Design and study of Pierce electron gun Mohammad

Design and study of Pierce electron gun Mohammad Reza Khalvati-IPM

E-Gun • Electron Gun – Electron beam welding • Aerospace – – Electron beam machining Surface treatments Electron source for Linacs. Engraving on metals • Pierce electron Gun – Electrostatic field – Particle tracking without space charge Mohammad Reza Khalvati - IPM

Drilling • In the range of 0. 1 mm up to 1. 0 mm • Accuracy ± 20µm – – – Filtration Food/Juice Processing Aerospace Air Conveyors Waste Water Filtration Diesel injection nozzle http: //www. ebdrilling. com/applications. htm Mohammad Reza Khalvati - IPM

Electron Beam Welding • Conventional welding VS. EBW • Largest variety of dissimilar metals can be welded. • Front bearing housing • Compressor Rotor http: //www. camvaceng. com/electron-beam-welding/industry/aerospace Mohammad Reza Khalvati - IPM

Sterilization • Sterilization – single-use articles – natural products – implants and surgical materials • Disinfection and pathogen destruction – seeds of cereal crops and vegetables – foods such as cereals, herbs/spices, fruit and, eggs – Destruction of microbes in solid and liquid waste http: //www. fep. fraunhofer. de/en/Geschaeftsfelder/Elektronenstrahl-Anwendungen. html Mohammad Reza Khalvati - IPM

Texturing and Engraving • Photo transferred on a metal sheet. • The remelted spots are seen as darker. • Real size of the picture is about 60× 40 mm Mohammad Reza Khalvati - IPM

Pierce Electron Gun • Geometry Mohammad Reza Khalvati - IPM

Possible Software • • • E-Gun. Astra. GPT? Elegant. Comsol. Cst. Mohammad Reza Khalvati - IPM

EGUN • EGUN is a world famous simulation tool – Developed by Bill Herrmannsfeldt at SLAC • 2 D rectangular or axially symmetric – Electric and magnetic fields ! e l b a l i a v Not A Mohammad Reza Khalvati - IPM

ASTRA • A prototype 100 m. A injector of JLab • Approximation: – Import one-axis field (S-Fish or Poisson) in ASTRA. Mohammad Reza Khalvati - IPM

Any Suggestion? • Any 2 D dimension software? • GPT? Mohammad Reza Khalvati - IPM

Drawing! x(1) = 1; x(2) = 1. 7; x(3) = 2. 5; x(4) = 3. 4; x(5) = 4. 2; x(6) = 5. 5; x(7) = 6. 5; x(8) = 10; x(9) = 11; y(1) = 0; y(2) = 0. 73; y(3) = 1. 43; y(4) = 2. 13; y(5) = 1. 8; y(6) = 1. 1; y(7) = 2. 3; y(8) = 0. 8; y(9) = 0; Mohammad Reza Khalvati - IPM

2 D POISSON Simulation • Mohammad Reza Khalvati - IPM

Particle-In-Cell(PIC) • Import E & B from POISSON! • Solve Lorentz force eq. of motion numerically Mohammad Reza Khalvati - IPM

Bilinear Interpolation • SUPERFISH: Export fields on rectangular grid. – Field value at (x, y): Interpolate fields Mohammad Reza Khalvati - IPM

Test: Uniform E&B Ez Vx=0 Bz Vx≠ 0 Ez & B z Vx≠ 0 Mohammad Reza Khalvati - IPM

PIC code yet • Import E & B from POISSON! • Just track in 2 D plane yet. – Initial position & velocity: [r 0 z 0 0 0] Mohammad Reza Khalvati - IPM