Serial Multi-FEL Oscillator Layout for Electron Beam Reuse
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Solution Overview
Problem
Current free electron laser (FEL) facilities face limitations in maintaining high average electron beam current and power due to the sharing of a driving electron beam among multiple FEL beamlines, resulting in lower laser intensity and pulse repetition rate.
Innovation Solution
The solution involves arranging multiple FEL oscillators in a serial configuration along a line or closed ring and reusing a single electron beam multiple times to drive all FEL oscillators, thereby boosting the electron beam current and power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single electron beam is shared among multiple FEL beamlines in parallel configuration, then the number of FEL beamlines can be increased, but the average electron beam current and power to individual undulators are substantially reduced
Solution Approach 1:
The system segments the electron beam into multiple separate beams using a beam spreader, allowing each segmented beam to independently drive an FEL oscillator. This enables multiple FEL beamlines to operate simultaneously without sharing the same electron beam, thereby maintaining high power levels at each undulator while supporting multiple beamlines.
Solution Approach 2:
The invention transitions from a single-dimension shared beam approach to a multi-dimension parallel beam architecture. By spatially separating the electron beams in different dimensions and directing them to separate FEL oscillators, the system achieves both multiple beamlines and high individual beam power simultaneously.
2Ease of manufacture
If a single electron beam is shared among multiple FEL beamlines, then facility construction costs can be reduced, but the pulse repetition rate and laser intensity are substantially lowered
Solution Approach 1:
The electron beam is segmented into multiple independent beams that can be independently controlled and timed. This segmentation allows each FEL oscillator to operate at optimal pulse repetition rates without being constrained by shared beam limitations, thereby maintaining high productivity while using a single accelerator facility.
Solution Approach 2:
A single electron accelerator facility is designed to serve multiple FEL oscillators simultaneously through the beam spreader system. This multi-functional configuration allows one accelerator to support multiple beamlines with high pulse repetition rates, achieving both cost-effectiveness and high productivity.
3Illumination intensity
If multiple FEL oscillators are arranged in serial configuration with electron beam recirculation, then peak and average brightness can be substantially increased, but the device complexity increases
Solution Approach 1:
Multiple FEL oscillators are arranged in a serial configuration where electron beams are combined and recirculated through the same undulator system. This merging of beam paths allows the same electron beam to drive multiple FEL oscillators sequentially, increasing peak and average brightness while utilizing shared infrastructure to manage complexity.
Solution Approach 2:
The electron beam is recirculated continuously through the FEL oscillators multiple times, allowing the same beam to generate coherent radiation in each pass. This continuous reuse of the electron beam maximizes the utilization of beam energy and increases both peak and average brightness without requiring proportionally higher beam currents.
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
This approach enhances the performance of individual FELs by increasing peak and average brightness and pulse repetition rate, while also reducing construction and operating costs for FEL-based photon sources.
Implementation Method 1
A free electron laser (FEL) utilizes a high brightness electron beam passing through a magnetic undulator to generate high brightness coherent radiations
Implementation Method 2
An electron beam from an accelerator is accelerated to high energy for production of soft to hard X-ray FELs
Data Source
AI summary
An apparatus and method for efficient and economic production of multiple free electron lasers includes a serial arrangement of multiple FEL oscillators along a line or a closed ring and reuse of a single electron beam multiple times to drive all FEL oscillators. In a ring configuration, electron bunch recirculation in the ring could also be combined with reuse of the electron beam for FEL production. This would lead to performance enhancement as current of the electron beam would be boosted by a factor of the number of FEL oscillators thereby multiplying the amount of bunch recirculation in the ring and leading to multiple times higher photon flux/average brightness. The invention can also be applied for hybrid photon sources of both FEL and incoherent synchrotron radiation, driven by one electron beam.