NAPAC2016 - List of Keywords (rfq)

Paper	Title	Other Keywords	Page
MOA4CO04	Compact Carbon Ion Linac	ion, linac, DTL, accelerating-gradient	61
	P.N. Ostroumov, A. Goel, B. Mustapha, A. Nassiri, A.S. Plastun ANL, Argonne, USA L. Faillace, S.V. Kutsaev, E.A. Savin RadiaBeam, Marina del Rey, California, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of High Energy Physics, under Accelerator Stewardship Grant, Proposal No. 0000219678. Argonne National Laboratory is developing an Advanced Compact Carbon Ion Linac (ACCIL) in collaboration with RadiaBeam Technologies. The 45-meter long linac is designed to deliver up to 10⁹ carbon ions per second with variable energy from 45 MeV/u to 450 MeV/u. To optimize the linac design in this energy range both backward traveling wave and coupled cell standing wave S-band structures were analyzed. To achieve the required accelerating gradients our design uses accelerating structures excited with short RF pulses (~500 ns flattop). The front-end accelerating structures such as the RFQ, DTL and Coupled Cell DTL are designed to operate at lower frequencies to maintain high shunt impedance. In parallel with our design effort ANL's RF test facility has been upgraded and used for the testing of an S-band high-gradient structure designed and built by Radiabeam for high pulsed RF power operation. The 5-cell S-band structure demonstrated 52 MV/m acceleration field at 2 μs 30 Hz RF pulses. A detailed physics design, including a comparison of different accelerating structures and end-to-end beam dynamics simulations of the ACCIL will be presented.
	Slides MOA4CO04 [3.531 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOA4CO04
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MOB4CO04	Design of the Room-Temperature Front-End for a Multi-Ion Linac Injector	ion, linac, light-ion, heavy-ion	73
	A.S. Plastun, Z.A. Conway, B. Mustapha, P.N. Ostroumov ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S.DOE, Office of Science, Office of Nuclear Physics, contract DE-AC02-06CH11357. This research used resources of ANL's ATLAS, which is a DOE Office of Science User Facility. A pulsed multi ion injector linac is being developed by ANL for Jefferson Laboratory's Electron Ion Collider (JLEIC). The linac is designed to deliver both polarized and non polarized ion beams to the booster synchrotron at energies ranging from 135 MeV for hydrogen to 43 MeV/u for lead ions. The linac is composed of a 5 MeV/u room temperature section and a superconducting section with variable velocity profile for different ion species. This paper presents the results of the RF design of the main components and the beam dynamics simulations of the linac front-end with the goal of achieving design specifications cost-effectively.
	Slides MOB4CO04 [2.545 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOB4CO04
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MOPOB17	Resonant Frequency Control for the PIP-II Injector Test RFQ: Control Framework and Initial Results	ion, controls, framework, operation	109
	A.L. Edelen, S. Biedron, S.V. Milton CSU, Fort Collins, Colorado, USA D.L. Bowring, B.E. Chase, J.P. Edelen, D.J. Nicklaus, J. Steimel Fermilab, Batavia, Illinois, USA
	Funding: Work supported by Fermilab Research Alliance, LLC under Contract No. DE-AC02-07CH11359. For the PIP-II Injector Test (PI-Test) at Fermilab, a four-vane radio frequency quadrupole (RFQ) is designed to accelerate a 30-keV, 1-mA to 10-mA H' beam to 2.1 MeV under both pulsed and continuous wave (CW) RF operation. The available headroom of the RF amplifiers limit the maximum allowable detuning to 3 kHz, and the detuning is controlled entirely via thermal regulation. Fine control over the detuning, minimal manual intervention, and fast trip recovery is desired. In addition, having active control over both the walls and vanes provides a wider tuning range. For this, we intend to use model predictive control (MPC). To facilitate these objectives, we developed a dedicated control framework that handles higher-level system decisions as well as executes control calculations. It is written in Python in a modular fashion for easy adjustments, readability, and portability. Here we describe the framework and present the first control results for the PI-Test RFQ under pulsed and CW operation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOPOB17
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TUA1IO02	Status Report on the SPIRAL2 Facility at GANIL	ion, linac, proton, experiment	240
	E. Petit GANIL, Caen, France
	The GANIL SPIRAL2 project is based on the construction of a superconducting ion CW LINAC with two experimental areas named S3 ('Super Separator Spectrometer') and NFS ('Neutron For Science'). This status will report the construction of the facility and the first beam commissioning results. The perspectives of the SPIRAL2 project, with the future construction of the low energy RIB experimental hall called DESIR and with the construction of a new injector with q/A>1/6 or 1/7, will also be presented.
