowler-Davis , E. Leistenschneider , M.P. Reiter , R. Ringle , S. Schwarz , A. Sjaarda

The Facility for Rare Isotope Beams (FRIB) delivers a wide variety of rare isotopes as fast, stopped, or reaccelerated beams to enable forefront research in nuclear structure, astrophysics, and fundamental interactions. To expand the scientific potential of FRIB’s stopped and reaccelerated beam programs, we are designing a Multi-Reflection Time-of-Flight mass spectrometer and separator (MR-ToF MS). It will enable high-precision mass measurements of short-lived isotopes, improve beam diagnostics, and deliver isobarically and isomerically purified beams to downstream experimental stations. It is designed to store ions at a kinetic energy of 30 keV, significantly enhancing ion throughput while maintaining high mass resolving power. We present the scientific motivation, technical design, and simulations demonstrating the expected performance of the system, which has the potential to significantly enhance FRIB’s mass measurement, diagnostic, and mass separation capabilities.

稀有同位素光束设施（FRIB）提供各种稀有同位素的快速、停止或再加速光束，使核结构、天体物理学和基本相互作用的前沿研究成为可能。为了扩大FRIB停止和再加速束流项目的科学潜力，我们正在设计一种多反射飞行时间质谱仪和分离器（MR-ToF MS）。它将实现短寿命同位素的高精度质量测量，改进光束诊断，并向下游实验站提供等压和等异构纯化光束。它被设计成以30 keV的动能存储离子，在保持高质量分辨能力的同时显著提高离子吞吐量。我们介绍了该系统的科学动机、技术设计和模拟，证明了该系统的预期性能，该系统有可能显著提高FRIB的质量测量、诊断和质量分离能力。

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引用次数: 0