LINAC2016 - List of Keywords (interface)

Paper	Title	Other Keywords	Page
MOPLR070	Integration of Interfaces and Stabilization System in the Design of a Drift Tube Linac	DTL, simulation, vacuum, linac	294
	R. De Prisco, A.R. Karlsson Lund University, Lund, Sweden M. Eshraqi, Y.I. Levinsen, R. Miyamoto ESS, Lund, Sweden
	Making an accurate RF design of any accelerating structure is fundamental to ensure that electromagnetic and beam dynamics requirements will be achieved. This is essential for the most complicated accelerating structures like the drift tube linac: in this case a meticulous design facilitates the RF commissioning too. In this paper the influence of the interfaces and of the field stabilization system on the RF design is analyzed and an advanced design methodology to mitigate field degradation is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR070
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THPRC030	Plasma Window as Charge Stripper Complement	plasma, ion, vacuum, electron	836
	A. Lajoie NSCL, East Lansing, Michigan, USA A. Hershcovitch, P. Thieberger BNL, Upton, Long Island, New York, USA F. Marti FRIB, East Lansing, USA
	Funding: NSF Cooperative Agreement, Award No. PHY-1102511 Modern ion accelerators, particularly heavy ion accelerators, almost universally make use of charge stripping. A challenge facing facilities, as the demand for higher intensity beams rises, is a stripping media that's highly resistant to degradation, such as a recirculating He gas stripper. A method of keeping the He gas localized in a segment along the beamline by means of a Plasma Window (PW) positioned on both sides of the gas stripper has been proposed and the initial design set forth by Ady Hershcovitch. With a cascaded plasma arc being the interface between high pressure stripper and low pressure beamline, the goal is to minimize gas flowrate from the stripper to the beamline in order to maintain sufficient isolation of the He gas. We present the initial results from the test stand developed at Michigan State University and the planned experimental program that will follow.
	Poster THPRC030 [0.626 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPRC030
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THPRC032	Towards User Defined Web Applications in Accelerator Labs	software, database, EPICS, GUI	843
	D. Liu FRIB, East Lansing, USA
	Most Web application users in accelerator labs understand the basics of data types and data structures. They have in-depth knowledge about accelerator physics and other engineering domains. Some even develop software applications by themselves. In the approach of user-defined web applications, a user defines her/his own web application, test and use it first before sharing it to other users. It saves the communication efforts between developers and users, reduces the time from application design to production. Most importantly, users become the owner of the application and naturally the owner of the data that the application collects and produces. This will largely improve an application's quality and user experience. At FRIB, we have been practicing this approach. One of our applications, the traveler, has been developed and operated for about three years, and used by users from various departments including cryomodule, electrical engineering, controls, and business development. The traveler application allows users to design their data collection interface in a what-you-see-is-what-you-get way, and to release it by sharing with other users and groups in the lab. We are now designing and developing a generic data store that will enable users to define their own data structure, to track structure and instance value changes, and to control the access to the data. This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPRC032
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THPLR011	Traveling Wave Accelerating Structure Power Input Calculation With Equivalent Circuit Method	coupling, impedance, operation, resonance	864
	S.V. Matsievskiy, V.I. Kaminskiy MEPhI, Moscow, Russia
	Nowadays linac accelerating RF systems design is usually done by the finite difference method. It provides high accuracy of calculations and freedom in topology choosing, but may draw considerable amounts of computer resources with long calculation times. Alternative to this method, equivalent circuit method exists. The basic idea of this method is to build a lumped element circuit, which with certain approximation acts as an original accelerating cell. It drastically reduces the number of equations to solve. This method is long known but usually only used for the particular accelerating structures when speed of calculation is a key-factor. This paper describes an attempt to create more universal and user-friendly software application for calculating electrical field distribution in accelerating structures, provides mathematical equations this software is based on. The resulting application may be used for preliminary calculations of acceleration structures and help to determine cells electrodynamic parameters reducing overall design time.
	Poster THPLR011 [0.789 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR011
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THPLR043	EPICS IOC Prototype of FRIB Machine Protection System	status, FPGA, controls, hardware	949
	L. Wang, M. Ikegami, Z. Li, G. Shen, S. Zhao FRIB, East Lansing, USA M.A. Davis NSCL, East Lansing, Michigan, USA
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 The FRIB Machine Protection System (MPS) is designed to protect accelerator components from damage by the beam in case of operating failure. MPS includes master and slave nodes, which are controlled by MPS IOC. In this paper, we present design of MPS IOC and status of its prototyping.
	Poster THPLR043 [0.500 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR043
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPLR070