	Slides TUA1IO02 [22.004 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1IO02
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TUA1IO03	Technological Challenges in the Path to 3.0 MW at the SNS Accelerator	ion, operation, target, neutron	246
	K.W. Jones ORNL, Oak Ridge, Tennessee, USA
	This talk discusses the design and anticipated challenges associated with upgrading the SNS beam power from the original 1.4 MW baseline design to the upgrade goal of 3 MW.
	Slides TUA1IO03 [22.843 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1IO03
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TUA1CO05	Conceptual Design of a Ring for Pulse Structure Manipulation of Heavy Ion Beams at the MSU NSCL	ion, extraction, acceleration, linac	255
	A.N. Pham, R. Ready, C.Y. Wong NSCL, East Lansing, Michigan, USA S.M. Lund FRIB, East Lansing, USA M.J. Syphers Northern Illinois University, DeKalb, Illinois, USA
	Funding: Research supported by Michigan State University, MSU NSCL, ReA Project, and NSF Award PHY-1415462. The Reaccelerator (ReA) Facility at the National Superconducting Cyclotron Laboratory (NSCL) located at Michigan State University (MSU) offers the low-energy nuclear science community unique capabilities to explore wider ranges of nuclear reactions and the structure of exotic nuclei. Future sensitive time-of-flight experiments on ReA will require the widening of pulse separation for improved temporal resolution in single bunch detection while minimizing loss of rare isotopes and cleaning of beam decay products that might pollute measurements. In this proceedings, we present a preliminary design of a heavy ion ring that will address the task of bunch compression, bunch separation enhancement, satellite bunches elimination, cleaning of decay products, beam loss mitigation, and improvement of beam transmission.
	Slides TUA1CO05 [4.991 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1CO05
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TUPOA18	Low Level RF Control for the PIP-II Injector Test RFQ	ion, controls, LLRF, cavity	323
	J.P. Edelen, B.E. Chase, E. Cullerton, J. Einstein, P. Varghese Fermilab, Batavia, Illinois, USA
	The PIP-II injector test radio frequency quadrupole (RFQ) arrived at Fermilab in the fall of 2015. The RFQ is a 162.5MHz H⁻ accelerator with a nominal drive power of 100kW, which produces a bunched H⁻ beam at 2.1MeV. In this paper we discuss commissioning, operational performance, and improvements to the low level RF (LLRF) control system for the RFQ. We begin by describing the general system configuration and initial simulation results. We will then highlight temperature related issues in the high power RF system, which necessitate active control over the phase balance of the two amplifiers. Finally we demonstrate performance of the RF feedback and feed-forward compensation needed to meet specification during a 20-microsecond beam pulse.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOA18
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TUPOB66	Procedure for the Alignment of the Beam in the Electrical Axes of the Pi-Test RFQ	ion, alignment, solenoid, emittance	639
	J.-P. Carneiro, L.R. Prost, J. Steimel Fermilab, Batavia, Illinois, USA
	The PI-Test Radio-Frequency Quadrupole (RFQ) has been in operation with beam at Fermilab since March 2016. The RFQ accelerates H⁻ beam from 30 keV to 2.1 MeV currently with 20 mus pulses and a maximum current of 10 mA. Once fully conditioned, the RFQ is expected to enable CW operation. Simulations with the beam dynamics code TRACK predict that a misalignment of the beam at the RFQ entrance can possibly deteriorate the transverse and longitudinal emittance at the RFQ exit without necessarily impacting the beam transmission. This paper discusses the procedure developed at Fermilab to align the beam in the electrical axes of the RFQ. Experimental results are shown together with predictions from TRACK.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB66
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WEPOA04	Design of Front End for RF Synchronized Short Pulse Laser Ion Source	ion, laser, ion-source, plasma	693
	Y. Fuwa, Y. Iwashita Kyoto ICR, Uji, Kyoto, Japan
	A short pulse laser ion source is under development. In this ion source, ions are produced by femto-second laser in RF electric field and produced ion bunch with a few nanosecond pulse length. This feature can eliminate bunching section of RFQ and beam can be accelerated from the first cell of RFQ. In this presentation, results of design study for the RFQ without bunching section will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA04
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPOA15	Installation Progress at the PIP-II Injector Test at Fermilab	ion, controls, MMI, linac	722
	C.M. Baffes, M.L. Alvarez, R. Andrews, A.Z. Chen, J. Czajkowski, P. Derwent, J.P. Edelen, B.M. Hanna, B.D. Hartsell, K.R. Kendziora, D.V. Mitchell, L.R. Prost, V.E. Scarpine, A.V. Shemyakin, J. Steimel, T.J. Zuchnik Fermilab, Batavia, Illinois, USA A.L. Edelen CSU, Fort Collins, Colorado, USA
