Development of a 0.5 Tesla AF Demagnetizer

0.5特斯拉AF消磁机的开发

• 批准号: 1053399
• 负责人: Robert Coe
• 金额: $ 7.95万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-15 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1053399&HistoricalAwards=false
• 关键词: Development; 0.5; Tesla; AF; Demagnetizer

1053399CoeThis grant support the development of a new high magnetic field capable (0.5-1.0 Tesla) single axis Alternating Field (AF) Demagnetizer to support research in rock and paleomagnetism. The design would incorporate a magnetic core, built from high magnetic permeability material, in an air-cooled coil producing a uniform field oriented transverse to the sample bore. The PIs will first build a 0.5 T AF demag system and then will attempt the more challenging 1.0 T design. A successful device will yield a much higher peak alternating field than available on existing commercial devices (a factor of 5-6 higher field) and enable demagnetization of many samples that currently cannot be demagnetized via alternative methods without generating spurious primary remanent magnetizations, particularly rocks that contain magnetic minerals that are chemically altered using thermal demagnetization techniques. It will also offer the ability to characterize the magnetic mineralogy of sedimentary rocks through examination of coercivity distributions derived from AF demagnetization of magnetic remanence. The developed instrument will support collaborative research in rock and paleomagnetism. The PIs will engage undergraduates in some aspects of the development effort.***

1053399 CoeThis grant supports the development of a new high magnetic field capable（0.5-1.0 Tesla）single axis Alternating Field（AF）Demagnetizer to support research in rock and paleomagnetism.该拨款支持开发一种新的高磁场能力（0.5-1.0特斯拉）单轴交变场（AF）退磁器，以支持岩石和古地磁学的研究。 该设计将在空气冷却线圈中包含由高导磁率材料制成的磁芯，从而产生横向于样品孔的均匀磁场。 PI将首先构建0.5 T AF demag系统，然后尝试更具挑战性的1.0 T设计。 成功的装置将产生比现有商业装置上可用的高得多的峰值交变场（高出5-6倍的场），并且能够使目前不能通过替代方法退磁而不产生伪初级剩磁磁化的许多样品退磁，特别是含有使用热退磁技术化学改变的磁性矿物的岩石。 它还将提供通过检查来自AF退磁的剩磁的磁化率分布来表征沉积岩的磁性矿物学的能力。开发的仪器将支持岩石和古地磁学的合作研究。 PI将使本科生参与开发工作的某些方面。