Background events in microchannel plates

O.H.W. Siegmund; J. Vallerga; B. Wargelin

doi:10.1109/23.12778

Focusing of Long-Wavelength X-Rays by Means of Spherical and Planar Microchannel Plates

JETP Letters ◽

10.1134/s0021364020150072 ◽

2020 ◽

Vol 112 (3) ◽

pp. 138-144

Author(s):

M. I. Mazuritskiy ◽

A. M. Lerer

Keyword(s):

X Rays ◽

Long Wavelength ◽

Microchannel Plates

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Long-lived light neutralinos at Belle II

Journal of High Energy Physics ◽

10.1007/jhep02(2021)211 ◽

2021 ◽

Vol 2021 (2) ◽

Author(s):

Sourav Dey ◽

Claudio O. Dib ◽

Juan Carlos Helo ◽

Minakshi Nayak ◽

Nicolás A. Neill ◽

...

Keyword(s):

Monte Carlo ◽

Monte Carlo Simulations ◽

Parameter Space ◽

Rare Decays ◽

Final States ◽

Charged Pions ◽

Belle Ii ◽

Background Events ◽

Displaced Vertex

Abstract We consider light neutralinos of mass about 1 GeV, produced from τ lepton rare decays at Belle II, in the context of R-parity-violating (RPV) supersymmetry. With large and clean samples of τ leptons produced at the Belle II experiment, excellent sensitivity to such light neutralinos with the exotic signatures of displaced vertices is expected. We focus on two benchmark scenarios of single RPV operators, $$ {\lambda}_{311}^{\prime }{L}_3{Q}_1{\overline{D}}_1 $$ λ 311 ′ L 3 Q 1 D ¯ 1 and $$ {\lambda}_{312}^{\prime }{L}_3{Q}_1{\overline{D}}_2 $$ λ 312 ′ L 3 Q 1 D ¯ 2 , which induce both the production and decay of the lightest neutralino. For the reconstruction of a displaced vertex, we require at least two charged pions in the final states. We perform Monte-Carlo simulations for both signal and background events, and find that Belle II can explore regions in the parameter space competitive with other probes. In particular, for the $$ {\lambda}_{311}^{\prime } $$ λ 311 ′ scenario, it can put limits up to two orders of magnitude stronger than the current bounds.

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Effect of Hydrogen Reduction on Properties of Lead Silicate Glass for Microchannel Plates

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/423/1/012167 ◽

2018 ◽

Vol 423 ◽

pp. 012167

Author(s):

Yang Zhang ◽

Yong Sun ◽

Jiuwang Wang ◽

Kangsheng Huang ◽

Yun Wang ◽

...

Keyword(s):

Silicate Glass ◽

Hydrogen Reduction ◽

Lead Silicate ◽

Lead Silicate Glass ◽

Microchannel Plates

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Fabrication of nanocomposite electrode based on Bi4Nd Ti3O12 perovskite supported by silicon microchannel plates for high performance electrochemical capacitors

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2014.09.095 ◽

2015 ◽

Vol 619 ◽

pp. 748-753 ◽

Cited By ~ 7

Author(s):

Fengjuan Miao ◽

Bairui Tao ◽

Paul K. Chu

Keyword(s):

High Performance ◽

Electrochemical Capacitors ◽

Microchannel Plates

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Synchrotron-based spectroscopy of X-ray channeling through hollow capillary microchannels inside glass plates

Journal of Synchrotron Radiation ◽

10.1107/s0909049511043263 ◽

2011 ◽

Vol 19 (1) ◽

pp. 129-131 ◽

Cited By ~ 16

Author(s):

M. I. Mazuritskiy

Keyword(s):

Synchrotron Radiation ◽

Electronic States ◽

Capillary Surface ◽

Glass Capillary ◽

Hollow Glass ◽

X Ray ◽

Microchannel Plates ◽

Fluorescence Radiation ◽

Fine Structures ◽

Channeling Radiation

Here, soft X-ray synchrotron radiation transmitted through microchannel plates is studied experimentally. Fine structures of reflection and XANES SiL-edge spectra detected on the exit of silicon glass microcapillary structures under conditions of total X-ray reflection are presented and analyzed. The phenomenon of the interaction of channeling radiation with unoccupied electronic states and propagation of X-ray fluorescence excited in the microchannels is revealed. Investigations of the interaction of monochromatic radiation with the inner-shell capillary surface and propagation of fluorescence radiation through hollow glass capillary waveguides contribute to the development of novel X-ray focusing devices in the future.

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