	Funding: Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy A CW-compatible, pulsed H⁻ superconducting linac 'PIP-II' is being planned to upgrade Fermilab's injection complex. To validate the concept of the front-end of such a machine, a test accelerator (The PIP-II Injector Test, formerly known as "PXIE") is under construction. The warm part of this accelerator comprises a 10 mA DC 30 keV H⁻ ion source, a 2m-long LEBT, a 2.1 MeV CW RFQ, and a 10-m long MEBT that is capable of creating a large variety of bunch structures. The paper will report on the installation of the RFQ and the first sections of the MEBT and related mechanical design considerations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA15
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WEPOA52	Modeling and Simulation of RFQs for Analysis of Fields and Frequency Deviations with Respect to Internal Dimensional Errors	ion, simulation, resonance, operation	810
	Y.W. Kang, S.W. Lee ORNL, Oak Ridge, Tennessee, USA
	Funding: This work was supported by SNS through UTBattelle, LLC, under contract DEAC0500OR22725 for the U.S.DOE. Performance of radio frequency quadrupole (RFQ) is sensitive to the errors in internal dimensions which shift resonance frequency and distort field distribution on the beam axis along the structure. The SNS RFQ has been retuned three times to compensate the deviations in frequency and field flatness with suspected dimensional changes since the start of the project for continuous operation with H⁻ ion beams. SNS now has a new RFQ as a spare that is installed in beam test facility (BTF), a low energy test accelerator. In order to understand and predict the performance deviation, full 3D modeling and simulation were performed for the SNS RFQs. Field and frequency errors from hypothetical transverse vane perturbations, and vane erosion (and metal deposition such as Cesium introduced by the ion source operation) at the low energy ends are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA52
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WEPOA56	Design of RFQ Linac to Accelerate High Current Lithium Ion Beam from Laser Ion Source for Compact Neutron Source	ion, neutron, linac, ion-source	820
	S. Ikeda, T. Kanesue, M. Okamura BNL, Upton, Long Island, New York, USA
	Accelerator-driven compact neutron sources have been developed to conduct nondestructive inspection more conveniently and/or on the spot with lower cost than other neutron sources, such as spallation sources and nuclear reactors. In typical compact source, proton or deuteron are injected into Li or Be. To develop a higher flax source than conventional ones, we propose a source with 7Li beam generated by laser ion source using direct injection scheme (DPIS) into RFQ linac. Because of the higher velocity of center of mass than that in the case of proton beam injection, generated neutrons are more collimated. In addition, laser ion source with DPIS is expected to accelerate mA class fully ionized 7Li beam stably with simple setup, while it is difficult for conventional ion sources. The high collimation and high current are expected to lead to higher neutron flax. In this presentation, we present a design of RFQ linac optimized to accelerate such a high current beam with shorter distance.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA56
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FRB1IO02	LIGHT: A Linear Accelerator for Proton Therapy	ion, linac, proton, MMI	1282
	D. Ungaro, A. Degiovanni, P. Stabile ADAM SA, Geneva, Switzerland
	ADAM, Application of Detectors and Accelerators to Medicine is a Swiss Company based in Geneva Switzerland established on 20th December 2007. ADAM was founded to promote scientific know-how and innovations in medical technology for cancer treatment. In 2007 a first partnership agreement was signed with CERN and in 2011 ADAM has been officially recognized as CERN spin-off. After the first research results other partnership agreements were signed between ADAM and CERN with the main goal of establishing a framework within which the two parties can collaborate to develop novel technologies for detectors and accelerators. Currently ADAM research activity is mainly focused on the construction and testing of its first linear accelerator for medical application: LIGHT (Linac for Image-Guided Hadron Therapy). LIGHT is an innovative linear accelerator designed to revolutionise hadron therapy facilities by simplifying the infrastructure and make them profitable from an industrial point of view while providing a better quality beam. The current design allow LIGHT to accelerate proton beam up to 230MeV with several advantages comparing to the current solutions present in the market.
	Slides FRB1IO02 [7.447 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-FRB1IO02
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Paper

