IPAC2013 - List of Keywords (site)

Paper	Title	Other Keywords	Page
MOPWO021	Data Management and Analysis for Beam Dynamics Simulation	lattice, simulation, EPICS, quadrupole	927
	D. Zyuzin FZJ, Jülich, Germany S.N. Andrianov, N.V. Kulabukhova St. Petersburg State University, St. Petersburg, Russia
	Computer simulation of modern accelerator system is based on a number of specialized computer codes. Complexity of concerned processes and interpretation of simulation results requires comfortable and effective tools to design accelerator structure and beam characteristics, carry out computer experiments, process and visualize data. This paper proposes a prototype system with web-interface which allows the full research cycle: from lattice generation to data visualization. This approach represents a valuable tool for beam physicist providing methods to benchmark simulation engines as well as providing additional instruments for understanding physical processes in accelerator. The corresponding tools were used in application to the spin-orbit motion problems in electrostatic accelerators.

TUPFI066	Muon Ionization Cooling Experiment Step VI	solenoid, simulation, emittance, target	1502
	D. Rajaram Illinois Institute of Technology, Chicago, Illinois, USA P. Snopok IIT, Chicago, Illinois, USA
	In the Muon Ionization Cooling Experiment (MICE) the transverse emittance of the muon beam is reduced (muon cooling) by passing it through low-Z material, then through RF cavities to compensate for the energy loss. Transverse emittance reduction of the muon beam will be demonstrated for the first time in MICE Step IV configuration using liquid Hydrogen absorbers as well as a variety of solid absorbers. Current status and efforts towards Step IV are summarized, including hardware fabrication and testing, Monte Carlo simulations, track reconstruction algorithms.

WEIB204	Industry and Science, POSCO and POSTECH Case	linac, FEL, klystron, storage-ring	2115
	W. Namkung PAL, Pohang, Kyungbuk, Republic of Korea
	Funding: * Supported by MEST and POSTECH POSCO is a world-leading iron and steel company established in 1968 in Pohang, in the South East coast of Korea. Starting with 1.0 million ton size in 1973, the company made profits even in the first year. While its capacity has been increased to 40 million tons with another works in Gwangyang, POSCO paid attention on education to attract intellectuals to Pohang and Korea. It results in establishing a small-sized university, Pohang University of Science and Technology (POSTECH) in 1987. POSTECH immediately decided to construct a third generation synchrotron light source of 2.0 GeV, Pohang Light Source (PLS) on its campus in 1988, with support from POSCO and also Government. POSTECH achieved a high rank in the world, and PLS is upgraded to 3.0 GeV in 2011. A new PAL-XFEL of 10.0 GeV is now under construction. POSCO's consistent policy is the key of the success of POSTECH and Pohang Light Source. This is an unprecedented example of the relationship between industry and science.
	Slides WEIB204 [4.759 MB]

WEPWO001	Power Couplers for XFEL	vacuum, pick-up, controls, monitoring	2310
	W. Kaabi, M. El Khaldi, A. Gallas, P. Lepercq, C. Magueur, A. Variola, A. Verguet LAL, Orsay, France W.-D. Möller DESY, Hamburg, Germany
	The LAL contribution to the XFEL project will be the delivery of 800 power couplers to equip 100 Cry-modules. The LAL’s tasks consist on the industrial monitoring and coupler quality control at two different production sites, in addition to the RF conditioning at LAL of the 800 produced couplers. The RF conditioning and all the coupler preparation process will be held in a 70m2 ISO5 clean room. An RF power station delivering 5MW, allow 8 couplers conditioning in the same time. Being in production control side and also RF conditioning one, the aim of LAL is to reach the rate of 8 couplers delivery per week, after a rump up phase. The starting of Coupler mass production is scheduled for beginning 2013.

