RUPAC2012 - List of Keywords (induction)

Paper	Title	Other Keywords	Page
TUPPB030	Computer Simulation of the Electron Beam Energy Spectrum Measurement by the Magnetic Analyzer Method Based on Scanning System of the Sterilization Installation	electron, acceleration, radiation, simulation	382
	P.A. Bystrov, M.A. Alekseev, N.E. Rozanov MRTI RAS, Moscow, Russia
	A method for measuring the characteristic, which makes possible to find the energy spectrum of the electron beam of the accelerator is described. This method uses the magnetic analyzer, which is based on the scanning system of the standing wave linear electron accelerator, mounted on the radiation sterilizer. This characteristic is the dependence of beam current, that reaches the induction sensor at the accelerator output window, on the magnetic field, deflecting the beam from the axis of the system. The results of the measurements of these characteristic, which were performed on the sterilization installation in MRTI, are presented. The computer simulation of electron beam dynamics in the scanning system for the case of these experiments was performed with the help of developed program "BEAM SCANNING". The similar dependence of the beam current on the magnetic field was obtained. The necessity of taking into account the effect of electron reflection from the walls of vacuum chamber is stated. To describe this effect the additional features were implemented in the program. As a result of calculations with the account of this effect, the correspondence of the calculated curve and experimental one was reached. This means that the calculated spectrum corresponds to the actual energy spectrum of the electron beam in the experiment.

WEPPD032	Multimode Digital Integrators For Precise Magnetic Measurements	vacuum, booster, controls, synchrotron	617
	A.V. Pavlenko, A.M. Batrakov, D. Shichkov BINP SB RAS, Novosibirsk, Russia P.V. Vagin DESY, Hamburg, Germany
	The induction method of magnetic measurement is the most important, widely used and oldest measurement method for particle accelerator magnets. Nevertheless, both the new demands of the accelerator techniques and possibilities of modern electronics stimulate the creation of more accurate and fast instrumentation, based on the induction method. This report describes the multimode integrators intended for magnetic measurements with the relative accuracy better than 10^-4 and even better than 10^-5 in special cases. Integrators provide high accuracy level both for the constant magnetic field measurements using movable coils and for the pulse measurements also. Modern digital techniques are used to get the partial integral of signal in the strongly determined time interval. The paper considers theoretical issues of the digital integration technique and related error sources. The structure of digital integrator is presented, and key features are listed. In conclusion a brief description of two magnetic measurement systems is given. The first system is used to measure the magnetic field transverse distribution in pulse elements, and the second one – to measure the harmonics in magnetic lenses with constant field.

Paper

Title

Other Keywords

Page

Computer Simulation of the Electron Beam Energy Spectrum Measurement by the Magnetic Analyzer Method Based on Scanning System of the Sterilization Installation

electron, acceleration, radiation, simulation

382

P.A. Bystrov, M.A. Alekseev, N.E. Rozanov
MRTI RAS, Moscow, Russia

A method for measuring the characteristic, which makes possible to find the energy spectrum of the electron beam of the accelerator is described. This method uses the magnetic analyzer, which is based on the scanning system of the standing wave linear electron accelerator, mounted on the radiation sterilizer. This characteristic is the dependence of beam current, that reaches the induction sensor at the accelerator output window, on the magnetic field, deflecting the beam from the axis of the system. The results of the measurements of these characteristic, which were performed on the sterilization installation in MRTI, are presented. The computer simulation of electron beam dynamics in the scanning system for the case of these experiments was performed with the help of developed program "BEAM SCANNING". The similar dependence of the beam current on the magnetic field was obtained. The necessity of taking into account the effect of electron reflection from the walls of vacuum chamber is stated. To describe this effect the additional features were implemented in the program. As a result of calculations with the account of this effect, the correspondence of the calculated curve and experimental one was reached. This means that the calculated spectrum corresponds to the actual energy spectrum of the electron beam in the experiment.

WEPPD032

Multimode Digital Integrators For Precise Magnetic Measurements

vacuum, booster, controls, synchrotron

617

A.V. Pavlenko, A.M. Batrakov, D. Shichkov
BINP SB RAS, Novosibirsk, Russia
P.V. Vagin
DESY, Hamburg, Germany

The induction method of magnetic measurement is the most important, widely used and oldest measurement method for particle accelerator magnets. Nevertheless, both the new demands of the accelerator techniques and possibilities of modern electronics stimulate the creation of more accurate and fast instrumentation, based on the induction method. This report describes the multimode integrators intended for magnetic measurements with the relative accuracy better than 10^-4 and even better than 10^-5 in special cases. Integrators provide high accuracy level both for the constant magnetic field measurements using movable coils and for the pulse measurements also. Modern digital techniques are used to get the partial integral of signal in the strongly determined time interval. The paper considers theoretical issues of the digital integration technique and related error sources. The structure of digital integrator is presented, and key features are listed. In conclusion a brief description of two magnetic measurement systems is given. The first system is used to measure the magnetic field transverse distribution in pulse elements, and the second one – to measure the harmonics in magnetic lenses with constant field.