Physical Parameter’s Perspective to Achieve the Optimum Geiger Muller Detector’s Performance in the Nuclear Counting System

Kartini, Eka Ratna (2005) Physical Parameter’s Perspective to Achieve the Optimum Geiger Muller Detector’s Performance in the Nuclear Counting System. S1 thesis, uny.

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Abstract

This study aims at determining how effective are the influences of detector sizes, types of gas field, and the changes of operation temperature on detector characteristics of Geiger Muller viewed from threshold voltage, plateau, slope, and the resolving time. The determination of detector characteristics was obtained from the detector enumeration with diameter variation, types of gas field, and temperature operation changes on Cs-137 radiation. Data obtained from detector characteristics’ determination were the data count. Geiger Muller detector manufacturing process was started from the preparation of materials, the cathode tube and tube cap manufacture, installation of the detector and anode cap, vacuum tubes, gas fill, detector characteristic test, and data acquisition. The detector was made of stainless steel, the anode of tungsten wire with the length of 100mm and diameters of 11 mm, 16mm, 24 mm, and the anode diameter of 0.08 mm. The gas field used alcohol argon and bromine argon, while for the temperature variation was increased from the temperature of 30ºC to 70ºC. Data obtained from the detector test were in the form of counts per minute (cpm) as a function of operating voltage (V) of the detector. From data of the test, it was illustrated the counting-per-minute graph on the detector’s operation voltage, so that the plateau, slope and resolving time of the detector could be determined. Research results obtained showed that the volume of the detector tube was influential on the detector characteristic curve. When the detector tube was varied, the initial voltage also changed. The change of gas field types also affected the detector characteristic curve. If the gas field type used argon gas having low ionization potential, the initial voltage of the detector would be smaller. Meanwhile, the increment of the detector’s temperature affected the detector’s count number and only slightly affected the length of the plateau while for the slope was relatively the same. Key words : Geiger Muller detector, plateau, slope, resolving time Year : 2005

Item Type: Thesis (S1)
Subjects: Matematika dan Ilmu Pengetahuan Alam > Fisika
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Fisika
Depositing User: Eprints
Date Deposited: 21 Jun 2012 01:18
Last Modified: 21 Jun 2012 01:18
URI: http://eprints.uny.ac.id/id/eprint/379

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