RUPAC2012 - List of Authors (Rybitskaya, T.V.)

Paper	Title	Page
WEPPC019	Improvement of Quadrupole Magnets Field Quality in Serial Production	486
	A.A. Starostenko, P.N. Burdin, T.A. Devyataikina, E.S. Kazantseva, T.V. Rybitskaya, B.A. Skarbo, A.S. Tsyganov BINP SB RAS, Novosibirsk, Russia
	Technology of production of quadrupole magnets for NSLSII main ring is presented in the article. Quadrupoles have laminated iron yokes. The technology was developed in Budker Institute of Nuclear Physics. It includes method of correction octupole and sextupole harmonics. Field quality measurements of ready magnets are presented.

WEPPC020	Quadrupole Harmonics Tuning by Nose Pieces	489
	T.V. Rybitskaya, E.S. Kazantseva, B.A. Skarbo, A.A. Starostenko, A.S. Tsyganov BINP SB RAS, Novosibirsk, Russia
	A part of quadrupole lenses for NSLS-II main ring were manufactured at Budker Institute of Nuclear Physics. Some types of lenses have nose pieces on poles. Nose pieces permits correcting magnetic field harmonics. Corrections of octupoles, sextupoles and allowed harmonics were realized. Also corrections of amplitude of dependence sextupole harmonic from current were realized for some lenses.

WEPPC021	Nonlinear Shunting as a Method of Magnetic Field Correction in Quadrupole Lenses	492
	A.S. Tsyganov, E.S. Kazantseva, T.V. Rybitskaya, B.A. Skarbo, A.A. Starostenko BINP SB RAS, Novosibirsk, Russia
	Magnetic field quality requirements of lenses in modern particle accelerators are high. For example, harmonic fields of quadrupole lenses (manufactured in BINP SB RAS) of main ring of synchrotron source NSLS-II, must have no more than 1-2·10^-4 from the field at 75% of the aperture of the lens. Various methods of mechanical improvements are used to adjust the fields in the production process of magnetic lenses. Mechanical improvements result in increased time and cost of production. The report proposes a method for precise nondestructive correction of some magnetic field harmonics of the quadrupole lenses. Correction is performed using an additional element - non-linear current shunt of some coils. The report contains experimental data showing the possibilities of this method.

WEPPC022	Stand for Precision Measurements of Magnetic Lenses Field Quality	495
	A.S. Tsyganov, A.M. Batrakov, E.S. Kazantseva, A.V. Pavlenko, T.V. Rybitskaya, D. Shichkov, B.A. Skarbo, A.A. Starostenko, P. Vobly BINP SB RAS, Novosibirsk, Russia
	Strict requirements are imposed on the field quality of magnetic elements in today’s synchrotron radiation sources. For example, magnetic field harmonics of quadrupole lenses (currently manufactured in BINP) of main ring NSLS-II, should have no more than one or two ten-thousandths parts of main harmonic at the 75% of lens aperture. The stand is designed for precise measurement of the quadrupole lenses. The well-known technique with a rotating coil was used. The design and location of coils used in the measuring shaft and the method of commutation allow to compensate for both quadrupole and dipole components of the magnetic field. This, in turn, minimizes shaft beats effect and power supply noises effect on the accuracy of the results. During measurements, the shaft is rotated without stopping, and the data received from the gauge angle and digital integrators are processed "on the fly" strictly synchronous. The measurement procedure is performed in one and a half turn of the shaft and takes six seconds. The report describes mechanical design of the stand, principle of work, parameters of the equipment, and software. Results of measurements of the quadrupole lenses synchrotron source NSLS-II are given in conclusion. The results demonstrate possibilities of the stand.

Paper

Title

Page

Improvement of Quadrupole Magnets Field Quality in Serial Production

486

A.A. Starostenko, P.N. Burdin, T.A. Devyataikina, E.S. Kazantseva, T.V. Rybitskaya, B.A. Skarbo, A.S. Tsyganov
BINP SB RAS, Novosibirsk, Russia

Technology of production of quadrupole magnets for NSLSII main ring is presented in the article. Quadrupoles have laminated iron yokes. The technology was developed in Budker Institute of Nuclear Physics. It includes method of correction octupole and sextupole harmonics. Field quality measurements of ready magnets are presented.

WEPPC020

Quadrupole Harmonics Tuning by Nose Pieces

489

T.V. Rybitskaya, E.S. Kazantseva, B.A. Skarbo, A.A. Starostenko, A.S. Tsyganov
BINP SB RAS, Novosibirsk, Russia

A part of quadrupole lenses for NSLS-II main ring were manufactured at Budker Institute of Nuclear Physics. Some types of lenses have nose pieces on poles. Nose pieces permits correcting magnetic field harmonics. Corrections of octupoles, sextupoles and allowed harmonics were realized. Also corrections of amplitude of dependence sextupole harmonic from current were realized for some lenses.

WEPPC021

Nonlinear Shunting as a Method of Magnetic Field Correction in Quadrupole Lenses

492

A.S. Tsyganov, E.S. Kazantseva, T.V. Rybitskaya, B.A. Skarbo, A.A. Starostenko
BINP SB RAS, Novosibirsk, Russia

Magnetic field quality requirements of lenses in modern particle accelerators are high. For example, harmonic fields of quadrupole lenses (manufactured in BINP SB RAS) of main ring of synchrotron source NSLS-II, must have no more than 1-2·10^-4 from the field at 75% of the aperture of the lens. Various methods of mechanical improvements are used to adjust the fields in the production process of magnetic lenses. Mechanical improvements result in increased time and cost of production. The report proposes a method for precise nondestructive correction of some magnetic field harmonics of the quadrupole lenses. Correction is performed using an additional element - non-linear current shunt of some coils. The report contains experimental data showing the possibilities of this method.

WEPPC022

Stand for Precision Measurements of Magnetic Lenses Field Quality

495

A.S. Tsyganov, A.M. Batrakov, E.S. Kazantseva, A.V. Pavlenko, T.V. Rybitskaya, D. Shichkov, B.A. Skarbo, A.A. Starostenko, P. Vobly
BINP SB RAS, Novosibirsk, Russia

Strict requirements are imposed on the field quality of magnetic elements in today’s synchrotron radiation sources. For example, magnetic field harmonics of quadrupole lenses (currently manufactured in BINP) of main ring NSLS-II, should have no more than one or two ten-thousandths parts of main harmonic at the 75% of lens aperture. The stand is designed for precise measurement of the quadrupole lenses. The well-known technique with a rotating coil was used. The design and location of coils used in the measuring shaft and the method of commutation allow to compensate for both quadrupole and dipole components of the magnetic field. This, in turn, minimizes shaft beats effect and power supply noises effect on the accuracy of the results. During measurements, the shaft is rotated without stopping, and the data received from the gauge angle and digital integrators are processed "on the fly" strictly synchronous. The measurement procedure is performed in one and a half turn of the shaft and takes six seconds. The report describes mechanical design of the stand, principle of work, parameters of the equipment, and software. Results of measurements of the quadrupole lenses synchrotron source NSLS-II are given in conclusion. The results demonstrate possibilities of the stand.