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  4. Optimizing Photon Capture: Advancements in AMCP Technology for Enhanced Timing and Photon Detection Efficiency
 
preprint

Optimizing Photon Capture: Advancements in AMCP Technology for Enhanced Timing and Photon Detection Efficiency

Frey, Samira
•
Antognini, Luca
•
Benserhir, Jad  
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August 19, 2024

Hydrogenated amorphous silicon based microchannel plates (AMCPs) provide unique advantages over conventional glass-based microchannel plates, offering enhanced flexibility in manufacturing and vertical integration with an electronic readout. A high single-channel gain of 1500 could be measured in the latest generation, making them an attractive choice for a wide range of applications, including medical imaging, mass spectrometry, and particle physics experiments. A time resolution of 4.6±0.1ps (FWHM) was measured when an AMCP was connected to an amplifier and exposed to a high photoelectron flux. By decreasing the flux of photoelectrons to roughly a few hundred to thousands, this value increased to 12.6±0.2ps (FWHM). By shortening the distance between the detector and a low noise amplifier, noise on the signal could be significantly reduced, and time resolutions below 10ps were measured even for low fluxes and signal amplitudes. While single-particle detection remains a challenge, our results highlight the exceptional potential of AMCPs in achieving outstanding timing resolution. Additionally, AMCPs with a funnel-shaped channel opening are presented as well, allowing for an active area of the detector of 95% and an electron detection efficiency above 92%, respectively. This novel design has been successfully fabricated and subjected to preliminary testing, showing promising results.

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Type
preprint
DOI
10.21203/rs.3.rs-4466967/v1
Author(s)
Frey, Samira

Thinfilm (Sweden)

Antognini, Luca

University of Bern

Benserhir, Jad  

EPFL

Ripiccini, E.  

EPFL

de Koning, Coenraad

University of Bern

Riedo, Andreas

University of Bern

Belhaj, Mohamed

Office National d'Études et de Recherches Aérospatiales

Charbon, Edoardo  

EPFL

Ballif, Christophe  

EPFL

Wyrsch, Nicolas  

EPFL

Date Issued

2024-08-19

Publisher

Research Square Platform LLC

Subjects

Amorphous Silicon

•

Deep Reactive Ion Etching

•

Detection Eciency

•

Funnels

•

Microchannel Plates

•

Monolithic Integration

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Spatial Resolution

•

Timing Resolution

•

Vacuum Detectors

Written at

EPFL

EPFL units
AQUA  
Available on Infoscience
December 23, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/257262
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