PAC2013 - List of Authors (Hirshfield, J.L.)

Paper	Title	Page
WEPHO19	High-Power Low-Voltage Multi-Beam Klystrons for ILC and Project-X	978
	S.V. Shchelkunov Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA J.L. Hirshfield Yale University, Physics Department, New Haven, CT, USA J.L. Hirshfield Omega-P, Inc., New Haven, USA S. Kazakov, N. Solyak, V.P. Yakovlev Fermilab, Batavia, USA V.E. Teryaev BINP SB RAS, Novosibirsk, Russia
	Funding: This research is supported by U.S. DoE Two conceptual designs of multi-beam klystrons with parameters suitable for ILC and for the 8-GeV pulsed stage of Project X (PX) have been developed. The chief distinction of these tubes from other MBKs is their low operating voltage, namely 60 kV for the ILC tube and 30 kV for the PX tube. Advantages of low voltage include no requirement for pulse transformers or oil-tanks for high-voltage components, and compact modulators. A 6-beamlet quadrant of the ILC tube has been built and is undergoing tests; it is designed to produce 2.5 MW at 1.3 GHz in a 1.6 ms wide pulse at a 10 Hz pulse rate; a four-quadrant future version would produce 10 MW. The 6-beamlet PX tube is to produce 520kW, and would operate in one of two regimes, either at a repetition rate of 2Hz delivering 30 msec pulses, or at a repetition rate of 10Hz delivering 8.5 msec-long pulses. The PX tube is currently undergoing engineering design, with construction scheduled for completion towards the end of 2014.

WEPMA28	Multi-Harmonic Accelerating Cavities for RF Breakdown Studies	1040
	Y. Jiang Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA J.L. Hirshfield Yale University, Physics Department, New Haven, CT, USA J.L. Hirshfield Omega-P, Inc., New Haven, USA
	Funding: This research is supported by U.S. DoE. Multi-harmonic accelerating cavities that are explicitly designed for RF breakdown experiments are described. The fundamental TM010 and its higher harmonic TM011 or TM012 modes of the cavities are to be excited coherently by an external RF source in the expectation of lowering surface pulsed heating and/or surface electric field, so as to reduce breakdown probability and possibly achieve an increase in acceleration gradient.

WEPMA28	Multi-Harmonic Accelerating Cavities for RF Breakdown Studies	1040
	Y. Jiang Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA J.L. Hirshfield Yale University, Physics Department, New Haven, CT, USA J.L. Hirshfield Omega-P, Inc., New Haven, USA
	Funding: This research is supported by U.S. DoE. Multi-harmonic accelerating cavities that are explicitly designed for RF breakdown experiments are described. The fundamental TM010 and its higher harmonic TM011 or TM012 modes of the cavities are to be excited coherently by an external RF source in the expectation of lowering surface pulsed heating and/or surface electric field, so as to reduce breakdown probability and possibly achieve an increase in acceleration gradient.

Paper

Title

Page

High-Power Low-Voltage Multi-Beam Klystrons for ILC and Project-X

978

S.V. Shchelkunov
Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA
J.L. Hirshfield
Yale University, Physics Department, New Haven, CT, USA
J.L. Hirshfield
Omega-P, Inc., New Haven, USA
S. Kazakov, N. Solyak, V.P. Yakovlev
Fermilab, Batavia, USA
V.E. Teryaev
BINP SB RAS, Novosibirsk, Russia

Funding: This research is supported by U.S. DoE
Two conceptual designs of multi-beam klystrons with parameters suitable for ILC and for the 8-GeV pulsed stage of Project X (PX) have been developed. The chief distinction of these tubes from other MBKs is their low operating voltage, namely 60 kV for the ILC tube and 30 kV for the PX tube. Advantages of low voltage include no requirement for pulse transformers or oil-tanks for high-voltage components, and compact modulators. A 6-beamlet quadrant of the ILC tube has been built and is undergoing tests; it is designed to produce 2.5 MW at 1.3 GHz in a 1.6 ms wide pulse at a 10 Hz pulse rate; a four-quadrant future version would produce 10 MW. The 6-beamlet PX tube is to produce 520kW, and would operate in one of two regimes, either at a repetition rate of 2Hz delivering 30 msec pulses, or at a repetition rate of 10Hz delivering 8.5 msec-long pulses. The PX tube is currently undergoing engineering design, with construction scheduled for completion towards the end of 2014.

WEPMA28

Multi-Harmonic Accelerating Cavities for RF Breakdown Studies

1040

Y. Jiang
Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA
J.L. Hirshfield
Yale University, Physics Department, New Haven, CT, USA
J.L. Hirshfield
Omega-P, Inc., New Haven, USA

Funding: This research is supported by U.S. DoE.
Multi-harmonic accelerating cavities that are explicitly designed for RF breakdown experiments are described. The fundamental TM010 and its higher harmonic TM011 or TM012 modes of the cavities are to be excited coherently by an external RF source in the expectation of lowering surface pulsed heating and/or surface electric field, so as to reduce breakdown probability and possibly achieve an increase in acceleration gradient.

WEPMA28

Multi-Harmonic Accelerating Cavities for RF Breakdown Studies

1040

Y. Jiang
Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA
J.L. Hirshfield
Yale University, Physics Department, New Haven, CT, USA
J.L. Hirshfield
Omega-P, Inc., New Haven, USA

Funding: This research is supported by U.S. DoE.
Multi-harmonic accelerating cavities that are explicitly designed for RF breakdown experiments are described. The fundamental TM010 and its higher harmonic TM011 or TM012 modes of the cavities are to be excited coherently by an external RF source in the expectation of lowering surface pulsed heating and/or surface electric field, so as to reduce breakdown probability and possibly achieve an increase in acceleration gradient.