WEPFI072	Analysis of Breakdown Damage in an 805 MHz Pillbox Cavity for Muon Ionization Cooling R&D	cavity, cathode, plasma, radiation	2857
	D.L. Bowring, D. Li LBNL, Berkeley, California, USA A. Moretti, Y. Torun Fermilab, Batavia, USA
	When operating in multi-Tesla solenoidal magnetic fields, normal-conducting cavities exhibit RF breakdown at anomalously low gradients. This breakdown behavior may be due to field-emitted electrons, focused by the magnetic field into "beamlets" with relatively large current densities. These beamlets may then cause pulsed heating and cyclic fatigue damage on cavity interior surfaces. If this model is correct, materials with long radiation lengths (relative to copper) may alleviate the problem of RF breakdown in strong magnetic fields. To study this phenomenon, RF breakdown was induced on pairs of "buttons" in an 805 MHz pillbox cavity. The shape of the buttons creates a local enhancement of the surface electric field, such that breakdown occurs preferentially on the button surface. Beryllium and copper buttons were tested in order to evaluate the effect of radiation length on RF breakdown performance. This poster presents an analysis of the damage to these buttons and suggests a path forward for future materials R&D related to breakdown in strong magnetic fields.

WEPFI083	High Power Tests of the 2-Pin Waveguide Structures	factory, linear-collider, collider, electron	2890
	F.Y. Wang, Z. Li SLAC, Menlo Park, California, USA
	An X-band Two-Pin Waveguide Structure has been designed to study the influence of power flow on rf breakdown. Three different sets of pins will be tested at SLAC. These sets were designed to achieve a similar peak surface electric field on one of the pins for input rf power levels that vary by about an order of magnitude (the other pin is used for matching). Two sets of pins have been tested so far, and the breakdown rate was found to be strongly dependent on the power flow. In this paper, we review the experimental setup, the complete set of results and their implications.

WEPME027	Analysis of Tidal Effects on Measurement Accuracy of HLS	alignment, synchrotron, synchrotron-radiation, radiation	2989
	S.F. Xu, X.Y. He, P. Wang, W. Wang, Q.Y. Yao USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Natural Science Foundation of China HLS* is mainly used in survey and high-accuracy alignment in particle accelerator. Monitoring the earth tides is primarily introduced in this paper. Based on the earth tide theory and the ocean load effects on the planet earth, the tidal effects on a hydrostatic leveling system is analyzed. Finally, the local ground deformation is obtained,and the current research establish a foundation for the further study. HLS-hydrostatic levelling system

WEPME041	The Distance from CERN to LNGS	target, controls, survey, alignment	3016
	M.A. Jones, I. Efthymiopoulos, D.P. Missiaen CERN, Geneva, Switzerland
	Obviously the distance between the CNGS Target at CERN and the LNGS Opera experiment cannot be measured directly and in fact requires the combination of three independent sets of measurements: two to link underground reference points at each site to corresponding points on the surface; and a third to link the surface points at both sites. Until the Opera results raised questions about the speed at which neutrinos travelled, the main alignment concern for the CNGS beamline had been an orientation problem -to ensure that the beamline arrived to within ~100 m of its target at LNGS. GPS measurements at the two sites, and the use of gyro-theodolite measurements in the tunnel at CERN, ensured that the absolute alignment of the beamline was established to the required accuracy. New determinations of the links between the surface and the tunnel were not considered necessary until interest grew in the distance between the sites, at which point additional measurement campaigns were organised in order to further reduce the uncertainty in the distance. Details of all these campaigns and the distance estimates will be given.

WEPME050	Alignment Design and Status of Taiwan Photon Source	survey, alignment, storage-ring, laser	3043
	W.Y. Lai, J.-R. Chen, M.L. Chen, P.S.D. Chuang, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, C.-S. Lin, C.J. Lin, H.C. Lin, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu NSRRC, Hsinchu, Taiwan J.-R. Chen National Tsing Hua University, Hsinchu, Taiwan
	Taiwan Photon Source (TPS) is a new 3-GeV ring with characteristics of great brightness and small emittance, at present under construction at National Synchrotron Radiation Research Center (NSRRC) Taiwan. The positioning of the magnets is highly sensitive to alignment errors, and the entire building will be constructed half underground at depth 12 m relative to Taiwan Light Source (TLS) for stability reasons; for these reasons the survey and alignment work is confined and difficult. To position magnets precisely and quickly, a highly accurate auto-tuning girder system combined with a survey network was designed to accomplish the alignment tasks. The survey network includes a preliminary Global Positioning System (GPS) network and a laser tracking network. The position data from the survey network define a basis for the system of motorized girders to auto-tune and to improve the accuracy. The detailed survey and alignment design, installation process is described in this paper.

