Abstracts Brochure - CERN

MOPLS — Poster Session 26-Jun-06 16:00 - 18:00
Random Phase Perturbations and Amplitude and Phase Tolerances in the Two-beam Accelerator
Driver with an Accompanying Wave
The effect of random phase perturbations on
the particle dynamics that arise when the A.V. Elzhov, E.A. Perelstein (JINR)
microwave power is extracted from the twobeam
accelerator driver with an accompanying wave is considered. The beam dynamics in the driver is simulated as
a function of the phase advance that occurs in the sections where the power is extracted from the driver. Tolerances
of the wave amplitude and phase in the power-extracting sections are determined. The allowable limits for the
accompanying-wave phase advance and jitter of the external accelerating field are found.
Beam and Thermal & Frequency Dynamics Calculation for the RELUS-5 Biperiodic Accelerating
System
Beam dynamics calculations in the electron
gun and in the 0.5 m long S-band accelerating
system show the following result: electron
energy may be controlled in the range from
D.A. Zavadtsev, A.I. Fadin, A.A. Krasnov, N.P. Sobenin (MEPhI)
A.A. Zavadtsev (Introscan)
3 to 5 MeV at peak beam current from 0.28 to 0.17 A respectively. The average beam power is 1 kW in any regime.
Dynamics calculations of thermal deformation and frequency shift after RF power-on were carried out for the designed
accelerating system. The thermal frequency stopway is 340 kHz at 1.3 kW power lost in the accelerating system. The
thermal time constant of the accelerating system is not higher than 20 sec.
New Accelerating Structure for Electron Linear Accelerators
The new radio-frequency accelerating structure
is intended for electron linear acceler- V.M. Pirozhenko (MRTI RAS)
ators. It combines advantages of travelingwave
and standing-wave structures. The structure ensures high efficiency of the acceleration inherent in the standingwave
structures that makes it possible to develop a linear accelerator with small length, to save RF power, and use
RF power source with relatively small power. The structure gives a possibility to vary output energy of the electron
beam in wide range by changing the beam loading. It ensures good matching with RF power source at varied
beam current and output energy that provides for good operation stability and gives a possibility to operate without
special matching devices. The structure is well suited for variable-energy electron linear accelerators, in particular,
for medical electron accelerators used for the radiation therapy, for accelerators applied in the industrial radiography,
and for cargo inspection complexes using dual-energy x-ray inspection with material identification.
143
MOPLS125
MOPLS126
MOPLS127