LINAC2012 - List of Keywords (status)

Paper	Title	Other Keywords	Page
MO1A03	SRF Linac Technology Development at Fermilab	cavity, linac, SRF, cryogenics	110
	V.P. Yakovlev, C.M. Ginsburg Fermilab, Batavia, USA
	Superconducting linear accelerators are developing for different applications – for fundamental researches in High-Energy and High – Intensity Frontiers, nuclear physics, energetics, neutron spallation sources, synchrotron radiation sources, etc. The linac applications dictate the requirements for superconducting acceleration system, and, thus, for SRF technology. Fermilab is currently involved in two projects: ILC and Project X, both are based on SRF technology. For High-Intensity Frontier investigations, the Project X – a multi-experiment facility is developing based on 3 GeV, CW H⁻ linac in the frame of a wide collaboration of US National Laboratories. In a CW H⁻ linac several families of SC cavities are used: half-wave resonators (162.5 MHz); single-spoke cavities, SSR1 and SSR2 (325 MHz); elliptical 5-cell β=0.6 and β=0.9 cavities (650 MHz). Pulsed 3-8 GeV linac and ILC linac are based on 9-cell 1.3 GHz cavities. In the paper the basic requirements and the status of development of SC accelerating cavities, auxiliaries (couplers, tuners, etc.) and cryomodules are presented as well as technology challenges caused by their specifics.
	Slides MO1A03 [3.551 MB]

MOPLB06	Fermilab 1.3 GHz Superconducting RF Cavity and Cryomodule Program for Future Linacs	cavity, cryomodule, linear-collider, linac	153
	C.M. Ginsburg Fermilab, Batavia, USA
	Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. The proposed Project X accelerator and the International Linear Collider are based on superconducting RF technology. As a critical part of this effort, Fermilab has developed an extensive program in 1.3 GHz SRF cavity and cryomodule development. This program includes cavity inspection, surface processing, clean assembly, low-power bare cavity tests and pulsed high-power dressed cavity tests. Well performing cavities have been assembled into cryomodules for pulsed high-power tests and will be tested with beam. In addition, peripheral hardware such as tuners and couplers are under development. The current status and accomplishments of the Fermilab 1.3 GHz activity will be described, as well as the R&D program to extend the existing SRF pulsed operational experience into the CW regime.
	Slides MOPLB06 [1.508 MB]

MOPB051	Changing Attitude to Radiation Hazards and Consequent Opportunities for LINAC Applications	radiation, linac, electron, background	288
	Y. Socol Falcon Analytics, Netanya, Israel
	High-energy LINACs unavoidably yield ionizing radiation. This fact makes them subject to strict regulations and considerably limits applications. During the last two decades the attitude to ionizing radiation hazards seems to become more balanced, as opposed to "radiophobia" of the Cold-War era. Scientifically, the linear no-threshold (LNT) model of radiation damage is more and more questioned. Moreover, the hypotheses of radiation hormesis - beneficial effect of low-dose radiation - is studied. While this scientific debate has not yet given fruit regarding radiation regulation and policy, we may expect this in near to middle term. Namely, the ALARA (as low as reasonably achievable) demand is anticipated to be substituted by some tolerance level, which in turn is anticipated to be very high according to the present standards. The presentation will review the present status of the radiation-hazard debate, and outline anticipated opportunities for LINAC applications, like compact designs and wider industrial outreach.

MOPB052	Fermilab 1.3 GHz Superconducting RF Cavity and Cryomodule Program for Future Linacs	cavity, cryomodule, linear-collider, linac	291
	C.M. Ginsburg Fermilab, Batavia, USA
	Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. The proposed Project X accelerator and the International Linear Collider are based on superconducting RF technology. As a critical part of this effort, Fermilab has developed an extensive program in 1.3 GHz SRF cavity and cryomodule development. This program includes cavity inspection, surface processing, clean assembly, low-power bare cavity tests and pulsed high-power dressed cavity tests. Well performing cavities have been assembled into cryomodules for pulsed high-power tests and will be tested with beam. In addition, peripheral hardware such as tuners and couplers are under development. The current status and accomplishments of the Fermilab 1.3 GHz activity will be described, as well as the R&D program to extend the existing SRF pulsed operational experience into the CW regime.