THPFI041	Installation and Operation of the Beamlines for the 100-MeV Proton Linac	proton, linac, DTL, alignment	3376
	B.-S. Park, Y.-S. Cho, J.-H. Jang, D.I. Kim, H.S. Kim, H.-J. Kwon, J.Y. Ryu, K.T. Seol, Y.-G. Song, S.P. Yun KAERI, Daejon, Republic of Korea
	Funding: This work was supported by the Ministry of Education, Science and Technology of the Korean Government. Beamlines and 100-MeV proton linac have been developed for 1st phase of KOMAC(Korea Multi-purpose Accelerator Complex) at the Gyeong-ju site. The linac supply either 20-MeV or 100-MeV proton beams for beam applications. Each proton beam can be transported to 2 beamlines for industrial purpose and 3 beamlines for various researches. At the first phase, 2 beamlines were installed and under test. A detailed description of the installation and the preliminary test results will be presented in this paper.

THPFI056	Design Study for a Future LAGUNA-LBNO Long-baseline Neutrino Facility at CERN	target, secondary-beams, focusing, hadron	3418
	I. Efthymiopoulos, J. Alabau-Gonzalvo, A. Alekou, F. Antoniou, M. Benedikt, M. Calviani, A. Ferrari, R. Garoby, F. Gerigk, S.S. Gilardoni, B. Goddard, A. Kosmicki, C. Lazaridis, J.A. Osborne, Y. Papaphilippou, A.S. Parfenova, E.N. Shaposhnikova, R. Steerenberg, P. Velten, H. Vincke CERN, Geneva, Switzerland
	A design study for a long baseline neutrino oscillation experiment (LBNO) with a new conventional neutrino beamline facility (CN2PY) at CERN was initiated in September 2011, supported by EU/FP7 funds. The beam will be aimed at a next generation deep-underground neutrino observatory located at the Pyhasalmi (Finland) mine at a distance of 2300 km. In an initial phase the CN2PY facility will use a 400 GeV beam extracted from SPS up to a maximum power of 750 kW, and in a second phase a 2 MW beam of about 50 GeV produced by a new High-Power Proton Synchrotron accelerator using the LP-SPL as injector also under design. The paper will focus on the design challenges of this MW-class facility and on the optimization studies of the secondary beam elements (target and horns) to produce a neutrino beam spectrum that matches best the experimental requirements for neutrino flavor oscillations and CP-violation tests. The challenges and bottlenecks in the existing CERN accelerator complex to produce the high-intensity beams foreseen for this facility at the initial phase are discussed.

THPWA035	Intervention Management from Operation to Shutdown	radiation, controls, feedback, cryogenics	3705
	C. Garino, B. Daudin, J. De Jonghe, A. Dorsival, F. B. Dos Santos Pedrosa, G. Dumont, K. Foraz, E.R.F. Reguero Fuentes CERN, Geneva, Switzerland
	The Intervention Management Planning and Coordination Tool (IMPACT) is now widely used in all the accelerator complex and beyond. This unique repository improves the availability of the intervention information for all facilities, and enhances its traceability. It supports a standardized approval workflow and direct link to the access system for improved control and productivity. IMPACT currently has 1418 active users who have defined 6880 intervention requests in 2012 so far. In 2013, the CERN Accelerator complex will enter a shutdown mode after a long period of operation. Careful preparation and scheduling of activities is paramount in order to keep the shutdown as short as possible, whilst guaranteeing safety. During execution, strict control of access will be enforced considering the radiation levels. This paper will summarize the main improvements to IMPACT in this context: work dose planning with respect to ALARA principles including integration with the operational dosimetry system and automatic generation of safety documents from intervention data.

