IPAC'10 - List of Keywords (longitudinal-dynamics)

A B C D E F G H I K L M N O P Q R S T U V W

longitudinal-dynamics

Paper	Title	Other Keywords	Page
MOPD095	Various Improvements to Operate the 1.5 GeV HDSM at MAMI	linac, injection, klystron, dipole	927
	M. Dehn, O. Chubarov, H. Euteneuer, R.G. Heine, A. Jankowiak, H.-J. Kreidel, O. Ott IKP, Mainz
	During the last three years at the 1.5 GeV Harmonic Double Sided Microtron (HDSM)* of MAMI a lot of improvements concerning the longitudinal operation of the accelerator were tested and installed. To monitor the rf power dissipated in the accelerating sections, their cooling water flow and its temperature rise are now continuously logged. Phase calibration measurements of the linacs and the rf-monitors revealed nonlinearities of the high precision step-motor driven waveguide phase shifters. They were recalibrated to deliver precise absolute values. Thereby it is now possible to measure not only the first turn's phase very exactly, but also determine the linac's rf-amplitude within an error of less than 5%, using the well known longitudinal dispersion of the bending system. These results are compared to the thermal load measurements. For parity violating experiments the beam energy has to be stabilised to some ppm. A dedicated system measuring the time-of-flight through a bending magnet is now used in routine operation and controls the output energy via the proper linac phases. * K.-H. Kaiser et al., NIM A 593 (2008) 159 - 170, doi:10.1016/j.nima.2008.05.018

Paper

Title

Other Keywords

Page

MOPD095

Various Improvements to Operate the 1.5 GeV HDSM at MAMI

linac, injection, klystron, dipole

927

M. Dehn, O. Chubarov, H. Euteneuer, R.G. Heine, A. Jankowiak, H.-J. Kreidel, O. Ott
IKP, Mainz

During the last three years at the 1.5 GeV Harmonic Double Sided Microtron (HDSM)* of MAMI a lot of improvements concerning the longitudinal operation of the accelerator were tested and installed. To monitor the rf power dissipated in the accelerating sections, their cooling water flow and its temperature rise are now continuously logged. Phase calibration measurements of the linacs and the rf-monitors revealed nonlinearities of the high precision step-motor driven waveguide phase shifters. They were recalibrated to deliver precise absolute values. Thereby it is now possible to measure not only the first turn's phase very exactly, but also determine the linac's rf-amplitude within an error of less than 5%, using the well known longitudinal dispersion of the bending system. These results are compared to the thermal load measurements. For parity violating experiments the beam energy has to be stabilised to some ppm. A dedicated system measuring the time-of-flight through a bending magnet is now used in routine operation and controls the output energy via the proper linac phases.

* K.-H. Kaiser et al., NIM A 593 (2008) 159 - 170, doi:10.1016/j.nima.2008.05.018