TUPLB04	Results of Testing of Multi-beam Klystrons for the European XFEL	klystron, cathode, high-voltage, vacuum	448
	V. Vogel, L. Butkowski, A. Cherepenko, S. Choroba, I. Harders, J. Hartung DESY, Hamburg, Germany
	For the European XFEL multi-beam klystrons, which can produce RF power of 10 MW at an RF frequency of 1.3 GHz, at 1.5 ms pulse length and 10 Hz repetition rate, were chosen as RF power sources. Twenty-seven of horizontal multi-beam klystrons (MBK) together with connection modules (CM) will be installed in the XFEL underground tunnel. The CM will be installed on the MBK and connects the MBK to the pulse transformer with only one HV cable, because the CM has a filament transformer inside as well as all diagnostics for HV and cathode current measurements. MBK prototypes together with CM prototypes have been tested for long time at a test stand at DESY, about 3000 hours of operation for each of horizontal MBK with full RF output power, full pulse length and repetition rate of 10 Hz. Testing of first MBKs from series production has been started. In this paper we will give an overview of the test procedure, summarize the current test results and we will give a comparison of the most important parameters.

TUPB004	Results of Testing of Multi-beam Klystrons for the European XFEL	klystron, cathode, high-voltage, vacuum	479
	V. Vogel, L. Butkowski, A. Cherepenko, S. Choroba, I. Harders, J. Hartung DESY, Hamburg, Germany
	For the European XFEL multi-beam klystrons, which can produce RF power of 10 MW at an RF frequency of 1.3 GHz, at 1.5ms pulse length and 10 Hz repetition rate, were chosen as RF power sources. Twenty-seven of horizontal multi-beam klystrons (MBK) together with connection modules (CM) will be installed in the XFEL underground tunnel. The CM will be installed on the MBK and connects the MBK to the pulse transformer with only one HV cable, because the CM has a filament transformer inside as well as all diagnostics for HV and cathode current measurements. MBK prototypes together with CM prototypes have been tested for long time at a test stand at DESY, about 3000 hours of operation for each of horizontal MBK with full RF output power, full pulse length and repetition rate of 10 Hz. Testing of first MBKs from series production has been started. In this paper we will give an overview of the test procedure, summarize the current test results and we will give a comparison of the most important parameters.

TUPB020	Status of the European XFEL 3.9 GHz system	cavity, HOM, cryomodule, coupling	519
	E. Vogel DESY, Hamburg, Germany A. Bosotti, P. Michelato, L. Monaco, C. Pagani, R. Paparella, P. Pierini, D. Sertore INFN/LASA, Segrate (MI), Italy E.R. Harms Fermilab, Batavia, USA
	The third harmonic system at 3.9 GHz of the European XFEL injector section will linearize the bunch RF curvature, induced by first accelerating module, before the first compression stage. This paper presents qualification tests on cavity prototypes and the on-going activities towards the realization of the third harmonic section of the European XFEL in view of its commissioning in 2014.

TUPB040	Status of the Linac SRF Acquisition for FRIB	linac, cryomodule, cavity, SRF	564
	M. Leitner, E.C. Bernard, J. Binkowski, B. Bird, S. Bricker, S. Chouhan, C. Compton, K. Elliott, B. Enkhbat, A.D. Fox, L.L. Harle, M. Hodek, M.J. Johnson, I.M. Malloch, D. R. Miller, S.J. Miller, T. Nellis, D. Norton, R. Oweiss, J.P. Ozelis, J. Popielarski, L. Popielarski, K. Saito, M. Shuptar, G.J. Velianoff, J. Wei, M. Williams, K. Witgen, Y. Xu, Y. Yamazaki, Y. Zhang FRIB, East Lansing, USA A. Facco INFN/LNL, Legnaro (PD), Italy
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE SC0000661. The Facility for Rare Isotope Beams (FRIB) will utilize a high-intensity, superconducting heavy-ion driver linac to provide stable ion beams from protons to uranium up to energies of >200 MeV/u and at a beam power of up to 400 kW. The ions are accelerated to about 0.5 MeV/u using a room-temperature 80.5 MHz RFQ and injected into a superconducting cw linac consisting of 330 individual low-beta cavities in 49 cryomodules operating at 2 K. This paper discusses the current status of the linac SRF acquisition strategy as the project phases into construction mode.

TUPB092	High Power Amplifier Systems for SARAF Phase II	controls, rf-amplifier, insertion, cavity	675
	B. Kaizer, I. Fishman, I.G. Gertz Soreq NRC, Yavne, Israel
	Soreq NRC initiated the establishment of SARAF - Soreq Applied Research Accelerator Facility. SARAF is based on a continuous wave (CW), proton/deuteron RF superconducting linear accelerator with variable energy (5–40 MeV) and current (0.04-5 mA). RF power to each cavity is driven by a High Power Solid State Amplifiers. The paper outlines the design concept of the 10 and 15 kW at 176 MHz power amplifiers that were designed, built, and 10 kW successfully tested. 15 kW is now under construction. The amplifiers are combined from basic 5.5 kW compact 19" 7U water cooled drawer.