FRYCA01	Neutrino Physics and Requirements to Accelerators	proton, target, factory, background	4010
	Y.F. Wang IHEP, Bejing, People's Republic of China
	This presentation reviews recent progress of neutrino experiments, both reactor- and accelerator-based, and discusses requirements for accelerators.
	Slides FRYCA01 [4.070 MB]

Paper

Title

Other Keywords

Page

MOPWO021

Data Management and Analysis for Beam Dynamics Simulation

lattice, simulation, EPICS, quadrupole

927

D. Zyuzin
FZJ, Jülich, Germany
S.N. Andrianov, N.V. Kulabukhova
St. Petersburg State University, St. Petersburg, Russia

Computer simulation of modern accelerator system is based on a number of specialized computer codes. Complexity of concerned processes and interpretation of simulation results requires comfortable and effective tools to design accelerator structure and beam characteristics, carry out computer experiments, process and visualize data. This paper proposes a prototype system with web-interface which allows the full research cycle: from lattice generation to data visualization. This approach represents a valuable tool for beam physicist providing methods to benchmark simulation engines as well as providing additional instruments for understanding physical processes in accelerator. The corresponding tools were used in application to the spin-orbit motion problems in electrostatic accelerators.

TUPFI066

Muon Ionization Cooling Experiment Step VI

solenoid, simulation, emittance, target

1502

D. Rajaram
Illinois Institute of Technology, Chicago, Illinois, USA
P. Snopok
IIT, Chicago, Illinois, USA

In the Muon Ionization Cooling Experiment (MICE) the transverse emittance of the muon beam is reduced (muon cooling) by passing it through low-Z material, then through RF cavities to compensate for the energy loss. Transverse emittance reduction of the muon beam will be demonstrated for the first time in MICE Step IV configuration using liquid Hydrogen absorbers as well as a variety of solid absorbers. Current status and efforts towards Step IV are summarized, including hardware fabrication and testing, Monte Carlo simulations, track reconstruction algorithms.

WEIB204

Industry and Science, POSCO and POSTECH Case

linac, FEL, klystron, storage-ring

2115

W. Namkung
PAL, Pohang, Kyungbuk, Republic of Korea

Funding: * Supported by MEST and POSTECH
POSCO is a world-leading iron and steel company established in 1968 in Pohang, in the South East coast of Korea. Starting with 1.0 million ton size in 1973, the company made profits even in the first year. While its capacity has been increased to 40 million tons with another works in Gwangyang, POSCO paid attention on education to attract intellectuals to Pohang and Korea. It results in establishing a small-sized university, Pohang University of Science and Technology (POSTECH) in 1987. POSTECH immediately decided to construct a third generation synchrotron light source of 2.0 GeV, Pohang Light Source (PLS) on its campus in 1988, with support from POSCO and also Government. POSTECH achieved a high rank in the world, and PLS is upgraded to 3.0 GeV in 2011. A new PAL-XFEL of 10.0 GeV is now under construction. POSCO's consistent policy is the key of the success of POSTECH and Pohang Light Source. This is an unprecedented example of the relationship between industry and science.

Slides WEIB204 [4.759 MB]

WEPWO001

Power Couplers for XFEL

vacuum, pick-up, controls, monitoring

2310

W. Kaabi, M. El Khaldi, A. Gallas, P. Lepercq, C. Magueur, A. Variola, A. Verguet
LAL, Orsay, France
W.-D. Möller
DESY, Hamburg, Germany

The LAL contribution to the XFEL project will be the delivery of 800 power couplers to equip 100 Cry-modules. The LAL’s tasks consist on the industrial monitoring and coupler quality control at two different production sites, in addition to the RF conditioning at LAL of the 800 produced couplers. The RF conditioning and all the coupler preparation process will be held in a 70m2 ISO5 clean room. An RF power station delivering 5MW, allow 8 couplers conditioning in the same time. Being in production control side and also RF conditioning one, the aim of LAL is to reach the rate of 8 couplers delivery per week, after a rump up phase. The starting of Coupler mass production is scheduled for beginning 2013.

