Radiation damage study of thin YAG:Ce scintillator using low-energy protons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00319703" target="_blank" >RIV/68407700:21340/17:00319703 - isvavai.cz</a>

Výsledek na webu

<a href="http://iopscience.iop.org/article/10.1088/1748-0221/12/07/P07021/meta" target="_blank" >http://iopscience.iop.org/article/10.1088/1748-0221/12/07/P07021/meta</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1748-0221/12/07/P07021" target="_blank" >10.1088/1748-0221/12/07/P07021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radiation damage study of thin YAG:Ce scintillator using low-energy protons

Popis výsledku v původním jazyce

Radiation hardness of a 50microm thin YAG:Ce scintillator in a form of dependence of a signal efficiency on 3.1MeV proton fluence was measured and analysed using X-ray beam. The signal efficiency is a ratio of signals given by a CCD chip after and before radiation damage. The CCD chip was placed outside the primary beam because of its protection from damage which could be caused by radiation. Using simplified assumptions, the 3.1MeV proton fluences were recalculated to: (i) 150MeV proton fluences with intention to estimate radiation damage of this sample under conditions at proton therapy centres during medical treatment, (ii) 150MeV proton doses with intention to give a chance to compare radiation hardness of the studied sample with radiation hardness of other detectors used in medical physics, (iii) 1MeV neutron equivalent fluences with intention to compare radiation hardness of the studied sample with properties of position sensitive silicon and diamond detectors used in nuclear and particle physics. The following results of our research were obtained. The signal efficiency of the studied sample varies slightly (±3%) up to 3.1MeV proton fluence of c. (4- 8) x 10e14 cm-2. This limit is equivalent to 150MeV proton fluence of (5- 9) x 10e16 cm-2, 150MeV proton dose of (350-600) kGy and 1MeV neutron fluence of (1-2) x 10e16 cm-2. Beyond the limit, the signal efficiency goes gradually down. Fifty percent decrease in the signal efficiency is reached around 3.1MeV fluence of (1-2) x 10e16 cm-2 which is equivalent to 150MeV proton fluence of around 2 x 10e18 cm-2, 150MeV proton dose of around 15MGy and 1MeV neutron equivalent fluence of (4-8) x 10e17 cm-2. In contrast with position sensitive silicon and diamond radiation detectors, the studied sample has at least two order of magnitude greater radiation resistance. Therefore, YAG:Ce scintillator is a suitable material for monitoring of primary beams of particles of ionizing radiation.

Název v anglickém jazyce

Radiation damage study of thin YAG:Ce scintillator using low-energy protons

Popis výsledku anglicky

Radiation hardness of a 50microm thin YAG:Ce scintillator in a form of dependence of a signal efficiency on 3.1MeV proton fluence was measured and analysed using X-ray beam. The signal efficiency is a ratio of signals given by a CCD chip after and before radiation damage. The CCD chip was placed outside the primary beam because of its protection from damage which could be caused by radiation. Using simplified assumptions, the 3.1MeV proton fluences were recalculated to: (i) 150MeV proton fluences with intention to estimate radiation damage of this sample under conditions at proton therapy centres during medical treatment, (ii) 150MeV proton doses with intention to give a chance to compare radiation hardness of the studied sample with radiation hardness of other detectors used in medical physics, (iii) 1MeV neutron equivalent fluences with intention to compare radiation hardness of the studied sample with properties of position sensitive silicon and diamond detectors used in nuclear and particle physics. The following results of our research were obtained. The signal efficiency of the studied sample varies slightly (±3%) up to 3.1MeV proton fluence of c. (4- 8) x 10e14 cm-2. This limit is equivalent to 150MeV proton fluence of (5- 9) x 10e16 cm-2, 150MeV proton dose of (350-600) kGy and 1MeV neutron fluence of (1-2) x 10e16 cm-2. Beyond the limit, the signal efficiency goes gradually down. Fifty percent decrease in the signal efficiency is reached around 3.1MeV fluence of (1-2) x 10e16 cm-2 which is equivalent to 150MeV proton fluence of around 2 x 10e18 cm-2, 150MeV proton dose of around 15MGy and 1MeV neutron equivalent fluence of (4-8) x 10e17 cm-2. In contrast with position sensitive silicon and diamond radiation detectors, the studied sample has at least two order of magnitude greater radiation resistance. Therefore, YAG:Ce scintillator is a suitable material for monitoring of primary beams of particles of ionizing radiation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Instrumentation

ISSN

1748-0221

e-ISSN

1748-0221

Svazek periodika

12

Číslo periodika v rámci svazku

07

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

32

Strana od-do

1-32

Kód UT WoS článku

000406392600021

EID výsledku v databázi Scopus

2-s2.0-85026742414