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Target design for high-power laser accelerated ions

A laser and positive ion technology, applied in the direction of ion beam tubes, ion sources/guns, parts of particle separator tubes, etc.

Inactive Publication Date: 2008-02-27
FOX CHASE CANCER CENTER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the influence of the properties of the clusters on the accelerating electric field and the maximum proton energy of the laser interacting with the bilayer target is not fully understood

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  • Target design for high-power laser accelerated ions
  • Target design for high-power laser accelerated ions
  • Target design for high-power laser accelerated ions

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Embodiment Construction

[0026] The invention can be understood more readily by reference to the following detailed description when taken in conjunction with the accompanying drawings and examples, which form a part of this disclosure. It is to be understood that the invention is not to be limited to the particular apparatus, methods, conditions or parameters described or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only, and is not intended to imply required limitations of the present invention. Also, as used in the specification, including the appended claims, the singular forms "a" and "the" include a plurality and references to specific numerical values ​​include at least the specific value unless the context clearly dictates otherwise. When expressing a range of values, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximat...

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Abstract

Methods for designing a laser-accelerated ion beam are disclosed. The methods include modeling a system including a heavy ion layer, an electric field, and high energy light positive ions having a maximum light positive ion energy, correlating physical parameters of the heavy ion layer, the electric field, and the maximum light positive ion energy using the model, and varying the parameters of the heavy ion layer to optimize the energy distribution of the high energy light positive ions. One method includes analyzing the acceleration of light positive ions, for example protons, through interaction of a high-power laser pulse with a double-layer target using two-dimensional particle-in-cell (PIC) simulations and a one-dimensional analytical model. The maximum energy acquired by the accelerated light positive ions, e.g., protons, in this model depends on the physical characteristics of the heavy-ion layer-the electron-ion mass ratio and effective charge state of the ions. The hydrodynamic equations for both electron and heavy ion species solved and the test-particle approximation for the protons is applied. It was found that the heavy ion motion modifies the longitudinal electric field distribution, thus changing the acceleration conditions for the light positive ions.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 60 / 638,821, filed December 22, 2004, which is hereby incorporated by reference in its entirety. statement of government support [0003] This work was supported in part by the Department of Health and Human Services, National Institutes of Health under contract number CA78331. Accordingly, the government may have rights in these inventions. technical field [0004] The field of the invention relates to laser acceleration of light positive ions, such as protons, resulting from the interaction of ultra-high intensity laser pulses with a target material. The field of the invention also relates to targets and their design for interaction with ultra-high intensity laser pulses to generate high energy light positive ions. Background technique [0005] The interaction of ultra-high-intensity laser pulses and plasmas has been studied due to its pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/16H01L21/26
CPCY02E30/16H01J27/24G21B1/19H01L21/268Y02E30/10
Inventor 尤金·S·弗卡尔拉沃·维尔特切夫马长明
Owner FOX CHASE CANCER CENTER