RF Photon Timer With Circular Scan for Picosecond Recording
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Solution Overview
Problem
Current detectors for recording photons and electrons, such as vacuum photomultipliers and streak cameras, face limitations in achieving high precision and continuous data recording due to temperature requirements and limited data record lengths, respectively, which hinders their application in fields like nuclear medicine and high-energy physics.
Innovation Solution
A Radio Frequency (RF) Timer system that uses a vacuum container with a photocathode, accelerating electrode, electrostatic lens, and RF deflector to convert photons or electrons into nanosecond electronic signals, enabling picosecond time resolution and continuous data recording with high stability and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If superconducting nanowire detectors are used to achieve 15 ps or better time resolution, then measurement precision is improved, but device complexity increases due to liquid helium temperature requirements
Solution Approach 1:
The patent replaces the mechanical cooling system (liquid helium temperature control) with an electromagnetic field-based timing system using radio frequency fields and streak cameras, achieving picosecond resolution without cryogenic requirements
Solution Approach 2:
The patent introduces radio frequency fields as an intermediary between the photon detection and time measurement processes, using RF-modulated light sources and streak cameras to achieve precise timing without direct thermal contact or cooling systems
2Measurement precision
If circular scan streak tubes with single-scan readout are used, then measurement precision is improved, but productivity decreases due to limited data record length
Solution Approach 1:
The patent implements continuous scanning of the electron beam in a circular or spiral pattern, allowing uninterrupted data acquisition over extended periods without requiring blanking or deflection of the beam, thereby extending the effective data record length while maintaining picosecond resolution
Solution Approach 2:
The patent transitions from linear scan patterns to circular or spiral scan patterns, adding a temporal dimension to the data acquisition process and enabling continuous recording over multiple cycles without overwriting previous data
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The RF Timer achieves unprecedented precision in photon timing with 10 picosecond resolution and 0.2 ps/h stability, facilitating advanced data acquisition and processing for diverse scientific and technological applications, including quantum technologies and medical imaging.
Implementation Method 1
A circular-scan RF Timer has been proposed for detecting, recording, and temporally resolving optical events on the order of picoseconds
Implementation Method 2
timing systems based on radio frequency (RF) fields can provide precision of the order of 1 ps or better
Data Source
AI summary
The invention relates to a class of RF Timer based electron and photon vacuum recorders, particularly to single electron and photon sensitive recorders with picosecond time resolution. The RF Timer features a vacuum container housing an electron gun with a photocathode, an electron-transparent accelerating electrode, and an electrostatic lens for electron focusing. A deflecting electrode guides photoelectrons in a circular and spiral path, and a position-sensitive detector system records their positions with nanosecond electronic signals processed in real-time. The objective is to achieve single electron and photon recording with a time resolution of 10 picoseconds or better at speeds reaching several MHz and stability better than 0.2 picoseconds/h.