A multislit transverse-emittance diagnostic for space-charge-dominated electron beams

Conference · Sun Jun 01 04:00:00 EDT 1997

OSTI ID:489672

Piot, P; Song, J; Li, R ^[1]

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1. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); and others

Jefferson Lab is developing a 10 MeV injector to provide an electron beam for a high-power free-electron laser (FEL). To characterize the transverse phase space of the space-charged-dominated beam produced by this injector, the authors designed an interceptive multislit emittance diagnostic. It incorporates an algorithm for phase-space reconstruction and subsequent calculation of the Twiss parameters and emittance for both transverse directions at an update rate exceeding 1 Hz, a speed that will facilitate the transverse-phase-space matching between the injector and the FEL`s accelerator that is critical for proper operation. This paper describes issues pertaining to the diagnostic`s design. It also discusses the acquisition system, as well as the software algorithm and its implementation in the FEL control system. First results obtained from testing this diagnostic in Jefferson Lab`s Injector Test Stand are also included.

• Research Organization: Southeastern Universities Research Association, Inc., Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States); Office of Naval Research, Washington, DC (United States)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 489672
• Report Number(s): DOE/ER/40150--1124; JLAB-ACC--97-10; CONF-970503--17; ON: DE97006528
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
43 PARTICLE ACCELERATORS
BEAM EMITTANCE
DESIGN
DIAGNOSTIC TECHNIQUES
ELECTRON GUNS
FREE ELECTRON LASERS
MEASURING INSTRUMENTS
PERFORMANCE TESTING
PHASE SPACE
PHOTOCATHODES