PENENTUAN SENSITIVITAS DETEKTOR SINAR-X BERBASIS FOTOTRANSISTOR

http://doi.org/10.22216/jit.2015.v9i4.391


Ramacos Fardela(1*)

(1) Teknik Komputer-Sekolah Tinggi Teknologi Payakumbuh
(*) Corresponding Author

Abstract


Abstract

X-ray interaction with matter can produce phenomenon of fluorescence that emits visible light. This phenomenon was exploited to design an x-ray detector based on phototransistor by attaching a screen ZnS(Ag) on the surface of the phototransistor which is arraponged in a Darlington circuit. Detection of active region of detector was done by collimating of x-rays beam from the x-ray generator tube Philips 2000 watts, 60 kV type PW 2215/20 NR 780 026 and measure the detector output voltage (Vout) at change in x-ray intensity . The experimental results showed that the Darlington circuit can be applied to design the detector of x-ray based on phototransistor. Sensitivity of detector used 0,037 mV and offset 130 mV.

Keywords: Detector , Phototransistor , X-ray , Screen ZnS ( Ag )

 

Abstrak

Interaksi sinar-x dengan materi dapat menghasilkan gejala fluoresensi yang mengemisikan cahaya tampak. Fenomena ini dimanfaatkan untuk merancang detektor sinar-x berbasis fototransitor dengan menempelkan layar pemendar ZnS(Ag) di permukaan fototransistor yang disusun dalam rangkaian Darlington. Pengukuran sensitivitas detektor dilakukan dengan langkah mengkolimasi berkas sinar-x dari tabung pembangkit sinar-x Philips 2000 watt, 60 kV tipe PW 2215/20 NR 780026 dan mengukur tegangan keluaran detektor (Vout) terhadap perubahan intensitas sinar-x. Berdasarkan hasil eksperimen menunjukkan bahwa rangkaian Darlington dapat diterapkan untuk merancang detektor sinar-x berbasis fototransistor. Sensitivitas detektor didapatkan sebesar 0,037 mV dan gelinciran 130 mV.

Kata kunci: Detektor, fototransistor, Sinar-X, Layar ZnS(Ag)


Keywords


Detektor, fototransistor, Sinar-X, Layar ZnS(Ag)

Full Text:

PDF

References


Abdullah, J., Cassanello, M. C. F., Dudukovic, M. P., Dyakowski, T., Hamada, M. M., Jin, J. H., … Thyn, J. (2008). Industrial Process Gamma Tomography. Iaea-Tecdoc-1589.

Fraden, J. (2013). Handbook of Modern Sensor.http://doi.org/10.1017/CBO9781107415324.004

Grupen, Claus and Burat, Irene. 2011. Hanbook of Particel Detection and Imaging, Springer, New York, USA.

Hendee, W. R., Ritenour, E. R., & Hoffmann, K. R. (2003). Medical Imaging Physics, Fourth Edition. Medical Physics (Vol. 30). http://doi.org/10.1118/1.1563664

Kusminarto and Susilo. (2004). Phototransistor Based Position Sensitive Detector for Signal Detection in Photothermal Spectroscopy. Matematika Dan Sains, 9(2), 229–232.

Rahman. 2012. Pengembangan Detektor Sinar-X Berbasis Fotodetektor. Skripsi S1. Universitas Gadjah Mada. Yogyakarta.


Refbacks



Copyright (c) 2016 Jurnal Ipteks Terapan

Online ISSN : 2460-5611 | Print ISSN : 1979-9292

Publish by LLDIKTI Wilayah X (Sumatera Barat, Riau, Jambi dan Kepulauan Riau)

Jl. Khatib Sulaiman No 1 Kota Padang. Kode Pos 25144. Telp 0751-7056737. Fax 0751-7056737. Website:http://www.kopertis10.or.id

Web Analytics Made Easy - StatCounter View My Stats

Creative Commons License 

This work is licensed under a Creative Commons Attribution 4.0 International License.