Two-Period Undulator Layout for Broad Spectral Range in Tight Space
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Solution Overview
Problem
Existing undulators require high-capacity lifting equipment, extensive lateral space, and complex motor control systems, making them unsuitable for compact installations and inefficient in utilizing the full length of the straight section, while also generating excessive power that causes overheating and deformation issues.
Innovation Solution
A two-period undulator design featuring four series of permanent magnets with distinct periodicities and magnetization directions, allowing for mechanical displacement to alter the magnetic field periodicity without the need for extensive equipment or complex motor control, enabling compact operation and moderate power generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual undulators with different periods are used to provide complementary spectral ranges, then spectral range coverage is improved, but high-capacity lifting equipment and extensive lateral space are required
Solution Approach 1:
The patent combines two undulators with different magnetic periods into a single integrated device. The undulator features a magnetic system with two distinct periodicities (λ1 and λ2) arranged in alternating segments along the beam path, allowing both spectral ranges to be covered by one compact device rather than requiring separate dual undulators with extensive lateral displacement mechanisms
Solution Approach 2:
The undulator employs movable magnetic elements that can be displaced along the beam axis to dynamically switch between the two magnetic periods. This dynamic adjustment capability allows the device to provide complementary spectral ranges while maintaining a compact fixed footprint, eliminating the need for large lateral displacement mechanisms
2Adaptability or versatility
If undulators with continuously variable periods are used to generate moderate magnetic field levels, then spectral range flexibility is improved, but the full length of the straight section cannot be utilized when magnetic period is at minimum
Solution Approach 1:
The undulator magnetic system is segmented into distinct periodicity zones (λ1 and λ2) arranged in alternating segments. This segmentation allows the device to provide continuously variable effective period by adjusting the relative positioning of segments, while ensuring that the full straight section length is always utilized regardless of the selected magnetic period configuration
Solution Approach 2:
The undulator employs movable magnetic elements that can be dynamically repositioned to optimize the utilization of the straight section length. When the magnetic period is set to its minimum value, the dynamic adjustment mechanism ensures that the entire straight section is still fully utilized, maintaining optimal photon stream emission efficiency
3Adaptability or versatility
If cylindrical permanent magnets with variable period are used to provide flexibility, then spectral range access is improved, but management and control of large number of motors becomes complex and costly
Solution Approach 1:
The patent merges the functions of multiple independently controlled cylindrical magnet systems into a unified magnetic structure with two fixed periodicities. Instead of requiring individual motor control for each magnet element, the design uses a coordinated system with fewer actuators that control the relative positioning of magnetic segments, dramatically reducing system complexity while maintaining spectral range flexibility
Solution Approach 2:
The undulator design creates a universal magnetic system where a single coordinated control mechanism manages both periodicity configurations (λ1 and λ2). The magnetic elements are designed to function in multiple configurations through a unified control architecture, eliminating the need for separate motor control systems for each magnet and reducing overall device complexity
4Adaptability or versatility
If strong magnetic field undulators are used to broaden spectral range, then spectral coverage is improved, but power produced increases causing heating and deformation
Solution Approach 1:
The undulator employs parameter changes by switching between two magnetic period configurations (λ1 and λ2) rather than continuously increasing magnetic field strength. This allows the device to broaden spectral range coverage through geometric parameter adjustment (period length) while maintaining moderate magnetic field levels, thereby avoiding the excessive power generation and associated heating problems
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 two-period undulator achieves a broad spectral range with reduced power and magnetic forces, eliminating the need for heavy equipment and complex control systems, while allowing for efficient use of space and minimizing overheating and deformation issues.
Implementation Method 1
An undulator is a device that generates a spatially periodic magnetic field
Implementation Method 2
four series of permanent magnets installed at regular intervals along the axis Y
Implementation Method 3
When charged particles (generally electrons) pass through this device, they are subjected to a force that imparts an oscillation motion thereto and they generate an electromagnetic wave
Implementation Method 4
the emitted radiation, called synchrotron radiation
Data Source
AI summary
A two-period inverter, including a series of permanent magnets with a spatial periodicity of λ0 or (2n+1)λ0 or 2nλ0 along a longitudinal axis Y and first moving apparatus arranged to modify along the axis Y, with respect to a reference position along the axis Y, the relative position of the first and second series, which move as one, with respect to the position of the third and fourth series, which move as one, by a distance (2n+1)λ0/2 or (2n−1)λ0/2, so that the inverter is placed in an offset position along the axis Y is discussed.