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Quantum Beam Science, Volume 10, Issue 1

2026 March - 7 articles

Cover Story: Neutron instruments often employ Bragg diffraction off single crystals as monochromators or analyzers. In order to increase the integral reflectivity, one may introduce a spread of the crystallite direction, known as mosaicity, or alternatively introduce a bending in perfect crystals. This bending technique is most often used in instruments that combine high-energy resolution with focusing effects. Therefore, these instruments are most sensitive to geometrical effects, and simulations are particularly beneficial in the instrument design. An algorithm for simulating these bent crystals has previously been implemented in SIMRES, but has been absent in McStas. In this work, we close this gap by implementing diffraction from bent crystals in McStas. We compare our simulations between the two codes and find excellent agreement across a range of comparisons. View this paper
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Articles (7)

  • Article
  • Open Access
1,988 Views
20 Pages

Periodic Noise Reduction in Neutron Imaging

  • Shilin Wang,
  • Tianhao Wang,
  • Chao Zhou,
  • Sen Yang and
  • Xin Tong

Periodic structures that may exist within the neutron imaging detector can introduce periodic noise into the imaging results, directly degrading image quality and further affecting the performance of deconvolution. This periodic noise appears as four...

(This article belongs to the Section Spectroscopy Technique)
  • Feature Paper
  • Article
  • Open Access
1,773 Views
21 Pages

Simulating Neutron Diffraction from Deformed Mosaic Crystals in McStas

  • Daniel Lomholt Christensen,
  • Sandra Cabeza,
  • Thilo Pirling,
  • Kim Lefmann and
  • Jan Šaroun

Monochromator and analyzer systems that rely on bent single crystals are in use throughout the neutron scattering community. An adequate component for the simulation of such crystals was missing in the widely used neutron simulation software package...

(This article belongs to the Section Instrumentation and Facilities)
  • Review
  • Open Access
1,901 Views
17 Pages

In this paper, several optimized design results of the HTGR-based 10 MWth Reaktor Daya Eksperimental (RDE) (Experimental Power Reactor), so far conducted, are reviewed and compared from the neutronics, reactor types, refueling schemes, and fuel cycle...

(This article belongs to the Section Instrumentation and Facilities)
  • Feature Paper
  • Article
  • Open Access
1,035 Views
10 Pages

A Compact Heat Sink Compatible with a Ka-Band Gyro-TWT with Non-Superconducting Magnets

  • Shaohang Ji,
  • Boxin Dai,
  • Zewei Wu,
  • Wei Jiang and ,
  • Xin Chen,
  • Binyang Han,
  • Jianwei Zhou,
  • Qianqian Chen,
  • Guo Liu and
  • Yong Luo
  • + 7 authors+ 2 authors

This paper presents a thermal management solution for a Ka-band gyrotron traveling wave tube (gyro-TWT) with non-superconducting magnets. At present, the miniaturization and non-superconductivity of gyro-TWT have become a trend, but miniaturization l...

(This article belongs to the Section Radiation Scattering Fundamentals and Theory)
  • Review
  • Open Access
3,363 Views
22 Pages

Key Considerations for Treatment Planning System Development in Electron and Proton FLASH Radiotherapy

  • Chang Cheng,
  • Gaolong Zhang,
  • Nan Li,
  • Xinyu Hu and ,
  • Zhen Huang,
  • Xiaoyu Xu,
  • Shouping Xu and
  • Weiwei Qu
  • + 3 authors+ 0 author

The global cancer burden continues to increase worldwide. Among the various treatment options, radiotherapy (RT), which employs high-energy ionizing radiation to destroy cancer cells, is one of the primary modalities for cancer. However, increasing t...

(This article belongs to the Section Medical and Biological Applications)
  • Article
  • Open Access
1 Citations
1,549 Views
14 Pages

Temperature and Fluence Dependence Investigation of the Defect Evolution Characteristics of GaN Single Crystals Under Radiation with Ion Beam-Induced Luminescence

  • Xue Peng,
  • Wenli Jiang,
  • Ruotong Chang,
  • Hongtao Hu and ,
  • Shasha Lv,
  • Xiao Ouyang and
  • Menglin Qiu
  • + 2 authors+ 0 author

To investigate the in situ irradiation effects of gallium nitride at varying temperatures, we combined ion beam-induced luminescence spectroscopy with variable-temperature irradiation using a home-built IBIL system and a GIC4117 2 × 1.7 MV tand...

(This article belongs to the Special Issue Quantum Beam Science: Feature Papers 2025)
  • Article
  • Open Access
1,987 Views
12 Pages

At a spallation neutron source, neutron pulses of varying energies are generated, and the detection of neutrons by instrument detectors is recorded as time-of-flight from the emission of the neutron pulse to its arrival at specific detector pixels wi...

(This article belongs to the Section Instrumentation and Facilities)
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Quantum Beam Sci. - ISSN 2412-382X