PAC2013 - List of Authors (Dudas, A.)

Paper	Title	Page
WEPBA15	Ribbon Electron Beam Source for Bunched Beam Profile Monitor and Tomography	916
	V.G. Dudnikov, A. Dudas Muons, Inc, Illinois, USA A.V. Aleksandrov ORNL, Oak Ridge, Tennessee, USA
	Ribbon electron beam source with a strip cathode has been designed, fabricated and tested. Image of the ribbon electron beam with width up to 15 cm has been registered on the luminescent screen. This ribbon beam can be used for the large proton bunch profile monitoring in the Spallation Neutron Source (SNS) proton storage ring (PSR). Advanced beam diagnostics are essential for high performance accelerator beam production and for reliable accelerator operation. It is important to have noninvasive diagnostics which can be used continuously with intense beams of accelerated particles. In a novel proposed device for realization of electron probe tomography a strip cathode is used for ribbon electron beam formation instead of a scanning of pencil beam used in the previous electron probe bunch profile monitors. With this device it is possible to develop almost ideal tomography diagnostics of bunches in linear accelerators and in circular accelerators and storage rings.

WEPHO16	An Efficient RF Source for JLab	969
	M.L. Neubauer, A. Dudas Muons, Inc, Illinois, USA R.A. Rimmer, H. Wang JLAB, Newport News, Virginia, USA
	Funding: Supported by DOE SBIT/STTR grant We propose the development of a highly reliable high efficiency RF source for JLAB with a lower lifetime cost operating at 80% efficiency with system operating costs of about 0.7M$/year for the 6 GeV machine. The design of the RF source will be based upon two injection locked magnetrons in a novel combining architecture for amplitude modulation and a cross field amplifier (CFA) as an output tube for the 12 GeV upgrade. A cost analysis including efficiency and reliability will be performed to determine the optimum system architecture. Several different system architectures will be designed and evaluated for a dual injection locked magnetron source using novel combining techniques and possibly a CFA as the output tube. A paper design for the 1497 MHz magnetron system will be completed. The optimum system architecture with all relevant specifications will be completed so that a prototype can be built

WEPHO17	High Power Co-Axial Coupler	972
	M.L. Neubauer, A. Dudas Muons, Inc, Illinois, USA J. Guo, R.A. Rimmer, R.S. Williams JLAB, Newport News, Virginia, USA
	A very high power Coax RF Coupler (MW-Level) is very desirable for a number of accelerator and commercial applications. For example, the development of such a coupler operating at 1.5 GHz may permit the construction of a higher-luminosity version of the Electron-Ion Collider (EIC) being planned at JLab. Muons, Inc. is currently funded by a DOE STTR grant to develop a 1.5-GHz high-power doublewindowcoax coupler with JLab (about 150 kW). Excellent progress has been made on this R&D project, so we propose an extension of this development to build a very high power coax coupler (MW level peak power and a max duty factor of about 4%). The dimensions of the current coax coupler will be scaled up to provide higher power capability.

WEPHO18	S-Band Load Design for SLAC	975
	M.L. Neubauer, A. Dudas Muons, Inc, Illinois, USA A. Krasnykh SLAC, Menlo Park, California, USA
	Funding: Work supported by DoE SBIR/STTR grant DE-SC000-7560 S-Band vacuum loads at the SLAC linac are encountering operational problems, now that they have to operate under the stringent requirements of the LCLS: 50 MW peak power, 6 kW average power, and extremely tight phase stability for the linac. Failure mechanisms have been studied which suggest an RF surface breakdown of the 200 μm Kanthal layer. We propose a novel solution which incorporates mode conversion from TE10 in rectangular waveguide to TE01 in round waveguide. Lossy material will be placed in the round waveguide, and the selection of the TE01 mode minimizes the electric field normal to the surface of the lossy material. A novel lossy ceramic material and a mechanical system for incorporating it into an S-band dry load were designed and tested. The manufacturing of components with the lossy ceramic material will be studied to find the optimum design for low-cost manufacturing of the complete load.

THPBA24	A Dipole Magnet for the FRIB High Radiation Environment Nuclear Fragment Separator	1280
	S.A. Kahn, A. Dudas, G. Flanagan, J.H. Nipper Muons, Inc, Illinois, USA M. Anerella, R.C. Gupta, J. Schmalzle BNL, Upton, Long Island, New York, USA
	Funding: U.S. DOE grants DE-SC-0006273 and DE-AC02-98CH10886 Magnets in the fragment separator region of the Facility for Rare Isotope Beams (FRIB) would be subjected to extremely high radiation and heat loads. Critical elements of FRIB are the dipole magnets which select the desired isotopes. Since conventional NiTi and Nb3Sn superconductors must operate at ~4.5 K, the removal of the high heat load generated in these magnets with these superconductors would be difficult. The coils for these magnets must accommodate the large curvature from the 30° bend that the magnets subtend. High temperature superconductors (HTS) have been shown to be radiation resistant and can operate in the 40 K temperature range where heat removal is an order of magnitude more efficient than at 4.5 K. This paper will describe the magnetic and preliminary engineering design of these magnets.

