Solid Target System for Radionuclide Preparation with Laser Radar Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current solid target systems for radionuclide preparation are limited by low efficiency, small target component size, lack of cooling, and manual replacement, which restricts the diversity and yield of medical radionuclides produced.
Innovation Solution
A solid target system incorporating a cassette with a cooling sub-system, ejection sub-system, laser radar positioning sub-system, and control cabinet, enabling automatic target component replacement and real-time positioning for accurate ejection, and using circulating cooling water to withstand higher beam intensities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the solid target component is placed inside the accelerator, then the target system can be compact, but the limited internal space greatly limits the size of the target component itself
Solution Approach 1:
The system divides the target component into a target plate and a target holder, allowing the target plate to be optimized for bombardment while the holder provides structural support and cooling channels. This segmentation enables the target system to exceed the accelerator's internal volume constraints while maintaining effective target size.
Solution Approach 2:
The target holder extends in the longitudinal direction beyond the accelerator's internal space, utilizing the space dimension along the particle beam path. This allows the target component's overall length to exceed the accelerator's internal diameter constraint, effectively increasing target volume without violating spatial limitations.
2Power
If no cooling device is placed inside the accelerator to cool the target component, then the accelerator remains simple, but the beam intensity that the target component can withstand is limited, thereby limiting the yield
Solution Approach 1:
The cooling water circulating through channels in the target holder acts as an intermediary heat transfer medium. It absorbs heat from the target plate during bombardment and transports it outside the accelerator to a cooling reservoir, enabling high beam intensity without direct cooling devices inside the accelerator.
Solution Approach 2:
The system uses a hydraulic cooling system with circulating water flowing through channels in the target holder. This hydraulic approach provides efficient heat removal, allowing the target to withstand high beam intensities that would otherwise cause overheating and damage.
3Productivity
If manual replacement of target components is used, then the system remains simple, but automatic replacement is not realized, resulting in low production efficiency
Solution Approach 1:
The target holder is designed to be movable along the longitudinal direction, enabling automatic replacement of the target plate. The holder can be positioned to bring a fresh target plate into the bombardment position while removing the spent one, automating the replacement process without requiring complex robotic systems.
Solution Approach 2:
Multiple target plates are pre-loaded onto the target holder in sequence. Before bombardment begins, the holder is prepared with multiple target plates already in position, allowing continuous operation by simply advancing the holder to the next target plate when one is depleted, thereby achieving automatic replacement functionality.
4Adaptability or versatility
If liquid target systems are used, then a few types of nuclides can be prepared, but the system fails to meet the current clinical demand for diversified nuclides
Solution Approach 1:
The solid target system with interchangeable target plates provides universal applicability for preparing multiple types of radionuclides. Different target materials (e.g., enriched oxygen-18 water, enriched nickel-64, enriched zinc-68) can be loaded onto the same target holder and processed through the same accelerator system, enabling diverse nuclide production while maintaining high yields through optimized solid target bombardment geometry.
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 system enhances radionuclide preparation efficiency, increases the variety of nuclides that can be produced, and improves recovery accuracy, allowing for higher nuclide yield and safer operation in complex environments.
Implementation Method 1
the cooling sub-system is configured to cool down the solid target component with a cooling water; and the cooling water is configured to flow from the water supply end of the cooling sub-system to the solid target component to cool the solid target component
Implementation Method 2
a laser radar positioning sub-system; the laser radar positioning sub-system is configured to transmit position information of the ejection sub-system to the control cabinet in real time
Implementation Method 3
an accelerator is employed to accelerate charged particles to bombard the target plate to trigger nuclear reactions on the target surface
Implementation Method 4
accelerate charged particles to bombard the target plate to trigger nuclear reactions on the target surface, so as to produce the radionuclides
Data Source
AI summary
A solid target system for the radionuclide preparation, including a cassette, an ejection sub-system, a laser radar positioning sub-system, a cooling sub-system and a control cabinet. The cassette includes a solid target component for the nuclide preparation and a shielding box. The ejection sub-system is configured to eject the cassette to a recovery hole after the nuclide preparation is completed. The laser radar positioning sub-system is arranged above the ejection sub-system, and is electrically connected to the control cabinet. Both sides of the cassette are each provided with the cooling sub-system for cooling down the solid target component. The control cabinet is electrically connected to a direct-current servo motor for controlling an operating state thereof.