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Title: Real-Time Transverse Emittance and Phase-Space Monitor

Abstract

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.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
776932
Report Number(s):
JLAB-ACC-97-42; DOE/ER/40150-1821
TRN: US0101772
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Journal Name:
Nuclear Instruments and Methods in Physics Research Section A, Vol. 407 (1-3) (1998) pp. 343-349
Additional Journal Information:
Journal Volume: 407; Other Information: Submitted to Nuclear Instruments and Methods in Physics Research Section A, Vol. 407 (1-3) (1998) pp. 343-349; PBD: 1 Jan 1998
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ALGORITHMS; CEBAF ACCELERATOR; DESIGN; BEAM MONITORS; PHASE SPACE; PHOTOCATHODES; REAL TIME SYSTEMS; BEAM EMITTANCE; FREE ELECTRON LASERS; COMPUTER CODES

Citation Formats

Jordan, K, Song, J, Piot, P, Legg, R, Kehne, D, Li, R, Feldl, E, Denard, J -C, Krafft, G A, Neil, G R, and Bohn, C L. Real-Time Transverse Emittance and Phase-Space Monitor. United States: N. p., 1998. Web.
Jordan, K, Song, J, Piot, P, Legg, R, Kehne, D, Li, R, Feldl, E, Denard, J -C, Krafft, G A, Neil, G R, & Bohn, C L. Real-Time Transverse Emittance and Phase-Space Monitor. United States.
Jordan, K, Song, J, Piot, P, Legg, R, Kehne, D, Li, R, Feldl, E, Denard, J -C, Krafft, G A, Neil, G R, and Bohn, C L. 1998. "Real-Time Transverse Emittance and Phase-Space Monitor". United States. https://www.osti.gov/servlets/purl/776932.
@article{osti_776932,
title = {Real-Time Transverse Emittance and Phase-Space Monitor},
author = {Jordan, K and Song, J and Piot, P and Legg, R and Kehne, D and Li, R and Feldl, E and Denard, J -C and Krafft, G A and Neil, G R and Bohn, C L},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/776932}, journal = {Nuclear Instruments and Methods in Physics Research Section A, Vol. 407 (1-3) (1998) pp. 343-349},
number = ,
volume = 407,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}