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Beam lifetime measurement and analysis in Indus-2 electron storage ring

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Abstract

In this paper, the beam lifetime measurement and its theoretical analysis are presented using measured vacuum pressure and applied radio frequency (RF) cavity voltage in Indus-2 electron storage ring at 2 GeV beam energy. Experimental studies of the effect of RF cavity voltage and bunched beam filling pattern on beam lifetime are also presented. An equation of stable beam current decay is evolved and this equation closely follows the observed beam current decay pattern. It shows that the beam is stable and the beam current decay is due to the beam–residual gas interaction (vacuum lifetime) and electron–electron interaction within a bunch (Touschek lifetime). The estimated vacuum, Touschek and total beam lifetimes from analytical formulations are also compared with the measured beam lifetime.

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Acknowledgements

Authors are thankful to Dr P D Gupta, Director, RRCAT, Dr Pitamber Singh, Head, Ion Accelerator Development Division, BARC, and Mr P R Hannurkar, Head, IOAPDD, for their encouragement and support for this work. The authors would like to thank Dr M Borland, APS Lab for providing help and for the useful discussion to implement and use ELEGANT code for the simulation of Touschek lifetime. They would also like to thank UHV group and Indus Accelerator Complex shift crewmembers for their help in conducting the beam experiments.

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Authors and Affiliations

  1. Indus operation and Accelerator Physics Design Division, Raja Ramanna Centre for Advanced Technology, Indore, 452 013, India

    PRADEEP KUMAR, A D GHODKE & GURNAM SINGH

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  1. PRADEEP KUMAR
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  2. A D GHODKE
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  3. GURNAM SINGH
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Correspondence to PRADEEP KUMAR.

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KUMAR, P., GHODKE, A.D. & SINGH, G. Beam lifetime measurement and analysis in Indus-2 electron storage ring. Pramana - J Phys 80, 855–871 (2013). https://doi.org/10.1007/s12043-013-0525-4

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  • DOI: https://doi.org/10.1007/s12043-013-0525-4

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