Paper

Title

Other Keywords

Page

MO1A03

SRF Linac Technology Development at Fermilab

cavity, linac, SRF, cryogenics

110

V.P. Yakovlev, C.M. Ginsburg
Fermilab, Batavia, USA

Superconducting linear accelerators are developing for different applications – for fundamental researches in High-Energy and High – Intensity Frontiers, nuclear physics, energetics, neutron spallation sources, synchrotron radiation sources, etc. The linac applications dictate the requirements for superconducting acceleration system, and, thus, for SRF technology. Fermilab is currently involved in two projects: ILC and Project X, both are based on SRF technology. For High-Intensity Frontier investigations, the Project X – a multi-experiment facility is developing based on 3 GeV, CW H⁻ linac in the frame of a wide collaboration of US National Laboratories. In a CW H⁻ linac several families of SC cavities are used: half-wave resonators (162.5 MHz); single-spoke cavities, SSR1 and SSR2 (325 MHz); elliptical 5-cell β=0.6 and β=0.9 cavities (650 MHz). Pulsed 3-8 GeV linac and ILC linac are based on 9-cell 1.3 GHz cavities. In the paper the basic requirements and the status of development of SC accelerating cavities, auxiliaries (couplers, tuners, etc.) and cryomodules are presented as well as technology challenges caused by their specifics.

Slides MO1A03 [3.551 MB]

MOPLB06

Fermilab 1.3 GHz Superconducting RF Cavity and Cryomodule Program for Future Linacs

cavity, cryomodule, linear-collider, linac

153

C.M. Ginsburg
Fermilab, Batavia, USA

Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
The proposed Project X accelerator and the International Linear Collider are based on superconducting RF technology. As a critical part of this effort, Fermilab has developed an extensive program in 1.3 GHz SRF cavity and cryomodule development. This program includes cavity inspection, surface processing, clean assembly, low-power bare cavity tests and pulsed high-power dressed cavity tests. Well performing cavities have been assembled into cryomodules for pulsed high-power tests and will be tested with beam. In addition, peripheral hardware such as tuners and couplers are under development. The current status and accomplishments of the Fermilab 1.3 GHz activity will be described, as well as the R&D program to extend the existing SRF pulsed operational experience into the CW regime.

Slides MOPLB06 [1.508 MB]

MOPB051

Changing Attitude to Radiation Hazards and Consequent Opportunities for LINAC Applications

radiation, linac, electron, background

288

Y. Socol
Falcon Analytics, Netanya, Israel

High-energy LINACs unavoidably yield ionizing radiation. This fact makes them subject to strict regulations and considerably limits applications. During the last two decades the attitude to ionizing radiation hazards seems to become more balanced, as opposed to "radiophobia" of the Cold-War era. Scientifically, the linear no-threshold (LNT) model of radiation damage is more and more questioned. Moreover, the hypotheses of radiation hormesis - beneficial effect of low-dose radiation - is studied. While this scientific debate has not yet given fruit regarding radiation regulation and policy, we may expect this in near to middle term. Namely, the ALARA (as low as reasonably achievable) demand is anticipated to be substituted by some tolerance level, which in turn is anticipated to be very high according to the present standards. The presentation will review the present status of the radiation-hazard debate, and outline anticipated opportunities for LINAC applications, like compact designs and wider industrial outreach.

MOPB052

Fermilab 1.3 GHz Superconducting RF Cavity and Cryomodule Program for Future Linacs

cavity, cryomodule, linear-collider, linac

291

C.M. Ginsburg
Fermilab, Batavia, USA

Funding: Operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
The proposed Project X accelerator and the International Linear Collider are based on superconducting RF technology. As a critical part of this effort, Fermilab has developed an extensive program in 1.3 GHz SRF cavity and cryomodule development. This program includes cavity inspection, surface processing, clean assembly, low-power bare cavity tests and pulsed high-power dressed cavity tests. Well performing cavities have been assembled into cryomodules for pulsed high-power tests and will be tested with beam. In addition, peripheral hardware such as tuners and couplers are under development. The current status and accomplishments of the Fermilab 1.3 GHz activity will be described, as well as the R&D program to extend the existing SRF pulsed operational experience into the CW regime.

