A program has been developed and initiated at the Indira Gandhi Centre for Atomic Research (IGCAR) for the utilization of SQUID sensors in various application areas. DC SQUID sensors based on Nba€“AlOe?‘￥a€“Nb Josephson junctions have been designed and developed inhouse along with associated ???ux-locked loop (FLL) electronics. A compact low ???eld SQUID magnetometer insertible in a liquid helium storage dewar has also been developed inhouse and is in use. Efforts to build a high ???eld SQUID magnetometer, SQUID-DAC system, are in progress. A planar gradiometric DC SQUID sensor for non-destructive evaluation (NDE) application to be used in relatively unshielded environment has been designed and developed. An easily portable NDE cryostat with a small lift-off distance, to be used in external locations has been designed and tested. The magnetic ???eld produced by a given two-dimensional current density distribution is inverted using the Fourier transform technique.
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机译：英迪拉·甘地原子研究中心（IGCAR）已开发并启动了一个程序，用于在各种应用领域中使用SQUID传感器。在内部设计并开发了基于Nba“ AlOe？￥ a” Nb Josephson结的DC SQUID传感器以及相关的ux-locked loop（FLL）电子设备。一种可插入液氦存储杜瓦瓶中的紧凑型低磁场SQUID磁力计也已在内部开发并投入使用。正在努力建立高磁场的SQUID磁力计SQUID-DAC系统。已经设计和开发了用于相对无屏蔽环境的用于无损评估（NDE）应用的平面梯度DC SQUID传感器。已经设计并测试了一种易于携带的，具有较小提起距离的NDE低温恒温器，该恒温器将用于外部场所。使用傅立叶变换技术将由给定的二维电流密度分布产生的磁场反转。
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