WEPFI072

Analysis of Breakdown Damage in an 805 MHz Pillbox Cavity for Muon Ionization Cooling R&D

cavity, cathode, plasma, radiation

2857

D.L. Bowring, D. Li
LBNL, Berkeley, California, USA
A. Moretti, Y. Torun
Fermilab, Batavia, USA

When operating in multi-Tesla solenoidal magnetic fields, normal-conducting cavities exhibit RF breakdown at anomalously low gradients. This breakdown behavior may be due to field-emitted electrons, focused by the magnetic field into "beamlets" with relatively large current densities. These beamlets may then cause pulsed heating and cyclic fatigue damage on cavity interior surfaces. If this model is correct, materials with long radiation lengths (relative to copper) may alleviate the problem of RF breakdown in strong magnetic fields. To study this phenomenon, RF breakdown was induced on pairs of "buttons" in an 805 MHz pillbox cavity. The shape of the buttons creates a local enhancement of the surface electric field, such that breakdown occurs preferentially on the button surface. Beryllium and copper buttons were tested in order to evaluate the effect of radiation length on RF breakdown performance. This poster presents an analysis of the damage to these buttons and suggests a path forward for future materials R&D related to breakdown in strong magnetic fields.

WEPFI083

High Power Tests of the 2-Pin Waveguide Structures

factory, linear-collider, collider, electron

2890

F.Y. Wang, Z. Li
SLAC, Menlo Park, California, USA

An X-band Two-Pin Waveguide Structure has been designed to study the influence of power flow on rf breakdown. Three different sets of pins will be tested at SLAC. These sets were designed to achieve a similar peak surface electric field on one of the pins for input rf power levels that vary by about an order of magnitude (the other pin is used for matching). Two sets of pins have been tested so far, and the breakdown rate was found to be strongly dependent on the power flow. In this paper, we review the experimental setup, the complete set of results and their implications.

WEPME027

Analysis of Tidal Effects on Measurement Accuracy of HLS

alignment, synchrotron, synchrotron-radiation, radiation

2989

S.F. Xu, X.Y. He, P. Wang, W. Wang, Q.Y. Yao
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Natural Science Foundation of China
HLS* is mainly used in survey and high-accuracy alignment in particle accelerator. Monitoring the earth tides is primarily introduced in this paper. Based on the earth tide theory and the ocean load effects on the planet earth, the tidal effects on a hydrostatic leveling system is analyzed. Finally, the local ground deformation is obtained,and the current research establish a foundation for the further study.
HLS-hydrostatic levelling system

WEPME041

The Distance from CERN to LNGS

target, controls, survey, alignment

3016

M.A. Jones, I. Efthymiopoulos, D.P. Missiaen
CERN, Geneva, Switzerland

Obviously the distance between the CNGS Target at CERN and the LNGS Opera experiment cannot be measured directly and in fact requires the combination of three independent sets of measurements: two to link underground reference points at each site to corresponding points on the surface; and a third to link the surface points at both sites. Until the Opera results raised questions about the speed at which neutrinos travelled, the main alignment concern for the CNGS beamline had been an orientation problem -to ensure that the beamline arrived to within ~100 m of its target at LNGS. GPS measurements at the two sites, and the use of gyro-theodolite measurements in the tunnel at CERN, ensured that the absolute alignment of the beamline was established to the required accuracy. New determinations of the links between the surface and the tunnel were not considered necessary until interest grew in the distance between the sites, at which point additional measurement campaigns were organised in order to further reduce the uncertainty in the distance. Details of all these campaigns and the distance estimates will be given.

WEPME050

Alignment Design and Status of Taiwan Photon Source

survey, alignment, storage-ring, laser

3043

W.Y. Lai, J.-R. Chen, M.L. Chen, P.S.D. Chuang, H.C. Ho, K.H. Hsu, D.-G. Huang, C.K. Kuan, C.-S. Lin, C.J. Lin, H.C. Lin, H.M. Luo, S.Y. Perng, P.L. Sung, T.C. Tseng, H.S. Wang, M.H. Wu
NSRRC, Hsinchu, Taiwan
J.-R. Chen
National Tsing Hua University, Hsinchu, Taiwan

Taiwan Photon Source (TPS) is a new 3-GeV ring with characteristics of great brightness and small emittance, at present under construction at National Synchrotron Radiation Research Center (NSRRC) Taiwan. The positioning of the magnets is highly sensitive to alignment errors, and the entire building will be constructed half underground at depth 12 m relative to Taiwan Light Source (TLS) for stability reasons; for these reasons the survey and alignment work is confined and difficult. To position magnets precisely and quickly, a highly accurate auto-tuning girder system combined with a survey network was designed to accomplish the alignment tasks. The survey network includes a preliminary Global Positioning System (GPS) network and a laser tracking network. The position data from the survey network define a basis for the system of motorized girders to auto-tune and to improve the accuracy. The detailed survey and alignment design, installation process is described in this paper.

