Improved ETA-II accelerator performance

Author

Weir, J.T. ; Boyd, J.K. ; Chen, Y.J. ; Clark, J.C. ; Lager, D.L. ; Paul, A.C.

Author_Institution

Lawrence Livermore Nat. Lab., CA, USA

Volume

5

fYear

1999

fDate

1999

Firstpage

3513

Abstract

Improvements have been made in the performance of the ETA-II accelerator that allow a nominal 2 kA, 6 MeV beam to be focused to a spot size less that 1 mm in diameter. The improvements include reducing the energy sweep to less than ±0.5% over 40 ns of the pulse using a real time energy diagnostic and improving the magnetic tune of the accelerator to reduce the emittance to 8 cm-mrad. Finally, an automated tuning system (MAESTRO) was run to minimize the time dependent centroid motion (corkscrew) by adjusting the steering dipoles over the focusing solenoids. The corkscrew motion was reduced to less than ±0.5 mm at the output of the accelerator

Keywords

electron accelerators; electron beam focusing; linear accelerators; particle beam stability; 2 kA; 6 MeV; ETA-II accelerator performance; MAESTRO; automated tuning system; corkscrew motion; focusing solenoids; magnetic tune; real time energy diagnostic; steering dipoles; time dependent centroid motion; Coils; Computer bugs; Displays; Solenoids; Steering systems; Switched capacitor circuits; Switching circuits; Time of arrival estimation; Timing; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.792354

Filename

792354