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Title: Cryogenic RF Material Testing at SLAC

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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Name: Conf.Proc.C110328:1030-1032,2011; Conference: Particle Accelerator, 24th Conference (PAC'11) 28 Mar - 1 Apr 2011, New York, USA
Country of Publication:
United States

Citation Formats

Guo, Jiquan, Tantawi, Sami, Martin, David, Yoneda, Charles, and /SLAC. Cryogenic RF Material Testing at SLAC. United States: N. p., 2016. Web.
Guo, Jiquan, Tantawi, Sami, Martin, David, Yoneda, Charles, & /SLAC. Cryogenic RF Material Testing at SLAC. United States.
Guo, Jiquan, Tantawi, Sami, Martin, David, Yoneda, Charles, and /SLAC. 2016. "Cryogenic RF Material Testing at SLAC". United States. doi:.
title = {Cryogenic RF Material Testing at SLAC},
author = {Guo, Jiquan and Tantawi, Sami and Martin, David and Yoneda, Charles and /SLAC},
abstractNote = {},
doi = {},
journal = {Conf.Proc.C110328:1030-1032,2011},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 6

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  • The authors have developed an X-band SRF testing system using a high-Q copper cavity with an interchangeable flat bottom for the testing of different materials. By measuring the Q of the cavity, the system is capable to characterize the quenching magnetic field of the superconducting samples at different power level and temperature, as well as the surface resistivity. This paper presents the most recent development of the system and testing results.
  • No abstract prepared.
  • A new X-band RF gun (Mark-0) has been assembled, tuned and was tested in the ASTA facility at SLAC. This gun has been improved from an earlier gun used in Compton-scattering experiments at SLAC by the introduction of a racetrack dual-input coupler to reduce quadrupole fields. Waveguide-to-coupler irises were also redesigned to reduce surface magnetic fields and therefore peak pulse surface heating. Tests of this photocathode gun will allow us to gain early operational experience for beam tests of a new gun with further improvements (Mark-1) being prepared for SLAC's X-Band Test Area (XTA) program and the LLNL MEGa-ray program.more » Results of current testing up to {approx} 200 MV/m peak surface Electric fields are presented.« less
  • Several families of high power klystrons in S- and X-Band are being developed in the Klystron Laboratory at SLAC. To support these developments, a number of new pulse modulators are being designed from scratch, or upgraded from existing laboratory test modulators. This paper outlines the modulator parameters available in the SLAC Klystron Laboratory, and discusses two new modulators that are under construction.
  • The 1.5 Tesla superconducting solenoid is part of the BABAR Detector located in the PEP-II B-Factory machine at the Stanford Linear Accelerator Center. The solenoid has a 2.8 m bore and is 3.7 m long. The two layer solenoid is wound with an aluminum stabilized conductor which is graded axially to produce a {+-} 3% field uniformity in the tracking region. The 24 month fabrication, 3 month installation and 1 month commissioning of the solenoid were completed on time and budget. This paper summarizes the culmination of a 3 year design, fabrication and testing program of the BABAR superconducting solenoid.more » The work was completed by an international collaboration between Ansaldo, INFN, LLNL, and SLAC. Critical current measurements of the superconducting strand, cable and conductor, cool-down, operation with the thermo-siphon cooling, fast and slow discharges, and magnetic forces are discussed in detail.« less