LINAC2018 - List of Keywords (ISOL)

Paper	Title	Other Keywords	Page
MOPO059	Choke-Type Resonator for a Compact Storage Ring	cavity, storage-ring, ECR, higher-order-mode	126
	L. Ovchinnikova, V.I. Shvedunov SINP MSU, Moscow, Russia L. Ovchinnikova, V.I. Shvedunov LEA MSU, Moscow, Russia A. Ryabov IHEP, Moscow Region, Russia
	We present the results of calculations and measurements the electrodynamic characteristics of the operating and high order modes of a choke-type resonator, intended for a 35-50 MeV storage ring, which is part of the Thomson X-ray generator.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO059
About •	paper received ※ 09 September 2018 paper accepted ※ 21 September 2018 issue date ※ 18 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU1A05	Seamless Quarter Wave Resonators for HIE ISOLDE	cavity, niobium, linac, cryomodule	292
	W. Venturini Delsolaro, A. Miyazaki CERN, Geneva, Switzerland
	The HIE-ISOLDE post accelerator consists of 4 cryomodules with 5 niobium-coated Quarter Wave Reso-nators (QWR) each. The standard manufacturing tech-nique was to machine the inner and outer conductor sepa-rately, to shrink-fit the 2 pieces and to apply an electron beam welding at the interface. Due toμcracks, ob-served on some of the cavities around the welds, we took the decision to explore the possibility of a seamless de-sign. First cavities became available in late 2017 and were then cold-tested in the vertical cryostat. These seam-less coated quarter wave resonators have shown some of the highest Q-values of all HIE-ISOLDE cavities in the acceptance tests. Furthermore, we studied the cavity per-formance with different compensations of the earth mag-netic field and different temperature gradients upon cool down. These tests have demonstrated record-breaking RF surface fields for the Nb/Cu technology. This paper re-views the design and fabrication and reports on the cold tests results of seamless quarter wave resonators, and of possible future applications
	Slides TU1A05 [30.518 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TU1A05
About •	paper received ※ 11 September 2018 paper accepted ※ 08 October 2018 issue date ※ 18 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPO059

Choke-Type Resonator for a Compact Storage Ring

cavity, storage-ring, ECR, higher-order-mode

126

L. Ovchinnikova, V.I. Shvedunov
SINP MSU, Moscow, Russia
L. Ovchinnikova, V.I. Shvedunov
LEA MSU, Moscow, Russia
A. Ryabov
IHEP, Moscow Region, Russia

We present the results of calculations and measurements the electrodynamic characteristics of the operating and high order modes of a choke-type resonator, intended for a 35-50 MeV storage ring, which is part of the Thomson X-ray generator.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO059

About •

paper received ※ 09 September 2018 paper accepted ※ 21 September 2018 issue date ※ 18 January 2019

Export •

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

TU1A05

Seamless Quarter Wave Resonators for HIE ISOLDE

cavity, niobium, linac, cryomodule

292

W. Venturini Delsolaro, A. Miyazaki
CERN, Geneva, Switzerland

The HIE-ISOLDE post accelerator consists of 4 cryomodules with 5 niobium-coated Quarter Wave Reso-nators (QWR) each. The standard manufacturing tech-nique was to machine the inner and outer conductor sepa-rately, to shrink-fit the 2 pieces and to apply an electron beam welding at the interface. Due toμcracks, ob-served on some of the cavities around the welds, we took the decision to explore the possibility of a seamless de-sign. First cavities became available in late 2017 and were then cold-tested in the vertical cryostat. These seam-less coated quarter wave resonators have shown some of the highest Q-values of all HIE-ISOLDE cavities in the acceptance tests. Furthermore, we studied the cavity per-formance with different compensations of the earth mag-netic field and different temperature gradients upon cool down. These tests have demonstrated record-breaking RF surface fields for the Nb/Cu technology. This paper re-views the design and fabrication and reports on the cold tests results of seamless quarter wave resonators, and of possible future applications

Slides TU1A05 [30.518 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TU1A05

About •

paper received ※ 11 September 2018 paper accepted ※ 08 October 2018 issue date ※ 18 January 2019

Export •

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