Showing posts with label Cathy P. Foley. Show all posts
Showing posts with label Cathy P. Foley. Show all posts

Wednesday, January 24, 2018

Bradfield MP Paul Fletcher gets up close and personal with Lindfield’s CSIRO








https://www.dailytelegraph.com.au/newslocal/north-shore/bradfield-mp-paul-fletcher-gets-up-close-and-personal-with-lindfields-csiro/news-story/ef0c8a3411c4fc83ee5cbe8eb241f746

Doug Conway,
Bradfield MP Paul Fletcher gets shown an Exoflex prototype by Head of Fledge Innovation Gary Jones during a visit to CSIRO at Lindfield. Picture: Joel Carrett

SUPERMAN has been enlisted in the fight against terrorism, thanks to scientists beavering away in quiet, leafy Lindfield.
His powers of X-ray vision are being replicated at the CSIRO facility there in an ambitious project to detect, and ultimately disarm, bombs and other explosive devices.
The three-year, $3.6 million project is being partially funded by a $2.5 million federal grant to CSIRO, working in partnership with UTS and the University of Wollongong.
It aims to produce a light, portable device weighing five to 10 kilos which will allow soldiers to “see” weapons through clothing and to detect explosives in non-metal containers at a safe distance of 30m.

                Bradfield MP Paul Fletcher chats with worker Kurnal Radhanpura. Picture: Joel Carrett

“Wouldn’t it be great to be able to give defence personnel Superman’s vision to detect improvised explosive devises in places like Afghanistan? That’s what we are aiming for,” deputy director and science director at CSIRO Manufacturing Dr Cathy Foley said.
The device could also be used in civilian installations such as airports and during emergencies such as when suspect packages are left in trains or other public places.
Dr Foley said such a device “absolutely” could have been used to save countless lives, not only on the battlefield but in terrorist attacks such as the bombing at an Ariana Grande concert in Manchester last year.
“It would have allowed security personnel to pick up explosive material in that backpack,” she said.

Bradfield MP Paul Fletcher joined by Head of Fledge Innovation Gary Jones during a visit to CSIRO Lindfield. Picture: Joel Carrett

Sports stadiums could have such safeguards routinely built into them in future.
“That’s the dream and the vision. It will get there, no doubt,” she said.
The science behind the project involves using the Terahertz spectrum, which provides an imaging “sweet spot” in between higher frequency gamma rays, X-rays and infra-red rays, and lower frequency radio waves and microwaves.
The Terahertz spectrum provides sufficient penetration without being harmful to humans by breaking down cells.
It allows scientists to detect different substances, which all have a different chemical “fingerprint”. The sensor system can see through fabrics, plastics, wood and other non-metals, and could be used in conjunction with existing metal detectors.
“Very few people would realise that we have such a world-class research institution right here in Lindfield,” Bradfield federal Liberal MP Paul Fletcher said.

Saturday, July 15, 2017

Abstract-Experimental Investigation of a Broadband High-Temperature Superconducting Terahertz Mixer Operating at Temperatures Between 40 and 77 K



  • Xiang Gao, Jia
  •  Du, 
  • Ting Zhang, 
  • Y. Jay Guo, 
  • Cathy P. Foley
https://link.springer.com/article/10.1007%2Fs10762-017-0422-x

This paper presents a systematic investigation of a broadband thin-film antenna-coupled high-temperature superconducting (HTS) terahertz (THz) harmonic mixer at relatively high operating temperature from 40 to 77 K. The mixer device chip was fabricated using the CSIRO established step-edge YBa2Cu3O7-x (YBCO) Josephson junction technology, packaged in a well-designed module and cooled in a temperature adjustable cryocooler. Detailed experimental characterizations were carried out for the broadband HTS mixer at both the 200 and 600 GHz bands in harmonic mixing mode. The DC current-voltage characteristics (IVCs), bias current condition, local oscillator (LO) power requirement, frequency response, as well as conversion efficiency under different bath temperatures were thoroughly investigated for demonstrating the frequency down-conversion performance.