RuPAC2016 - List of Authors (Paramonov, V.V.)

Paper	Title	Page
THCASH01	Effective RF Deflecting Structures for Bunch Rotation and Deflection	201
	V.V. Paramonov RAS/INR, Moscow, Russia
	Deflecting RF Structures find now applications for the bunch rotation with the purposes of diagnostic for the longitudinal distribution, emittance exchange and for the luminosity improvements in colliders. Report describes results of R&D program for development of deflectors with minimized level of aberrations in the distribution of deflecting field. Such structures, applied for bunch rotation along transverse axis, provide much smaller emittence growth, as compared to another options. In comparison with classical and widely used deflectors, based on disk loaded waveguide, developed structures have, depending on modification, in 2-6 times higher RF efficiency. Structures can operate both in Traveling Wave (TW) and in Standing Wave (SW) modes. To create long RF cavities for SW operation, compensated (bi-periodical) options are developed, combining field stability and high RF efficiency. The problem of stabilization for the plane of deflection is removed due to essentially 3D geometry. The main solutions for such structures development are described and achieved parameters are reported.
	Slides THCASH01 [6.084 MB]
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TUPSA004	Proposal of the Accelerating Structure for the First Cavity of the Main Part of INR Linac	216
	I.V. Rybakov, A. Feschenko, Y.Z. Kalinin, L.V. Kravchuk, V.N. Leontiev, A.N. Naboka, V.V. Paramonov, V.L. Serov RAS/INR, Moscow, Russia
	For the beam intensity and overall stability improvement of INR linac replacement of the first four section cavity of the main part is required. The present cavity is realized as the Disks and Washers (DAW) structure. The new cavity should not lose to the present one in electro dynamical parameters with minimal modifications in the rest linac systems. As the possible structures for the first cavity replacement both proven in exploitation structures and promising developments were considered. The analysis of electro dynamical parameters, coupled RF heating, mechanical processes and manufacturing analysis were performed for the considered structures. For further development the Cut Disk Structure (CDS) option is proposed as the structure with satisfying RF parameters and having the smallest transverse dimensions in comparison with analogues. For the production simplification with minimal losses in electro dynamical parameters an unification of the main geometrical parameters for the four sections cells was performed. The possibility of multipaction in the cavity is considered and an option for its damping is proposed. The manufacturing tolerances for the structure are estimated.
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TUPSA036	Manufacturing Tolerances Estimation for Proton Linac Cavities	291
	I.V. Rybakov, V.V. Paramonov, A.K. Skasyrskaya RAS/INR, Moscow, Russia
	The definition of manufacturing tolerances is one of the stages of accelerating structure construction. In case of proton linacs the value of accelerating field homogeneity is a critical parameter. It depends both on cells frequencies perturbations and the coupling coefficient perturbations. These values could be obtained using the numerical simulations of the characteristic electromagnetic oscillations in the cell. There is the method that allows the reduction of the simulations time and to avoid separate simulations for each geometrical parameter of the structure. This method was improved and extended for the pi/2-wave, pi-wave and travelling wave structures. Several examples of the method application, including the structure for the first cavity of the main part of INR linac, are presented.
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TUPSA069	Optimization of an RF Probe Vicinity for RF Gun Cavities	348
	V.V. Paramonov RAS/INR, Moscow, Russia
	To provide electron bunches with exceptionally high brightness, RF gun cavity should operate with the extreme electric and magnetic fields. The RF probe is required for the mostly reliable and precise measurements of the RF field phase and amplitude directly from the cavity. The implementation of an RF probe in the cavity design generates a set of coupled problems, which is analyzed and compared for different operating frequencies and different RF pulse length. Both general dependencies and particularities are considered. Some recommendations for practical choice of the RF probe are presented.
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Paper

Title

Page

Effective RF Deflecting Structures for Bunch Rotation and Deflection

201

V.V. Paramonov
RAS/INR, Moscow, Russia

Deflecting RF Structures find now applications for the bunch rotation with the purposes of diagnostic for the longitudinal distribution, emittance exchange and for the luminosity improvements in colliders. Report describes results of R&D program for development of deflectors with minimized level of aberrations in the distribution of deflecting field. Such structures, applied for bunch rotation along transverse axis, provide much smaller emittence growth, as compared to another options. In comparison with classical and widely used deflectors, based on disk loaded waveguide, developed structures have, depending on modification, in 2-6 times higher RF efficiency. Structures can operate both in Traveling Wave (TW) and in Standing Wave (SW) modes. To create long RF cavities for SW operation, compensated (bi-periodical) options are developed, combining field stability and high RF efficiency. The problem of stabilization for the plane of deflection is removed due to essentially 3D geometry. The main solutions for such structures development are described and achieved parameters are reported.

Slides THCASH01 [6.084 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSA004

Proposal of the Accelerating Structure for the First Cavity of the Main Part of INR Linac

216

I.V. Rybakov, A. Feschenko, Y.Z. Kalinin, L.V. Kravchuk, V.N. Leontiev, A.N. Naboka, V.V. Paramonov, V.L. Serov
RAS/INR, Moscow, Russia

For the beam intensity and overall stability improvement of INR linac replacement of the first four section cavity of the main part is required. The present cavity is realized as the Disks and Washers (DAW) structure. The new cavity should not lose to the present one in electro dynamical parameters with minimal modifications in the rest linac systems. As the possible structures for the first cavity replacement both proven in exploitation structures and promising developments were considered. The analysis of electro dynamical parameters, coupled RF heating, mechanical processes and manufacturing analysis were performed for the considered structures. For further development the Cut Disk Structure (CDS) option is proposed as the structure with satisfying RF parameters and having the smallest transverse dimensions in comparison with analogues. For the production simplification with minimal losses in electro dynamical parameters an unification of the main geometrical parameters for the four sections cells was performed. The possibility of multipaction in the cavity is considered and an option for its damping is proposed. The manufacturing tolerances for the structure are estimated.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSA036

Manufacturing Tolerances Estimation for Proton Linac Cavities

291

I.V. Rybakov, V.V. Paramonov, A.K. Skasyrskaya
RAS/INR, Moscow, Russia

The definition of manufacturing tolerances is one of the stages of accelerating structure construction. In case of proton linacs the value of accelerating field homogeneity is a critical parameter. It depends both on cells frequencies perturbations and the coupling coefficient perturbations. These values could be obtained using the numerical simulations of the characteristic electromagnetic oscillations in the cell. There is the method that allows the reduction of the simulations time and to avoid separate simulations for each geometrical parameter of the structure. This method was improved and extended for the pi/2-wave, pi-wave and travelling wave structures. Several examples of the method application, including the structure for the first cavity of the main part of INR linac, are presented.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSA069

Optimization of an RF Probe Vicinity for RF Gun Cavities

348

V.V. Paramonov
RAS/INR, Moscow, Russia

To provide electron bunches with exceptionally high brightness, RF gun cavity should operate with the extreme electric and magnetic fields. The RF probe is required for the mostly reliable and precise measurements of the RF field phase and amplitude directly from the cavity. The implementation of an RF probe in the cavity design generates a set of coupled problems, which is analyzed and compared for different operating frequencies and different RF pulse length. Both general dependencies and particularities are considered. Some recommendations for practical choice of the RF probe are presented.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)