NOVEL, FAST, RELIABLE&INEXPENSIVE RADIATION DOSIMETER

新颖、快速、可靠

• 批准号: 6310476
• 负责人: Gavin James Braithwaite
• 金额: $ 9.86万
• 依托单位: CAMBRIDGE POLYMER GROUP, INC.
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2002-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6310476
• 关键词: biomedical equipment development; infrared radiation; ionizing radiation; polyethylenes; polymers; radiation detector; radiation dosage

DESCRIPTION (Applicant's abstract verbatim): In this SBIR phase I proposal, we will develop a new radiation dosimetry technique for use in the ionizing radiation industry. Radiation is frequently used to sterilize biomedical polymers, and improve through crosslinking, the properties of these implants. Polymer irradiation often requires dose levels beyond 200 kGray. Electron beam operators thus need dosimeters with this range and fast response times for on-the-fly dose rate adjustment. Photochromic dyes, the most commonly used dosimetry system, saturate at 50 kGray, often take 5-6 hours to stabilize, and show aging. By making use of the radiolytic reactions in poly(ethylene) undergoing ionizing radiation, a reliable marker for radiation dose can be obtained. Our approach focuses on a specific radiolytic reaction that scales with radiation dose, and is easily measured with infrared absorption. This proposal will involve the design and fabrication of a prototype small enough, and simple enough, to use at a radiation facility with no special training. The thin dosimetry targets will be flexible (and therefore conformable), resilient, tolerant of contamination and damage (therefore ideal for industrial applications in laboratories or on production floors) and will have a response time on the order of minutes. They will also be immune to aging and have considerably higher dosage ranges than other current dosimetry techniques. PROPOSED COMMERCIAL APPLICATION: The proposed dosimeter design will provide a simple, low cost, technique capable of replacing, and improving on, current state-of-the-art radiation dosimetry approaches. The reader will be useable with little or no training. It will therefore be invaluable in any radiation facility that must have fast response dosimeters (such as beam-lines requiring variable doses), in high dose applications (such as orthopaedic implant fabrication), in applications requiring directional irradiation (such as the wire coating industry) and in environments where surface contamination may be an issue.

描述（申请人的摘要逐字病）：在此SBIR第一阶段提案中，我们 将开发一种新的辐射剂量测定技术，用于电离 辐射行业。辐射经常用于消毒生物医学 聚合物，并通过交联改善这些植入物的特性。 聚合物辐照通常需要超过200 kgray的剂量水平。电子束 因此，操作员需要此范围和快速响应时间的剂量计 在线剂量率调整。光色素染料，最常用的染料 剂量测定系统，在50 kgray处饱和，通常需要5-6个小时才能稳定，并且 显示老化。通过利用聚（乙烯）中的放射性反应 经过电离辐射，可靠的辐射剂量标记可以是 获得。我们的方法着重于缩放的特定放射性反应 辐射剂量，并通过红外吸收很容易测量。这 提案将涉及足够小的原型的设计和制造， 很简单，可以在没有特殊培训的情况下在辐射设施中使用。这 薄剂量测定目标将是柔性的（并且因此均匀），弹性， 容忍污染和损害（因此非常适合工业 在实验室或生产地板上的申请），并将有回应 几分钟的时间。他们也将不受衰老的影响 剂量范围比其他当前剂量测定技术高得多。 拟议的商业应用： 拟议的剂量计设计将提供一种简单，低成本的技术 替换并改善当前最新辐射剂量测定方法。 读者将在很少或没有培训的情况下使用。 因此，这将是无价的 辐射设施必须具有快速响应的剂量计（例如梁线需要 可变剂量），在高剂量应用（例如骨科植入物制造）中， 需要定向辐照的应用（例如电线涂料行业）和 表面污染可能是一个问题的环境。