Integration of Interfaces and Stabilization System in the Design of a Drift Tube Linac

DTL, simulation, vacuum, linac

294

R. De Prisco, A.R. Karlsson
Lund University, Lund, Sweden
M. Eshraqi, Y.I. Levinsen, R. Miyamoto
ESS, Lund, Sweden

Making an accurate RF design of any accelerating structure is fundamental to ensure that electromagnetic and beam dynamics requirements will be achieved. This is essential for the most complicated accelerating structures like the drift tube linac: in this case a meticulous design facilitates the RF commissioning too. In this paper the influence of the interfaces and of the field stabilization system on the RF design is analyzed and an advanced design methodology to mitigate field degradation is presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR070

Export •

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

THPRC030

Plasma Window as Charge Stripper Complement

plasma, ion, vacuum, electron

836

A. Lajoie
NSCL, East Lansing, Michigan, USA
A. Hershcovitch, P. Thieberger
BNL, Upton, Long Island, New York, USA
F. Marti
FRIB, East Lansing, USA

Funding: NSF Cooperative Agreement, Award No. PHY-1102511
Modern ion accelerators, particularly heavy ion accelerators, almost universally make use of charge stripping. A challenge facing facilities, as the demand for higher intensity beams rises, is a stripping media that's highly resistant to degradation, such as a recirculating He gas stripper. A method of keeping the He gas localized in a segment along the beamline by means of a Plasma Window (PW) positioned on both sides of the gas stripper has been proposed and the initial design set forth by Ady Hershcovitch. With a cascaded plasma arc being the interface between high pressure stripper and low pressure beamline, the goal is to minimize gas flowrate from the stripper to the beamline in order to maintain sufficient isolation of the He gas. We present the initial results from the test stand developed at Michigan State University and the planned experimental program that will follow.

Poster THPRC030 [0.626 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPRC030

Export •

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

THPRC032

Towards User Defined Web Applications in Accelerator Labs

software, database, EPICS, GUI

843

D. Liu
FRIB, East Lansing, USA

Most Web application users in accelerator labs understand the basics of data types and data structures. They have in-depth knowledge about accelerator physics and other engineering domains. Some even develop software applications by themselves. In the approach of user-defined web applications, a user defines her/his own web application, test and use it first before sharing it to other users. It saves the communication efforts between developers and users, reduces the time from application design to production. Most importantly, users become the owner of the application and naturally the owner of the data that the application collects and produces. This will largely improve an application's quality and user experience. At FRIB, we have been practicing this approach. One of our applications, the traveler, has been developed and operated for about three years, and used by users from various departments including cryomodule, electrical engineering, controls, and business development. The traveler application allows users to design their data collection interface in a what-you-see-is-what-you-get way, and to release it by sharing with other users and groups in the lab. We are now designing and developing a generic data store that will enable users to define their own data structure, to track structure and instance value changes, and to control the access to the data.
This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPRC032

Export •

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

THPLR011

Traveling Wave Accelerating Structure Power Input Calculation With Equivalent Circuit Method

coupling, impedance, operation, resonance

864

S.V. Matsievskiy, V.I. Kaminskiy
MEPhI, Moscow, Russia

Nowadays linac accelerating RF systems design is usually done by the finite difference method. It provides high accuracy of calculations and freedom in topology choosing, but may draw considerable amounts of computer resources with long calculation times. Alternative to this method, equivalent circuit method exists. The basic idea of this method is to build a lumped element circuit, which with certain approximation acts as an original accelerating cell. It drastically reduces the number of equations to solve. This method is long known but usually only used for the particular accelerating structures when speed of calculation is a key-factor. This paper describes an attempt to create more universal and user-friendly software application for calculating electrical field distribution in accelerating structures, provides mathematical equations this software is based on. The resulting application may be used for preliminary calculations of acceleration structures and help to determine cells electrodynamic parameters reducing overall design time.

Poster THPLR011 [0.789 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR011

Export •

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

THPLR043

EPICS IOC Prototype of FRIB Machine Protection System

status, FPGA, controls, hardware

949

L. Wang, M. Ikegami, Z. Li, G. Shen, S. Zhao
FRIB, East Lansing, USA
M.A. Davis
NSCL, East Lansing, Michigan, USA

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The FRIB Machine Protection System (MPS) is designed to protect accelerator components from damage by the beam in case of operating failure. MPS includes master and slave nodes, which are controlled by MPS IOC. In this paper, we present design of MPS IOC and status of its prototyping.

Poster THPLR043 [0.500 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-THPLR043

Export •

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