Thermionic Emission & Variation of Anode Voltage and Filament Temperature | BMRIT 2nd Semester

Описание: Thermionic Emission & Variation of Anode Voltage and Filament Temperature | Radiological Physics | BMRIT 2nd Semester

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In this lecture, we discuss Thermionic Emission and the variation of anode voltage and filament temperature in the X-ray tube — an essential topic in Basic Physics and Radiological Physics (BMRIT 2nd Semester).

This concept is very important for:

BMRIT main exams

Radiography viva

Practical exams

University theory papers

🔬 Topics Covered in Detail:

✔ Definition of Thermionic Emission
✔ Role of tungsten filament
✔ Space charge effect
✔ Relationship between filament temperature and tube current (mA)
✔ Effect of anode voltage (kVp) on X-ray production
✔ Saturation current
✔ Graph explanation (mA vs Filament Temperature, mA vs kVp)
✔ Clinical importance in radiography

📌 Key Concepts:

• Increasing filament temperature → increases electron emission → increases tube current (mA)
• Increasing anode voltage (kVp) → increases kinetic energy of electrons → increases X-ray intensity & penetrating power
• Space charge limited region
• Saturation region

This lecture is explained in a simple, exam-oriented format for BMRIT students.

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