LINAC2016 - List of Authors (Grudiev, A.)

Paper	Title	Page
MOPLR004	Development of an High Gradient, S-band, Accelerating Structure for the FERMI Linac	136
	C. Serpico, I. Cudin Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy A. Grudiev CERN, Geneva, Switzerland
	The FERMI seeded free-electron laser (FEL), located at the Elettra laboratory in Trieste, is driven by a 200 meter long, S-band linac routinely operated at nearly 1.5 GeV and 10 Hz repetition rate [1]. The high energy part of the Linac is equipped with seven, 6 meter long Backward Traveling Wave (BTW) structures: those structures have small iris radius and a nose cone geometry which allows for high gradient operation [2]. Nonetheless a possible development of high-gradient, S-band accelerating struc-tures for the replacement of the actual BTW structures is under consideration. This paper investigates a possible solution for RF couplers that could be suitable for linac driven FEL where reduced wakefields effects, high oper-ating gradient and very high reliability are required.
	Poster MOPLR004 [0.947 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR004
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPLR048	Fabrication and Testing of a Novel S-Band Backward Travelling Wave Accelerating Structure for Proton Therapy Linacs	237
SPWR023	use link to see paper's listing under its alternate paper code
	S. Benedetti, T. Argyropoulos, C. Blanch Gutiérrez, N. Catalán Lasheras, A. Degiovanni, D. Esperante Pereira, M. Garlaschè, J. Giner Navarro, A. Grudiev, G. McMonagle, A. Solodko, M.A. Timmins, R. Wegner, B.J. Woolley, W. Wuensch CERN, Geneva, Switzerland D. Esperante Pereira IFIC, Valencia, Spain
	Compact and more affordable, facilities for proton therapy are now entering the market of commercial medical accelerators. At CERN, a joint collaboration between CLIC and TERA Foundation led to the design, fabrication and testing of a high gradient accelerating structure prototype, capable of halving the length of state-of-art light ion therapy linacs. This paper focuses on the mechanical design, fabrication and testing of a first prototype. CLIC standardized bead-pull measurement setup was used, leading to a quick and successful tuning of the prototype. The high power tests will soon start in order to prove that the structure can withstand a very high accelerating gradient while suffering no more than 10^-6 breakdown per pulse per meter (bpp/m), resulting in less than one breakdown per treatment session.
	Poster MOPLR048 [2.804 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR048
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPLR049	Design of a 750 MHz IH Structure for Medical Applications	240
SPWR022	use link to see paper's listing under its alternate paper code
	S. Benedetti, A. Grudiev, A. Latina CERN, Geneva, Switzerland
	Low velocity particles are critical in every hadron accelerator chain. While RFQs nicely cover the first MeV/u range, providing both acceleration and bunching, energies higher than few MeV/u require different structures, depending on the specific application. In the framework of the TULIP project [1], a 750 MHz IH structure was designed, in order to cover the 5-10 MeV/u range. The relatively high operating frequency and small bore aperture radius led the choice towards TE mode structures over more classic DTLs. Hereafter, the RF regular cell and end cell optimization is presented. An innovative solution to compensate dipole kicks is discussed, together with the beam dynamics and the matching with the 5 MeV 750 MHz CERN RFQ [2]. This structure was specifically designed for medical applications with a duty cycle of about 1 ', but can easily adapted to duty cycles up to 5 %, typical of PET isotopes production in hospitals.
	Poster MOPLR049 [3.212 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR049
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPLR066	ProBE: Proton Boosting Extension for Imaging and Therapy	283
	S. Pitman, R. Apsimon, G. Burt Cockcroft Institute, Lancaster University, Lancaster, United Kingdom A.F. Green, H.L. Owen UMAN, Manchester, United Kingdom A. Grudiev, A. Solodko, W. Wuensch CERN, Geneva, Switzerland
	Funding: This work was funded by STFC and IPS Proton beam therapy has been shown to be a promising alternative to traditional radiotherapy, especially for paedi- atric malignancies and radio-resistant tumours. Allowing a highly precise tumour irradiation, it is currently limited by range verification. Several imaging modalities can be utilised for treatment planning, but typically X-ray CT is used. CT scans require conversion from Hounsfield units to estimate the proton stopping power (PSP) of the tissue be- ing treated, and this produces inaccuracy. Proton CT (pCT) measures PSP and is thought to allow an improvement of the treatment accuracy. The Christie Hospital will use a 250 MeV cyclotron for proton therapy, in this paper a pulsed linac upgrade is proposed, to provide 350 MeV protons for pCT within the facility. Space contraints require a compact, high gradient (HG) solution that is reliable and affordable.
	Poster MOPLR066 [0.610 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR066
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TH1A06	High-Frequency Compact RFQs for Medical and Industrial Applications	704
	M. Vretenar, V.A. Dimov, M. Garlaschè, A. Grudiev, B. Koubek, A.M. Lombardi, S.J. Mathot, D. Mazur, E. Montesinos, M.A. Timmins CERN, Geneva, Switzerland
	CERN has completed the construction of a 750 MHz RFQ reaching 5 MeV proton energy in a length of only 2 meters, to be used as injector for a compact proton therapy linac. Beyond proton therapy, this compact and lightweight design can be used for several applications, ranging from the production of radioisotopes in hospitals to ion beam analysis of industrial components or of artworks. The ex-perience with the construction of the first unit will be pre-sented together with the design and plans for other appli-cations.
	Slides TH1A06 [9.369 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TH1A06
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THOP09	Tuning of the CERN 750 MHz RFQ for Medical Applications	763
THPLR055	use link to see paper's listing under its alternate paper code
	B. Koubek, Y. Cuvet, A. Grudiev, C. Rossi, M.A. Timmins CERN, Geneva, Switzerland
	CERN has built a compact 750 MHz RFQ as an injector for a hadron therapy linac. This RFQ was designed to accelerate protons to an energy of 5 MeV within only 2 m length. It is divided into four segments and equipped with 32 tuners in total. The RFQ length corresponds to 5λ which is considered to be close to the limit for simple field adjustment using tuners. Nevertheless the high frequency results in a sensitive structure and requires careful tuning by means of the alignment of the pumping ports and fixed tuners. This paper gives an overview of the tuning procedure and bead pull measurements of the RFQ.
	Slides THOP09 [16.367 MB]
	Poster THOP09 [23.832 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THOP09
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THPLR003	Fabrication and High-Gradient Testing of an Accelerating Structure Made From Milled Halves	845
	W. Wuensch, T. Argyropoulos, N. Catalán Lasheras, D. Esperante Pereira, J. Giner Navarro, A. Grudiev, G. McMonagle, I. Syratchev, B.J. Woolley, H. Zha CERN, Geneva, Switzerland T. Argyropoulos, D. Esperante Pereira, J. Giner Navarro IFIC, Valencia, Spain G.B. Bowden, V.A. Dolgashev, A.A. Haase SLAC, Menlo Park, California, USA P.J. Giansiracusa, T.G. Lucas, M. Volpi The University of Melbourne, Melbourne, Victoria, Australia R. Rajamaki Aalto University, School of Science and Technology, Aalto, Finland X.F.D. Stragier TUE, Eindhoven, The Netherlands
	Accelerating structures made from parts which follow symmetry planes offer many potential advantages over traditional disk-based structures: more options for joining (from bonding to welding), following this more options for material state (heat treated or not) and potentially lower cost since structures can be made from fewer parts. An X-band structure made from milled halves, and with a standard benchmarked CLIC test structure design has been fabricated and high-gradient tested in the range of 100 MV/m.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR003
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Development of an High Gradient, S-band, Accelerating Structure for the FERMI Linac