Title

Other Keywords

Page

MOA4CO04

Compact Carbon Ion Linac

ion, linac, DTL, accelerating-gradient

61

P.N. Ostroumov, A. Goel, B. Mustapha, A. Nassiri, A.S. Plastun
ANL, Argonne, USA
L. Faillace, S.V. Kutsaev, E.A. Savin
RadiaBeam, Marina del Rey, California, USA

Funding: This work was supported by the U.S. Department of Energy, Office of High Energy Physics, under Accelerator Stewardship Grant, Proposal No. 0000219678.
Argonne National Laboratory is developing an Advanced Compact Carbon Ion Linac (ACCIL) in collaboration with RadiaBeam Technologies. The 45-meter long linac is designed to deliver up to 10⁹ carbon ions per second with variable energy from 45 MeV/u to 450 MeV/u. To optimize the linac design in this energy range both backward traveling wave and coupled cell standing wave S-band structures were analyzed. To achieve the required accelerating gradients our design uses accelerating structures excited with short RF pulses (~500 ns flattop). The front-end accelerating structures such as the RFQ, DTL and Coupled Cell DTL are designed to operate at lower frequencies to maintain high shunt impedance. In parallel with our design effort ANL's RF test facility has been upgraded and used for the testing of an S-band high-gradient structure designed and built by Radiabeam for high pulsed RF power operation. The 5-cell S-band structure demonstrated 52 MV/m acceleration field at 2 μs 30 Hz RF pulses. A detailed physics design, including a comparison of different accelerating structures and end-to-end beam dynamics simulations of the ACCIL will be presented.

Slides MOA4CO04 [3.531 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOA4CO04

Export •

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

MOB4CO04

Design of the Room-Temperature Front-End for a Multi-Ion Linac Injector

ion, linac, light-ion, heavy-ion

73

A.S. Plastun, Z.A. Conway, B. Mustapha, P.N. Ostroumov
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S.DOE, Office of Science, Office of Nuclear Physics, contract DE-AC02-06CH11357. This research used resources of ANL's ATLAS, which is a DOE Office of Science User Facility.
A pulsed multi ion injector linac is being developed by ANL for Jefferson Laboratory's Electron Ion Collider (JLEIC). The linac is designed to deliver both polarized and non polarized ion beams to the booster synchrotron at energies ranging from 135 MeV for hydrogen to 43 MeV/u for lead ions. The linac is composed of a 5 MeV/u room temperature section and a superconducting section with variable velocity profile for different ion species. This paper presents the results of the RF design of the main components and the beam dynamics simulations of the linac front-end with the goal of achieving design specifications cost-effectively.

Slides MOB4CO04 [2.545 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOB4CO04

Export •

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

MOPOB17

Resonant Frequency Control for the PIP-II Injector Test RFQ: Control Framework and Initial Results

ion, controls, framework, operation

109

A.L. Edelen, S. Biedron, S.V. Milton
CSU, Fort Collins, Colorado, USA
D.L. Bowring, B.E. Chase, J.P. Edelen, D.J. Nicklaus, J. Steimel
Fermilab, Batavia, Illinois, USA

Funding: Work supported by Fermilab Research Alliance, LLC under Contract No. DE-AC02-07CH11359.
For the PIP-II Injector Test (PI-Test) at Fermilab, a four-vane radio frequency quadrupole (RFQ) is designed to accelerate a 30-keV, 1-mA to 10-mA H' beam to 2.1 MeV under both pulsed and continuous wave (CW) RF operation. The available headroom of the RF amplifiers limit the maximum allowable detuning to 3 kHz, and the detuning is controlled entirely via thermal regulation. Fine control over the detuning, minimal manual intervention, and fast trip recovery is desired. In addition, having active control over both the walls and vanes provides a wider tuning range. For this, we intend to use model predictive control (MPC). To facilitate these objectives, we developed a dedicated control framework that handles higher-level system decisions as well as executes control calculations. It is written in Python in a modular fashion for easy adjustments, readability, and portability. Here we describe the framework and present the first control results for the PI-Test RFQ under pulsed and CW operation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-MOPOB17

Export •

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

TUA1IO02

Status Report on the SPIRAL2 Facility at GANIL

ion, linac, proton, experiment

240

E. Petit
GANIL, Caen, France

The GANIL SPIRAL2 project is based on the construction of a superconducting ion CW LINAC with two experimental areas named S3 ('Super Separator Spectrometer') and NFS ('Neutron For Science'). This status will report the construction of the facility and the first beam commissioning results. The perspectives of the SPIRAL2 project, with the future construction of the low energy RIB experimental hall called DESIR and with the construction of a new injector with q/A>1/6 or 1/7, will also be presented.