THPFI041

Installation and Operation of the Beamlines for the 100-MeV Proton Linac

proton, linac, DTL, alignment

3376

B.-S. Park, Y.-S. Cho, J.-H. Jang, D.I. Kim, H.S. Kim, H.-J. Kwon, J.Y. Ryu, K.T. Seol, Y.-G. Song, S.P. Yun
KAERI, Daejon, Republic of Korea

Funding: This work was supported by the Ministry of Education, Science and Technology of the Korean Government.
Beamlines and 100-MeV proton linac have been developed for 1st phase of KOMAC(Korea Multi-purpose Accelerator Complex) at the Gyeong-ju site. The linac supply either 20-MeV or 100-MeV proton beams for beam applications. Each proton beam can be transported to 2 beamlines for industrial purpose and 3 beamlines for various researches. At the first phase, 2 beamlines were installed and under test. A detailed description of the installation and the preliminary test results will be presented in this paper.

THPFI056

Design Study for a Future LAGUNA-LBNO Long-baseline Neutrino Facility at CERN

target, secondary-beams, focusing, hadron

3418

I. Efthymiopoulos, J. Alabau-Gonzalvo, A. Alekou, F. Antoniou, M. Benedikt, M. Calviani, A. Ferrari, R. Garoby, F. Gerigk, S.S. Gilardoni, B. Goddard, A. Kosmicki, C. Lazaridis, J.A. Osborne, Y. Papaphilippou, A.S. Parfenova, E.N. Shaposhnikova, R. Steerenberg, P. Velten, H. Vincke
CERN, Geneva, Switzerland

A design study for a long baseline neutrino oscillation experiment (LBNO) with a new conventional neutrino beamline facility (CN2PY) at CERN was initiated in September 2011, supported by EU/FP7 funds. The beam will be aimed at a next generation deep-underground neutrino observatory located at the Pyhasalmi (Finland) mine at a distance of 2300 km. In an initial phase the CN2PY facility will use a 400 GeV beam extracted from SPS up to a maximum power of 750 kW, and in a second phase a 2 MW beam of about 50 GeV produced by a new High-Power Proton Synchrotron accelerator using the LP-SPL as injector also under design. The paper will focus on the design challenges of this MW-class facility and on the optimization studies of the secondary beam elements (target and horns) to produce a neutrino beam spectrum that matches best the experimental requirements for neutrino flavor oscillations and CP-violation tests. The challenges and bottlenecks in the existing CERN accelerator complex to produce the high-intensity beams foreseen for this facility at the initial phase are discussed.

THPWA035

Intervention Management from Operation to Shutdown

radiation, controls, feedback, cryogenics

3705

C. Garino, B. Daudin, J. De Jonghe, A. Dorsival, F. B. Dos Santos Pedrosa, G. Dumont, K. Foraz, E.R.F. Reguero Fuentes
CERN, Geneva, Switzerland

The Intervention Management Planning and Coordination Tool (IMPACT) is now widely used in all the accelerator complex and beyond. This unique repository improves the availability of the intervention information for all facilities, and enhances its traceability. It supports a standardized approval workflow and direct link to the access system for improved control and productivity. IMPACT currently has 1418 active users who have defined 6880 intervention requests in 2012 so far. In 2013, the CERN Accelerator complex will enter a shutdown mode after a long period of operation. Careful preparation and scheduling of activities is paramount in order to keep the shutdown as short as possible, whilst guaranteeing safety. During execution, strict control of access will be enforced considering the radiation levels. This paper will summarize the main improvements to IMPACT in this context: work dose planning with respect to ALARA principles including integration with the operational dosimetry system and automatic generation of safety documents from intervention data.

FRYCA01

Neutrino Physics and Requirements to Accelerators

proton, target, factory, background

4010

Y.F. Wang
IHEP, Bejing, People's Republic of China

This presentation reviews recent progress of neutrino experiments, both reactor- and accelerator-based, and discusses requirements for accelerators.

Slides FRYCA01 [4.070 MB]