مقاله پژوهشی: بررسی عملکرد یک آشکارساز صفحه عایق با اندازه‌گیری نرخ شمارش

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه فیزیک، دانشکده علوم پایه، دانشگاه صنعتی سهند، تبریز، ایران

2 دانشجوی دکترا، گروه فیزیک، دانشکده علوم پایه، دانشگاه صنعتی سهند، تبریز، ایران

چکیده

آشکارساز صفحه عایق یک آشکارساز ذرات گازی برای استفاده در آزمایش‌های فیزیک ذرات است و امروزه کاربردهای متنوع آن درصنعت قابل مشاهده است. نمونه‌ای از آشکارساز صفحه عایق تک‌گاف با پهنای گاف mm 2 از ورقه­های شیشه‌ای ساخته شده است. در این آشکارساز برای سادگی تنها از یک ورقه مربعی آلومینیومی cm2 10×10 برای دریافت علامت استفاده شد. یک مدار الکترونیکی در آزمایشگاه طراحی و ساخته شده که بتواند علامت تولید شده در آشکارساز را دریافت، تقویت و در قالب تعداد رخدادها در واحد زمان (نوفه) در رایانه ثبت نماید. در این مطالعه از نرخ شمارش ذرات برای بررسی عملکرد آشکارساز استفاده نموده و نشان داده­ایم که با افزودن لایه­های محافظ آهنی بر بالای آشکارساز بخشی از ذرات مرتبط با پرتوهای کیهانی حذف می­شوند و میزان نرخ شمارش کاهش می­یابد. همچنین حساسیت آشکارساز به فوتون­های keV 60 مربوط به چشمه امرسیوم بررسی شد. با وجود مشاهده افزایش نرخ شمارش در حضور چشمه، کارایی آشکارساز برای مشاهده گاماهای keV 60 بسیار پایین است. تمام اندازه­گیری­ها در چندین ولتاژ بالای اعمالی در ناحیه 1 تا kV 3 تکرار شده­اند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Research Paper: Evaluating the Performance of a Resistive Plate Chamber by Measurement of the Detector’s Count Rate

نویسندگان [English]

  • Yousef Pezeshkian 1
  • Majid Ahmadpouri 2
1 Assistant Professor, Department of Physics, Sahand University of Technology, Tabriz, Iran
2 PhD Student, Physics department, Sahand University of Technology, Tabriz, Iran
چکیده [English]

Resistive plate chamber (RPC) is a gaseous particle detector primarily developed for particle physics experiments and found vast applications in industry. We have constructed a prototype of a single gap glass RPC, with gap width of 2 mm. For simplicity, this prototype has a single 10×10 cm2 Al pad to readout the detector’s signals. An electronic board is designed and built at our laboratory to receive, amplify and register pulses as counts per unit time at the computer. In this study, we have used the count rate (noise) as an indicator of the detector's performance. We observed that the count rate reduced in the presence of Fe shields above the detector, due to the absorption of particles related to the cosmic rays. We also studied the sensitivity of the detector to the 60 keV gammas of the Am source. Although an increase in the count rate in the presence of the 241Am source is evident, the efficiency of the detector to 60 keV gammas is very small. All of the measurements are performed at several high voltages between 1 kV and 3 kV.

کلیدواژه‌ها [English]

  • Resistive Plate Chamber (RPC)
  • Gaseous detector
  • cosmic muons
  • Americium source
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