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1. (WO2017034158) ALPHA PARTICLE DETECTION APPARATUS USING DUAL PROBE STRUCTURED IONIZATION CHAMBER AND DIFFERENTIAL AMPLIFIER

Pub. No.:    WO/2017/034158    International Application No.:    PCT/KR2016/007941
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Fri Jul 22 01:59:59 CEST 2016
IPC: G01T 1/185
G01T 1/178
G01T 7/00
Applicants: FTLAB CO., LTD.
주식회사 에프티랩
Inventors: KO, Jae Jun
고재준
KIM, Young Gweon
김영권
Title: ALPHA PARTICLE DETECTION APPARATUS USING DUAL PROBE STRUCTURED IONIZATION CHAMBER AND DIFFERENTIAL AMPLIFIER
Abstract:
The present invention relates to an alpha particle detection apparatus, comprising: an ionization chamber which has one side opened or covered with a wire mesh, has a plurality of holes formed on the outer circumferential surface thereof to smoothly circulate air, and applies bias power to the surface thereof to form an electric field thereinside; a main probe unit which has one end disposed within the ionization chamber and absorbs an ionic charge generated in the occurrence of alpha (α) decay in the ionization chamber; a guard ring unit which is coupled to the other side of the ionization chamber so that the main probe unit penetrates into the inside of the ionization chamber, and absorbs leakage current generated between the ionization chamber and the main probe part to flow to a ground side; an auxiliary probe unit which has one end passing through the inside of the guard ring unit and disposed within the ionization chamber to be spaced apart from the main probe unit by a predetermined distance, and allows surrounding noise to be introduced therein; first and second preamplifiers which are respectively connected to the other end of the main probe unit and the auxiliary probe unit, and amplify electrical fine signals inputted from the main probe unit and the auxiliary probe unit to a predetermined magnitude; and a differential amplifier which has a non-inverting terminal (+) and an inverting terminal (-) which are respectively connected to the output terminals of the first and second preamplifiers, and amplifies a voltage difference between the preamplified electrical signals from the first and second preamplifiers to cancel a noise signal and output an alpha particle detection signal. As such, it is possible to effectively detect alpha (α) particles which is a type of radiation.