Demonstration of a real-time interferometer as a bunch-lenght monitor in a high-current electron beam accelerator

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A real-time interferometer (RTI) has been developed to monitor the bunch length of an electron beam in an accelerator. The RTI employs spatial autocorrelation, reflective optics, and a fast response pyro-detector array to obtain a real-time autocorrelation trace of the coherent radiation from an electron beam thus providing the possibility of online bunch-length diagnostics. A complete RTI system has been commissioned at the A0 photoinjector facility to measure sub-mm bunches at 13 MeV. Bunch length variation (FWHM) between 0.8 ps (-0.24 mm) and 1.5 ps (-0.45 mm) has been measured and compared with a Martin-Puplett interferometer and a streak camera. ... continued below

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16 pages

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Thangaraj, J.; Thurman-Keup, R.; Ruan, J.; Johnson, A.S.; Lumpkin, A; Santucci, J. et al. March 1, 2012.

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A real-time interferometer (RTI) has been developed to monitor the bunch length of an electron beam in an accelerator. The RTI employs spatial autocorrelation, reflective optics, and a fast response pyro-detector array to obtain a real-time autocorrelation trace of the coherent radiation from an electron beam thus providing the possibility of online bunch-length diagnostics. A complete RTI system has been commissioned at the A0 photoinjector facility to measure sub-mm bunches at 13 MeV. Bunch length variation (FWHM) between 0.8 ps (-0.24 mm) and 1.5 ps (-0.45 mm) has been measured and compared with a Martin-Puplett interferometer and a streak camera. The comparisons show that RTI is a viable, complementary bunch length diagnostic for sub-mm electron bunches.

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16 pages

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  • Journal Name: Rev.Sci.Instrum.83:043302,2012; Journal Volume: 83; Journal Issue: 4

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  • Report No.: FERMILAB-PUB-12-070-APC
  • Grant Number: AC02-07CH11359
  • DOI: 10.1063/1.3698388 | External Link
  • Office of Scientific & Technical Information Report Number: 1038937
  • Archival Resource Key: ark:/67531/metadc840540

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  • March 1, 2012

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 26, 2016, 4:14 p.m.

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Thangaraj, J.; Thurman-Keup, R.; Ruan, J.; Johnson, A.S.; Lumpkin, A; Santucci, J. et al. Demonstration of a real-time interferometer as a bunch-lenght monitor in a high-current electron beam accelerator, article, March 1, 2012; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc840540/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.