Coherent-Light Particle Beam Velocity Shaper for Reduced Length
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Solution Overview
Problem
Existing Zeeman slowers suffer from low efficiency, long device length, and increased internal beam losses, making them difficult to align and handle in system setups.
Innovation Solution
A particle beam velocity shaper using multiple beams of coherent light with varying wavelengths and a spatially varying magnetic field to induce transitions, reducing the need for spin-flip magnetic fields and minimizing internal losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a Zeeman slower with a coil creating a magnetic field in the longitudinal direction is used, then the atomic beam velocity can be controlled, but the device length increases and internal beam losses increase
Solution Approach 1:
The magnetic field generation is segmented into multiple independent coils (first coil, second coil, third coil) positioned at different locations along the beam path. Each coil contributes to the overall magnetic field profile, allowing velocity control to be distributed across multiple zones rather than requiring a single long coil, thus reducing the overall device length while maintaining velocity control capability.
Solution Approach 2:
Different coils are configured to provide different magnetic field characteristics at different locations. The first coil creates a magnetic field with a first profile, the second coil creates a magnetic field with a second profile, and the third coil creates a magnetic field with a third profile. This local optimization of magnetic field properties allows efficient velocity control in each zone, reducing the total length required compared to a uniform field approach.
2Speed
If a Zeeman slower with spin-flip magnetic arrangement is used, then velocity manipulation is achieved, but the complexity of the magnetic field generator increases
Solution Approach 1:
The velocity manipulation function is divided into multiple stages, with each coil responsible for a specific portion of the velocity range. The first coil handles initial velocity reduction, the second coil continues the deceleration, and the third coil completes the velocity shaping. This segmentation eliminates the need for complex spin-flip arrangements while achieving the same velocity manipulation objective through simpler, distributed magnetic field generation.
3Speed
If a prior art Zeeman slower is used, then atomic velocities can be slowed, but the efficiency is low and the intensity of the output beam is low
Solution Approach 1:
Each coil is optimized to provide the specific magnetic field profile needed for its location in the beam path. The first coil provides a profile optimized for initial deceleration, the second coil provides a profile for intermediate velocity ranges, and the third coil provides a profile for final velocity shaping. This local optimization ensures maximum interaction efficiency at each stage, increasing the overall beam intensity by minimizing losses that would occur in a non-optimized single-stage system.
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 device achieves a higher capture rate with a reduced length, resulting in a more intense output particle beam with well-defined velocities and distinct wavelengths, benefiting applications like particle diffraction.
Implementation Method 1
A particle beam velocity shaper using multiple beams of coherent light with varying wavelengths and a spatially varying magnetic field to induce transitions
Implementation Method 2
Atomic beam velocities can be manipulated by lasers via momentum transfer from the laser photons to the individual atoms in the beam. This type of laser manipulation is termed Doppler cooling when used to slow and cool the atoms
Implementation Method 3
This phenomena is characterized by the dissipative force or radiation pressure force
Data Source
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Figure 3b~4
Figure 5~6
AI summary
1. A particle beam velocity shaper (1) and a method for shaping the velocity of an incoming particle beam (b) with a beam direction (z), wherein particle beam velocity shaper (1)comprises; - a magnetic field generator (30) arranged to provide a magnetic field (B) in the beam direction (z), - one or more electromagnetic radiation sources (20a, 20b,...) configured to generate two or more beams of coherent light (21a, 21b,... ), wherein the beams of coherent light (21a, 21b,...) coincide at least partly with the particle beam (b).