Ion source negative hydrogen ion beam leading-out experiment table for neutron tube
An ion source and ion beam technology, applied in the direction of DC voltage accelerator, can solve the problems of large sputtering damage and low beam utilization rate, and achieve the effect of shortening the development cycle and saving development funds
Inactive Publication Date: 2015-02-11
NORTHEAST NORMAL UNIVERSITY
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Problems solved by technology
The neutron tube with this structure has low utilization rate of the extracted beam, secondary electrons will be generated on the target, field emission points of electrons are easily formed on the surface of the Faraday cylinder, and the sputtering damage of the target is large.
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[0017] The penning neutron tube ion source negative hydrogen ion beam extraction test bench of the present invention is composed of the negative hydrogen ion beam extraction part of the Penning ion source, a vacuum system and an environment part. Adopting a cylindrical axisymmetric structure, it puts the ion source, accelerating electrode, collecting electrode, deflection magnet, air pressure adjustment system, etc. in the glass bell jar to form a compact and easy-to-use ion source beam extraction experimental device. Its structure and position relationship are as attached figure 1 And attached figure 2 shown.
[0018] Penning ion source negative hydrogen ion beam extraction part: as attached figure 1 , clean all parts and install them from bottom to top. First put the counter cathode 3 into the copper head 13, then put the ion source magnetic steel 1 into the copper head 13, draw the cathode 2 and the ion source cover 5 and weld them together, and place them on the copper...
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The invention belongs to an experiment facility for a neutron tube and particularly relates to an ion source negative hydrogen ion beam leading-out experiment table for the neutron tube, which is a key experiment facility for researching and designing the neutron tube with the long service life and high stability. A glass bell jar with a high-voltage electrode serves as experimental space. Hydrogen is fed into a micro-adjustable valve, and the vacuum degree can be adjusted so that the working air pressure inside the neutron tube is simulated. The generation of D and T negative ions in a penning ion source on the experimental table mainly depends on a dissociation adsorption manner, negative molecular ions and negative triatomic ions do not exist, and all leading-out beams are monatomic negative ions. The leading-out beams of the ion source in the neutron tube are closely related to multiple factors. Through the experiment table, the parameters of an ion source system can be very conveniently adjusted so that the influences of the parameters on the leading-out beams are researched, and good beam quality is achieved on an accelerating electrode. In addition, the experiment table can be used for making simulation experiment of the neutron tube and checking and correcting the design of the neutron tube and is capable of greatly shortening the development cycle and saving development capital.
Description
technical field [0001] The invention belongs to experimental equipment for neutron tubes, in particular to an experimental platform for extracting negative hydrogen ion beams from a Penning (PIG) neutron tube ion source. Background technique [0002] The neutron tube and the neutron generator with it as the core is a highly experimental science and technology, which has important applications in many fields. The neutron tube seals the ion source, accelerating focusing electrode, target and air pressure regulation system in an insulating vacuum envelope, forming a small accelerator. The ion source in the neutron tube is one of the core components that determine the output, life and stability of the neutron tube. Penning ion source (referred to as PIG ion source) is widely used in small accelerators such as neutron tubes due to its simple structure, stable operation, long life, simple power supply system, and ability to work under low pressure. [0003] With the continuous...
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IPC IPC(8): H05H3/06
Inventor 乔双
Owner NORTHEAST NORMAL UNIVERSITY