Note: design and development of improved indirectly heated cathode based strip electron gun.
An improved design of indirectly heated solid cathode based electron gun (200 kW, 45 kV, 270° bent strip type electron gun) has been presented. The solid cathode is made of thoriated tungsten, which acts as an improved source of electron at lower temperature. So, high power operation is possible without affecting structural integrity of the electron gun. The design issues are addressed based on the uniformity of temperature on the solid cathode and the single long filament based design. The design approach consists of simulation followed by extensive experimentation. In the design, the effort has been put to tailor the non-uniformity of the heat flux from the filament to the solid cathode to obtain better uniformity of temperature on the solid cathode. Trial beam experiments have been carried out and it is seen that the modified design achieves one to one correspondence of the solid cathode length and the electron beam length.
Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
Namita
N
Maiti
Department of Mechanical Engineering, Veermata Jijabai Technological Institute, Matunga, Mumbai 400 019, India.
Abhijeet
A
Bade
Department of Mechanical Engineering, Veermata Jijabai Technological Institute, Matunga, Mumbai 400 019, India.
G U
GU
Tembhare
Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
D S
DS
Patil
Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
K
K
Dasgupta