Designed a photomultiplier tube X-ray framing camera based on pulse dilation technology

During the past decade, many diagnostic instruments have been developed that utilize electronic pulse dilation to achieve temporal resolution in the sub-10 ps range. The motivation behind these development efforts was the need for advanced diagnostics in high-density physics experiments around the w...

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Bibliographic Details
Published in:Journal of instrumentation 2024-07, Vol.19 (7), p.P07008
Main Authors: Fu, Wenyong, Hu, Chenman, Li, Ling, Zhou, Rongyan, Chen, Ping
Format: Article
Language:English
Subjects:
Acceleration
Camera tubes
Drift
Effectiveness
Electron clouds
Framing cameras
Free electrons
Microchannel plates
Microchannels
Microstrip transmission lines
Nuclear instruments and methods for hot plasma diagnostics
Photomultiplier tubes
Plasma diagnostics - charged-particle spectroscopy
Plasma diagnostics - high speed photography
Temporal resolution
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Summary:During the past decade, many diagnostic instruments have been developed that utilize electronic pulse dilation to achieve temporal resolution in the sub-10 ps range. The motivation behind these development efforts was the need for advanced diagnostics in high-density physics experiments around the world. This technology converts the signal of interest into a free electron cloud, which is accelerated into a vacuum drift space. The acceleration potential varies over time and causes axial velocity dispersion in the electron cloud. This velocity dispersion is converted into time separation after electrons pass through drift space. Then, traditional time resolved methods were used to detect free electrons, and the effective temporal resolution was magnified many times. A gated microchannel plate (MCP) X-ray framing camera based on pulse-dilation technology has been designed and manufactured in the paper. Here, we discuss design details and applications of these instruments. The temporal resolution measured without using broadening technology is approximately 78 ps. When the excitation pulse is applied to the PC, the pulse dilation technique is used to increase the measured temporal resolution to 9 ps. The propagation speed of gated pulses in MCP microstrip lines was measured using fiber bundle method, which is approximately 1.8 × 10 8 m/s.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/19/07/P07008