Paper

Title

Page

Ribbon Electron Beam Source for Bunched Beam Profile Monitor and Tomography

916

V.G. Dudnikov, A. Dudas
Muons, Inc, Illinois, USA
A.V. Aleksandrov
ORNL, Oak Ridge, Tennessee, USA

Ribbon electron beam source with a strip cathode has been designed, fabricated and tested. Image of the ribbon electron beam with width up to 15 cm has been registered on the luminescent screen. This ribbon beam can be used for the large proton bunch profile monitoring in the Spallation Neutron Source (SNS) proton storage ring (PSR). Advanced beam diagnostics are essential for high performance accelerator beam production and for reliable accelerator operation. It is important to have noninvasive diagnostics which can be used continuously with intense beams of accelerated particles. In a novel proposed device for realization of electron probe tomography a strip cathode is used for ribbon electron beam formation instead of a scanning of pencil beam used in the previous electron probe bunch profile monitors. With this device it is possible to develop almost ideal tomography diagnostics of bunches in linear accelerators and in circular accelerators and storage rings.

WEPHO16

An Efficient RF Source for JLab

969

M.L. Neubauer, A. Dudas
Muons, Inc, Illinois, USA
R.A. Rimmer, H. Wang
JLAB, Newport News, Virginia, USA

Funding: Supported by DOE SBIT/STTR grant
We propose the development of a highly reliable high efficiency RF source for JLAB with a lower lifetime cost operating at 80% efficiency with system operating costs of about 0.7M$/year for the 6 GeV machine. The design of the RF source will be based upon two injection locked magnetrons in a novel combining architecture for amplitude modulation and a cross field amplifier (CFA) as an output tube for the 12 GeV upgrade. A cost analysis including efficiency and reliability will be performed to determine the optimum system architecture. Several different system architectures will be designed and evaluated for a dual injection locked magnetron source using novel combining techniques and possibly a CFA as the output tube. A paper design for the 1497 MHz magnetron system will be completed. The optimum system architecture with all relevant specifications will be completed so that a prototype can be built

WEPHO17

High Power Co-Axial Coupler

972

M.L. Neubauer, A. Dudas
Muons, Inc, Illinois, USA
J. Guo, R.A. Rimmer, R.S. Williams
JLAB, Newport News, Virginia, USA

A very high power Coax RF Coupler (MW-Level) is very desirable for a number of accelerator and commercial applications. For example, the development of such a coupler operating at 1.5 GHz may permit the construction of a higher-luminosity version of the Electron-Ion Collider (EIC) being planned at JLab. Muons, Inc. is currently funded by a DOE STTR grant to develop a 1.5-GHz high-power doublewindowcoax coupler with JLab (about 150 kW). Excellent progress has been made on this R&D project, so we propose an extension of this development to build a very high power coax coupler (MW level peak power and a max duty factor of about 4%). The dimensions of the current coax coupler will be scaled up to provide higher power capability.

WEPHO18

S-Band Load Design for SLAC

975

M.L. Neubauer, A. Dudas
Muons, Inc, Illinois, USA
A. Krasnykh
SLAC, Menlo Park, California, USA

Funding: Work supported by DoE SBIR/STTR grant DE-SC000-7560
S-Band vacuum loads at the SLAC linac are encountering operational problems, now that they have to operate under the stringent requirements of the LCLS: 50 MW peak power, 6 kW average power, and extremely tight phase stability for the linac. Failure mechanisms have been studied which suggest an RF surface breakdown of the 200 μm Kanthal layer. We propose a novel solution which incorporates mode conversion from TE10 in rectangular waveguide to TE01 in round waveguide. Lossy material will be placed in the round waveguide, and the selection of the TE01 mode minimizes the electric field normal to the surface of the lossy material. A novel lossy ceramic material and a mechanical system for incorporating it into an S-band dry load were designed and tested. The manufacturing of components with the lossy ceramic material will be studied to find the optimum design for low-cost manufacturing of the complete load.

THPBA24

A Dipole Magnet for the FRIB High Radiation Environment Nuclear Fragment Separator

1280

S.A. Kahn, A. Dudas, G. Flanagan, J.H. Nipper
Muons, Inc, Illinois, USA
M. Anerella, R.C. Gupta, J. Schmalzle
BNL, Upton, Long Island, New York, USA

Funding: U.S. DOE grants DE-SC-0006273 and DE-AC02-98CH10886
Magnets in the fragment separator region of the Facility for Rare Isotope Beams (FRIB) would be subjected to extremely high radiation and heat loads. Critical elements of FRIB are the dipole magnets which select the desired isotopes. Since conventional NiTi and Nb3Sn superconductors must operate at ~4.5 K, the removal of the high heat load generated in these magnets with these superconductors would be difficult. The coils for these magnets must accommodate the large curvature from the 30° bend that the magnets subtend. High temperature superconductors (HTS) have been shown to be radiation resistant and can operate in the 40 K temperature range where heat removal is an order of magnitude more efficient than at 4.5 K. This paper will describe the magnetic and preliminary engineering design of these magnets.