Achieving high spatial resolution using a microchannel plate detector with an economic and scalable approach

Wiggins, B.B.; deSouza, Z.O.; Vadas, J.; Alexander, Andrew; Hudan, S.; deSouza, Romualdo

doi:10.1016/j.nima.2017.08.032

Cited by 9 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microchannel plate (MCP) is a high aspect ratio porous lead-silicate glass array structure with electron multiplication properties. With the rapid development of modern science and technology, its application scope has been broadened such as particle detection and micro-optical imaging [1][2][3][4][5][6][7][8] , and the demand for detector performance has been increasing, while MCP is facing problems such as high background noise and low gain, which have restricted the s further development. Studies of the gain and noise performance of microchannel plates have identi ed numerous factors affecting noise and gain, among them the reduction of the signi cant background noise caused by radioisotopes (potassium and rubidium) in photodetector devices by reducing the 40K content in the glass material [9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Micro-optical Morphology and Electrical Properties of Microchannel Plates by Acid–Base Alternating Corrosion Processes

Li,

Cong,

Wang

et al. 2023

Silicon

View full text Add to dashboard Cite

As a two-dimensional vacuum electron multiplier device, the microchannel plate is made by solid method with lead silicate glass as the base material, and acid-base etching to remove the core material is a key step in the formation of the microchannel plate, which mainly affects the microstructure, morphology and composition of the inner wall surface, and then affects the electrical properties of the microchannel plate.The microscopic morphology of silicate glass under different etching processes was studied by scanning electron microscopy, and it was found that with the increase of acid-base alternation during the etching process, the particle density of the inner wall of the channel gradually decreased, and the energy spectrum analysis of the particles revealed that the main contents were Pb and Bi; further by AFM analysis, the particle peak height was reduced from 31.1 nm to 1.9 nm with roughness. The results of the electrical and noise properties of the microchannel plates show that an appropriate increase in acid-base alternation can effectively reduce the bulk resistance and dark current without reducing the gain of the microchannel plates. This shows that increasing the "erosion intensity" of the acid-base alternation multiple times during corrosion can effectively improve the core-skin diffusion layer, further affecting the physical and chemical transformation of the nanoscale morphology, pointing to a new direction for improving the electrical properties of microchannel plates made of silicate glass.

show abstract

Section: Introductionmentioning

confidence: 99%

Mechanistic Study on the Micro-optical Morphology and Electrical Properties of Microchannel Plates by Acid–Base Alternating Corrosion Processes

Li,

Cong,

Wang

et al. 2023

Silicon

View full text Add to dashboard Cite

show abstract

“…An MCP sense wire (MCP-SW) detector using a delay line readout has been utilized to achieve a spatial resolution of approximately 200 µm FWHM [ 13 , 14 ]. However, the manufacturing process is relatively complex and improved material properties are required.…”

Section: Introductionmentioning

confidence: 99%

Photon Counting Imaging with Low Noise and a Wide Dynamic Range for Aurora Observations

Han

Song

Zhang

et al. 2020

Sensors

View full text Add to dashboard Cite

The radiation intensity of observed auroras in the far-ultraviolet (FUV) band varies dramatically with location for aerospace applications, requiring a photon counting imaging apparatus with a wide dynamic range. However, combining high spatial resolution imaging with high event rates is technically challenging. We developed an FUV photon counting imaging system for aurora observation. Our system mainly consists of a microchannel plate (MCP) stack readout using a wedge strip anode (WSA) with charge induction and high-speed electronics, such as a charge sensitive amplifier (CSA) and pulse shaper. Moreover, we constructed an anode readout model and a time response model for readout circuits to investigate the counting error in high counting rate applications. This system supports global rates of 500 kilo counts, 0.610 dark counts s−1 cm−2 at an ambient temperature of 300 K and 111 µm spatial resolution at 400 kilo counts s−1 (kcps). We demonstrate an obvious photon count loss at incident intensities close to the counting capacity of the system. To preserve image quality, the response time should be improved and some noise performance may be sacrificed. Finally, we also describe the correlation between counting rate and imaging resolution, which further guides the design of space observation instruments.

show abstract

“…Lead silicate glass is particularly useful for the manufacture of a microchannel plate (MCP), which is a special designed two dimensional array of microscopic channels for charge particles multiplied, has been widely used in astronomical, biological imaging, nuclear science and weak signal detection applications [1,2,3,4,5,6,7,8]. The core and clad lead silicate glasses formed the microchannel structure after drawing into fibers, assembling to bundle, fusing, slicing and polishing to wafers and wet chemically etching to remove the cores.…”

Section: Introductionmentioning

confidence: 99%

Reduction Temperature-Dependent Nanoscale Morphological Transformation and Electrical Conductivity of Silicate Glass Microchannel Plate

et al. 2019

View full text Add to dashboard Cite

Lead silicate glasses are fundamental materials to a microchannel plate (MCP), which is a two dimensional array of a microscopic channel charge particle multiplier. Hydrogen reduction is the core stage to determine the electrical conductivity of lead silicate glass MCP multipliers. The nanoscale morphologies and microscopic potential distributions of silicate glass at different reduction temperatures were investigated via atomic force microscope (AFM) and Kelvin force microscopy (KFM). We found that the bulk resistance of MCPs ballooned exponentially with the spacing of conducting islands. Moreover, bulk resistance and the spacing of conducting islands both have the BiDoseResp trend dependence on the hydrogen reduction temperature. Elements composition and valence states of lead silicate glass were characterized by X-ray photoelectron spectroscopy (XPS). The results indicated that the conducting island was an assemblage of the Pb atom originated from the reduction of Pb2+ and Pb4+. Thus, this showed the important influence of the hydrogen temperature and nanoscale morphological transformation on modulating the physical effects of MCPs, and opened up new possibilities to characterize the nanoscale electronic performance of multiphase silicate glass.

show abstract

Achieving high spatial resolution using a microchannel plate detector with an economic and scalable approach

Cited by 9 publications

References 22 publications

Mechanistic Study on the Micro-optical Morphology and Electrical Properties of Microchannel Plates by Acid–Base Alternating Corrosion Processes

Mechanistic Study on the Micro-optical Morphology and Electrical Properties of Microchannel Plates by Acid–Base Alternating Corrosion Processes

Photon Counting Imaging with Low Noise and a Wide Dynamic Range for Aurora Observations

Reduction Temperature-Dependent Nanoscale Morphological Transformation and Electrical Conductivity of Silicate Glass Microchannel Plate

Contact Info

Product

Resources

About