Development of a new radiation detector utilizing carbon nanotube as anode

A new gas-multiplication radiation detector utilizing carbon nanotube (CNT) as anode is proposed. With CNT anode, a very compact radiation counter with a good spatial resolution might be built.Two test chambers have been built and are being tested. Each detector body, a chamber with a volume of View the MathML source, is purged of air beforehand and then supplied with argon gas. At room temperature, the chamber works as a traditional proportional counter filled with argon gas. The chamber can be dipped in an open bath of liquid argon (LAr) and cooled to the vapor point of argon, 87 K. Within 1 h of deposition, the chamber will be filled with LAr. The background noise has been reduced to a level that the charge produced by 60 keV photons from 241Am is successfully detected, although a gas-multiplication around CNT is not yet confirmed.