Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening

Rodnizki, J; Ben Aliz, Y; Grin, A; Horvitz, Z; Perry, A; Weissman, L; Davis, G Kirk; Delayen, Jean R.

Title: Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening

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Abstract

The Soreq Applied Research Accelerator Facility (SARAF) design is based on a 40 MeV 5 mA light ions superconducting RF linac. Phase-I of SARAF delivers up to 2 mA CW proton beams in an energy range of 1.5 - 4.0 MeV. The maximum beam power that we have reached is 5.7 kW. Today, the main limiting factor to reach higher ion energy and beam power is related to the HWR sensitivity to the liquid helium coolant pressure fluctuations. The HWR sensitivity to helium pressure is about 60 Hz/mbar. The cavities had been designed, a decade ago, to be soft in order to enable tuning of their novel shape. However, the cavities turned out to be too soft. In this work we found that increasing the rigidity of the cavities in the vicinity of the external drift tubes may reduce the cavity sensitivity by a factor of three. A preliminary design to increase the cavity rigidity is presented.

Authors:

Rodnizki, J ^[1]; Ben Aliz, Y ^[1]; Grin, A ^[1]; Horvitz, Z ^[1]; Perry, A ^[1]; Weissman, L ^[1]; Davis, G Kirk ^[2]; Delayen, Jean R. ^[3]

Soreq NRC, Yavne, Israel
JLAB
Old Dominion Universtiy

Publication Date:: Mon Dec 01 00:00:00 EST 2014

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1189953

Report Number(s):: JLAB-ACC-14-1962; DOE/OR/23177-3409

DOE Contract Number:: AC05-06OR23177

Resource Type:: Conference

Resource Relation:: Conference: LINAC14, 31 August-5 September 2014, Geneva, Switzerland

Country of Publication:: United States

Language:: English

Citation Formats


                    Rodnizki, J, Ben Aliz, Y, Grin, A, Horvitz, Z, Perry, A, Weissman, L, Davis, G Kirk, and Delayen, Jean R. Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening.  United States: N. p., 2014. 
        Web.

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                    Rodnizki, J, Ben Aliz, Y, Grin, A, Horvitz, Z, Perry, A, Weissman, L, Davis, G Kirk, & Delayen, Jean R. Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening.  United States.

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                    Rodnizki, J, Ben Aliz, Y, Grin, A, Horvitz, Z, Perry, A, Weissman, L, Davis, G Kirk, and Delayen, Jean R. 2014.  
        "Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening".  United States.  https://www.osti.gov/servlets/purl/1189953.

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@article{osti_1189953,

  title        = {Superconducting Accelerating Cavity Pressure Sensitivity Analysis and Stiffening},

  author       = {Rodnizki, J and Ben Aliz, Y and Grin, A and Horvitz, Z and Perry, A and Weissman, L and Davis, G Kirk and Delayen, Jean R.},

  abstractNote = {The Soreq Applied Research Accelerator Facility (SARAF) design is based on a 40 MeV 5 mA light ions superconducting RF linac. Phase-I of SARAF delivers up to 2 mA CW proton beams in an energy range of 1.5 - 4.0 MeV. The maximum beam power that we have reached is 5.7 kW. Today, the main limiting factor to reach higher ion energy and beam power is related to the HWR sensitivity to the liquid helium coolant pressure fluctuations. The HWR sensitivity to helium pressure is about 60 Hz/mbar. The cavities had been designed, a decade ago, to be soft in order to enable tuning of their novel shape. However, the cavities turned out to be too soft. In this work we found that increasing the rigidity of the cavities in the vicinity of the external drift tubes may reduce the cavity sensitivity by a factor of three. A preliminary design to increase the cavity rigidity is presented.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1189953},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Dec 01 00:00:00 EST 2014},

  month        = {Mon Dec 01 00:00:00 EST 2014}

}

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