A METHOD FOR THE DETERMINING OF THE K FACTOR IN ELECTRON BEAM ACCELERATOR

Shalina Sheik Muhamad; Ahmad Zainuri Mohd Dzomir; Hasan Sham; Muhd Izham Ahmad; Mohamad Hakiman Mohamad Yusoff; Azmi Ali; Ruzalina Baharin; Siti Zulaiha Hairaldin; Ros Anita Ahmad Ramli

Shalina Sheik Muhamad, Dr. Malaysian Nuclear Agency
Ahmad Zainuri Mohd Dzomir Malaysian Nuclear Agency
Hasan Sham Malaysian Nuclear Agency
Muhd Izham Ahmad Malaysian Nuclear Agency
Mohamad Hakiman Mohamad Yusoff Malaysian Nuclear Agency
Azmi Ali Malaysian Nuclear Agency
Ruzalina Baharin Malaysian Nuclear Agency
Siti Zulaiha Hairaldin Malaysian Nuclear Agency
Ros Anita Ahmad Ramli Malaysian Nuclear Agency

Keywords: absorbed dose, accelerator, Alanine dosimeters

Abstract

Abstract

The absorbed dose received by an irradiated product depends on the following factors: the characteristics of the beam, which consist of electron energy, average beam current, scan width and scan uniformity; the conveyor speed; the product composition and density; the composition, density and thickness of material; and the distance of output window to the product. The significant parameters controlled by the operator were the characteristics of the beam and the conveyor speed. As this accelerator has been used for various applications in radiation processing, product surface doses must be set and utilized through operational qualification such as beam energy, beam current, scan width and conveyor speed. In this work, we have described a simple method for determining the K factor for the 3 MeV facility. The qualification was carried out using Alanine dosimeters and the calculations were evaluated according to ISO/ASTM 51649 and ISO 11137-3. The relative uncertainty of the measurements was estimated to be 4.20-7.10 %.

Abstrak

Dos yang diserap yang diterima oleh produk yang disinari bergantung kepada faktor-faktor berikut: ciri-ciri rasuk, yang terdiri daripada tenaga elektron, arus rasuk purata, lebar imbasan dan keseragaman imbasan; kelajuan penghantar; komposisi dan ketumpatan produk; komposisi, ketumpatan dan ketebalan bahan; dan jarak tetingkap keluaran ke produk. Parameter penting yang dikawal oleh pengendali ialah ciri-ciri rasuk dan kelajuan penghantar. Memandangkan pemecut ini telah digunakan untuk pelbagai aplikasi dalam pemprosesan sinaran, dos permukaan produk mesti ditetapkan dan digunakan melalui kelayakan operasi seperti tenaga rasuk, arus rasuk, lebar imbasan dan kelajuan penghantar. Dalam kerja ini, kami telah menerangkan kaedah mudah untuk menentukan faktor K untuk kemudahan 3 MeV. Kelayakan telah dijalankan menggunakan dosimeter Alanine dan pengiraan telah dinilai mengikut ISO/ASTM 51649 dan ISO 11137-3. Ketidakpastian relatif pengukuran dianggarkan 4.20-7.10%.