| Paper |
Title |
Page |
| TUPMA076 |
Design and Development of Beam Transport Elements for the BARC-ECIL Linac
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220 |
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- P. Roychowdhury, D. P. Chakravarthy, P. Jain, K. C. Mittal, A. K. Ray
BARC, Mumbai
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A 10 MeV, 2 kW RF electron linac is under development for cargo scanning. It consists of electron gun, RF linac structure, solenoid focusing magnets, steering magnet, beam diagnostics and x-ray target. The beam diameter requirement at the target is 2mm. Since the beam is to be focused to a diameter of 2mm at the target; the transverse beam optics of the whole linac structure from gun end to the target has been simulated by solving the beam envelope equation. The beam envelope equation has been solved in radial direction by Runga-Kutta method consisting of external focusing field, RF fields, beam perveance and emittance. Various combinations of solenoid magnet focusing have been studied. It has been found that three solenoid magnets are required to focus the beam to a diameter of 2mm at the target, two between the electron gun and the linac entrance and the other between the linac exit and the target. Based on these studies two solenoid magnets has been designed and fabricated. Details of beam optics simulation results and the design of the solenoid magnets will be presented.
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| WEPMA014 |
Inhomogenous Field Wien Filter Design
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354 |
| |
- P. Jain, D. P. Chakravarthy, A. K. Ray, P. Roychowdhury
BARC, Mumbai
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The Wien velocity filter is a useful device that transports pure proton fraction from high-power ECR proton source to the RFQ. It is a deflecting device having crossed electrostatic and magnetostatic fields both perpendicular to the beam trajectory that deflects and eliminates the undesired species of ions from the main beam. A tilted-pole Wien filter (*) surpasses the classical parallel-rectangular-poles Wien filter in performance as the former eliminates the astigmatism. The present paper describes the design of an inhomogeneous field Wien filter where the equations of motion are developed and solved in a first-order approximation for a paraxial ion beam inside an ExB mass separator without considering the space charge effects. References : (*) New tilted-poles Wien filter with enhanced performance Review of Scientific Instruments 60 (3), March 1989
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