136

C. Serpico, I. Cudin
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
A. Grudiev
CERN, Geneva, Switzerland

The FERMI seeded free-electron laser (FEL), located at the Elettra laboratory in Trieste, is driven by a 200 meter long, S-band linac routinely operated at nearly 1.5 GeV and 10 Hz repetition rate [1]. The high energy part of the Linac is equipped with seven, 6 meter long Backward Traveling Wave (BTW) structures: those structures have small iris radius and a nose cone geometry which allows for high gradient operation [2]. Nonetheless a possible development of high-gradient, S-band accelerating struc-tures for the replacement of the actual BTW structures is under consideration. This paper investigates a possible solution for RF couplers that could be suitable for linac driven FEL where reduced wakefields effects, high oper-ating gradient and very high reliability are required.

Poster MOPLR004 [0.947 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR004

Export •

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

MOPLR048

Fabrication and Testing of a Novel S-Band Backward Travelling Wave Accelerating Structure for Proton Therapy Linacs

237

SPWR023

use link to see paper's listing under its alternate paper code

S. Benedetti, T. Argyropoulos, C. Blanch Gutiérrez, N. Catalán Lasheras, A. Degiovanni, D. Esperante Pereira, M. Garlaschè, J. Giner Navarro, A. Grudiev, G. McMonagle, A. Solodko, M.A. Timmins, R. Wegner, B.J. Woolley, W. Wuensch
CERN, Geneva, Switzerland
D. Esperante Pereira
IFIC, Valencia, Spain

Compact and more affordable, facilities for proton therapy are now entering the market of commercial medical accelerators. At CERN, a joint collaboration between CLIC and TERA Foundation led to the design, fabrication and testing of a high gradient accelerating structure prototype, capable of halving the length of state-of-art light ion therapy linacs. This paper focuses on the mechanical design, fabrication and testing of a first prototype. CLIC standardized bead-pull measurement setup was used, leading to a quick and successful tuning of the prototype. The high power tests will soon start in order to prove that the structure can withstand a very high accelerating gradient while suffering no more than 10^-6 breakdown per pulse per meter (bpp/m), resulting in less than one breakdown per treatment session.

