Device for isolating vibrations
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Solution Overview
Problem
Existing ion trap systems face challenges in maintaining ultra-low temperatures required for quantum simulations and ion trap experiments, as they often rely on liquid helium or cycle refrigerators, which are inefficient in isolating vibrations and pose operational and safety hazards.
Innovation Solution
A device comprising a G-M cycle refrigerator, primary and secondary chambers, a vacuum ion pump, heat exchangers, and flexible connecting parts, including copper braids and bellows, to create a vibration-isolated environment for the ion trap, maintaining a 4 Kelvin temperature while minimizing the impact of refrigerator vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cycle refrigerator is used to maintain ultra-low temperature of the ion trap, then the temperature can be kept at 4 Kelvin, but the refrigerator's vibrations will interfere with the ion trap operation and reduce quantum bit coherence time
Solution Approach 1:
The system is divided into two separate chambers: a first chamber containing the ion trap and a second chamber containing the cycle refrigerator. This segmentation isolates the vibration source (refrigerator) from the sensitive component (ion trap), allowing temperature maintenance without direct vibration interference.
Solution Approach 2:
A flexible connecting part serves as an intermediary element between the first chamber and the second chamber. This flexible connector transmits necessary mechanical connections while isolating vibrations, acting as a mediator that allows functional connection without transmitting harmful vibrations.
2Temperature
If liquid helium is used to maintain ultra-low temperature, then the ion trap can operate at required temperatures, but it poses operational safety hazards and requires complex handling procedures
Solution Approach 1:
The patent replaces liquid helium with a cycle refrigerator system that uses more manageable cooling mechanisms. The cycle refrigerator provides continuous cooling without requiring hazardous liquid cryogens, eliminating safety hazards associated with liquid helium handling while maintaining the required ultra-low temperature.
3Use of energy by moving object
If the refrigerator is directly connected to the ion trap chamber, then cooling efficiency is maximized, but vibration isolation becomes difficult and quantum bit coherence time decreases
Solution Approach 1:
The cycle refrigerator is extracted from the ion trap chamber and placed in a separate second chamber. This extraction maintains cooling efficiency through the flexible connecting part while removing the vibration source from the ion trap environment, thereby preserving quantum bit coherence time.
Solution Approach 2:
A flexible connecting part is used to connect the first chamber (ion trap) and the second chamber (refrigerator). This flexible connector maintains thermal connection for efficient cooling while providing mechanical isolation to prevent vibration transmission, solving both cooling efficiency and vibration isolation requirements.
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 effectively isolates vibrations, reducing the impact of the refrigerator's vibrations on the ion trap, increasing the quantum bit coherence time and maintaining a stable low-temperature environment safely and efficiently, with reduced operational costs.
Implementation Method 1
The heat exchanger is connected to the sample chamber via the heat conduction part
Implementation Method 2
The cryocooler is a G-M cycle refrigerator comprising a primary cold head and a secondary cold head
Implementation Method 3
The flexible connecting part is disposed between the connector and the secondary chamber, and between the heat conduction part and the sample chamber
Implementation Method 4
The flexible connecting part between the heat conduction part and the sample chamber is a copper braid
Implementation Method 5
a vacuum ion pump, a heat exchanger
Implementation Method 6
The heat exchange medium between the secondary cold heat and the cold finger, and between the primary cold heat and the first heat shield, is liquid helium
Data Source
AI summary
A device for isolating vibrations includes an ion trap, a cryocooler, a primary chamber, a secondary chamber, a vacuum ion pump, a heat exchanger, a sample chamber, a support part, a connector, a heat conduction part, a first platform, a second platform, and a flexible connecting part. The primary chamber, the secondary chamber, and the vacuum ion pump are fixedly disposed on the first platform. The connector is a hollow structure disposed between the primary chamber and the secondary chamber. The primary chamber communicates with the secondary chamber via the hollow structure thereby forming an airtight chamber. The vacuum ion pump is connected to the primary chamber via a five-way flange. The support part is fixed on the second platform. The cryocooler is fixed on the support part. The cryocooler includes a cold head and a machine head. The cold head is suspended in the primary chamber.