Longitudinal bunch length measurement of RFQ beam using in-house developed detector system. (7th September 2017)

• Record Type: Journal Article
• Authors: Pandey, H.K.; Dechoudhury, S.; Bhattacharyya, T.K.; Chakrabarti, A.
• Is Part Of: Journal of instrumentation. Volume 12:Number 9(2017:Sep.)
• Page Start: T09001
• Page End: T09001
• Publication Date: 2017-09-07
• Subjects: Beam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors) -- Instrumentation for heavy-ion accelerators; Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/12/09/T09001
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: We report here the bunch width measurement of 98keV/u ion beam accelerated through a 3.4 m long 37.8 MHz Radio Frequency Quadruple (RFQ) linac using a minimally interceptive approach. The detector system for this measurement has been indigenously developed and is based on secondary electron emission from tungsten filament on being hit by ion beam, followed by a capacitive loaded helical resonator cavity. A Channeltron Electron Multiplier (CEM) detector is used for detection of electrons. The design, development and optimization of various parameters of bunch width detector system along with its deflector cavity applicable in the low frequency regime (few tens of MHz) have been discussed. The measured bunch profile of accelerated Nitrogen beam from RFQ is in close agreement with the estimated profile obtained via simulation.