Poster MOPLR048 [2.804 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR048

Export •

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

MOPLR049

Design of a 750 MHz IH Structure for Medical Applications

240

SPWR022

use link to see paper's listing under its alternate paper code

S. Benedetti, A. Grudiev, A. Latina
CERN, Geneva, Switzerland

Low velocity particles are critical in every hadron accelerator chain. While RFQs nicely cover the first MeV/u range, providing both acceleration and bunching, energies higher than few MeV/u require different structures, depending on the specific application. In the framework of the TULIP project [1], a 750 MHz IH structure was designed, in order to cover the 5-10 MeV/u range. The relatively high operating frequency and small bore aperture radius led the choice towards TE mode structures over more classic DTLs. Hereafter, the RF regular cell and end cell optimization is presented. An innovative solution to compensate dipole kicks is discussed, together with the beam dynamics and the matching with the 5 MeV 750 MHz CERN RFQ [2]. This structure was specifically designed for medical applications with a duty cycle of about 1 ', but can easily adapted to duty cycles up to 5 %, typical of PET isotopes production in hospitals.

Poster MOPLR049 [3.212 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR049

Export •

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

MOPLR066

ProBE: Proton Boosting Extension for Imaging and Therapy

283

S. Pitman, R. Apsimon, G. Burt
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
A.F. Green, H.L. Owen
UMAN, Manchester, United Kingdom
A. Grudiev, A. Solodko, W. Wuensch
CERN, Geneva, Switzerland

Funding: This work was funded by STFC and IPS
Proton beam therapy has been shown to be a promising alternative to traditional radiotherapy, especially for paedi- atric malignancies and radio-resistant tumours. Allowing a highly precise tumour irradiation, it is currently limited by range verification. Several imaging modalities can be utilised for treatment planning, but typically X-ray CT is used. CT scans require conversion from Hounsfield units to estimate the proton stopping power (PSP) of the tissue be- ing treated, and this produces inaccuracy. Proton CT (pCT) measures PSP and is thought to allow an improvement of the treatment accuracy. The Christie Hospital will use a 250 MeV cyclotron for proton therapy, in this paper a pulsed linac upgrade is proposed, to provide 350 MeV protons for pCT within the facility. Space contraints require a compact, high gradient (HG) solution that is reliable and affordable.

Poster MOPLR066 [0.610 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR066

Export •

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

TH1A06

High-Frequency Compact RFQs for Medical and Industrial Applications

704

M. Vretenar, V.A. Dimov, M. Garlaschè, A. Grudiev, B. Koubek, A.M. Lombardi, S.J. Mathot, D. Mazur, E. Montesinos, M.A. Timmins
CERN, Geneva, Switzerland

CERN has completed the construction of a 750 MHz RFQ reaching 5 MeV proton energy in a length of only 2 meters, to be used as injector for a compact proton therapy linac. Beyond proton therapy, this compact and lightweight design can be used for several applications, ranging from the production of radioisotopes in hospitals to ion beam analysis of industrial components or of artworks. The ex-perience with the construction of the first unit will be pre-sented together with the design and plans for other appli-cations.

Slides TH1A06 [9.369 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TH1A06

Export •

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

THOP09

Tuning of the CERN 750 MHz RFQ for Medical Applications

763

THPLR055

use link to see paper's listing under its alternate paper code

B. Koubek, Y. Cuvet, A. Grudiev, C. Rossi, M.A. Timmins
CERN, Geneva, Switzerland

CERN has built a compact 750 MHz RFQ as an injector for a hadron therapy linac. This RFQ was designed to accelerate protons to an energy of 5 MeV within only 2 m length. It is divided into four segments and equipped with 32 tuners in total. The RFQ length corresponds to 5λ which is considered to be close to the limit for simple field adjustment using tuners. Nevertheless the high frequency results in a sensitive structure and requires careful tuning by means of the alignment of the pumping ports and fixed tuners. This paper gives an overview of the tuning procedure and bead pull measurements of the RFQ.

Slides THOP09 [16.367 MB]

Poster THOP09 [23.832 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THOP09

Export •

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

THPLR003

Fabrication and High-Gradient Testing of an Accelerating Structure Made From Milled Halves

845

W. Wuensch, T. Argyropoulos, N. Catalán Lasheras, D. Esperante Pereira, J. Giner Navarro, A. Grudiev, G. McMonagle, I. Syratchev, B.J. Woolley, H. Zha
CERN, Geneva, Switzerland
T. Argyropoulos, D. Esperante Pereira, J. Giner Navarro
IFIC, Valencia, Spain
G.B. Bowden, V.A. Dolgashev, A.A. Haase
SLAC, Menlo Park, California, USA
P.J. Giansiracusa, T.G. Lucas, M. Volpi
The University of Melbourne, Melbourne, Victoria, Australia
R. Rajamaki
Aalto University, School of Science and Technology, Aalto, Finland
X.F.D. Stragier
TUE, Eindhoven, The Netherlands

Accelerating structures made from parts which follow symmetry planes offer many potential advantages over traditional disk-based structures: more options for joining (from bonding to welding), following this more options for material state (heat treated or not) and potentially lower cost since structures can be made from fewer parts. An X-band structure made from milled halves, and with a standard benchmarked CLIC test structure design has been fabricated and high-gradient tested in the range of 100 MV/m.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR003

Export •

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