Slides TUA1IO02 [22.004 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1IO02

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

TUA1IO03

Technological Challenges in the Path to 3.0 MW at the SNS Accelerator

ion, operation, target, neutron

246

K.W. Jones
ORNL, Oak Ridge, Tennessee, USA

This talk discusses the design and anticipated challenges associated with upgrading the SNS beam power from the original 1.4 MW baseline design to the upgrade goal of 3 MW.

Slides TUA1IO03 [22.843 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1IO03

Export •

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

TUA1CO05

Conceptual Design of a Ring for Pulse Structure Manipulation of Heavy Ion Beams at the MSU NSCL

ion, extraction, acceleration, linac

255

A.N. Pham, R. Ready, C.Y. Wong
NSCL, East Lansing, Michigan, USA
S.M. Lund
FRIB, East Lansing, USA
M.J. Syphers
Northern Illinois University, DeKalb, Illinois, USA

Funding: Research supported by Michigan State University, MSU NSCL, ReA Project, and NSF Award PHY-1415462.
The Reaccelerator (ReA) Facility at the National Superconducting Cyclotron Laboratory (NSCL) located at Michigan State University (MSU) offers the low-energy nuclear science community unique capabilities to explore wider ranges of nuclear reactions and the structure of exotic nuclei. Future sensitive time-of-flight experiments on ReA will require the widening of pulse separation for improved temporal resolution in single bunch detection while minimizing loss of rare isotopes and cleaning of beam decay products that might pollute measurements. In this proceedings, we present a preliminary design of a heavy ion ring that will address the task of bunch compression, bunch separation enhancement, satellite bunches elimination, cleaning of decay products, beam loss mitigation, and improvement of beam transmission.

Slides TUA1CO05 [4.991 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA1CO05

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TUPOA18

Low Level RF Control for the PIP-II Injector Test RFQ

ion, controls, LLRF, cavity

323

J.P. Edelen, B.E. Chase, E. Cullerton, J. Einstein, P. Varghese
Fermilab, Batavia, Illinois, USA

The PIP-II injector test radio frequency quadrupole (RFQ) arrived at Fermilab in the fall of 2015. The RFQ is a 162.5MHz H⁻ accelerator with a nominal drive power of 100kW, which produces a bunched H⁻ beam at 2.1MeV. In this paper we discuss commissioning, operational performance, and improvements to the low level RF (LLRF) control system for the RFQ. We begin by describing the general system configuration and initial simulation results. We will then highlight temperature related issues in the high power RF system, which necessitate active control over the phase balance of the two amplifiers. Finally we demonstrate performance of the RF feedback and feed-forward compensation needed to meet specification during a 20-microsecond beam pulse.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOA18

Export •

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

TUPOB66

Procedure for the Alignment of the Beam in the Electrical Axes of the Pi-Test RFQ

ion, alignment, solenoid, emittance

639

J.-P. Carneiro, L.R. Prost, J. Steimel
Fermilab, Batavia, Illinois, USA

The PI-Test Radio-Frequency Quadrupole (RFQ) has been in operation with beam at Fermilab since March 2016. The RFQ accelerates H⁻ beam from 30 keV to 2.1 MeV currently with 20 mus pulses and a maximum current of 10 mA. Once fully conditioned, the RFQ is expected to enable CW operation. Simulations with the beam dynamics code TRACK predict that a misalignment of the beam at the RFQ entrance can possibly deteriorate the transverse and longitudinal emittance at the RFQ exit without necessarily impacting the beam transmission. This paper discusses the procedure developed at Fermilab to align the beam in the electrical axes of the RFQ. Experimental results are shown together with predictions from TRACK.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUPOB66

Export •

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

WEPOA04

Design of Front End for RF Synchronized Short Pulse Laser Ion Source

ion, laser, ion-source, plasma

693

Y. Fuwa, Y. Iwashita
Kyoto ICR, Uji, Kyoto, Japan

A short pulse laser ion source is under development. In this ion source, ions are produced by femto-second laser in RF electric field and produced ion bunch with a few nanosecond pulse length. This feature can eliminate bunching section of RFQ and beam can be accelerated from the first cell of RFQ. In this presentation, results of design study for the RFQ without bunching section will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA04

