Development of transverse beam emittance measurement system using slit-grid technique for LEHIPA

Design and development of transverse beam emittance measurement system using slit-grid technique for Low Energy High Intensity Proton Accelerator (LEHIPA) is done at BARC. The system is proposed to be used in the low energy beam transport section of LEHIPA for the 50 keV proton beam. Simulations are done in CST Particle Studio to optimize the dimensions of various mechanical components. The front-end electronics is developed to measure current from 32 channels corresponding to the same number of wires in the grid/harp. Each channel has 5 gains which can measure input over 5 decades (200 nA/V to 2 mA/V). The outputs of all channels are digitized and the values are fed to the PC for evaluation of emittance. The entire process of motion of slit and (or) grid, gain switching, data acquisition and evaluation of beam emittance with graphical representations is completely automated using an integrated application software developed in Qt. (author)