Reduction of beam corkscrew motion on the ETAII linear induction accelerator

Conference · Tue Sep 04 04:00:00 EDT 1990

OSTI ID:6631460

Turner, W C; Allen, S L; Brand, H R; Caporaso, G J; Chambers, F W; Chen, Y -J; Coffield, F E; Deadrick, F J; Decker, T A; Griffith, L V; Lager, D L; Mauer, W J; Nexsen, W E; Paul, A C; Renbarger, V L; Sampayan, S

The ETAII linear induction accelerator (6MeV, 3kA, 70ns) is designed to drive a microwave free electron laser (FEL) and demonstrate the front end accelerator technology for a shorter wavelength FEL. Performance to date has been limited by beam corkscrew motion that is driven by energy sweep and misalignment of the solenoidal focusing magnets. Modifications to the pulse power distribution system and magnetic alignment are expected to reduce the radius of corkscrew motion from its present value of 1 cm to less than 1 mm. The modifications have so far been carried out on the first 2.7 MeV (injector plus 20 accelerator cells) and experiments are beginning. In this paper we will present calculations of central flux line alignment, beam corkscrew motion and beam brightness that are anticipated with the modified ETAII. 10 refs., 4 figs., 1 tab.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOD; DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6631460
• Report Number(s): UCRL-JC-103785; CONF-9009123--29; ON: DE91000651
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
ALIGNMENT
BEAM DYNAMICS
BEAM FOCUSING MAGNETS
BEAM LUMINOSITY
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FREE ELECTRON LASERS
LASERS
LINEAR ACCELERATORS
MAGNETS
MODIFICATIONS
TUNING