TUPLB04

Results of Testing of Multi-beam Klystrons for the European XFEL

klystron, cathode, high-voltage, vacuum

448

V. Vogel, L. Butkowski, A. Cherepenko, S. Choroba, I. Harders, J. Hartung
DESY, Hamburg, Germany

For the European XFEL multi-beam klystrons, which can produce RF power of 10 MW at an RF frequency of 1.3 GHz, at 1.5 ms pulse length and 10 Hz repetition rate, were chosen as RF power sources. Twenty-seven of horizontal multi-beam klystrons (MBK) together with connection modules (CM) will be installed in the XFEL underground tunnel. The CM will be installed on the MBK and connects the MBK to the pulse transformer with only one HV cable, because the CM has a filament transformer inside as well as all diagnostics for HV and cathode current measurements. MBK prototypes together with CM prototypes have been tested for long time at a test stand at DESY, about 3000 hours of operation for each of horizontal MBK with full RF output power, full pulse length and repetition rate of 10 Hz. Testing of first MBKs from series production has been started. In this paper we will give an overview of the test procedure, summarize the current test results and we will give a comparison of the most important parameters.

TUPB004

Results of Testing of Multi-beam Klystrons for the European XFEL

klystron, cathode, high-voltage, vacuum

479

V. Vogel, L. Butkowski, A. Cherepenko, S. Choroba, I. Harders, J. Hartung
DESY, Hamburg, Germany

For the European XFEL multi-beam klystrons, which can produce RF power of 10 MW at an RF frequency of 1.3 GHz, at 1.5ms pulse length and 10 Hz repetition rate, were chosen as RF power sources. Twenty-seven of horizontal multi-beam klystrons (MBK) together with connection modules (CM) will be installed in the XFEL underground tunnel. The CM will be installed on the MBK and connects the MBK to the pulse transformer with only one HV cable, because the CM has a filament transformer inside as well as all diagnostics for HV and cathode current measurements. MBK prototypes together with CM prototypes have been tested for long time at a test stand at DESY, about 3000 hours of operation for each of horizontal MBK with full RF output power, full pulse length and repetition rate of 10 Hz. Testing of first MBKs from series production has been started. In this paper we will give an overview of the test procedure, summarize the current test results and we will give a comparison of the most important parameters.

TUPB020

Status of the European XFEL 3.9 GHz system

cavity, HOM, cryomodule, coupling

519

E. Vogel
DESY, Hamburg, Germany
A. Bosotti, P. Michelato, L. Monaco, C. Pagani, R. Paparella, P. Pierini, D. Sertore
INFN/LASA, Segrate (MI), Italy
E.R. Harms
Fermilab, Batavia, USA

The third harmonic system at 3.9 GHz of the European XFEL injector section will linearize the bunch RF curvature, induced by first accelerating module, before the first compression stage. This paper presents qualification tests on cavity prototypes and the on-going activities towards the realization of the third harmonic section of the European XFEL in view of its commissioning in 2014.

TUPB040

Status of the Linac SRF Acquisition for FRIB

linac, cryomodule, cavity, SRF

564

M. Leitner, E.C. Bernard, J. Binkowski, B. Bird, S. Bricker, S. Chouhan, C. Compton, K. Elliott, B. Enkhbat, A.D. Fox, L.L. Harle, M. Hodek, M.J. Johnson, I.M. Malloch, D. R. Miller, S.J. Miller, T. Nellis, D. Norton, R. Oweiss, J.P. Ozelis, J. Popielarski, L. Popielarski, K. Saito, M. Shuptar, G.J. Velianoff, J. Wei, M. Williams, K. Witgen, Y. Xu, Y. Yamazaki, Y. Zhang
FRIB, East Lansing, USA
A. Facco
INFN/LNL, Legnaro (PD), Italy

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE SC0000661.
The Facility for Rare Isotope Beams (FRIB) will utilize a high-intensity, superconducting heavy-ion driver linac to provide stable ion beams from protons to uranium up to energies of >200 MeV/u and at a beam power of up to 400 kW. The ions are accelerated to about 0.5 MeV/u using a room-temperature 80.5 MHz RFQ and injected into a superconducting cw linac consisting of 330 individual low-beta cavities in 49 cryomodules operating at 2 K. This paper discusses the current status of the linac SRF acquisition strategy as the project phases into construction mode.

TUPB092

High Power Amplifier Systems for SARAF Phase II

controls, rf-amplifier, insertion, cavity

675

B. Kaizer, I. Fishman, I.G. Gertz
Soreq NRC, Yavne, Israel

Soreq NRC initiated the establishment of SARAF - Soreq Applied Research Accelerator Facility. SARAF is based on a continuous wave (CW), proton/deuteron RF superconducting linear accelerator with variable energy (5–40 MeV) and current (0.04-5 mA). RF power to each cavity is driven by a High Power Solid State Amplifiers. The paper outlines the design concept of the 10 and 15 kW at 176 MHz power amplifiers that were designed, built, and 10 kW successfully tested. 15 kW is now under construction. The amplifiers are combined from basic 5.5 kW compact 19" 7U water cooled drawer.