Export •

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

WEPOA15

Installation Progress at the PIP-II Injector Test at Fermilab

ion, controls, MMI, linac

722

C.M. Baffes, M.L. Alvarez, R. Andrews, A.Z. Chen, J. Czajkowski, P. Derwent, J.P. Edelen, B.M. Hanna, B.D. Hartsell, K.R. Kendziora, D.V. Mitchell, L.R. Prost, V.E. Scarpine, A.V. Shemyakin, J. Steimel, T.J. Zuchnik
Fermilab, Batavia, Illinois, USA
A.L. Edelen
CSU, Fort Collins, Colorado, USA

Funding: Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy
A CW-compatible, pulsed H⁻ superconducting linac 'PIP-II' is being planned to upgrade Fermilab's injection complex. To validate the concept of the front-end of such a machine, a test accelerator (The PIP-II Injector Test, formerly known as "PXIE") is under construction. The warm part of this accelerator comprises a 10 mA DC 30 keV H⁻ ion source, a 2m-long LEBT, a 2.1 MeV CW RFQ, and a 10-m long MEBT that is capable of creating a large variety of bunch structures. The paper will report on the installation of the RFQ and the first sections of the MEBT and related mechanical design considerations.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA15

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WEPOA52

Modeling and Simulation of RFQs for Analysis of Fields and Frequency Deviations with Respect to Internal Dimensional Errors

ion, simulation, resonance, operation

810

Y.W. Kang, S.W. Lee
ORNL, Oak Ridge, Tennessee, USA

Funding: This work was supported by SNS through UTBattelle, LLC, under contract DEAC0500OR22725 for the U.S.DOE.
Performance of radio frequency quadrupole (RFQ) is sensitive to the errors in internal dimensions which shift resonance frequency and distort field distribution on the beam axis along the structure. The SNS RFQ has been retuned three times to compensate the deviations in frequency and field flatness with suspected dimensional changes since the start of the project for continuous operation with H⁻ ion beams. SNS now has a new RFQ as a spare that is installed in beam test facility (BTF), a low energy test accelerator. In order to understand and predict the performance deviation, full 3D modeling and simulation were performed for the SNS RFQs. Field and frequency errors from hypothetical transverse vane perturbations, and vane erosion (and metal deposition such as Cesium introduced by the ion source operation) at the low energy ends are discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA52

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WEPOA56

Design of RFQ Linac to Accelerate High Current Lithium Ion Beam from Laser Ion Source for Compact Neutron Source

ion, neutron, linac, ion-source

820

S. Ikeda, T. Kanesue, M. Okamura
BNL, Upton, Long Island, New York, USA

Accelerator-driven compact neutron sources have been developed to conduct nondestructive inspection more conveniently and/or on the spot with lower cost than other neutron sources, such as spallation sources and nuclear reactors. In typical compact source, proton or deuteron are injected into Li or Be. To develop a higher flax source than conventional ones, we propose a source with 7Li beam generated by laser ion source using direct injection scheme (DPIS) into RFQ linac. Because of the higher velocity of center of mass than that in the case of proton beam injection, generated neutrons are more collimated. In addition, laser ion source with DPIS is expected to accelerate mA class fully ionized 7Li beam stably with simple setup, while it is difficult for conventional ion sources. The high collimation and high current are expected to lead to higher neutron flax. In this presentation, we present a design of RFQ linac optimized to accelerate such a high current beam with shorter distance.

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reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-WEPOA56

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FRB1IO02

LIGHT: A Linear Accelerator for Proton Therapy

ion, linac, proton, MMI

1282

D. Ungaro, A. Degiovanni, P. Stabile
ADAM SA, Geneva, Switzerland

ADAM, Application of Detectors and Accelerators to Medicine is a Swiss Company based in Geneva Switzerland established on 20th December 2007. ADAM was founded to promote scientific know-how and innovations in medical technology for cancer treatment. In 2007 a first partnership agreement was signed with CERN and in 2011 ADAM has been officially recognized as CERN spin-off. After the first research results other partnership agreements were signed between ADAM and CERN with the main goal of establishing a framework within which the two parties can collaborate to develop novel technologies for detectors and accelerators. Currently ADAM research activity is mainly focused on the construction and testing of its first linear accelerator for medical application: LIGHT (Linac for Image-Guided Hadron Therapy). LIGHT is an innovative linear accelerator designed to revolutionise hadron therapy facilities by simplifying the infrastructure and make them profitable from an industrial point of view while providing a better quality beam. The current design allow LIGHT to accelerate proton beam up to 230MeV with several advantages comparing to the current solutions present in the market.

Slides FRB1IO02 [7.447 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-FRB1IO02

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