Real-Time Transverse Emittance and Phase-Space Monitor

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A real-time multislit [1] transverse-emittance monitor has been developed for diagnosing the space-charge-dominated beam in the 10MeV injection line of the FEL at Thomas Jefferson National Accelerator Facility (formerly CEBAF). It gives emittance, Twiss parameters, and phase-space contours (without any symmetry assumptions) at the update rate of 1Hz. It reduces measurement noise in real-time, and incorporates a special algorithm for constructing the phase-space matrix, which yields more accurate results by sweeping the beam across the slits. In this paper we will discuss issues relevant to the software design and implementation. Experimental results obtained from a 250keV photocathode gun will also ... continued below

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53 Kilobytes pages

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Jordan, K.; Song, J.; Piot, P.; Legg, R.; Kehne, D.; Li, R. et al. January 1, 1998.

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A real-time multislit [1] transverse-emittance monitor has been developed for diagnosing the space-charge-dominated beam in the 10MeV injection line of the FEL at Thomas Jefferson National Accelerator Facility (formerly CEBAF). It gives emittance, Twiss parameters, and phase-space contours (without any symmetry assumptions) at the update rate of 1Hz. It reduces measurement noise in real-time, and incorporates a special algorithm for constructing the phase-space matrix, which yields more accurate results by sweeping the beam across the slits. In this paper we will discuss issues relevant to the software design and implementation. Experimental results obtained from a 250keV photocathode gun will also be presented and compared with other methods and with PARMELA simulations.

Physical Description

53 Kilobytes pages

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  • Journal Name: Nuclear Instruments and Methods in Physics Research Section A, Vol. 407 (1-3) (1998) pp. 343-349; Journal Volume: 407; Other Information: Submitted to Nuclear Instruments and Methods in Physics Research Section A, Vol. 407 (1-3) (1998) pp. 343-349

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  • Report No.: JLAB-ACC-97-42
  • Report No.: DOE/ER/40150-1821
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 776932
  • Archival Resource Key: ark:/67531/metadc715892

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  • January 1, 1998

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 8:29 p.m.

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Jordan, K.; Song, J.; Piot, P.; Legg, R.; Kehne, D.; Li, R. et al. Real-Time Transverse Emittance and Phase-Space Monitor, article, January 1, 1998; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc715892/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.