Long beam pulses with SLED compression in DAΦNE LINAC

8th International Particle Accelerator Conference

Valente, Paolo^1 ; Belli, Maurizio^2 ; Buonomo, Bruno^2 ; Ceccarelli, Riccardo^2 ; Cecchinelli, Alberto^2 ; Clementi, Renato^2 ; Di Giulio, Claudio^2 ; Gennaro Foggetta, Luca^2 ; Piermarini, Graziano^2 ; Antonio Rossi, Luis^2 ; Strabioli, Serena^2 ; Zarlenga, Raffaele^2

INFN, Sezione di Roma, P.le Aldo Moro 2, Rome

I-00185, Italy^1

INFN, Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati (Rome)

I-00044, Italy^2

关键词: Accelerating fields;    Beam test facilities;    Energy spreads;    Intensity pulse;    MeV-Electrons;    Pulsing system;    Time distribution;    Travelling waves;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/874/1/012017/pdf
DOI  :  10.1088/1742-6596/874/1/012017

来源: IOP

【 摘 要 】

The DAΦNE LINAC is a ∼60 m long, S-band (2856 MHz) linear accelerator, made up by four 45 MW klystrons with SLED compression, and by 15 travelling-wave, 2/3π, SLAC-type, 3 m long accelerating sections. It serves as injector of the DAΦNE e+e- collider, providing 510 MeV, 10 ns long, electron and positron pulses of ≈1 nC, and to the Beam-Test Facility extraction line, with variable beam energy and intensity pulses, of length in the range 1.5 to 40 ns. A new pulsing system for the gun allows longer beam pulses, but the shape of the accelerating field in the sections due to the SLED compression has to be taken into account. We describe the tuning of the RF power, phase and delays in the pre-buncher, buncher and following accelerating sections, and the results of the tests performed in order to reach >200 ns, 500 MeV electron pulses and the characterization of the quality of the beam in terms of energy spread, time distribution, etc.